How to fix the warning message " Overflow detected in the Arb's Digital Gain circuit. " when i used RFmx WFC to create one 802.11be 40MHz WLAN signal

Updated Jul 17, 2024

Environment

Software

  • RFmx
  • RFmx Waveform Creator 

When you generated one 802.11be 40MHz signal by RFmx Waveform Creator for WLAN with all original default parameters, you would find below warning message:

WLAN Creating warning message.png


You can try to change the power level , but could not fix the warning message. How to fix it in SFP? Why does the warning message only show on 802.11be 40MHz , not showing for 20M/80M/160M/320M ?
 

Overflow warning is from resampling that happens in RFSG before generation.
Depending upon IQ data, sometimes overflow might occur on resampling. So, on changing bandwidth or other configuration settings, warning is not seen.

You can either increase 'Fullscale Backoff' or 'Oversampling Ratio' values to fix the warning.
 

The warning message was dis-appeared after increasing the value of 'Fullscale Backoff' or 'Oversampling Ratio' ;
increase fullscale bakoff.jpg
increase fullscale bakoff.jpg
 

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