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Frequencies 7.051 MHz
Frequency Range 7.051 MHz - 7.051 MHz
Mode USB
Modulation MSK
Emission Designator
Bandwidth 1.2 kHz
Location Russia
Short Description Russian datalink used during the invasion of Ukraine.
I/Q Raw Recording
Audio Sample

Akkord-SS-PD (АККОРД-СС-ПД), also known as “Akkord-165” is a Russian datalink used during the invasion of Ukraine. Akkord is a fairly old family of datalink protocols, Akkord-165 being the most recent version.

It's speed varies between 1200, 2400, 4800 and 9600 bpsBits per second (bps), and the block lenght varies between (165, 144), (117, 96), (69, 48). Most of the intercepted radio links have been characterized by a telegraph speed of 1200 bpsBits per second (bps) FSKFrequency-Shift Keying with a shift of 800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). in the frequency range 5-7 MHzMegaHertz (MHz) 10^6 Hz which suggests short to medium range distances.


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