cm276nf 5Gwifi rf_power_test

[sam_yu]

hi  everyone

Now I am using IMX8M to test the 5GWIFI power of CM276NF by issuing commands, but only 0dbm can be measured on the spectrum. What is the problem??? and belows is my command

echo "tx_frame=0" >> /proc/mwlan/adapter0/config
echo "rf_test_mode=1" >> /proc/mwlan/adapter0/config
echo "tx_antenna=1" >> /proc/mwlan/adapter0/config
echo "rx_antenna=1" >> /proc/mwlan/adapter0/config
echo "band=1" >> /proc/mwlan/adapter0/config
echo "bw=0" >> /proc/mwlan/adapter0/config
echo "channel=36" >> /proc/mwlan/adapter0/config
echo "tx_power=10 1 0" >> /proc/mwlan/adapter0/config
echo "tx_frame=0" >> /proc/mwlan/adapter0/config
echo "tx_frame=1 12 0xAAA 0x100 1 20 0 0 0 0 0 0 0 00:05:43:3f:c4:51" >> /proc/mwlan/adapter0/config
cat /proc/mwlan/adapter0/config

[shaun_wu]

Hello @sam_yu 

commend looks good. Could you share tester side setup?

Best Regards

Shaun

[sam_yu]

here is the log,and the power of 2.4G is fine

[shaun_wu]

Hello @sam_yu 

I tested on my side, there is no problem:

 

 You may check following:

set the tester to 5GHz and appropriate sample rate/capture length.

hardware connection. 

If still not work, you can share kernel version and board information to me.

Best Regards

Shaun

[sam_yu]

hi shaun

 Why is the command sent at 10dB and the instrument measurement is -2dB? Is that measurement correct? The instrument I used is IQVIEW, and the power value when measuring 5G WIFI is -88dB.

[shaun_wu]

Hello @sam_yu 

To protect tester, I add a 10dBm attenuator and I didn't calibrate rf path. 

-88dBm you may check 5G path hardware connection. Maybe cable, antenna setting.

Best Regards

Shaun

[sam_yu]

hi shaun

thanks for your reply, and the power uncorrect only appears in 5G testing, including on the spectrum, also shows low power. However, when I tested 2.4G, the power value was normal. If it is confirmed that there is no problem with the command, I think it is an issue with the instrument. I will use another instrument to measure it. Thank you for your reply !