Interfering Emissions
From Signal Identification Wiki
Interference and other noise. For jammers, see Jammer
| Inactive (No longer in use) |
Active (Currently in active use) |
Status Unknown or Intermittent |
| Signal Name | Description | Frequency | Mode | Modulation | Bandwidth | Location | Sample Audio | Waterfall image |
|---|---|---|---|---|---|---|---|---|
| AC Interference | Unidentified pulsating signal residing on 1915 KHzKiloHertz (kHz) 10^3 Hz as received in Northeast (East Central NY state). Bandwidth is approximately 30KHz wide. Signal levels S5 to S9. | 1.915 MHzMegaHertz (MHz) 10^6 Hz | AMAmplitude Modulation | 30 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| Acer X222W monitor, sleep pulse | Used for some PC monitors to keep the monitor's power on (or sleeping) across the spectra. Monitors may transmit whatever frequency peaks needed to keep it "on" or on sleep mode. | 420 MHzMegaHertz (MHz) 10^6 Hz — 470 MHzMegaHertz (MHz) 10^6 Hz | FMFrequency Modulation, AMAmplitude Modulation | Pulse | 300 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| Chinese Multitonal Jammer | Chinese radio jamming signals intended to disrupt/censor broadcast communications. | 9.045 MHzMegaHertz (MHz) 10^6 Hz | USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) | PPMPulse Position Modulation | 10 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| DisplayPort Interference | DisplayPort is a digital standard used to carry video and audio data to computer monitors. It emits RFRadio Frequency interference in the 300-400 MHzMegaHertz (MHz) 10^6 Hz range when in use. | 159.558 MHzMegaHertz (MHz) 10^6 Hz — 381.5 MHzMegaHertz (MHz) 10^6 Hz | RAW | 250 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| HDMI RFI Clock | HDMI is a popular media source for delivering video, audio, all in the same stream. Unfortunately, there is massive interference from it when a neighboring SDR is near it. It can disrupt receiving to a great degree. | 742 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 445.5 MHzMegaHertz (MHz) 10^6 Hz | Worldwide | — |  |
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| HP Laptop | RFRadio Frequency Interference Signals From HP Laptop | 50.9 kHzKiloHertz (kHz) 10^3 Hz | CWContinuous Wave | 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 | 1.5 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| High Speed USB Noise | High Speed USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) 2.0 clock noise. Shows up at multiples of 480 MHzMegaHertz (MHz) 10^6 Hz. | 480 MHzMegaHertz (MHz) 10^6 Hz — 960 MHzMegaHertz (MHz) 10^6 Hz | RAW | 200 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| Induction cooker interference | RFRadio Frequency interference from nearby induction cooker can sometimes be mistaken for a real LFLow Frequency (30-300 kHz) or VLFVery Low Frequency (3-30 kHz) transmission. | USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) | OOKOn-Off Keying Modulation | Worldwide |  |
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| Interferance signal from old computer screen | A very crunchy signal coming from my Old hyundai computer screen, the sound changes depending on what is shown on the screen | 639.006 MHzMegaHertz (MHz) 10^6 Hz | AMAmplitude Modulation, DSBDual Side Band Modulation | 23 kHzKiloHertz (kHz) 10^3 Hz | WORLDWIDE |  |
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| Ionized Meteor Trails | Meteors traversing the E region of the atmosphere approximately 60 - 90 miles up create ionizing trails which can reflect and refract radio waves from commercial FMFrequency Modulation radio stations that are hundreds and sometimes thousands of miles away from the receiver. | 88.3 MHzMegaHertz (MHz) 10^6 Hz | FMFrequency Modulation | Worldwide | .jpg) |
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| Lightning Sferics | VLFVery Low Frequency (3-30 kHz) RFRadio Frequency emissions from lightning in the atmosphere that can affect up to HFHigh Frequency (3-30 MHz) frequencies and beyond depending on strength. Has a popping crackle sound with both USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) and AMAmplitude Modulation modes of reception. | 0 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 30 MHzMegaHertz (MHz) 10^6 Hz | Worldwide |  |
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| RF heating and welding interference | Radio frequency heating and welding equipment may radiate interference which can be picked up by radio receivers. On a waterfall display, it usually appears as wobbly peaks that rapidly drift downwards in frequency. | 24 MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz | USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) | CWContinuous Wave, FMFrequency Modulation | Worldwide |  |
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| Smart TV Interference | Interference from Smart TV units | 528 MHzMegaHertz (MHz) 10^6 Hz | USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) | 84 kHzKiloHertz (kHz) 10^3 Hz | Worldwide |  |
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| Switch-mode power supply interference | Switch-mode power supplies, used in many types of electronic devices, can generate RFRadio Frequency noise on wide frequency ranges. | 10 kHzKiloHertz (kHz) 10^3 Hz — 200 MHzMegaHertz (MHz) 10^6 Hz | USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) | Worldwide |  |
Pages in category "Interfering"
The following 17 pages are in this category, out of 17 total.
ACDH |
H cont.ILN |
RSU |
