ARQ-E

FFT-SPECTRA 

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The FFT-Spectrum of an ARQ-E signal depends very much on the shift and the Baudrate of the transmitting station as well as the type
of traffic being transmitted across the circuit. ARQ-E stations do not have a characteristic FFT-spectrum, therefore the following baudrate/
shift table should help in identifying certain ARQ-E-users:

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• 46.15 Bd / 170 Hz  Saudi Arabia (Arabic alphabet)

• 72 Bd / 85 Hz          German Police, German Border Guards*
• 72 Bd / 400 Hz        French MIL

• 85.71 Bd / 160 Hz  German Air Force*

• 96 Bd / 85 Hz          German Police*
• 96 Bd / 170 Hz        German Police, German DIPLO*, German Intelligence*, Italian DIPLO*
• 96 Bd / 340 Hz        Israeli Intelligence
• 96 Bd / 850 Hz        Italian Intelligence

• 184.6 Bd /400 Hz    French MIL
• 184.6 Bd /850 Hz    French MIL

• 192 Bd /160 Hz       French MIL
• 192 Bd /170 Hz       German DIPLO*, possibly South African Intelligence*
• 192 Bd /190 Hz       German Intelligence*

• 288 Bd / 190 Hz      German Intelligence*
• 288 Bd / 340 Hz      Israeli Intelligence*
• 288 Bd / 400 Hz      possibly Taiwanese Intelligence*

* Please note that many of these users have phased out their ARQ-E equipment or left HF(!)

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