Inmarsat IsatM2M

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Inmarsat IsatM2M
Frequencies 1525 MHz,1559 MHz
Frequency Range 1525 MHz - 1559 MHz
Mode USB
Modulation MFSK
Emission Designator
Bandwidth 1.024 kHz
Location Worldwide
Short Description IsatM2M Service operated by Inmarsat on existing Inmarsat-D/D+ infrastructure.
I/Q Raw Recording Download file
Audio Sample

IsatM2M Paging Service was operated by Inmarsat on (then) existing Inmarsat-D/D+ infrastructure. It was used for transport vehicle security, industrial equipment monitoring (SCADA) and marine tracking. Similar waveform to Inmarsat-D/D+ but employs faster bit rate and wider bandwidth.


32-MFSKMultiple Frequency Shift-Keying, 16 symbols/sec, 32 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). shift. ~80 bpsBits per second (bps) max data rate. Has idling mode and preamble. Compared to the Inmarsat-D/D+ waveform, IsatM2M is 2-4x faster, with maximum data rate of 80 bpsBits per second (bps) (compared with Inmarsat-D/D+'s maximum datarate of 20-40 bpsBits per second (bps)).


Inmarsat withdrew M2M from service on the 31st of December 2021, replacing it with IsatData Pro.


(Sample contributed by RAPIDBIT)

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