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Original question:

CCS/LAUNCHXL-CC1312R1: CC1312 @433MHZ sensitivity

CC1312R: 4-FSK Modulation Support?

Andrew Koenig
Prodigy 10 points
Part Number: CC1312R

Hi,

How do I configure the CC1312R(7) for 4-FSK modulation? The goal here is to talk to various LMR modes, such as APCO P25 (C4FM -> 4-FSK) and ETSI DMR. I see this mode referenced in the datasheet, but the technical manual is light on details for 4-FSK (and really FSK/GMSK in general). I'm also having a hard time finding a way to configure my LaunchPad board for 4-FSK using SmartRF Studio.

Thanks,

Andrew

  • 0
    TI__Guru**** 317180 points

    Set CMD_PROP_RADIO_DIV_SETUP.formatConf.fecMode = 9

    Note that the deviation is then set as the deviation of the inner symbols, meaning if you want the deviation to be 50 kHz, modulation.deviation = (50000/3)/250. 250 Hz is the step size for nominal settings. For 4-GFSK the modulation index for inner symbols should be >= 1/3. Lower modulation index will degrade sensitivity significantly