Israeli VFT

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Israeli VFTVoice Frequency Telegraphy
Preamble.jpg
Frequencies 3MHz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30MHz30,000,000 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,PSKPhase-Shift Keying
ACFAutoCorrelation Function
Bandwidth 3100 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).3.1 kHzKiloHertz (kHz) 10^3 Hz
0.0031 MHzMegaHertz (MHz) 10^6 Hz
3.1 kHzKiloHertz (kHz) 10^3 Hz
0.0031 MHzMegaHertz (MHz) 10^6 Hz
3.1 kHzKiloHertz (kHz) 10^3 Hz
0.0031 MHzMegaHertz (MHz) 10^6 Hz
Location Israel
Short Description Israeli based VFTVoice Frequency Telegraphy transmission, most likely used by Israeli government or military.
I/Q Raw Recording
Audio Sample
Israeli VFTVoice Frequency Telegraphy transmission, most likely used by Israeli government or military.

Has been seen with a number of modes. Seen with 4xPSK-75, 1xFSK-150, and both 4xPSK-75 and 1xFSK-150 together. The 4xPSK-75 data stream takes about 1.25kHz and the 1xFSK-150 1.8kHz, largely due to the shift. Putting both together in one VFTVoice Frequency Telegraphy has a total of 1.8kHz bandwidth, with the 4xPSK-75 fitting in right below the 1xFSK-150, taking up the free space.


Samples[edit]

4xPSK-75 1xFSK-150 4xPSK-75 and
1xFSK-150
4xPSK.jpg
FSK-150.jpg
4xPSKand1xFSK.jpg

Additional sound sample of an isolated channel from the 4xPSK-75.

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Additional Images[edit]