Unidentified Signals

== Unidentified Signals ==

Unidentified Signals

Browse List of Unknown Signals in Database
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Title
Frequency range	—
Location
Mode
Modulation
Sort by	Modification dateFrequency minFrequency maxBandwidth minBandwidth max order descasc

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Signal type	Description	Frequency	Mode	Modulation	Bandwidth	Location	Sample Audio	Waterfall image
(RTTY?)	Somehow the Audiofile got corrupted. I'll try to add if, if it appears agian(mostly in the evening). HAM is a new teretory for me, so please excuse me, if this is a stupid question. I've taken a look into the Database, but no signal I've seen matches the specifications for this one. This is mobitex - Arclamp, Somehow the Audiofile got corrupted. I'll try to add if, if it appears agian(mostly in the evening). HAM is a new teretory for me, so please excuse me, if this is a stupid question. I've taken a look into the Database, but no signal I've seen matches the specifications for this one. This is mobitex - Arclamp	424.67 MHzMegaHertz (MHz) 10^6 Hz, 424.67 MHzMegaHertz (MHz) 10^6 Hz			11 kHzKiloHertz (kHz) 10^3 Hz, 11 kHzKiloHertz (kHz) 10^3 Hz		—
10.730 Mhz	10.730Mhz Uknown Signal . Signal also appears on 10,570.	10.57 MHzMegaHertz (MHz) 10^6 Hz — 10.73 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
145.870MHz	I couldn't get a small file of the IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis.. However, this frequency's always populated with evenly spaced lines of just that, and it typically forms	145.863 MHzMegaHertz (MHz) 10^6 Hz — 145.885 MHzMegaHertz (MHz) 10^6 Hz			30 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
147 Mhz burst type data							—	—
158.430.000 mhz	found this sound one day but could never figure out what it was	158.43 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
160.282.000 in Berlin, Germany	Intersting signal found close to railways. Not sure about purpose. Might be PSKPhase-Shift Keying?	160,282 MHzMegaHertz (MHz) 10^6 Hz — 160,282.2 MHzMegaHertz (MHz) 10^6 Hz
170 Hz Carriers at 70 MHz	Unknown Wideband Signal of multiple, varying, 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). spaced-carriers. Extending over at least 69.3 - 70.6 MHzMegaHertz (MHz) 10^6 Hz	69.35 MHzMegaHertz (MHz) 10^6 Hz — 71.56 MHzMegaHertz (MHz) 10^6 Hz
184.320 MHz Unknown, Crystal Ocillator?	Wikipedia references this frequency on its 'Crystal Ocillator Frequencies' page;" 184.320 -- WCDMA/3G -- Used in wireless base stations; 6x 30.72 MHzMegaHertz (MHz) 10^6 Hz " but I can't find much more information about 3G Base stations on this frequency, why or what it is for.	184.32 MHzMegaHertz (MHz) 10^6 Hz			400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
2021-05-01T16 37 56Z 27105p00kHz		27.105 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
236 MHZ pulses	like a half sine pulses	236 MHzMegaHertz (MHz) 10^6 Hz			2 kHzKiloHertz (kHz) 10^3 Hz
260,722 MHz	Continuous signal with FHSS "Waterdroplets"	260.722 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
2740 MHz - US Weather Radar - WSR-88D???	Unknown Signal	2,740 MHzMegaHertz (MHz) 10^6 Hz, 2,740 MHzMegaHertz (MHz) 10^6 Hz			5 MHzMegaHertz (MHz) 10^6 Hz		—
3790KHz unidentified signal	Received by luck on 3790KHz on after midnight of September 08 and September 09 2020 (Greece time).	3.79 MHzMegaHertz (MHz) 10^6 Hz			3 kHzKiloHertz (kHz) 10^3 Hz
3905 Khz	Received this between 18-18:05 UTC on the 16th January 2018	3.905 MHzMegaHertz (MHz) 10^6 Hz, 3.905 MHzMegaHertz (MHz) 10^6 Hz						—
3985 kHz	Recorded via Twente SDR (Enschede, Netherlands).	3.985 MHzMegaHertz (MHz) 10^6 Hz					—
40M pulsing spark gap lijke QRN every night continuing until daylight	40M pulsing spark gap like QRN	7.1 MHzMegaHertz (MHz) 10^6 Hz			200 kHzKiloHertz (kHz) 10^3 Hz
421.850 during Tour de France	Unknown signal received during Tour de France near Paris. Signal looks like APT, but sure it is not.	421.85 MHzMegaHertz (MHz) 10^6 Hz			18 kHzKiloHertz (kHz) 10^3 Hz
433p90	Repeating signal. seems like a wireless keyboard, bge power meter, or a comcast xr2 remote	433.9 MHzMegaHertz (MHz) 10^6 Hz			433.8 MHzMegaHertz (MHz) 10^6 Hz — 433.95 MHzMegaHertz (MHz) 10^6 Hz
433p920	Rapid data bursts. two seem to be playing consecutively.	433.92 MHzMegaHertz (MHz) 10^6 Hz
444, 275 MHz		43.723 MHzMegaHertz (MHz) 10^6 Hz — 444.275 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
479.999 Uknown Beeping Signal	Found this signal on 479.999.810 MHzMegaHertz (MHz) 10^6 Hz. It is constantly transmitting on this frequency. I don't really know if it is a USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation or not.	479.999 MHzMegaHertz (MHz) 10^6 Hz			1.3 MHzMegaHertz (MHz) 10^6 Hz
80 Meter Unknown	I get this signal from 3.0 MHzMegaHertz (MHz) 10^6 Hz through 6.5 MHzMegaHertz (MHz) 10^6 Hz about 480 KHzKiloHertz (kHz) 10^3 Hz apart Any Idea what it might be?	3 MHzMegaHertz (MHz) 10^6 Hz — 6.5 MHzMegaHertz (MHz) 10^6 Hz
863p151p150		863.151 MHzMegaHertz (MHz) 10^6 Hz			142 kHzKiloHertz (kHz) 10^3 Hz
869.525					130 kHzKiloHertz (kHz) 10^3 Hz
?? satellite maybe?	RTTYRadio TeleTYpe	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
A bunch of alternating tones..	I found this while scanning around the military air band with my SDR, and about midway through the audio file, you can hear something that sounds like a modem, very odd. There are also more than one of them on the band, on several different frequencies. Never heard anything like it.
AM signal	Signal appeared on AMAmplitude Modulation band in March. At that time it was covering 580 kHzKiloHertz (kHz) 10^3 Hz to about 1160 kHzKiloHertz (kHz) 10^3 Hz strongest at 900 kHzKiloHertz (kHz) 10^3 Hz. It disappeared for a time and returned in August at less strength. Can be heard for about 8 miles to the north. We are on the ocean, so unknown how far in that direction.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
Anomalous Russian signal	Received a Russian? CQ call but the antenna was only a small Y/B LED hooked up to test the radio. I tried to get a recording but the event (around 7am) lasted only a few seconds. Seemed very narrow band though and I did some fine tuning to try and optimize it, in retrospect should have got a screen shot.	28.469 MHzMegaHertz (MHz) 10^6 Hz			25 kHzKiloHertz (kHz) 10^3 Hz		—	—
BBC Radio on 70m ?	Just randomly saw it and though it was a normal amatuer but it has been going for 1 hour straight Its not fm interference . I have terreble signal or bbc radio so it is defendly not fm interference	442 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			11 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Beeping	its a series of beeps in different tones (it might be a satellite but that is what I think)	7.044 kHzKiloHertz (kHz) 10^3 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Beeping morse-like signal found on 599p99 MHz	Beeping morse-like signal at 299,995MHz found in Lisbon, Portugal. Using stock antenna from RTL820T2 RTL dongle and SDR#.	299.995 MHzMegaHertz (MHz) 10^6 Hz			350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Bermuda 460.100MHz	Recorded in Bermuda on 460.100Mhz. I believe it may be an MPT system?	460.1 MHzMegaHertz (MHz) 10^6 Hz						—
Bird Signal	Appeared in 2021 then transmitted every day until it stopped around 4 months ago Sends weird distorted noises	445.3 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz			—
Bird Song Oddity	Here is an Oddity Station heard on the WebSDR at the University of Twente that transmitted a loop of birds chirping. This recording is from May 16 2016. It occurred during the nights. Some say it may have been from Germany. Last heard around April 2017.	6.965 kHzKiloHertz (kHz) 10^3 Hz — 6.985 kHzKiloHertz (kHz) 10^3 Hz						—
Bonaire								—
Broadcast FM Whistling	I was scanning FMFrequency Modulation radios when suddenly I found this. Possible solution: Hobbyist single-transistor tracking transmitter.	102 MHzMegaHertz (MHz) 10^6 Hz
C4FM modulation + DSD	Hello, I'm attempting to decode local police communication with GQRX and DSD. DSD is receiving the audio from GQRX fine, however it reports many errors when decoding. Comparing what I capture from my SDR from other examples on the internet, it seems the speed of the transmission I receive is slower than normal. I want to say the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate of the local police transmission is lower than normal. I could be wrong on that as I am new to this. Any help/tips would be appreciated. Thanks.							—
CTCSS Alone	Double CTCSS Code	28.08 MHzMegaHertz (MHz) 10^6 Hz			120 kHzKiloHertz (kHz) 10^3 Hz		—
Canada 155.325		155 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).						—
Constant Stream	n/a	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		—
Constant beeping sound	Constant beeping noise. Does not emmit any sound on other modes than CWContinuous Wave.	296.69 MHzMegaHertz (MHz) 10^6 Hz			760 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Constantly repeating signal		419.324 MHzMegaHertz (MHz) 10^6 Hz			16 kHzKiloHertz (kHz) 10^3 Hz
Continu signal on 423Mhz since today 20/01/21	Since today a continuously signal with a twisting waterfall.. Bandwith 12.5Khz The audio file is RAW	423.425 MHzMegaHertz (MHz) 10^6 Hz			12 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 5 kHzKiloHertz (kHz) 10^3 Hz
Continuous chirping	Probably some kind of telemetry. Pay attention to the -5k/+5k delimiters	434.675 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Continuously signal on 424.493Mhz	continuous signal on 2 different frequencies : 424.493Mhz and 424.793Mhz <-(on this frequency is the sound just a little slower) i think it has something to do with the public buscompany	424 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
DNA-like shifting frequencies signal	It shows up as several mirror-images throughout the spectrum, some very close to each other, all of them exact copies of the original signal	800 MHzMegaHertz (MHz) 10^6 Hz — 900 MHzMegaHertz (MHz) 10^6 Hz					—
Digital SSTV?	Seen it on the Web-SDR Twente. It could be on any frequency. It's quite a short signal to contain a picture. Text (a callsign?) is visible in the waterfall sometimes at the end and sometimes at the beginning of the soundburst. In the audiofile it is at the beginning. The signal begins at 30 second mark. Someone suggested it was Easypal made signal	3.735 MHzMegaHertz (MHz) 10^6 Hz
Digital code in UHF	Tuner: Rtl-Sdr (RTL2832U+R820T2 100KHz 1.7GHz) Antenna: TV antenna (ASP-8S) Software: SDR# Frequency: 447.772.200 HZ Signal period: 0-24	447.722 MHzMegaHertz (MHz) 10^6 Hz			13.49 kHzKiloHertz (kHz) 10^3 Hz
Dot Signal	Can be heard on any SDR Reciever,radio,even FMFrequency Modulation radio.	100 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 6.666 kHzKiloHertz (kHz) 10^3 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Dupliate of MPT1327		165 MHzMegaHertz (MHz) 10^6 Hz
Electronic bagpipes	I first heard this signal today, 11/28/2019 on 169.344.500 MHzMegaHertz (MHz) 10^6 Hz using HackRF SDR fed with a discone antenna, demodulated using SDR Console 3. It seems to be continuous over the span of half an hour. I have no idea what it may be, I heard a similar signal on 460.0500 MHzMegaHertz (MHz) 10^6 Hz on scanner.	169.345 MHzMegaHertz (MHz) 10^6 Hz			16 kHzKiloHertz (kHz) 10^3 Hz
Errant Signal on 2m Ham Band	Errant signal spread across the 2m ham band. Local interference ruled out.	147.455 MHzMegaHertz (MHz) 10^6 Hz
Exotic Cipher	An exotic polytone data type.	6.215 kHzKiloHertz (kHz) 10^3 Hz						—
FRN Gateway Data 27Mhz unid	FRN Gateway Data 27Mhz unid FFSKFast Frequency-Shift Keying Data Signal	27 MHzMegaHertz (MHz) 10^6 Hz — 446 MHzMegaHertz (MHz) 10^6 Hz						—
FSK Data Rollercoaster	Recording using USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables); baby monitor system is NFMNarrowband Frequency Modulation.	864.878 MHzMegaHertz (MHz) 10^6 Hz			32 kHzKiloHertz (kHz) 10^3 Hz
FSK Signal	I was looking at a websdr when I found this odd signal.	6.94 MHzMegaHertz (MHz) 10^6 Hz			6.94 MHzMegaHertz (MHz) 10^6 Hz
FSK?	It looks like some type of FSKFrequency-Shift Keying signal on 409.300 MHzMegaHertz (MHz) 10^6 Hz. Probably some telemetry.	409.3 MHzMegaHertz (MHz) 10^6 Hz			7.5 kHzKiloHertz (kHz) 10^3 Hz
Found in Kings Beach,CA near 315mhz	Found while driving through King's Beach, CA. [1] Relatively weak, visibly disperses over the ~2-4 miles driven during the waterfall recording. (FYI the bursts near 315mhz, are just TPMS messages, as we were driving...)	314 MHzMegaHertz (MHz) 10^6 Hz — 315 MHzMegaHertz (MHz) 10^6 Hz					—
Frequency Drifting Data Transmission	Unknown signal that constantly drifts in frequency between 13.795Mhz - 13.830Mhz, I'd like to learn what it is. Recorded in USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation.	13.795 MHzMegaHertz (MHz) 10^6 Hz — 13.83 MHzMegaHertz (MHz) 10^6 Hz
Gas Meter Signal?	I received this signal when I was looking on my waterfall, looking for DMR signals. I thought it was voice initially, but when I tuned to it, it turned out to be a strange signal, that I've not seen before. It's constant, but sometimes it seems like it's fading out but the signal's always there.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Generator Signal	This signal only appears on 464,000 kHzKiloHertz (kHz) 10^3 Hz	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 464 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Giant Band of Signal		1 MHzMegaHertz (MHz) 10^6 Hz — 2 MHzMegaHertz (MHz) 10^6 Hz			1 MHzMegaHertz (MHz) 10^6 Hz
Ham Band Interference	This is ALWAYS here, but much less strong at night.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		—
I am constantly geting this wave	it is usually seen 4-5 times daily with a duration about 30 min.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Is this Packet	Hi, I Think this signal if for display hour of the Mistral-Nework (Network of buses for the town). Apologies for my poor english ! Best regards. F5AAJ / Michel.	444.513 MHzMegaHertz (MHz) 10^6 Hz						—
K3UU-Unknown	Comes on air every evening at 2300UTC and off air at 2400 UTC. The two frequencies where this signal is heard are always 282 kHzKiloHertz (kHz) 10^3 Hz apart. Heard on numerous EastCoast USA WebSDR receivers, although the farther north from Florida you get the weaker the signal is. Unable to hear on any South America WebSDR, as most of them are too far south. The attached recording was taken with LSBLower Side Band Modulation, bandwidth on receiver is 2.5 kHzKiloHertz (kHz) 10^3 Hz.	6.902 MHzMegaHertz (MHz) 10^6 Hz — 7.184 MHzMegaHertz (MHz) 10^6 Hz						—
MFSK in middle of tetra band	A bit of a mystery MFSKMultiple Frequency Shift-Keying? signal in middle of tetra band	380 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 9,265 MHzMegaHertz (MHz) 10^6 Hz			5.28 kHzKiloHertz (kHz) 10^3 Hz
Maritime Public Safety Radio Network P25	https://drive.google.com/drive/folders/0B1Cfk2C-y-z7d1dsbmlsMlBEWUE?usp=sharing This is a sample of my local Maritime Public Safety Radio Network in the APCO Project 25 mode. The reason I am submitting this is because no matter what I do, DSD+ does not decode it whatsoever. I have tested it on sample P25 signals, and it seems to work fine.	769.656 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Maybe XF faders	Sounds like XF Faders	4.5 MHzMegaHertz (MHz) 10^6 Hz			9 kHzKiloHertz (kHz) 10^3 Hz			—
Mistery HF Signal seen on a Web Sdr radio	Very wide Spectrum Signal seen at diverse parts of the HFHigh Frequency (3-30 MHz) Spectrum since a week starting in October 2020	4.915 kHzKiloHertz (kHz) 10^3 Hz			3 MHzMegaHertz (MHz) 10^6 Hz		—
NOAA APT Oddity	I was waiting for a pass from the satellite NOAA 18 when I was a choppy APT signal from what I assumed from NOAA 19, but a picture from WXtrack showed that its radio horizon was over 1,000 miles away from my location (the green cross).l I am not sure if this is some sort of signal propagation or if there was an old NOAA satellite that may have come back to life (I have seen articles from a few sources of how this might be).	137.1 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 45 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		—	—
New possible Russian Digimode	The signal is believed to be a new russian communication mode/modem. I found this signal with my SdrplayRsp2Pro and a 15m (50ft) longwire antenna with 1:9 Unun. The signal was also heard on the Websdr in the Netherlands so it was not local.	10.225 MHzMegaHertz (MHz) 10^6 Hz — 10.24 MHzMegaHertz (MHz) 10^6 Hz			15 kHzKiloHertz (kHz) 10^3 Hz
Nknown 472p875		472.875 MHzMegaHertz (MHz) 10^6 Hz — 504.675 MHzMegaHertz (MHz) 10^6 Hz			6 kHzKiloHertz (kHz) 10^3 Hz
Noise on 160m	Hi, this noise has recently appeared on top band, 160m and I wondered if anyone has any idea of it's origin. Speculation is that it is over the horizon radar coming from France. Any suggestions would be greatly appreciated since it is destroying a UK net that has been running on 1933 for many years.	1.933 MHzMegaHertz (MHz) 10^6 Hz
Noise on HF HAM Bands from 0 to 30 Mhz		0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Noise over all HF bands	Strange noise that starts middle of a day and ends in the evening. All HFHigh Frequency (3-30 MHz) bands are almost covered ( after 17MHz it starts to fade) clearly are visible harmonics.
Noise-like signal	There are stationary and moving signals I think. Likely police radio.	148.6 MHzMegaHertz (MHz) 10^6 Hz — 169.775 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Non lo so	vorrei sapere che segnale è, ci sono momenti in cui gli impulsi cambiano come per completare un messaggio, va avanti per ore credo, e non c'è sempre, in certi giorni c'è credo, e la seconda volta che lo trovo [ I would like to know what signal it is, there are times when the impulses change as if to complete a message, it goes on for hours I think, and it's not always there ]	163.89 MHzMegaHertz (MHz) 10^6 Hz
Odd Multi Tone signal, might be a remote control.		33.257 MHzMegaHertz (MHz) 10^6 Hz			33,169 MHzMegaHertz (MHz) 10^6 Hz — 33,350 MHzMegaHertz (MHz) 10^6 Hz		—
Odd Signal	Was scanning around the 10 meter band with my SDR when I found this AMAmplitude Modulation signal.	25.175 MHzMegaHertz (MHz) 10^6 Hz
Odd signal	not sure if it could be analog or not but i haven't seen anything like it.	6.58 MHzMegaHertz (MHz) 10^6 Hz
Oddity AM
One of many signals near 877 MHz	Probably 3G or 4G cellular signals	877.875 MHzMegaHertz (MHz) 10^6 Hz			2.55 MHzMegaHertz (MHz) 10^6 Hz		—
One with squelch	Left signal keeps period pretty well. Haven't noticed any changes yet. It's not always active, but I can see it most of the day. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. available	137.5 MHzMegaHertz (MHz) 10^6 Hz			60 kHzKiloHertz (kHz) 10^3 Hz
Over the Horizon Radar		14.541 MHzMegaHertz (MHz) 10^6 Hz			30 kHzKiloHertz (kHz) 10^3 Hz
Periodic Signal - Potentially Police Related	This signal is audible on all scanner, FMFrequency Modulation radios I own. Even picked up on analog television in some cases. The strong signal is mainly identified by its tone, data, and sometimes another tone. Repeats about twice a minute, but varies on the side of less frequent. On occasion, the tone is followed by a large and long burst of data, and then another tone. Identified !! This is a Pocsag type Pager signal. Often used by hospitals.	152.69 MHzMegaHertz (MHz) 10^6 Hz			13 kHzKiloHertz (kHz) 10^3 Hz			150px
Police Idling Walkie Talkie Radio Signal	I found out what Unknown 453 was, the one that I posted a few weeks ago, it is a police idling signal, apparently the police signal belongs to the remote SDR I was listening to, but I got my own SDR now. So yeah, it is an idling signal for a police walkie-talkie	453.6 MHzMegaHertz (MHz) 10^6 Hz
Possible Russian Marker 'Airhorn' 4020kHz	Unknown signal that was recently discovered a few days ago on the uTwente webSDR. Features a suppressed lower sideband. Strong reception in Poland's webSDR.	4.02 MHzMegaHertz (MHz) 10^6 Hz			2.8 kHzKiloHertz (kHz) 10^3 Hz
Possible Telemetry GFSK signal on 220Mhz	Possible train telemetry signal on 220.365Mhz. Pulsed GFSKGaussian Frequency-Shift Keying signal. Runs 24x7	220.365 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz
Possible low level wind shear alert system	Frequency matches known wind shear alert system frequencies used in aeronautics. Captured near an airport, so this is likely, but have no way to confirm.	409.572 MHzMegaHertz (MHz) 10^6 Hz			250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Possible weather station sensor on air band	Three strong signals at 120MHz, in the air band. Source of signal is unknown. Polarisation seems to be circular, as both vertical and horizontal dipoles can receive it at similar strengths.	120 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz — 14 kHzKiloHertz (kHz) 10^3 Hz
Possibly a RADAR	https://www.reddit.com/r/RTLSDR/comments/aa2hi6/found_at_3603018_mhz_in_massachusetts_any_idea/	360.3 MHzMegaHertz (MHz) 10^6 Hz
Potential Radar	Unknown signal, about 1.7 seconds in length, with an interval of around 6 to 8 seconds. Recorded via Twente SDR. An identical signal also appears around 4023-4040 Khz.	3.313 MHzMegaHertz (MHz) 10^6 Hz — 3.331 MHzMegaHertz (MHz) 10^6 Hz			18 kHzKiloHertz (kHz) 10^3 Hz
Pulsar on 33.0005 GHz	Hi i found this signal on 33GHz Freq., signal is pulsation from unknow source	5 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 33 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			200 kHzKiloHertz (kHz) 10^3 Hz
Pulsing Digital Signal	Pulsing signal I found. Transmits intermittently with varying amount of pulses.	410.85 MHzMegaHertz (MHz) 10^6 Hz — 474.975 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Pulsing interference in ISM band	This pulsing is constant 24/7 dont know which type of interference it is, and it also seems to spread out like a mobile network when moving to the right of the main peak.	912.925 MHzMegaHertz (MHz) 10^6 Hz			32 kHzKiloHertz (kHz) 10^3 Hz
RF signal modulate at low frequency	Signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file can be downloaded from Microsoft file server : Download files at : https://1drv.ms/u/s!AvlNmSqrGlNVgTF6qyGs9d8h3fBS Note : File is +/- 2 GB Waterfall image : https://1drv.ms/i/s!AvlNmSqrGlNVgWivmYjg2UxL-zM1	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).						—
Radiomodem 423 875	Electric utility radiomodem network. Probably Satel radiomodem.	423.875 MHzMegaHertz (MHz) 10^6 Hz			25 kHzKiloHertz (kHz) 10^3 Hz
Repeated Signal	A repeated GMSKGaussian Minimum-Shift Keying signal found at 409.905MHz. Short burst repeats about every 2 minutes. Probably from a satellite in geosynchronous orbit. USA, Texas	409.905 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Repeated Tone	A repeated tone found at 457.68MHz - Cambridge, England, UK.	457.68 MHzMegaHertz (MHz) 10^6 Hz			13 kHzKiloHertz (kHz) 10^3 Hz
Repeated across HF	Strong CWContinuous Wave signal at approximately 3.064 kHzKiloHertz (kHz) 10^3 Hz, changes to 3.079 kHzKiloHertz (kHz) 10^3 Hz once per second for about a quarter of a second and then back. Possibly very fast sweep. Echos of it across the lower HFHigh Frequency (3-30 MHz) spectrum. Pauses on the high side periodically then resumes. Usually active during daylight hours, but not at night.	3.064 kHzKiloHertz (kHz) 10^3 Hz			15 kHzKiloHertz (kHz) 10^3 Hz
Repeating signal 404MHz	Many peaks from 403 to 405 MHzMegaHertz (MHz) 10^6 Hz, duration 1-2 seconds. Repeating.	403 MHzMegaHertz (MHz) 10^6 Hz — 405 MHzMegaHertz (MHz) 10^6 Hz					—
Rezonans-N type radar	This is radar working about 10 seconds per hour every day on different frequencies.	3 MHzMegaHertz (MHz) 10^6 Hz — 24 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz — 40 kHzKiloHertz (kHz) 10^3 Hz
SBK Radio		127 MHzMegaHertz (MHz) 10^6 Hz			127 MHzMegaHertz (MHz) 10^6 Hz		—	—
Same signal from unknow source		434 MHzMegaHertz (MHz) 10^6 Hz			300 kHzKiloHertz (kHz) 10^3 Hz		—
Short PSK or AFSK pulses at 461.025	Either an extremely fast PSKPhase-Shift Keying or FSKFrequency-Shift Keying/AFSKAudio Frequency-Shift Keying link located in the UHFUltra High Frequency (300-3000 MHz) band appearing every second. Found today.	461.025 MHzMegaHertz (MHz) 10^6 Hz			9.2 kHzKiloHertz (kHz) 10^3 Hz
Signal inconnue		444.525 MHzMegaHertz (MHz) 10^6 Hz
Signal that is moving down	Weird signal that moves slower the lower it gets down the band. If the mode is set to NFMNarrowband Frequency Modulation, WFMWideband Frequency Modulation, AMAmplitude Modulation and probaly some more it doesn't give any sound. However in CWContinuous Wave and RAW it sounds like a high pitched noise.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).					—
Similar to XPB polytone	A strange polytone (?) that is very short and occurs randomly.	4.603 MHzMegaHertz (MHz) 10^6 Hz — 4.618 MHzMegaHertz (MHz) 10^6 Hz
Single Tone	It keeps broadcasting nonstop (from the time I started listening). Doesn't seem to have a purpose, but what is making it? Used SDR# - Tuned in at 172.7551 MHzMegaHertz (MHz) 10^6 Hz - Recorded using CWContinuous Wave	172.755 MHzMegaHertz (MHz) 10^6 Hz			400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Sliding tone	Lasted from 15:45 UTC to 15:50 UTC image Inconsistent beeping, with pitch constantly sliding and changing, like a slide whistle	5.25 MHzMegaHertz (MHz) 10^6 Hz			2.4 kHzKiloHertz (kHz) 10^3 Hz		—	—
Solved. Is a DRM Transmitter	Solved: Is a DRM Transmitter, nothing weird.	7.22 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz		—
Some Sort of Packet ?	Was scanning around my neighborhood one day with my Windsor FMFrequency Modulation radio, and then, I stumbled upon this. Sounds a bit like GMDSS, but a lot longer of a signal. Maybe some sort of encryption? Anyways, due to the numbering of FMFrequency Modulation frequencies on my Windsor starting at 88.000 MHZ, I can only estimate what frequency this signal is on. So, sorry for that. It seems to not be only a local phenomenon, as I've heard somebody in France on this website report hearing a similar signal on VHFVery High Frequency (30-300 MHz) frequency I believe.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Some Sort of Packet?	Was scanning at my local park one day with my Windsor FMFrequency Modulation radio, and then, I stumbled upon this. Sounds a bit like GMDSS, but a lot longer of a signal. Maybe some sort of encryption? Anyways, due to the numbering of FMFrequency Modulation frequencies on my Windsor starting at 88.000 MHZ, I can only estimate what frequency this signal is on. So, sorry for that. It seems to not be only a local phenomenon, as I've heard somebody in France on this website report hearing a similar signal.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Some kind of MOBITEX	I just found this signal with my RSP2. I have no idea what it is? Maybe Mobitex?	869.4 MHzMegaHertz (MHz) 10^6 Hz — 869.55 MHzMegaHertz (MHz) 10^6 Hz			150 kHzKiloHertz (kHz) 10^3 Hz
Sonde type id	while searching for sonde this came up used sonde monitor but didnt decode ? any idea what sonde type gives this waterfall pattern ? 23:15 to 00:30 gets strong then dies off so all consistant with sonde	404 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			8 kHzKiloHertz (kHz) 10^3 Hz		—
Sounds like a pager	This sounds like a pager but PDW couldn't detect anything, so it might be some other digital communication.	75.58 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Squiggling oddity	maybe a broken beacon or something? idk
Strange Musical Repeating Tone - 945.716 MHz	Found when noticing harmonics in ~400 MHzMegaHertz (MHz) 10^6 Hz, comes out strongest @ 945.716 MHzMegaHertz (MHz) 10^6 Hz	945.716 MHzMegaHertz (MHz) 10^6 Hz			32 kHzKiloHertz (kHz) 10^3 Hz
Strange Noise Around 889mhz	I have no idea and was just scanning around the frequencies. and wonder what it is	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
Strange Signal	I found out that it was my old thermostat for my central heating. As soon as i pressed a button the signal changed. Replaced it with a new one. Now it is gone.	27 MHzMegaHertz (MHz) 10^6 Hz — 446 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Strange beeps at 1.2ghz	strange beeps @ the 1.200018 range (my rtl-sdr isn't calibrated right, so there may be frequency drift on my end)	1,200.019 MHzMegaHertz (MHz) 10^6 Hz			4.5 kHzKiloHertz (kHz) 10^3 Hz
Strange signal starst at 13388-13640 khz		0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			250 kHzKiloHertz (kHz) 10^3 Hz		—
Strange unknown signal on 423.550 mhz	Hi, i don't know what it is, on 423.375 and 423.550 mhz very strange and strong unknown signal	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			10 kHzKiloHertz (kHz) 10^3 Hz		—
Strong HF signal		7.735 kHzKiloHertz (kHz) 10^3 Hz — 16.11 kHzKiloHertz (kHz) 10^3 Hz			100 kHzKiloHertz (kHz) 10^3 Hz		—
Strong UNID Horn-like signal	Incredibly strong horn-like signal.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			250 kHzKiloHertz (kHz) 10^3 Hz
UNID Bursts	This is a baby monitor located on the European ISM band. Most likely the data being transfered in an USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation	864.95 MHzMegaHertz (MHz) 10^6 Hz			6.31 kHzKiloHertz (kHz) 10^3 Hz
UNID RUSSIA USB 6 8 2019 1605Z	Monitored on Russian SDR continuous half second pulses. Monitored at 1605 UTC.	43.1 MHzMegaHertz (MHz) 10^6 Hz			1 kHzKiloHertz (kHz) 10^3 Hz
UNID Telemetry	This is a frequency I picked up in my home town, I believe it is telemetry from a water tower, but would like to know what standard it is using and if there's any way I can find a program that will decode its information.	461 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			10 MHzMegaHertz (MHz) 10^6 Hz
UNID Telemetry, pulsing	Identified: APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area signal with position, probably some balloon I couldn't get an IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample in time because the signal started fading out. Hopefully this is not a problem.	443.287 MHzMegaHertz (MHz) 10^6 Hz
UNID microwave sounding signal 12 MHz	well, it sounds like someone left their chicken nuggets in the microwave on FMFrequency Modulation, completely UNID to me idk what it is, seems to be a real signal and not RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum.	12.022 MHzMegaHertz (MHz) 10^6 Hz — 12.025 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
UNID telemetry/paging bursts	Unknown telemetry or paging bursts. Sounds similar to this UNID signal: Unknown 40 3	446.45 MHzMegaHertz (MHz) 10^6 Hz			10 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
UNKNOWN 10p140							Html5mediator: file extension not recognized	—
UNKNOWN 9.170 MHZ	Signal seem to have three different modulation schemes, or there was multiple emitters.	9.176 MHzMegaHertz (MHz) 10^6 Hz — 9.236 MHzMegaHertz (MHz) 10^6 Hz			9 kHzKiloHertz (kHz) 10^3 Hz			—
UnId2LongIsland	Hear this signal all day, don't know what it is.	8.66 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz		—	—
UnIdEastEurope	Herd on 4181.0 Mhz via KDSR. One second tones like time sig but no voice or Morse code. Monitored at 2335 - 0020 UTC	4,181.8 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz
Unid 4-FSK	Really long transmission. Started of with many minutes of 4 pilot tones	6.979 MHzMegaHertz (MHz) 10^6 Hz			1.9 kHzKiloHertz (kHz) 10^3 Hz
Unid ISM 900MHz	Many frequency hopping ISM bursts. Telemetry of sorts. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file available	903 MHzMegaHertz (MHz) 10^6 Hz — 914 MHzMegaHertz (MHz) 10^6 Hz					—
Unid Low VHF	It is going 24/7, sometimes one stations, sometimes two. I believe it is something from the military. Location Kempele, Finland.	40.665 MHzMegaHertz (MHz) 10^6 Hz			2.4 kHzKiloHertz (kHz) 10^3 Hz
Unid analogue signal - ecg like		0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			50 kHzKiloHertz (kHz) 10^3 Hz		—
Unidentified 406p214	Unidentified signal, 24/7 carrier, transmits mfsk-8? every 15 minutes. transmitter appears broken.	406.214 MHzMegaHertz (MHz) 10^6 Hz			14 kHzKiloHertz (kHz) 10^3 Hz
Unidentified 433Mhz Oscillating Signal	Band Reserved to ISM and LPD applications, unknown type of signal.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			2 kHzKiloHertz (kHz) 10^3 Hz		—
Unidentified 466 MHz digital signal	This signal changes frequencies every few seconds inside a range between 460-470 MHzMegaHertz (MHz) 10^6 Hz.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).					—
Unidentified 5066p3kHz signal	New to this stuff so not sure if it's an identifiable signal but does not seem to be a data transmission, appears to have been going on for at least a few hours at time of submitting. Your signal found is actually Link-11 apparently without a tone. <AT90S2323>	5.066 MHzMegaHertz (MHz) 10^6 Hz
Unidentified 959.85MHz	Mystery signal captured in Tulsa, Oklahoma. Signal has strong carrier at 959.85MHz with short pulses in about 4.5KHz each direction.	959.856 MHzMegaHertz (MHz) 10^6 Hz			9 kHzKiloHertz (kHz) 10^3 Hz
Unidentified Bus Timetable Data	Hi there, our local bus company in Aberdeen transmits timetable information to bus stops using this mode... but I can't identify what type of transmission it is. Hope someone can help! Received on 204.9625 MHzMegaHertz (MHz) 10^6 Hz in Aberdeen, Scotland.	204.963 MHzMegaHertz (MHz) 10^6 Hz
Unidentified DMR Signal		464.615 kHzKiloHertz (kHz) 10^3 Hz — 464.66 kHzKiloHertz (kHz) 10^3 Hz			21.17 kHzKiloHertz (kHz) 10^3 Hz		—
Unidentified Digital mode	Tetra sounding signal that i cant figure out	782.15 MHzMegaHertz (MHz) 10^6 Hz — 782.7 MHzMegaHertz (MHz) 10^6 Hz			50 kHzKiloHertz (kHz) 10^3 Hz		—
Unidentified FSK Signal	Unidentified FSKFrequency-Shift Keying signal at 450.994MHz, audio file on page. (Not sure how to edit wiki properly.)	450.994 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unidentified Player-Piano-Roll-Like Digital Signal	This signal can be found around 8, 10, and 14.8 MHzMegaHertz (MHz) 10^6 Hz. Resembles a player piano roll. Bandwidth varies but appears to be approximately 200 kHzKiloHertz (kHz) 10^3 Hz.	8 MHzMegaHertz (MHz) 10^6 Hz — 14.8 MHzMegaHertz (MHz) 10^6 Hz			200 kHzKiloHertz (kHz) 10^3 Hz		—
Unidentified Signal at 2.4 GHz	The signal works at 2.4 GHzGigaHertz (GHz) 10^9 Hz and the affected most of channels at 2.4 GHzGigaHertz (GHz) 10^9 Hz.There is always increase of SNR at various channels for Wi-FI signals. This Signal is modulated at low frequencies ( 30-100 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). ).	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unidentified Signal on UHF	Unidentified Signal on UHFUltra High Frequency (300-3000 MHz) Frequency	448.5 MHzMegaHertz (MHz) 10^6 Hz — 448.58 MHzMegaHertz (MHz) 10^6 Hz			448.5 MHzMegaHertz (MHz) 10^6 Hz — 448.58 MHzMegaHertz (MHz) 10^6 Hz
Unidentified Thing	Submitted on behalf of Aaronata. Not sure what this was supposed to be.
Unidentified digital signal on HF	digital noise	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).					Html5mediator: file extension not recognized
Unidentified signal (APRS-like)	This singnal is on air 24/7. Judging by existing records of frequency allocation, this belongs to a water company. Modulation unknown, so cannot decode and confirm.	149.1 MHzMegaHertz (MHz) 10^6 Hz			5.7 kHzKiloHertz (kHz) 10^3 Hz
Unidentified signal at 161.252 kHz	Signal at 161.252.000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). on 12 kHzKiloHertz (kHz) 10^3 Hz NFMNarrowband Frequency Modulation bandwidth. I think it's some sort of vessel communication system, because I live near the coast of Burgas, Bulgaria. I am not familiar with the decoding of this digital signal.	161.252 kHzKiloHertz (kHz) 10^3 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unidentified signal captured overlapping ch 16 marine emergency freq.	It looks like some kind of frequency hopping system, as the actual bandwidth is of about 50 kHzKiloHertz (kHz) 10^3 Hz but the central frequency is rapidly changing during transmission to cover about a total of 200 kHzKiloHertz (kHz) 10^3 Hz.	156.805 MHzMegaHertz (MHz) 10^6 Hz			200 kHzKiloHertz (kHz) 10^3 Hz		—
Unidientified (MFSK-13)	Unidentified 13 tone MFSKMultiple Frequency Shift-Keying signal, measures about 32 milliseconds per tone, looks like serdolik with less tones and slower. Possible russian diplomatic signal	4.871 MHzMegaHertz (MHz) 10^6 Hz			3.2 kHzKiloHertz (kHz) 10^3 Hz
Unindentified 438p838	Should be related to radiolocation services according to Croatia's signal allocations.	438.838 MHzMegaHertz (MHz) 10^6 Hz			7 kHzKiloHertz (kHz) 10^3 Hz
Unk Russian Intel 1	Sample from RadioScanner, supposed to be a variant of russian intel digimode testing, unsure of name/variant.
Unk Russian Intel 2	Sample from RadioScanner.RU, supposed to be a variant of russian intel digimode testing, unsure of name/variant. PSKPhase-Shift Keying variant
Unk Russian Intel 3	Sample from RadioScanner, supposed to be a variant of russian intel digimode testing, unsure of name/variant. Possibly poor recording quality, unique preamble intro. Considerable high frequency losses in recording.
Unk Russian Intel or Military lakisan	Sample from RadioScanner, supposed to be a variant of russian intel or military digimode, unsure of name/variant. lakisan not sure
Unk Russian Intel or Military ofdm	Sample from RadioScanner, supposed to be a variant of russian intel digimode, unsure of name/variant. Recorded by Karapuz supposedly.
Unk Russian Intel or Military СТРYНА OFDM	Sample from RadioScanner, supposed to be a variant of russian intel or military digimode testing, unsure of name/variant. Possibly recorded by KarapuZ, not sure where I got from.
Unknow 400MHz	remote sensor of home weather station?	400 MHzMegaHertz (MHz) 10^6 Hz					—
Unknow Happy new year and human voice	The radio with happy new year melody and human voice	27.11 kHzKiloHertz (kHz) 10^3 Hz — 27.113 kHzKiloHertz (kHz) 10^3 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknow Signal		3.831 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz			150px
Unknow signal lewis county Washington state	recording on a PDA off of a unshelded Mic line. also heard on the AMAmplitude Modulation radio band at random times. I have heard it on my car radio at 1000khz, 1420khz, 530khz and intercoms , PA systems over 33 miles apart.	1 MHzMegaHertz (MHz) 10^6 Hz						—
Unknown	Have seen this many times	3 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			2 MHzMegaHertz (MHz) 10^6 Hz		—
Unknown "whistle" signal on 49m broadcast band	Unknown whistling signal at 6065 khz	6.065 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown (V.29 fax machine) modem	This signal is used for the latter or if no message is being broadcasted. (Like Glenayre paging link, including other purposes.)	406 MHzMegaHertz (MHz) 10^6 Hz — 455 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unknown 07.077 MHz	Heard at the lower end of 40m, digital band. Tried to match with existing signals at this Wiki but none found.	7.077 MHzMegaHertz (MHz) 10^6 Hz			2 kHzKiloHertz (kHz) 10^3 Hz
Unknown 1	on going never ending, do not know what it is.	455 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 124 MHzMegaHertz (MHz) 10^6 Hz			9 kHzKiloHertz (kHz) 10^3 Hz
Unknown 139p024	Intermittent transmission in the 139.024MHz frequency. It also appeared near 137.915MHz and messed up my download from a NOAA satellite. It seems to be digital maybe? Most similar signal that I found was ACARS but this is not the correct frequency.	139.024 MHzMegaHertz (MHz) 10^6 Hz			16 kHzKiloHertz (kHz) 10^3 Hz
Unknown 139p650	Central Texas receiving location	139.65 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 14.522-ish	Unknown (possible radar) on HFHigh Frequency (3-30 MHz).	14.522 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown 142p398	Posting a unidendified sound. Sound like a MotoTrbo but chopped. Frequency hopping?	142.399 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unknown 14p219	What appears to be a FSKFrequency-Shift Keying / RTTYRadio TeleTYpe signal with unknown origin... Mark - Space @ 2100 - 1900 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). from centre frequency.	14.219 MHzMegaHertz (MHz) 10^6 Hz			200 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 151	Carrier repeats every 4 seconds, signal every 5 seconds. Received in New London County.	151.195 MHzMegaHertz (MHz) 10^6 Hz			6 kHzKiloHertz (kHz) 10^3 Hz
Unknown 154p4635		154 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			4 kHzKiloHertz (kHz) 10^3 Hz
Unknown 154p46375	Unknown Data type. Repeats every 20 Mins. Location of RXReceive: De Soto, Jefferson County, MO, 63020 Frequency Licensed to Wildwood Lake POA (Jefferson County).	154 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			12.5 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown 155p5	I have found an unknown signal at 155.500 Mhz in germany, Hameln near Hannover. This continuously signal has a bandwidth of 15 kHzKiloHertz (kHz) 10^3 Hz.	155.5 MHzMegaHertz (MHz) 10^6 Hz			15 kHzKiloHertz (kHz) 10^3 Hz
Unknown 155p6	I added the interesting signal's waterfall image and sound and I record it in Turkey, Central Anatolia. I hope it can be solved	155.6 MHzMegaHertz (MHz) 10^6 Hz
Unknown 158	I found this signal on 158.665 MHzMegaHertz (MHz) 10^6 Hz, which according to Industry Canada belongs to our local public works department.	158.665 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 161p995	Noisy signal from Italy.	161.995 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 163p075		163.075 MHzMegaHertz (MHz) 10^6 Hz
Unknown 164p3	Unknown Digital Signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. File: https://www.dropbox.com/s/tedffkrug9pkbu6/SDRSharp_20171031_182056Z_164373216Hz_IQ.7z?dl=1	164.3 MHzMegaHertz (MHz) 10^6 Hz			15 kHzKiloHertz (kHz) 10^3 Hz
Unknown 167	I've recieved this signal at 167,400MHz and recorded it as NFMNarrowband Frequency Modulation (Bandwidth 8000). Location: Madrid, Spain.	167.4 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unknown 168p900 MHz	Some digital signal. Seems to consist of a message and some kind of acknowledge from the receiver (?)	168.9 MHzMegaHertz (MHz) 10^6 Hz			25 kHzKiloHertz (kHz) 10^3 Hz
Unknown 171.651600 MHz	short pulses Possible solution: ACARS transmissions from/to aircraft Sound to me as a kind of SCADA	171.652 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
Unknown 172.212	this signal was picked-up in the south of France neer Spain. i was at ~50 km from Mediterranean sea and approximately the same distance from the Canigou mountain. my antenas are very small so i can tell that the signal was very strong.	172 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 212 MHzMegaHertz (MHz) 10^6 Hz			5 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 3 kHzKiloHertz (kHz) 10^3 Hz
Unknown 173		173.262 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 175p4968	I found this very slow frequency-modulated signal on 175.4968 MHzMegaHertz (MHz) 10^6 Hz. In Belgium, this part of the spectrum is allocated for wireless microphones and audio connections for broadcast services. It might also originate from the Netherlands, as I'm not living far from the border. Every few minutes, the signal shifts up about 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). for a while, before shifting back down.	175.497 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 18p880	Obviously not data, but likely something. My guess would be something like a buoy.	18.88 MHzMegaHertz (MHz) 10^6 Hz			2.7 MHzMegaHertz (MHz) 10^6 Hz
Unknown 19.07 MHz	Seen around 19 mhz. The signal sometimes has 3 beeps before pulses and has varying intensity.	19.6 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unknown 1p296	unknown noise or signal?	1.297 MHzMegaHertz (MHz) 10^6 Hz
Unknown 2.42 GHz	Captured on a HackRF, 2.42 GHzGigaHertz (GHz) 10^9 Hz band.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).					—
Unknown 218.800	This is coming from a wastewater management RTU manufactured by Data Flow Systems. Their systems can use communication protocols such as "Modbus ASCII, Modbus RTU, Modbus TCP/IPInternet protocol, Allen Bradley DF1 Serial, Seiscore, Uniface, Motorola Intrac, TAC II Serial, and TAC II TCP/IPInternet protocol." Unknown type of modulation.	218.8 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 220	Received in New London County.	220.914 MHzMegaHertz (MHz) 10^6 Hz			3 kHzKiloHertz (kHz) 10^3 Hz
Unknown 236p16		236.161 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unknown 256.235							—
Unknown 25kHz channel 800 MHz band	Strange 25 kHzKiloHertz (kHz) 10^3 Hz wide signal, possible trunking control or data.	850 MHzMegaHertz (MHz) 10^6 Hz			23 kHzKiloHertz (kHz) 10^3 Hz
Unknown 270p000	Sounds like maybe RTTYRadio TeleTYpe or CWContinuous Wave? But I don't notice long vs short tones, albeit the pitch of the tones changes.	270 MHzMegaHertz (MHz) 10^6 Hz			270 MHzMegaHertz (MHz) 10^6 Hz			—
Unknown 2m signal	Unknown digital signal in the 2m band at several different frequencies	156.9 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
Unknown 3p7875	Heard this 'digital' transmission on the amateur band and wondered what it was	3.788 MHzMegaHertz (MHz) 10^6 Hz			2.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 40	Hi,I found a strange signal on 40.693mhz, maybe you know what this is and/or could add this to your sample list. It has a bandwidth of about 4000-5000 hz and the low part repeats about every 2,5 seconds, the high part every 5 seconds (as shown in picture 1 rec1.png). Sometimes (2-3 times an hour) this signal has some variations - show in picture 2 rec2.png. I also provided you an audio sample of about 20 seconds, recorded in RAW. Do you know what this signal could be? Its online 24/7 since a month now. regards, Auge	409.6 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 40 2	Last Thursday I received some digital signals very close to each other that I have never heard before, it looked like this: http://i.imgur.com/00HQUs3.png and on NFMNarrowband Frequency Modulation it sounded like this: http://picosong.com/PAPC/.It appeared during sporadic E conditions and I heard a lot of people from the UK on the 50MHz band. It could very well be a signal originating from the UK, I received the signal in the south of The Netherlands.	40 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 40 3	Sounds like a ringing phone.	40.672 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 405p822	Obvious bursts, unknown modulation. Long burst heard every 5-10 seconds on average. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file in description. First thought is some kind of trunking, as it is very close to the band where trunking radio is usually seen.	405.822 MHzMegaHertz (MHz) 10^6 Hz			1.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 408p719	Ran rtl-433 analyzer mode over it, got some bitstream output	408.719 MHzMegaHertz (MHz) 10^6 Hz			24 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown 409	Unknown chirping like sound. Has BPSKBinary Phase-Shift Keying (1 bit per symbol) modulation, ~600 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.	409.6 MHzMegaHertz (MHz) 10^6 Hz
Unknown 410p0	IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. File & Another recording: https://drive.google.com/open?id=0B1Cfk2C-y-z7aGdmbDd5QVNfNTQ Note that I have no idea what mode to put this in, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) & LSBLower Side Band Modulation sounded the best, so that's what I used.	410 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 423p15	Unknown at 423.15 MHzMegaHertz (MHz) 10^6 Hz.	423.15 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown 425.904 MHz	Signal been captured around 2 years ago. And all time it has static frequency, power and data. I think, it maybe a radar, but not found any similar records there. If i go near to S.Petersburg, power of signal increases.	425.904 MHzMegaHertz (MHz) 10^6 Hz			25 kHzKiloHertz (kHz) 10^3 Hz
Unknown 433p120	I found a strange signal on 433.120MHz. Unfortunately I can not read it, so I'm sending it to you.	433.12 MHzMegaHertz (MHz) 10^6 Hz			433.12 MHzMegaHertz (MHz) 10^6 Hz
Unknown 433p219	Digital transmission of temperature and status of HOXTER fire-burning control ABRA 6.	433.219 MHzMegaHertz (MHz) 10^6 Hz					—
Unknown 434p050	Appears to be "hammering" (signal interrupted in regular intervals;see iq recording); signal constantly active.	434.05 MHzMegaHertz (MHz) 10^6 Hz			16 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown 434p450	Maybe FSKFrequency-Shift Keying modulation ? The transmission is continuous for at least 6-8mn but is not all time continuous (no burst). Earlier the same day i received the same signal on 434.425 MHzMegaHertz (MHz) 10^6 Hz	434.45 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 434p620	Posting on behalf of user IfoR. Possible key fob? no description was given.	434.62 MHzMegaHertz (MHz) 10^6 Hz
Unknown 435p150 Trunking	Please help identify this trunk							—
Unknown 441p660	Seems to have disappeared as of writing this edit. Croatian allocation tables point to it being radiolocation.	441.66 MHzMegaHertz (MHz) 10^6 Hz
Unknown 443p685	Most likely PMR or PAMR according to Croatia's frequency allocation table.	443.685 MHzMegaHertz (MHz) 10^6 Hz
Unknown 443p886		443.886 MHzMegaHertz (MHz) 10^6 Hz
Unknown 443p936		443.936 MHzMegaHertz (MHz) 10^6 Hz
Unknown 445	Unknown. Sent from video clip.	445.363 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 446	I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTYRadio TeleTYpe?). I'm attaching an image and a 2 seconds IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample.	446 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 449p936	Some sort of status check between two devices? IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file and detailed pic in the description.	449.936 MHzMegaHertz (MHz) 10^6 Hz			7.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 451p4500	Intermittent digital, and occasionally morse code, possibly trunked?	450 MHzMegaHertz (MHz) 10^6 Hz — 470 MHzMegaHertz (MHz) 10^6 Hz
Unknown 452p862		452.863 MHzMegaHertz (MHz) 10^6 Hz			1.99 kHzKiloHertz (kHz) 10^3 Hz
Unknown 455		455 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 458p208	Transmitted all the time at roughly 458.208 MHzMegaHertz (MHz) 10^6 Hz (center frequency), in four distinct frequencies separated by about 12.5 KHzKiloHertz (kHz) 10^3 Hz. Each of the signals is roughly 5 KHzKiloHertz (kHz) 10^3 Hz in bandwidth. The signals are received in Portugal near Lisbon.	458.208 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 462.125					12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 464.75 MHz	Common signal found throughout Michigan. Can have various rhythms. Did find out on KB9KUD that this type used for updating transmitter data...	460 MHzMegaHertz (MHz) 10^6 Hz — 940 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown 465p925 possible bus	Possible bus stop wireless system?	465.925 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown 465p97 MHz	Constantly transmitting Signal. Switches frequency. 465.97 MHzMegaHertz (MHz) 10^6 Hz, 466.23 MHzMegaHertz (MHz) 10^6 Hz and 466.075 MHzMegaHertz (MHz) 10^6 Hz	465.97 MHzMegaHertz (MHz) 10^6 Hz			25 kHzKiloHertz (kHz) 10^3 Hz
Unknown 467p260	Found at 467.260 MHzMegaHertz (MHz) 10^6 Hz. First thought to be packet radio but it isn't.	467.26 MHzMegaHertz (MHz) 10^6 Hz						—
Unknown 468p003	Message coded on 3 to 8 tones. Frequencies changing randomly. Transmitting continuousely	468 MHzMegaHertz (MHz) 10^6 Hz — 468.005 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 469	Found on 469.975 FMFrequency Modulation on my ICOM HT can't get waterfall cause I don't have my RTL-SDR here. When I'll have a better recording I'll send it. It sounds like the portable traffic lights but it not the same...	469.975 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
Unknown 47p980	I was browsing on my SDR when i found this weird signal. It sounds like radar	47.98 MHzMegaHertz (MHz) 10^6 Hz
Unknown 487p001		487.001 MHzMegaHertz (MHz) 10^6 Hz
Unknown 504p690	IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. FILE IN DESCRIPTION Signal which looks like a very wide 4MSK, but also has some tones to either side of the 4 main tones. Seen at 22:38 AEST, but not at 22:42 AEST.	504.625 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		—
Unknown 550	Unknown FSKFrequency-Shift Keying?	550.06 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 648	Frequency shifting. Received in New London County.	648.01 MHzMegaHertz (MHz) 10^6 Hz			300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 6p232		6.232 MHzMegaHertz (MHz) 10^6 Hz
Unknown 70.208.150		70.208 MHzMegaHertz (MHz) 10^6 Hz					—
Unknown 75p219	Croatian allocation tables point to it being aeronautical radionavigation. Appears every 10 seconds or so.	75.219 MHzMegaHertz (MHz) 10^6 Hz			16 kHzKiloHertz (kHz) 10^3 Hz
Unknown 78.815		78.815 kHzKiloHertz (kHz) 10^3 Hz			14 kHzKiloHertz (kHz) 10^3 Hz
Unknown 7p1076	Sounds like an OTHR, but very short bursts?	7.108 MHzMegaHertz (MHz) 10^6 Hz			2.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 7p585	Possibly OTHOver The Horizon (very long range) radar.	7.585 MHzMegaHertz (MHz) 10^6 Hz			9 kHzKiloHertz (kHz) 10^3 Hz
Unknown 8 kHz	This signal occurs many times in a day, at irregular intervals. The shape is always the same, but the length of the center line can vary.	8 kHzKiloHertz (kHz) 10^3 Hz			300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 83	Unknown	83.7 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 855p537 Chirp	Chirp. Possible FSKFrequency-Shift Keying. No other information. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file provided.	855.537 MHzMegaHertz (MHz) 10^6 Hz			3 kHzKiloHertz (kHz) 10^3 Hz
Unknown 856	The antenna has a Yagi pointed to West from 23.5° South latitude, 47.46° West longitude. The signal can be local or from the sky. The signal is horizontal polarized.	856 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		—
Unknown 858p9	Found on 858.9538MHz and 859.0544MHz. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. ZIP in description.	858.954 MHzMegaHertz (MHz) 10^6 Hz — 859.054 MHzMegaHertz (MHz) 10^6 Hz			12 MHzMegaHertz (MHz) 10^6 Hz
Unknown 85p4748	I can see the exact same signal with RTL-SDR, HackRF, Airspy, with different computers, so I am ruling out a birdie. The break every 6 seconds is what makes this signal stand out, as something oddball.	85.475 MHzMegaHertz (MHz) 10^6 Hz			7 kHzKiloHertz (kHz) 10^3 Hz
Unknown 86p137	This signal is emitted constantly every 5 seconds approximately. The power varies constantly.	86.137 MHzMegaHertz (MHz) 10^6 Hz			30 kHzKiloHertz (kHz) 10^3 Hz
Unknown 877p5	Possibly a 3G WCDMA signal, although a bit wider than expected.	887.6 MHzMegaHertz (MHz) 10^6 Hz			5 MHzMegaHertz (MHz) 10^6 Hz		—
Unknown 940.113	Found in Southern Maryland, 30 minutes from Washington, DC	940.113 MHzMegaHertz (MHz) 10^6 Hz			17.1 kHzKiloHertz (kHz) 10^3 Hz
Unknown 941p33		941.33 MHzMegaHertz (MHz) 10^6 Hz			12.5 MHzMegaHertz (MHz) 10^6 Hz
Unknown 960.825 - 960.850	Unknown Signal, no idea what it could be	906 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			25 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown @73.728 Mhz	Received on Funcube Pro+ with standard VHFVery High Frequency (30-300 MHz) TV antenna pointing due West. Sound is on 73.7267 MHzMegaHertz (MHz) 10^6 Hz and does not vary over time.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			10.07 kHzKiloHertz (kHz) 10^3 Hz		No Audio File
Unknown Chirping 2	Continuous bursts. Audio sample recorded in NFMNarrowband Frequency Modulation. Comment: Transmitted by a company that has water purifiers near my city. I know because i’ve done 2 stages in this company and i’ve seen the radio. It should recive the water level from the tanks and other things.	162.863 MHzMegaHertz (MHz) 10^6 Hz — 936 MHzMegaHertz (MHz) 10^6 Hz
Unknown DMR Signal	an unidentified DMR signal , transmitting continously with nearly constant intervals , each cycle is around one second , DSD+ shows it as Tier3(TIII) but no sound even when there is an acvtivity , the signal is not encrypted	450.175 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown Data Chirping	Continuous signal. Audio sample recorded in NFMNarrowband Frequency Modulation.	152.652 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown Data Transmission	Unable to identify this transmission. It was found in Hawaiian airspace operating on band reserved for military transmissions. Some sort of FSKFrequency-Shift Keying? Bears resemblance to Unknown 707.	375 MHzMegaHertz (MHz) 10^6 Hz			2 kHzKiloHertz (kHz) 10^3 Hz
Unknown FSK 434.325M		434.325 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown FSK Blips	I see what looks like some sort of AFSKAudio Frequency-Shift Keying all over 454MHz (looks like several channels of it). Most of the time it's the short bursts as can be seen in the waterfall, but occasionally it breaks out into a much longer ramble. It also sounds as though the carrier drifts up and down a bit during these longer bursts. In AMAmplitude Modulation or FMFrequency Modulation, it just sounds like someone keying a mic every second, but on sideband it sounds much more interesting, like the attached file. Cheers	454 MHzMegaHertz (MHz) 10^6 Hz
Unknown Ham Signal	All found on the 20m band. Radio frequency's are 14.109, 14.166, 14.224, and 14.340. I'm in the Los Angeles, California area.	14.109 MHzMegaHertz (MHz) 10^6 Hz — 14.34 MHzMegaHertz (MHz) 10^6 Hz
Unknown Heli	Submitted on behalf of Willone2. Some sweeper	6.31 MHzMegaHertz (MHz) 10^6 Hz
Unknown Helix	Helix shape possibly due to under sampling in the waterfall display?	456.368 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown Link Establishment? 14.125MHz USB	Pics and audio here: https://drive.google.com/file/d/1ypAtYGSN2OU4BaXO23GxaCSh5KCksxP4/view?usp=sharing Found while looking at an OTHR. Seems like some kind of link establishment protocol	14.125 MHzMegaHertz (MHz) 10^6 Hz			3 kHzKiloHertz (kHz) 10^3 Hz		—	—
Unknown MFSK on 128KHz	A very strong MFSKMultiple Frequency Shift-Keying-like signal	118 kHzKiloHertz (kHz) 10^3 Hz — 128 kHzKiloHertz (kHz) 10^3 Hz			16 kHzKiloHertz (kHz) 10^3 Hz
Unknown Marine Band 157.740		157.74 MHzMegaHertz (MHz) 10^6 Hz, 157.74 MHzMegaHertz (MHz) 10^6 Hz					—	—
Unknown NFM Squelch system	Very low hum, not a constant tone. Repeating pulses, and pulses seem to differ between different NFMNarrowband Frequency Modulation channels of the system being used. Possible squelching, XTCSS?	855.112 MHzMegaHertz (MHz) 10^6 Hz — 855.362 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown Numbers Station 4p723	Numbers station heard 12:26 AMAmplitude Modulation AEST on 2015-01-19. Delivers a stream of numbers and letters in phonetics. Begins with "All stations, all stations, this is ?". Finishes with "This is ? out". Cannot hear it myself - anyone else have better ears?	4.723 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz
Unknown Out of Band ISM	'Out of Band (Australia)' Unidentified digital wideband signal seems to have origins in the US ISM band - Shouldn't be below 915MHz Downunder!	900 MHzMegaHertz (MHz) 10^6 Hz			10 MHzMegaHertz (MHz) 10^6 Hz		—
Unknown P25 simulcast or other trunking channel	Sounds very similar to P25 except the beginning and ending preambles sound more like the RD-LAP type signal I posted here not too long ago.	170.275 MHzMegaHertz (MHz) 10^6 Hz — 170.675 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unknown Pager	Sounds like a pager system	471.688 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown Pear	Here was a pear shape happened 3 times tonight.Sorry to say I didn`t get the audio. I was lucky to get 2 images.						—
Unknown Pulse Tones - 3012.001 MHz	2019-06-14 01:02 UTC Detected several pulse tones from an unknown signal in SHF range 3011.999 to 3012.001 MHzMegaHertz (MHz) 10^6 Hz. Captured signal via HackRF located in San Antonio, Texas, United States.	3,011.999 MHzMegaHertz (MHz) 10^6 Hz — 3,012.001 MHzMegaHertz (MHz) 10^6 Hz			2.4 kHzKiloHertz (kHz) 10^3 Hz
Unknown Pulsing	Periodic pulses. Sound sample recorded in USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) mode. Possibly a GlobeWireless signal.	6 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown Pulsing Signal	An overpowering signal at 149.5mhz in North Potomac, Maryland, USA	149 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			150 MHzMegaHertz (MHz) 10^6 Hz
Unknown Pulsing Sound		462 MHzMegaHertz (MHz) 10^6 Hz			5 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
Unknown Pulsing Type of Signal		7.404 kHzKiloHertz (kHz) 10^3 Hz — 7.438 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown RADAR Near Toronto Canada	I found this RADAR signal in the expected band, however all other nearby RADAR units were already identified. This one is unknown, and uses a novel inter-pulse modulation scheme and seemingly random or pseudo-random pulse train and pulse coding.	1,350 MHzMegaHertz (MHz) 10^6 Hz			2 MHzMegaHertz (MHz) 10^6 Hz
Unknown Radar	I often see this signal, and it lasts for literal hours. It sounds very similar to a microwave running, and looks as if Kontayner had a little brother. It's a strong signal, but not as strong as the PLUTO radar.	4.41 MHzMegaHertz (MHz) 10^6 Hz			7 kHzKiloHertz (kHz) 10^3 Hz
Unknown Ringing	Repeats every minute.	154.646 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown SELCAL-like signal	unknown selcal-like signal, suspected military usage. Has similar format to Selcal but there is no 200ms gap between the two groups, and the first group lasts ~1260 msmilliseconds (.001 of a second). the second group lasts 1 second proper. possible variant?	8.989 MHzMegaHertz (MHz) 10^6 Hz
Unknown Signal	Unknown signal in Yangon Region at Yangon(Burma).	363.007 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown Signal 433p5MHz	The signal repeatedly appeared and disappeared ever few minutes. It might be from a mixer trucke, that was in front of my window.	433.5 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
Unknown Signal 940.863 MHz	Digital BOS Radio system transmissions from Germany.	940.863 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown Signal @ 940.113.970 MHz	Found fairly close to the other one I found, I'm going to say that this is probably some type of pager	940.113 MHzMegaHertz (MHz) 10^6 Hz			22.28 kHzKiloHertz (kHz) 10^3 Hz
Unknown Signal at 695 MHz	Please find signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file at : https://1drv.ms/u/s!AvlNmSqrGlNVgWol9WapK9zRMIJu	695 MHzMegaHertz (MHz) 10^6 Hz					—	—
Unknown Signal at 7443 mhz	unknown signal sounds like spaceship	7.443 kHzKiloHertz (kHz) 10^3 Hz			2 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown Telemetry		465.188 MHzMegaHertz (MHz) 10^6 Hz			12.5 MHzMegaHertz (MHz) 10^6 Hz
Unknown Thin Pulsing	Unknown thin pulses.	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown Ticking		868.33 MHzMegaHertz (MHz) 10^6 Hz					—
Unknown Trunking	Sounds like Motorola Type II smartnet, but Unitrunker does not recognize.	452.325 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown Trunking or Telemetry	Control channel for a logic trunked radio system.	148 MHzMegaHertz (MHz) 10^6 Hz — 170 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unknown UHF Satcom Signal	So I've come across this signal twice now - the first time I assumed it might've been an anomaly however it's popped up again and this time stronger and with similar signals nearby. I've seen it between 250 and 270 MHzMegaHertz (MHz) 10^6 Hz on it's own and next to the same type of signal but with different "waves" in the transmission. It sits right next to the classic UHFUltra High Frequency (300-3000 MHz) satcom signals however this one has obvious differences. Unsure what modulation it is. The first thing I thought of was some kind of radar but I don't know of any in this band.	251 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			30 kHzKiloHertz (kHz) 10^3 Hz
Unknown UHF in SARSAT Band		406.05 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown VHF burst	This is a signal I couldn't identify. I got two bursts and took away the noise between them in Audacity so they'd play back-to-back.	159.18 MHzMegaHertz (MHz) 10^6 Hz
Unknown at 164.650MHz	Possibly some kind of radio trunking.	164.65 MHzMegaHertz (MHz) 10^6 Hz			5 kHzKiloHertz (kHz) 10^3 Hz
Unknown blips 447p325	Always active, seems to come from multiple sources as blips. Telemetry of some sort?	447.325 MHzMegaHertz (MHz) 10^6 Hz			20 kHzKiloHertz (kHz) 10^3 Hz
Unknown chirps	lot of tone chirps 750 MHzMegaHertz (MHz) 10^6 Hz. submitted by user Mitchy93	750 MHzMegaHertz (MHz) 10^6 Hz			15 kHzKiloHertz (kHz) 10^3 Hz
Unknown codar	This signals looks and sounds exactly like CODAR. It has a higher sweep rate than the one on 13500kHz	26.2 MHzMegaHertz (MHz) 10^6 Hz			150 kHzKiloHertz (kHz) 10^3 Hz		—
Unknown digi mode	An unknown digital mode consisting of maybe PSKPhase-Shift Keying and freq hopping FSKFrequency-Shift Keying bursts within the signal. No one at the moment know what it is. Went off the air around 21:45 UTC on 8/14/17. further observation concludes that it might be on a steady schedule. Don't know when it first went on air. ( MORE UPDATES IN THE PAGE)	6.903 kHzKiloHertz (kHz) 10^3 Hz — 11.017 MHzMegaHertz (MHz) 10^6 Hz			3.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown digital 461p185		461.185 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown digital signal in italy		446.524 MHzMegaHertz (MHz) 10^6 Hz — 447.275 MHzMegaHertz (MHz) 10^6 Hz					—	150px
Unknown lf strong signal		82 kHzKiloHertz (kHz) 10^3 Hz			1 kHzKiloHertz (kHz) 10^3 Hz
Unknown marine VHF 161.300	Sounds like FSKFrequency-Shift Keying every minute in marine VHFVery High Frequency (30-300 MHz) band near north west coast of France	161.3 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unknown military airwaves signal 334.520 MHz	Observed and recorded 23 June 2022 02:00-03:00 PST (23 June 2022 09:00-10:00 UTC)	334.52 MHzMegaHertz (MHz) 10^6 Hz			4 kHzKiloHertz (kHz) 10^3 Hz
Unknown modulating carrier and sidebands	Pulsing signal at 228 MHzMegaHertz (MHz) 10^6 Hz, with sidebands spaced at 22.75 kHzKiloHertz (kHz) 10^3 Hz. Carrier appears to pulse at ~1.33 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			140 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown moving signal	i dont know what is this,its moving to another frequencies slowly, so i can follow the signal, sometimes its weak becouse im changing my antenna position for better results, signal is being really strong if i change antenna's position to moon(i know this signal cant came from moon, and i hope)i dont know the frequency range becouse i closed app while receiving i dont wanted to listen whole signal(start:2750kHz stop:i dont know but i think 5MHz or little bit more)	2.75 MHzMegaHertz (MHz) 10^6 Hz			2.8 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown noise signal in 19m broadcast band	Strange noisy signal on 19 meter broadcast band	15.16 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown paging 940p862	Unknown paging signal, similar to FLEX in preamble tone but doesnt decode as FLEX. 1600Bd, possible PSKPhase-Shift Keying.	940.862 MHzMegaHertz (MHz) 10^6 Hz			12 kHzKiloHertz (kHz) 10^3 Hz
Unknown pulses	Hi. an unknown irregular pulses transmitting on 36.941 Mhz 24/7. Received by a RTL-SDR and a simple 10 meter long wire. signal is powerful all the time.	36.941 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown radar or data	(see page for sound samples) Mystery solved, this is a Chinese Mulitonal Jammer.	9.045 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown signal	I discovered this signal while I had an old 9-element directional TV antenna connected to my RTL-SDR dongle to experiment with, and I received this really strong signal when I pointed it 10 degrees north and elevated it 35 degrees. I'm not sure if this is some sort of satellite facsimile frequency or what, is there somebody who knows what this could be?	463.95 MHzMegaHertz (MHz) 10^6 Hz			8.45 kHzKiloHertz (kHz) 10^3 Hz			—
Unknown signal at 444p019143	I'm new to radio and I've just found this signal. There are a few similar other signals around this one.	444.019 MHzMegaHertz (MHz) 10^6 Hz			6 kHzKiloHertz (kHz) 10^3 Hz
Unknown signal between 424.000MHz and 425.000MHz	Unknown signal in Belgium between 424 and 425MHz. Permanent data stream.	424.513 MHzMegaHertz (MHz) 10^6 Hz — 424.8 MHzMegaHertz (MHz) 10^6 Hz			15 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown signal on 145.600 MHz		145.6 MHzMegaHertz (MHz) 10^6 Hz			1 kHzKiloHertz (kHz) 10^3 Hz		—	—
Unknown signal via 464.6 MHz	This is actually a time signal listed to a time code company in GR but the form of modulation is confusing....	464.6 MHzMegaHertz (MHz) 10^6 Hz			5.4 kHzKiloHertz (kHz) 10^3 Hz
Unknown tone on MURS 154.600	Unknown tones appearing on MURS 154.6000MHz. Numerous videos and a post on RadioReference.com show listeners in different parts of the country have also heard the same tone on the same frequency.	154.6 MHzMegaHertz (MHz) 10^6 Hz
Unknown tone on MURS 154.600	Unknown tones appearing on MURS 154.6000MHz. Numerous videos and a post on RadioReference.com show listeners in different parts of the country have also heard the same tone on the same frequency.	154.6 MHzMegaHertz (MHz) 10^6 Hz
Unknown trnking	unknown trunking channel signal	173 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz
Unknown trunk	Unidentified (Police?) trunked radio signal in Santa Rosa, CA				0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).		No Audio File	150px
Unknown trunking or data	Unidentified data signal, possibly trunking	131.188 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown-1536125	This signal continuously broadcasts in short blips.	151.782 MHzMegaHertz (MHz) 10^6 Hz — 469.761 MHzMegaHertz (MHz) 10^6 Hz			10 kHzKiloHertz (kHz) 10^3 Hz
Unknown-162	Signal was captured in Belarus(near Russia border). It is emitting everytime. Maybe this is airport signals...	162.3 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown72p00Mhz	A repeating short data transmission.	72 MHzMegaHertz (MHz) 10^6 Hz — 72.36 MHzMegaHertz (MHz) 10^6 Hz			8 kHzKiloHertz (kHz) 10^3 Hz			—
Unkown 0p012	Unknown VLFVery Low Frequency (3-30 kHz) signal ~12.5 kHzKiloHertz (kHz) 10^3 Hz. Interference every 10-30 minutes: 2-3 ~12.5 KHzKiloHertz (kHz) 10^3 Hz tones, separated by approximately a second.	12.5 kHzKiloHertz (kHz) 10^3 Hz			24 kHzKiloHertz (kHz) 10^3 Hz
Unkown 156p00	I think this is a pager signal, but would like to know what type of signal it is please	156 MHzMegaHertz (MHz) 10^6 Hz			0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).			—
Unkown 707p999 FSK		707.999 MHzMegaHertz (MHz) 10^6 Hz			11 kHzKiloHertz (kHz) 10^3 Hz		—
Unkown Periodic Signal	Unknown periodic signal around 94.5 kHzKiloHertz (kHz) 10^3 Hz	94.5 kHzKiloHertz (kHz) 10^3 Hz			500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unkown Periodic Signal	Unknown periodic signal around 94.5 kHzKiloHertz (kHz) 10^3 Hz	94.5 kHzKiloHertz (kHz) 10^3 Hz			500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unkown patteren at 434.750 MHz	signal seems to be in some sort of patteren but it's isn't regular sometimes it stops and continues again after a while. while it pauses you can also faintly hear another signal at the smae time. the audio recorded was in RAW mode	434.75 MHzMegaHertz (MHz) 10^6 Hz
VC02 voice Morse code station	Chinese VC02 voice Morse code station. This station transmits voice Morse code messages by vocalizing the "dits" and "dahs."	9.962 MHzMegaHertz (MHz) 10^6 Hz
Very weird signal in the VHF band	Found this extremely odd, almost constant signal in the VHFVery High Frequency (30-300 MHz) band next to the fire/police dispatch channels. Dont know the purpose, or protocol at all.	151.01 MHzMegaHertz (MHz) 10^6 Hz			6.7 kHzKiloHertz (kHz) 10^3 Hz
WLAN Interfering with Bluetooth	A WLAN signal interfering with a Bluetooth signal.						—	—
WOMEX	Found on the 20 meter amateur band in Hayward, CA as seen on an ICOM 7300	14.15 MHzMegaHertz (MHz) 10^6 Hz			2 kHzKiloHertz (kHz) 10^3 Hz		—
Water Tower Com to water pumps	Telemetry data for water pumps & water towers for water distribution.	447.238 MHzMegaHertz (MHz) 10^6 Hz — 457.438 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz
Water plant telemetry	It is received all over Hungary, on many frequencies in the given range. Some of them are simplex, some half-duplex. It's telemetry from water plants/pumps/etc. They are working with 10 or 10+ element yagi antennas.	440 MHzMegaHertz (MHz) 10^6 Hz — 460 MHzMegaHertz (MHz) 10^6 Hz			12 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 5 kHzKiloHertz (kHz) 10^3 Hz
Weird Signal at 6912.43	This looked like a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). signal but when I went to investigate further it sounded like a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). on LSD.	6.912 kHzKiloHertz (kHz) 10^3 Hz
Weird Signal on Multiple Frequencies	For some reason I've been scanning frequencies and this has come up on about 10 of them. Anyone know what this is?	0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).						[[Image:|150px]]
Weird moving signal	Found this signal while just scanning around. Original thought it could be something to do with the local airport, such as radar or something. But this signal has only appeared in the last couple of days.	117 MHzMegaHertz (MHz) 10^6 Hz			3 kHzKiloHertz (kHz) 10^3 Hz		—
Weird pulsing	Just found this while i was looking through a WebSDR (http://websdr.ewi.utwente.nl:8901)	13.55 MHzMegaHertz (MHz) 10^6 Hz
Weird signal on 10321.5 khz					2.5 kHzKiloHertz (kHz) 10^3 Hz
Weird signal on military frequency	I found this weird signal, bouncing around the frequency. Anyone know what this is?	232.56 MHzMegaHertz (MHz) 10^6 Hz					—
Weird spikes	Odd spikes found when scanning	888 MHzMegaHertz (MHz) 10^6 Hz — 893 MHzMegaHertz (MHz) 10^6 Hz			24.5 kHzKiloHertz (kHz) 10^3 Hz			150px
Wide signal at 443.5 MHz		443.5 MHzMegaHertz (MHz) 10^6 Hz			125 kHzKiloHertz (kHz) 10^3 Hz		—
Wide signal unknown modulation	Wide short, sometimes long burst of modem noise.	152.48 MHzMegaHertz (MHz) 10^6 Hz			12.5 kHzKiloHertz (kHz) 10^3 Hz — 2 MHzMegaHertz (MHz) 10^6 Hz
Wideband noise centred on 14030kHz	Wideband noise, 15dB above usual noise floor, centred on 14.030 MHzMegaHertz (MHz) 10^6 Hz and repeated every 400 kHzKiloHertz (kHz) 10^3 Hz for dozens of MHzMegaHertz (MHz) 10^6 Hz either side of main signal. It is there 24/7 and only received when antenna connected to SDR .	14.03 MHzMegaHertz (MHz) 10^6 Hz			30 kHzKiloHertz (kHz) 10^3 Hz

List of Unknown Signals in Database

• (RTTY?)
• 10.730 Mhz
• 145.870MHz
• 147 Mhz burst type data
• 158.430.000 mhz
• 160.282.000 in Berlin, Germany
• 170 Hz Carriers at 70 MHz
• 184.320 MHz Unknown, Crystal Ocillator?
• 2021-05-01T16 37 56Z 27105p00kHz
• 236 MHZ pulses
• 260,722 MHz
• 2740 MHz - US Weather Radar - WSR-88D???
• 3790KHz unidentified signal
• 3905 Khz
• 3985 kHz
• 40M pulsing spark gap lijke QRN every night continuing until daylight
• 421.850 during Tour de France
• 433p90
• 433p920
• 444, 275 MHz
• 479.999 Uknown Beeping Signal
• 80 Meter Unknown
• 863p151p150
• 869.525
• ?? satellite maybe?
• A bunch of alternating tones..
• AM signal
• Anomalous Russian signal
• BBC Radio on 70m ?
• Beeping
• Beeping morse-like signal found on 599p99 MHz
• Bermuda 460.100MHz
• Bird Signal
• Bird Song Oddity
• Bonaire
• Broadcast FM Whistling
• C4FM modulation + DSD
• CTCSS Alone
• Canada 155.325
• Constant Stream
• Constant beeping sound
• Constantly repeating signal
• Continu signal on 423Mhz since today 20/01/21
• Continuous chirping
• Continuously signal on 424.493Mhz
• DNA-like shifting frequencies signal
• Digital SSTV?
• Digital code in UHF
• Dot Signal
• Dupliate of MPT1327
• Electronic bagpipes
• Errant Signal on 2m Ham Band
• Exotic Cipher
• FRN Gateway Data 27Mhz unid
• FSK Data Rollercoaster
• FSK Signal
• FSK?
• Found in Kings Beach,CA near 315mhz
• Frequency Drifting Data Transmission

• Gas Meter Signal?
• Generator Signal
• Giant Band of Signal
• Ham Band Interference
• I am constantly geting this wave
• Is this Packet
• K3UU-Unknown
• MFSK in middle of tetra band
• Maritime Public Safety Radio Network P25
• Maybe XF faders
• Mistery HF Signal seen on a Web Sdr radio
• NOAA APT Oddity
• New possible Russian Digimode
• Nknown 472p875
• Noise on 160m
• Noise on HF HAM Bands from 0 to 30 Mhz
• Noise over all HF bands
• Noise-like signal
• Non lo so
• Odd Multi Tone signal, might be a remote control.
• Odd Signal
• Odd signal
• Oddity AM
• One of many signals near 877 MHz
• One with squelch
• Over the Horizon Radar
• Periodic Signal - Potentially Police Related
• Police Idling Walkie Talkie Radio Signal
• Possible Russian Marker 'Airhorn' 4020kHz
• Possible Telemetry GFSK signal on 220Mhz
• Possible low level wind shear alert system
• Possible weather station sensor on air band
• Possibly a RADAR
• Potential Radar
• Pulsar on 33.0005 GHz
• Pulsing Digital Signal
• Pulsing interference in ISM band
• RF signal modulate at low frequency
• Radiomodem 423 875
• Repeated Signal
• Repeated Tone
• Repeated across HF
• Repeating signal 404MHz
• Rezonans-N type radar
• SBK Radio
• Same signal from unknow source
• Short PSK or AFSK pulses at 461.025
• Signal inconnue
• Signal that is moving down
• Similar to XPB polytone
• Single Tone
• Sliding tone
• Solved. Is a DRM Transmitter
• Some Sort of Packet ?
• Some Sort of Packet?
• Some kind of MOBITEX
• Sonde type id
• Sounds like a pager
• Squiggling oddity

• Strange Musical Repeating Tone - 945.716 MHz
• Strange Noise Around 889mhz
• Strange Signal
• Strange beeps at 1.2ghz
• Strange signal starst at 13388-13640 khz
• Strange unknown signal on 423.550 mhz
• Strong HF signal
• Strong UNID Horn-like signal
• UNID Bursts
• UNID RUSSIA USB 6 8 2019 1605Z
• UNID Telemetry
• UNID Telemetry, pulsing
• UNID microwave sounding signal 12 MHz
• UNID telemetry/paging bursts
• UNKNOWN 10p140
• UNKNOWN 9.170 MHZ
• UnId2LongIsland
• UnIdEastEurope
• Unid 4-FSK
• Unid ISM 900MHz
• Unid Low VHF
• Unid analogue signal - ecg like
• Unidentified 406p214
• Unidentified 433Mhz Oscillating Signal
• Unidentified 466 MHz digital signal
• Unidentified 5066p3kHz signal
• Unidentified 959.85MHz
• Unidentified Bus Timetable Data
• Unidentified DMR Signal
• Unidentified Digital mode
• Unidentified FSK Signal
• Unidentified Player-Piano-Roll-Like Digital Signal
• Unidentified Signal at 2.4 GHz
• Unidentified Signal on UHF
• Unidentified Thing
• Unidentified digital signal on HF
• Unidentified signal (APRS-like)
• Unidentified signal at 161.252 kHz
• Unidentified signal captured overlapping ch 16 marine emergency freq.
• Unidientified (MFSK-13)
• Unindentified 438p838
• Unk Russian Intel 1
• Unk Russian Intel 2
• Unk Russian Intel 3
• Unk Russian Intel or Military lakisan
• Unk Russian Intel or Military ofdm
• Unk Russian Intel or Military СТРYНА OFDM
• Unknow 400MHz
• Unknow Happy new year and human voice
• Unknow Signal
• Unknow signal lewis county Washington state
• Unknown
• Unknown "whistle" signal on 49m broadcast band
• Unknown (V.29 fax machine) modem
• Unknown 07.077 MHz
• Unknown 1
• Unknown 139p024
• Unknown 139p650
• Unknown 14.522-ish

• Unknown 142p398
• Unknown 14p219
• Unknown 151
• Unknown 154p4635
• Unknown 154p46375
• Unknown 155p5
• Unknown 155p6
• Unknown 158
• Unknown 161p995
• Unknown 163p075
• Unknown 164p3
• Unknown 167
• Unknown 168p900 MHz
• Unknown 171.651600 MHz
• Unknown 172.212
• Unknown 173
• Unknown 175p4968
• Unknown 18p880
• Unknown 19.07 MHz
• Unknown 1p296
• Unknown 2.42 GHz
• Unknown 218.800
• Unknown 220
• Unknown 236p16
• Unknown 256.235
• Unknown 25kHz channel 800 MHz band
• Unknown 270p000
• Unknown 2m signal
• Unknown 3p7875
• Unknown 40
• Unknown 40 2
• Unknown 40 3
• Unknown 405p822
• Unknown 408p719
• Unknown 409
• Unknown 410p0
• Unknown 423p15
• Unknown 425.904 MHz
• Unknown 433p120
• Unknown 433p219
• Unknown 434p050
• Unknown 434p450
• Unknown 434p620
• Unknown 435p150 Trunking
• Unknown 441p660
• Unknown 443p685
• Unknown 443p886
• Unknown 443p936
• Unknown 445
• Unknown 446
• Unknown 449p936
• Unknown 451p4500
• Unknown 452p862
• Unknown 455
• Unknown 458p208
• Unknown 462.125
• Unknown 464.75 MHz
• Unknown 465p925 possible bus
• Unknown 465p97 MHz

• Unknown 467p260
• Unknown 468p003
• Unknown 469
• Unknown 47p980
• Unknown 487p001
• Unknown 504p690
• Unknown 550
• Unknown 648
• Unknown 6p232
• Unknown 70.208.150
• Unknown 75p219
• Unknown 78.815
• Unknown 7p1076
• Unknown 7p585
• Unknown 8 kHz
• Unknown 83
• Unknown 855p537 Chirp
• Unknown 856
• Unknown 858p9
• Unknown 85p4748
• Unknown 86p137
• Unknown 877p5
• Unknown 940.113
• Unknown 941p33
• Unknown 960.825 - 960.850
• Unknown @73.728 Mhz
• Unknown Chirping 2
• Unknown DMR Signal
• Unknown Data Chirping
• Unknown Data Transmission
• Unknown FSK 434.325M
• Unknown FSK Blips
• Unknown Ham Signal
• Unknown Heli
• Unknown Helix
• Unknown Link Establishment? 14.125MHz USB
• Unknown MFSK on 128KHz
• Unknown Marine Band 157.740
• Unknown NFM Squelch system
• Unknown Numbers Station 4p723
• Unknown Out of Band ISM
• Unknown P25 simulcast or other trunking channel
• Unknown Pager
• Unknown Pear
• Unknown Pulse Tones - 3012.001 MHz
• Unknown Pulsing
• Unknown Pulsing Signal
• Unknown Pulsing Sound
• Unknown Pulsing Type of Signal
• Unknown RADAR Near Toronto Canada
• Unknown Radar
• Unknown Ringing
• Unknown SELCAL-like signal
• Unknown Signal
• Unknown Signal 433p5MHz
• Unknown Signal 940.863 MHz
• Unknown Signal @ 940.113.970 MHz
• Unknown Signal at 695 MHz
• Unknown Signal at 7443 mhz

• Unknown Telemetry
• Unknown Thin Pulsing
• Unknown Ticking
• Unknown Trunking
• Unknown Trunking or Telemetry
• Unknown UHF Satcom Signal
• Unknown UHF in SARSAT Band
• Unknown VHF burst
• Unknown at 164.650MHz
• Unknown blips 447p325
• Unknown chirps
• Unknown codar
• Unknown digi mode
• Unknown digital 461p185
• Unknown digital signal in italy
• Unknown lf strong signal
• Unknown marine VHF 161.300
• Unknown military airwaves signal 334.520 MHz
• Unknown modulating carrier and sidebands
• Unknown moving signal
• Unknown noise signal in 19m broadcast band
• Unknown paging 940p862
• Unknown pulses
• Unknown radar or data
• Unknown signal
• Unknown signal at 444p019143
• Unknown signal between 424.000MHz and 425.000MHz
• Unknown signal on 145.600 MHz
• Unknown signal via 464.6 MHz
• Unknown tone on MURS 154.600
• Unknown tone on MURS 154.600
• Unknown trnking
• Unknown trunk
• Unknown trunking or data
• Unknown-1536125
• Unknown-162
• Unknown72p00Mhz
• Unkown 0p012
• Unkown 156p00
• Unkown 707p999 FSK
• Unkown Periodic Signal
• Unkown Periodic Signal
• Unkown patteren at 434.750 MHz
• VC02 voice Morse code station
• Very weird signal in the VHF band
• WLAN Interfering with Bluetooth
• WOMEX
• Water Tower Com to water pumps
• Water plant telemetry
• Weird Signal at 6912.43
• Weird Signal on Multiple Frequencies
• Weird moving signal
• Weird pulsing
• Weird signal on 10321.5 khz
• Weird signal on military frequency
• Weird spikes
• Wide signal at 443.5 MHz
• Wide signal unknown modulation
• Wideband noise centred on 14030kHz

Comments

Feel free to make comments about unidentified signals that you might know or anything else here.

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Linkz

3005 days ago

Score 1

Hello guys I solved some unid HFHigh Frequency (3-30 MHz) signals of the DB today:

Unknown 6-channel VFTVoice Frequency Telegraphy = overmodulated US-MIL RATT

Unknow 13p559 = frequency of the ISM band, random industrial QRM, impossible to identify as its QRM only

Unidentified 13p045 kHzKiloHertz (kHz) 10^3 Hz = CISCommonwealth of Independent States (CIS), the former Soviet Republic-12 (mistuned)

Unknown CISCommonwealth of Independent States (CIS), the former Soviet Republic PSKPhase-Shift Keying = Russian INTEL psk

Regards

linkz

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Cartoonman

3002 days ago

Score 0

Thanks for the ids! I'm a little busy currently but i'll incorporate your changes into the signals as soon as I get a chance!

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Linkz

2971 days ago

Score 0

Hi,

FSKFrequency-Shift Keying Beacon on HFHigh Frequency (3-30 MHz)?? = Chinese MIL datalink Unid psk signal narrowband = Australian MHFCS data stream Unidentified hf digital -> add a comment about Link-11 variants

Regards

linkz

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Cartoonman

2971 days ago

Score 0

Thanks, I commented on them. Moved unid psk signal narrowband into signal page as Australian Military ISBIndependent Side Band Modulation Modem.

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Tape

2969 days ago

Score -1

"Anyone can edit a signal page by clicking the "edit with form" at the top of the page."

I was going to identify some signals, but since your completely incompetent arse can't deliver what you promise, I'll refrain from helping. (can't edit)

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Cartoonman

2968 days ago

Score 0

What was the issue? There's two ways one can edit a page. One is using the form. The other is by using edit. If you can explain the specific issue you faced when trying to edit the page, we can fix the issue.

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Admin

2968 days ago

Score 0

Yes please explain the issue so we can fix it. Everything appears to be working fine at the moment on my end.

Or are you trying to click the edit button on the main page? You need to click edit on a signal page to edit it.

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Anonymous user #1

1771 days ago

Score 0

Editing,identification and COMMENTING on these signals needs to be extremely easy, the people that actually know what they are could care less about forms and logins

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Anonymous user #2

2965 days ago

Score 0

Any info on 1536125? - LargeVirus

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Cartoonman

2964 days ago

Score 0

I dont have anything that would be useful for that one :/. It could be some packet-switched pager, or telemetry. Might even be one of those suggested signals, but I'm just guessing. Probably FSKFrequency-Shift Keying based.

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Avsa242

2947 days ago

Score 0

When I originally posted this one, I checked on the FCC's license search, and both frequencies are assigned to water towers near my area, so I'm guessing the data has something to do specifically with that.

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Avsa242

2948 days ago

Score 0

UNID Telemetry http://www.s...ID_Telemetry - minimodem consistently decodes some of this to plaintext ASCII (minimodem --rx 1200). 0:20 looks like some sort of periodic TXTransmit test (12345qrstuvwxyz). It doesn't sound exactly like the standard tones used in, e.g., APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area though, so I'm sure some settings could be tweaked a bit.

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Cartoonman

2936 days ago

Score 0

interesting, how did you decode the FSKFrequency-Shift Keying? some sort of generalized FSKFrequency-Shift Keying decoder?

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Anonymous user #3

2928 days ago

Score 0

Unknown 409 bears a strong resemblance to MPT1317. It uses exactly the same modulation and coding as MPT1327 except that multiple base stations share the same frequency hence the stopping and starting of the data bursts at regular intervals at different signal strengths.

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Cartoonman

2926 days ago

Score 0

I will definitely look into this, thanks for your observations!

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Cartoonman

2908 days ago

Score 0

I looked into it and it doesnt seem to be similar enough, unknown 409 looks to have a PSKPhase-Shift Keying modulation thing going on, but it doesnt seem to be MPT.

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Avsa242

2927 days ago

Score 0

Cartoonman,

Yes - there's a great little piece of software called minimodem (lives at http://www.w...m/minimodem/). It allows you to "receive" or "transmit" AFSKAudio Frequency-Shift Keying at any arbitrary bitrate via your soundcard. You can fiddle with all sorts of settings like mark and space tone values, start and stop bits, and a bunch more- pretty neat.

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Avsa242

2926 days ago

Score 0

I *think* Unknown Sinal 280 (http://www.s...wn_Sinal_280) is iDEN (http://www.s...twork_(iDEN) ). I see the same spectrum and hear the same sound (sounds virtually the same as the background noise) on 770-something MHzMegaHertz (MHz) 10^6 Hz; occupies the same amount of spectrum, about 18-19kHz.

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Avsa242

2926 days ago

Score 0

I posted Unknown FSKFrequency-Shift Keying Blips (http://www.s...wn_FSK_Blips) a long time ago. I think these are just some sort of idling signal sent by mobile units, as sometimes the air breaks and a National Grid tech will be talking on it.

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Cartoonman

2926 days ago

Score 0

@Avsa242: Thanks! I'll definitely play around with minimodem. I long suspected Unknown Sinal 280 to be IDEN but i just never saw my local iDEN have those bursts like that. I'm 90% certain though that it is iDEN of some sort.

The idling sequence for some radios are pretty interesting. I haven't seen a FSKFrequency-Shift Keying-based idle before. These continued bursts are definitely characteristic of an idling radio maintaining channel presence for other radios to know if they're in range and available to take a call. It would be very hard to make an article on 'idling radios' since they all seem to have their own format. the digital radios like P25 have their own, so do DMR and MotoTRBO. Analog just keys on in bursts.

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Anonymous user #4

2924 days ago

Score 1

Unknown MPT1327-Like signal appears compound modulated, i.e. FMFrequency Modulation or AMAmplitude Modulation. I will try and download it and look at it later. I suspect an underlying BB containing a V-series modem.

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Anonymous user #5

2916 days ago

Score 0

Unknown 16p4732 PSKPhase-Shift Keying Serial is a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO).-4285. ACFAutoCorrelation Function 106.66mS and waterfall fit fine.

Best regards.

ANgazu.

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Cartoonman

2911 days ago

Score 0

спс ANgazu!

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Anonymous user #6

2907 days ago

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My best guess for the signals in 'Unknown 161p995' is AIS. (Ch A @ 161.975Mhz , Ch B @ 162.025Mhz)

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Anonymous user #7

2820 days ago

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The 27Mhz Happy New Year and Human Voice is no doubt 11 meter illegal CB radio operators doing their usual.

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Cartoonman

2820 days ago

Score 0

if only we could name signals 'CB Shenanigans' eh? :^)

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Anonymous user #8

1405 days ago

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It's also Christmas music.

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Anonymous user #9

2799 days ago

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"Unidentified" 158.09 is POCSAG paging on 158.1, very common

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Cartoonman

2798 days ago

Score 0

I agree, definately looks like it. Do you happen to have an IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. recording or audio sample of it? The frequency sweep intro and end look interesting, none of the POCSAG's near me have that.

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Anonymous user #10

2793 days ago

Score 0

THAT IS ASTOUNDING! Your "Unknown Pear 1" signal is PRECISELY what one would expect to see as the emissions from the startup sequence of nuclear fusion reactor using magnetic confinement, the emission would reflect the design of the reactor chamber in the sense that the chamber (acting as a resonate cavity) would be make radio emission at frequency in maybe few dozen Mcs according to the dimension of chamber inner wall and dimension of outer high-mu electromagnet poles these are used for the magnetic confinement of plasma, and oscillate from confine to release to allow more fuel and exhaust output, these type of reactor make electric current in AC from magnetic feedback from reacting plasma, then cycle repeat, at resonate frequency of chamber. These reactor ONLY has one maker and purpose, it is made in USA and Russia only and made for propel electric spy plane, population mistake for UFO of course, but line straight across USA make for medium altitude pass for picture of secret sights, only then electric spy plane make up angle and start fusion plant accelerate to ~12000 kph return to orbit. These is not new, gas rocket or jet engine spy plane SR-71 had partial version of electric propel but no fusion device SR-71 make retirement now because on the 1990 this become active make your SR-71 obsolete and new CHINA electric spy plane only pass over short altitude, make mistake for alien UFO

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Cartoonman

2792 days ago

Score 0

That's very interesting!. I presume these reactors are part of things like reported here: http://www.b...sion-reactor

I'll take a look into this and transfer Unknown Pear to identified Signals soon. Thanks!

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LV

2688 days ago

Score 0

as this is on the ham bands - it is most likely only one of those transmissions where people use some software (forgot which) to make images and spell out things on people using sdr with waterfall's screens

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Anonymous user #8

1405 days ago

Score 0

I only wish your comments were relevant.

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Anonymous user #11

2619 days ago

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The 160m one is stanag.

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Cartoonman

2618 days ago

Score 0

I verified the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate and it is 2400, the same as stanag. It doesn't do well on the phase plot though, but thats because of severe multipath interference. Thanks!

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9A3CBX

2574 days ago

Score 0

7p585 is most likely an OTHOver The Horizon (very long range) radar or something used for research of oceans/ionosphere, agree? Correct me if I'm wrong.

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Cartoonman

2574 days ago

Score 0

Yes, it is definitely a type of radar. As to what specific one it falls under is still a mystery. A possible candidate given the waterfall is http://www.s...twork_(JORN). But I have seen other unidentified signals with that tone in front.

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Ywsia1

2516 days ago

Score 0

See now what I dont understand is why wouldnt they be able to create Minimodem for windows.....? I want minimodem!! FOR MY OS!!

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Cartoonman

2515 days ago

Score 0

If its open source, you could compile it for windows binary

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Jks

2515 days ago

Score 0

"Unknown 0p006592" is Moscow time-signal station RBU (see Wikipedia for more info). You can hear it very clearly at the KiwiSDR in Moscow run by RZ3DVP http://rz3dvp.ru:8073/

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Anonymous user #12

2425 days ago

Score 0

4p723 is eam for usa airorce sending messages as its on alot of frequencies like 15016khz

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Ywsia1

2406 days ago

Score 0

Hey has anyone ever gotten around to solving my 464.75 MHzMegaHertz (MHz) 10^6 Hz pulsing with the rhythmatic bursts?

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Anonymous user #13

2291 days ago

Score 0

Signal Repeated tone is a type of SCADA telemetry associated with utilities usually water treatment plants. It used to be country wide unntil most adopted other digital methods.

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Anonymous user #13

2291 days ago

Score 0

unknown trunking or data signal is a type of SCADA associated with substations. The constant data bursts are updates on the status of the substation.

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Ywsia1

2238 days ago

Score 0

Please add that to the 'SCADA' section of this wiki.

I have also found a signal that I had listened to at least 4 times before, the transmitter is somewhere in Illinois, and has a TONS of AFSKAudio Frequency-Shift Keying modulations, but there is a slight problem. I can only receive it from my radio scanner... I do not have the time and money to bring my SDR to Chicago to receive this extremely rare almost APOC signal, AFSKAudio Frequency-Shift Keying modulated of course... usually not around anymore.... I will post to this wiki as well as a spectrum of what it looks like in real time... Note this will not be from my SDR, it will be IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. type, but I will have a frequency up in time, its not a baseband, only a I and Q of the spectrum....

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Anonymous user #14

1886 days ago

Score 0

where can i hand in some screenshots of a signal?

tnx H

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Anonymous user #15

1716 days ago

Score 0

Listen to the ghost box nantucket file

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Anonymous user #16

1618 days ago

Score 0

Not a few of these mysterious 'transmissions' are caused by interference from the user's own domestic appliances, starting with computer CPU, PSU, monitor etc. These devices produce harmonics ('birdies') which seem like carriers; they also radiate pulses that appear to be signals. One of the noises here is a cell-phone charger! Solar-power roof-top systems are incredibly noisy!

Electrical appliances are by law not allowed to interfere with TV or radio broadcasts, but they can be heard on other parts of the spectrum.

A lot of commercial two-way VHFVery High Frequency (30-300 MHz)/UHFUltra High Frequency (300-3000 MHz) radio is trunked and digitally encrypted, and so it seems exciting, but is just routine messaging. And ham radio conversation is often pretty dull. Trust me... I'm a ham. It's 'ham'. Not 'HAM'. The letters do not stand for anything.

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Anonymous user #8

1405 days ago

Score 0

I can ID about two dozen of these signals, down to the make and model of the equipment, and typical users, but I see no way to just "ID" them. To some, they will always remain a mystery, to others, crap we work with daily.

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Anonymous user #17

1107 days ago

Score 0

"Weird pulsing" - CISCommonwealth of Independent States (CIS), the former Soviet Republic VFTVoice Frequency Telegraphy 3ch FSKFrequency-Shift Keying system. "New possible Russian digimode" - CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-4 FTM. "Weird Signal at 6912.43" - apparently idle 12-tone AT-3004D waveform. And a lot of Russian channel markers in this list, sure these markers must be moved to at least one Wiki page here. Same with "Unknown Russian Intel" transmissions - they are all related.

Best regards, RT.

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Anonymous user #8

1018 days ago

Score 0

145.870MHz - video display interference

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Anonymous user #8

1018 days ago

Score 0

3790 kHzKiloHertz (kHz) 10^3 Hz: https://www....sic_Station) Heard, and known, for decades

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Anonymous user #8

1018 days ago

Score 0

40M pulsing spark gap lijke QRN - mains interference, due to arcing

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Anonymous user #8

1018 days ago

Score 0

80 Meter Unknown - Consumer electronics interference, most likely a battery charger

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Anonymous user #8

1018 days ago

Score 0

FSKFrequency-Shift Keying Signal - TADIL aka Link-xx

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Anonymous user #8

1018 days ago

Score 0

K3UU-Unknown - CODAR

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Anonymous user #8

1018 days ago

Score 0

Nknown 472p875 - Mobile Data Terminal, taxi, law enforcement, et cetera

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Anonymous user #8

1018 days ago

Score 0

Noise on 160m - Digital Voice Terminal, long interleave. Military, DoD, NATONorth Atlantic Treaty Organization, et cetera.

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Anonymous user #8

1018 days ago

Score 0

Noise on HFHigh Frequency (3-30 MHz) HAM Bands from 0 to 30 Mhz - Local consumer electronics RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum. Check your house, or a neighbour.

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Anonymous user #8

1018 days ago

Score 0

Noise over all HFHigh Frequency (3-30 MHz) bands - Television display. Sound changes, as image changes.

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Anonymous user #8

1018 days ago

Score 0

Periodic Signal - Potentially Police Related - VHFVery High Frequency (30-300 MHz) Pagers.

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Anonymous user #8

1018 days ago

Score 0

Possible weather station sensor on air band - VORTAC

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Anonymous user #8

1018 days ago

Score 0

Repeated Tone - Water system telemetry

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Anonymous user #8

1018 days ago

Score 0

Sounds like a pager - Site to site data link for paging systems.

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Anonymous user #8

1018 days ago

Score 0

Squiggling oddity - I could tell you, but nobody likes the answer.

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Anonymous user #8

1018 days ago

Score 0

Strange Musical Repeating Tone - 945.716 MHzMegaHertz (MHz) 10^6 Hz - Local consumer product RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum

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Anonymous user #8

1018 days ago

Score 0

UNID Telemetry - Metropolitan water system. Ask a tech what brand radio equipment they use.

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Anonymous user #8

1018 days ago

Score 0

UNKNOWN 9.170 MHZ - OTHR, Over The Horizon Radar

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Anonymous user #8

1018 days ago

Score 0

Unidentified 406p214 - Hydrological telemetry uplink. Look for sites near rivers, especially near bridges.

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Anonymous user #8

1018 days ago

Score 0

Unidentified 5066p3kHz signal - Military radar data.

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Anonymous user #8

1018 days ago

Score 1

Unidentified signal (APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area-like) - Hydrological telemetry. Stream gaging station.

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Anonymous user #8

1018 days ago

Score -1

Unknow Happy new year and human voice - US citizens band radio noisemakers from kids toys. Common since the 1980's. Christmas music, not happy new year.

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Anonymous user #8

1018 days ago

Score 0

Unknow signal lewis county Washington state - Your cellular phone radio system.

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Anonymous user #8

1018 days ago

Score 0

Unknown 14.522-ish - OTHR, Over The Horizon Radar

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Anonymous user #8

1018 days ago

Score 1

Unknown 14p219 - PSKPhase-Shift Keying amateur radio mode.

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Anonymous user #8

1018 days ago

Score -1

Unknown 161p995 - Video display interference.

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Anonymous user #8

1018 days ago

Score 1

Unknown 167 - Water system. Well monitoring.

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Anonymous user #8

1018 days ago

Score 1

Unknown 171.651600 MHzMegaHertz (MHz) 10^6 Hz - X.25 data bursts, probably seismic systems.

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Anonymous user #8

1018 days ago

Score 1

Unknown 173 - Metropolitan water system, well monitoring, command, and control telemetry.

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Anonymous user #8

1018 days ago

Score 0

Unknown 19.07 MHzMegaHertz (MHz) 10^6 Hz - OTHR, Over The Horizon Radar. The 3 beeps is Morse Code letter S, to identify the signal, and that it is about to occur.

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Anonymous user #8

1018 days ago

Score 0

Unknown 40 3 - Irrigation system telemetry.

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Anonymous user #8

1018 days ago

Score 1

Unknown 434p450 - Household weather station.

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Anonymous user #8

1018 days ago

Score 1

Unknown 465p97 MHzMegaHertz (MHz) 10^6 Hz - UHFUltra High Frequency (300-3000 MHz) pagers.

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Anonymous user #8

1018 days ago

Score -1

Unknown 465p97 MHzMegaHertz (MHz) 10^6 Hz - Narrowband digital voice terminal, short interleave.

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Anonymous user #8

1018 days ago

Score 0

Unknown 7p585 - Over The Horizon Radar

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Anonymous user #8

1018 days ago

Score 1

Unknown Helix - Video display, could be interference, or the actual visual transmission, depending on frequencies used in the region

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Anonymous user #8

1018 days ago

Score 0

Unknown NFMNarrowband Frequency Modulation Squelch system - LTR, Logic Trunked Radio control data

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Anonymous user #8

1018 days ago

Score 0

Unknown Numbers Station 4p723 - EAM, emergency action message

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Anonymous user #8

1018 days ago

Score 0

Unknown Ringing - VHFVery High Frequency (30-300 MHz) pager modes identifying themselves. Part of a city-wide multiformat paging network.

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Anonymous user #8

1018 days ago

Score 0

Unknown digi mode - Coastal station digital "wheel".

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Anonymous user #8

1018 days ago

Score 0

Unknown72p00Mhz - Paging system site to site data link.

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Anonymous user #8

1018 days ago

Score 0

Weird Signal on Multiple Frequencies - Consumer electronics interference.

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Anonymous user #8

1012 days ago

Score 0

Weird pulsing - consumer electronics RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum

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Anonymous user #8

1012 days ago

Score 0

Wide signal unknown modulation - pagers, on a national paging frequency.

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Anonymous user #18

958 days ago

Score 0

Does anyone have a signal on 1917KHz; 1948KHz 1981KHz Etc, (spaced 32KHz apart). Top Band, 160Metres.

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Anonymous user #8

869 days ago

Score 0

2021-05-01T16 37 56Z 27105p00kHz - ROS digital mode, popular for at least a decade.

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Anonymous user #19

738 days ago

Score 0

Weather alarm unknown frequency:https://www....und_4770_Khz

Is actually this: https://priy...ia/the-alarm

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Anonymous user #20

553 days ago

Score 0

Frequency Drifting signals (13.795 MHzMegaHertz (MHz) 10^6 Hz — 13.83 MHzMegaHertz (MHz) 10^6 Hz) -> assumingly a so-called "chirp transmission" possibly. The Utwente SDR webpage has more info about these on http://websd...8901/chirps/

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Anonymous user #21

531 days ago

Score 0

hi

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Anonymous user #22

45 days ago

Score 0

Antartida HAARP on ULF?:

https://trop...00anim72.gif

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