Product Info

RTL8822CE RTL8822CU RTL8822CS COB TSSI MP FLOW
©2019 Realtek Semiconductor Corp.
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3.2.1.2. Verify Tx performance
The following steps are the Tx performance verify command sample :
Step 1 : Enter WL MP mode.
rtwpriv wlan0 mp_start
Step 2 : Set HW Tx and Tx index to the case which is going to do the verification.
Example : To verify path A, CH10, HT40, MCS7, Calibrate Tx index
rtwpriv wlan0 mp_txpower patha=calibrated_tx_index, pathb=calibrated_tx_index
rtwpriv wlan0 10 1 a HTMCS7 1 2000
Step 3 : Measure Tx performance and check the performance with criterion table.
Path A CH10 HT40 MCS7 criterion :
Data Rate
Antenna
Channel
Item
Criterion
MCS7-B40
Antenna A
Antenna B
CH10
Power
Typical: 16dBm, Acceptable Range: +1/-1.5dB
EVM
< -28dB
Freq. Err.
±15ppm
Leakage
< -20dBtotal
Mask
IEEE spec. defined
Check whether the measured result is fit the criterion or not.
Step 4 : Before change the measuring channel, stop HW Tx.
rtwpriv wlan0 stop //Stop HW packet Tx