• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 233 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AWR2243: power variation

Khoi Le
Prodigy 40 points
Part Number: AWR2243
Other Parts Discussed in Thread: MMWCAS-DSP-EVM, MMWCAS-RF-EVM

I have a mmwcas-rf-evm and mmwcas-dsp-evm.  Assuming I am transmitting with one Tx antenna at a time at 13 dBm max power, and a calibration corner reflector at boresight at 5meters, what is the expected nominal range of Rx power variations as measured by each Rx when the radar is uncalibrated?  I made some measurements, but the value is a bit larger than expected >3dB between largest and smallest power values.  Should it be less than 1dB, 3dB, or some other value.  And what is the reason for this variation.  Thanks.

  • 0
    TI__Mastermind 31680 points

    Hello Khoi-San,

    Calibrations are required to mitigate the effects of process variations and temperature drifts. The TX power will degrade significantly if calibration is disabled. Even with calibration enabled, it is not always possible to maintain the full TX power at very high temperatures. Are you doing these measurements across temperature?

    The TX o/p power from the AWR device varies <1dB across temperature if the run time calibrations are enabled. >3dB variation is not expected.

    Could there be some other path loss variation in your setup across temperature?

    Regards,

    Ishita