DUP-ARQ

 DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query - DUP-ARQ-2 - DUP-FEC-2 

DUP-ARQ

Frequencies	3 MHz,30 MHz
Frequency Range	3 MHz - 30 MHz
Mode	USB
Modulation	FSK
ACF	—
Emission Designator	—
Bandwidth	325 Hz
Location	Worldwide
Short Description	DUP-ARQ, also known as ARTRAC and 125-ARTRAC, is a semi-duplex ARQ system once used by Thai and Hungarian Diplomatic services.
I/Q Raw Recording	—
Audio Sample

DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query, also known as ARTRAC and 125-ARTRAC, is a semi-duplex ARQAutomatic Repeat reQuestAutomatic Repeat Query system once used by Thai and Hungarian Diplomatic services.

BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate is typically 125 bdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. at 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). shift using ITA-2. If a DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query system detects interference it will change frequency in 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). steps (See DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query ALEAutomatic Link Establishment sample below). If a 3kHz channel is full of interference the system will select another frequency.

Samples

DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query	DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query ALEAutomatic Link Establishment

Decoding Software

Professional Equipment/Software

• go2DECODE
• go2MONITOR
• Wavecom W-Code
• Wavecom W-Spectra
• Rohde&Schwarz CA100

Additional Links

• go2monitor DUP-ARQ
• WAVECOM Database: DUP-ARQ
• shoc Database: DUP-ARQ
• RadioScanner.RU DUP-ARQ ALE
• RadioRaft DUP-ARQ