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LP-EM-CC2340R5: CC2340R5

Phil Gent
Prodigy 10 points
Part Number: LP-EM-CC2340R5
Other Parts Discussed in Thread: LP-XDS110ET,

Tool/software:

Hi,

I have a LP-EM-CC2340R5 (via a LP-XDS110ET) in the proprietary MSK mode 250kbps using Smart RF Studio 8 (v1.1.0 #49) and have FM demodulated via a vector signal analyzer. The waveform is unexpected, with a deviation of  approximately 500kHz ( pk-pk/2 ) and does not correspond to my expected definition for MSK: MSK or Minimum BFSK: a 2-FSK with modulation index h=0.5.

Can anyone explain the proprietary MSK 250kbps mode modulation in more detail please.

Thanks
Phil

  • 0
    TI__Expert 4550 points

    Hi Phil,

    We create MSK differently by adjusting the deviation and data rate to achieve the 0.5 index ratio. The adjustment happens by phase shifting the oscillator during a bit down-ramp transition when the power is 0.

    Best regards,

    Bun