NXP Semiconductors UM11490 - Set Tx Power

NXP Semiconductors
UM11490
Feature Configuration Guide for NXP-based Wireless Modules on i.MX 8M Quad EVK
2.8.5 Set Tx power
This section shows how to set the Tx power. The commands only set power if caldata is
already loaded in the firmware. The test also requires first to load the driver modules to
bring-up NXP-based wireless module.
Step 1 - Enable the RF test mode
root@imx8mqevk:~# echo "rf_test_mode=1" >> /proc/mwlan/adapterX/config
Verify that the output value of rf_test_mode is 1.
root@imx8mqevk:~# cat /proc/mwlan/adapterX/config
Step 2 - Set the Tx power
For example:
root@imx8mqevk:~# echo "tx_power=16 2 0" >> /proc/mwlan/adapterX/
config
<tx_power> combines three parameters:
<tx_power> = <power> <modulation> <path id>
Where:
Parameter Definition
power Power value in the range of 0 to 24 dBm
modulation
Signal modulation
• 0 = CCK
• 1 = OFDM
• 2 = MCS
path id
Tx signal path name
• 0 = path A
• 1 = path B
• 2 = path A + path B
UM11490 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved.
User manual Rev. 2 — 29 January 2021
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