signal heard on 5892.0 KHz/USB, 0758 UTC, most likely from Austrian Military. AutoCall is a proprietary ALE waveform by Israeli Tadiran/Elbit communication system. AutoCall delivers faster and more reliable link establishment and is recommended when greater tactical efficiency is critical; AutoCall is used eg in TADIRAN HF-6000 radio system. HF-6000 system is also sold by Telefunken Racoms.
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| model VRC-6020 (20 W) |
Some characteristic elements of the signal can be observed from the sonogram:
- the 1000-Hz tuning/sync beep which preceeds all transmissions;
- the proprietary MFSK-4 Autocall system's tones centered at 2850 Hz, serving a variety of linking and communication functions;
- the four tones located at 2400, 2700, 3000 and 3300 Hz
Manipulation speed is 125 symbols/sec and the step between two tones is 300Hz.
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