HC-265 Voice Scrambler

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HC-265 Voice Scrambler
HC 265.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 2250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).2.25 kHzKiloHertz (kHz) 10^3 Hz
0.00225 MHzMegaHertz (MHz) 10^6 Hz
,3000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).kHzKiloHertz (kHz) 10^3 Hz
0.003 MHzMegaHertz (MHz) 10^6 Hz
2.25 kHzKiloHertz (kHz) 10^3 Hz
0.00225 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.003 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description HC-265 is a Voice Scrambling mode developed by Hagelin Crypto for their HC-265 CRYPTOCOM secure voice unit.
I/Q Raw Recording
Audio Sample
HC-265 is a Voice Scrambling mode developed by Hagelin Crypto AG for their HC-265 CRYPTOCOM secure voice unit.

One key feature of this mode is it's FSKFrequency-Shift Keying preamble and the sync tones during voice transmission. The standard HFHigh Frequency (3-30 MHz) protocol uses two 120Bd FSKFrequency-Shift Keying signals for the preamble. One HFHigh Frequency (3-30 MHz) variation uses one 300Bd FSKFrequency-Shift Keying signal for the preamble. The UHFUltra High Frequency (300-3000 MHz) variation uses two 240Bd FSKFrequency-Shift Keying signals for the preamble.

All HC-265 transmissions use a sync tone that allows the reciever to stay in sync with the transmitter so that the voice message can be properly decoded. You can hear this sync tone in the background of the speech or when the speech is silent. At the end of each transmission there is a FSKFrequency-Shift Keying EOT (End of Transmission) signal sent.


Samples[edit]

HC-265 HFHigh Frequency (3-30 MHz) 2x120Bd HC-265 HFHigh Frequency (3-30 MHz) 1x300Bd HC-265 UHFUltra High Frequency (300-3000 MHz) 2x240Bd
HC 265.jpg
HC 265 HF Var.jpg
HC 265 UHF.jpg


Additional Samples:

  • 23 April 2015 @ 14.3974MHz:

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