DUP-ARQ

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 DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query - DUP-ARQ-2 - DUP-FEC-2 
DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query
DUP ARQ.jpg
Frequencies 3 MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation FSKFrequency-Shift Keying
ACFAutoCorrelation Function
Bandwidth 325 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.325 kHzKiloHertz (kHz) 10^3 Hz
3.25e-4 MHzMegaHertz (MHz) 10^6 Hz
0.325 kHzKiloHertz (kHz) 10^3 Hz
3.25e-4 MHzMegaHertz (MHz) 10^6 Hz
0.325 kHzKiloHertz (kHz) 10^3 Hz
3.25e-4 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description 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.
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[edit]

DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query DUP-ARQAutomatic Repeat reQuestAutomatic Repeat Query ALEAutomatic Link Establishment
DUP ARQ.jpg
Ale dup arq.jpg

Decoding Software[edit]

Professional Equipment/Software
  • Shoc go2decode
  • Shoc go2monitor
  • Wavecom W-Code
  • Wavecom W-Spectra

Additional Links[edit]

Additional Images[edit]