MMWCAS-RF-EVM: How about the phase mismatch when TX power backoff

xu qingjie

Intellectual 320 points

Part Number: MMWCAS-RF-EVM

Hi supporter；

We calibrate the phase mismatch between 4 cascade chips when TX power backoff=0.

After calibrated, we want to know if there will be phase mismatch when we set TX power backoff≠0.

thanks

over 3 years ago

0 E. Shareef over 3 years ago

TI__Genius 16880 points

Hello,

Thank you for reaching out to Texas Instruments. Your question is being forwarded to an expert on this topic. Please allow some time for them to get back to you.

Thanks,

-Shareef

+1 Sami Mardini over 3 years ago in reply to E. Shareef

TI__Expert 4170 points

Hi,

Phase mismatch should not change, after the power is backed off.

Regards,

Sami

+1 Sami Mardini over 3 years ago in reply to Sami Mardini

TI__Expert 4170 points

Hi,

I was talking to one of my colleagues regarding your inquiry, and here is what he said:

"If it’s external sensor level calibration done by the Customer then it’s recommended to be done using the same back-off level that they plan to use in the chirps."

Regards,

Sami

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MMWCAS-RF-EVM: How about the phase mismatch when TX power backoff