Also known as Racal/Thales Skyfax, Racal/Thales MSM, SKYFAX, Skyfax MSM, JAVELIN MSM-1250, and other variations, MSM-1250 (Medium Speed Modem) is a 10 FSKFrequency-Shift Keying-2 OFDMOrthogonal Frequency-Division Multiplexing (Orthogonal Frequency Division Multiplex) digital data protocol used by the stand-alone modem "SkyFax", used to transmit and receive faxes on HFHigh Frequency (3-30 MHz).
There are 10 parallel FSKFrequency-Shift Keying channels used, each channel spaced 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). apart and with 150 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). spacing within the channel. Each channel transmits 125 bpsBits per second (bps), giving a transfer capacity of 1250 bpsBits per second (bps).
|MSM-1250||MSM-1250 w/with ALEAutomatic Link Establishment:||MSM-1250 EOTEnd of Transmission/Idle:|
None so far. Please add one if you know one.
- Signals Analysis Blogspot: OFDM MSM-1250
- Hoka Skyfax Info
- RadioScanner.RU MSM-1250
- HF Asia MSM1250 Skyfax