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CC1200 -38dBm Tx power output

Matthew Bolsover
Prodigy 20 points
Other Parts Discussed in Thread: CC1200

How do I configure the CC1200 for -38dBm Tx power output as specified in the spec sheet (rev D)

The user guide contains contradictory information on page 96 indicating that the lowest power output is -16dBm which fits the equation value range specified for PA_CFG1. I see no reference to coarse steps to power output in this guide.

Could someone clarify the situation?

I'd be also interested to find out what the special power levels 0x00-0x02 are.

Thanks in advance.

  • 0
    TI__Guru**** 317180 points
    The 'special' power levels gives low output power. The accuracy of these power levers are +/- a few dB.

    0x00 gives ~-70 dBm, 0x01 gives ~-32 dBm, 0x02 gives ~-26 dBm
  • 0 in reply to TER
    Prodigy 20 points
    Thanks for the quick response
  • 0
    TI__Mastermind 27145 points

    Hi,

    You can use the SmartRFStudio to generate the Register settings for the required power level and for the required configuration also.

    Yes, CC1200 can be set to as low as -40dBm in coarse configuration.

    There are 2 steps in coarse confuration, which are -24dBm and -40dBm. These can be seen on SmartRFStudio.

    The special settings for PA_POWER_RAMP = 0x01 corresponds to -40dBm, 0x02 corresponds to -24dBm and 0x00 corresponds to -17.5dBm. These values can be verified on SmartRFStudio.

    Thanks,

    PM