How to resolve the PSDU CRC Status Fail issue encountered during RFmx WLAN testing?

When you perform ModAcc testing with RFmx WLAN , you will often encounter a PSDU CRC Status result of Fail, as shown in the following figure:

You can see that the EVM measurement results are good, but the PSDU CRC Status in the PPDU Info measurement results is Fail. How can this be resolved?

1. View the waveform parameters of the generation WLAN signal, below image show the WLAN waveform setting of RFmx Waveform Creator for WLAN :

As shown above picture , the WLAN signal is 802.11ax 20MHz, and the No. of Data Symbols setting is 95, meaning the WLAN signal contains 95 symbols.

2. To check the RFmx WLAN settings, the Maximum Meas Length needs to be greater than or equal to the RFSG side's No of Data Symbols value ;

As shown above image , the default value for Maximum Meas Length is 16 symbols, so this value should be changed to be greater than or equal to 95 symbols.

3. Enable Data Decoding Enabled feature in RFmx WLAN side , like below picture:

After completing the above steps, you will see that the PSDU CRC Status result changes to Pass, as shown below picture: