HF trading link '120 Hz FMCW idle tone'

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Unidentified radar-like HF trading link '120 Hz FMCW idle tone'
Radar FMCW 120Hz.png
Frequencies 19.31 MHz,20.24 MHz,20.548 MHz
Frequency Range 19.31 MHz - 20.548 MHz
Mode USB
Modulation FMCW
ACF
Bandwidth 10 kHz,9 kHz
Location Canada / Worldwide
Short Description A HF trading link in idle state which strongly resembles an FMCW radar with 120 Hz sweep rate. Has been observed to transmit CW ID once per hour.
I/Q Raw Recording Download file
Audio Sample

This signal is likely believed to be a high-frequency trading link in idle state. It very strongly resembles an FMCW radar, transmitting a linear upwards FMCW signal with 120 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). frequency, but a Morse code (CWContinuous Wave) ID has been heard, belonging to a HFT station in Canada. Bandwidth is about 9 kHzKiloHertz (kHz) 10^3 Hz to 10 kHzKiloHertz (kHz) 10^3 Hz. The signal may have been seen using 240 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). / 20 kHzKiloHertz (kHz) 10^3 Hz too, but this has not been confirmed.

Actual data transmission of this type has not been observed.

High-frequency trading is a form of automated stock trading in which large numbers of transactions are performed at high speeds, in time scales ranging from seconds to fractions of a second. To minimize latency, some HFHigh Frequency (3-30 MHz) traders have investigated the possibility of using shortwave radio to relay trading commands and information.

Samples

USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) sample

FMFrequency Modulation sample

Frequencies

This has been observed on the following frequencies:


19311 kHzKiloHertz (kHz) 10^3 Hz

20244 kHzKiloHertz (kHz) 10^3 Hz

20548 kHzKiloHertz (kHz) 10^3 Hz

18350 kHzKiloHertz (kHz) 10^3 Hz (?)

Additional Links

Video examples

Additional Images