ARQ-E(E3)

ARQ-E(E3)
Frequencies	3 MHz,30 MHz
Frequency Range	3 MHz - 30 MHz
Mode	USB
Modulation	FSK
ACF	—
Emission Designator	—
Bandwidth	85 Hz,160 Hz,170 Hz,190 Hz,340 Hz,388 Hz,400 Hz,850 Hz
Location	Worldwide
Short Description	ARQ-E, also known as ARQ-1000 Duplex or ARQ-1000D, is a synchronous full-duplex ARQ system. ARQ-E3 is a variant that uses a different alphabet encoding. Mainly used by French Military Forces. Stations commonly idled for hours on end.
I/Q Raw Recording	—
Audio Sample

ARQAutomatic Repeat reQuestAutomatic Repeat Query-E, also known as ARQAutomatic Repeat reQuestAutomatic Repeat Query-1000 duplex or ARQAutomatic Repeat reQuestAutomatic Repeat Query-1000D, is a synchronous full-duplex ARQAutomatic Repeat reQuestAutomatic Repeat Query system. ARQAutomatic Repeat reQuestAutomatic Repeat Query-E3 is a variant that uses a different alphabet encoding. Once used by Italian and French Military Forces. Stations commonly idled for hours on end.

ARQAutomatic Repeat reQuestAutomatic Repeat Query-E was developed by Siemens in Germany. ARQAutomatic Repeat reQuestAutomatic Repeat Query-E uses 7-bit ITA 2-P alphabet. ARQAutomatic Repeat reQuestAutomatic Repeat Query-E3 is a variant that uses the 7-bit error correcting ITA 3 alphabet. When decoding ARQAutomatic Repeat reQuestAutomatic Repeat Query-E, if many 'F' characters are being decoded, it's very likely it's a ARQAutomatic Repeat reQuestAutomatic Repeat Query-E3 protocol. The same is true vice-versa, decoding with ARQAutomatic Repeat reQuestAutomatic Repeat Query-E3 on an ARQAutomatic Repeat reQuestAutomatic Repeat Query-E signal.

ARQAutomatic Repeat reQuestAutomatic Repeat Query-E(E3) can operate on a wide range of bauds, from 30 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. to 650 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. They're most commonly found with bauds between 96 and 233. The bandwidth is also pretty varied, with the smallest at 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., and the largest at 850 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)..

Operators[edit]

List of operators who have been reported to use ARQAutomatic Repeat reQuestAutomatic Repeat Query-E with the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate and shift they used:

46.15 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). UNID African user (Arabic alphabet)
72 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Police, German Border Guards
72 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). French MIL
85.71 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 160 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Air Force
96 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Police
96 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Police, German DIPLO, German Intelligence, Italian DIPLO
96 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 340 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Israeli Intelligence
96 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 850 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Italian Intelligence
184.6 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. /400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). French MIL
192 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. /160 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). French MIL
192 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. /170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German DIPLO, possibly South African Intelligence
192 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. /190 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Intelligence
288 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 190 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). German Intelligence
288 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 340 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Israeli Intelligence
288 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. / 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). possibly Taiwanese Intelligence