Hi.
I want to use TX backoff with IWR6843.
When I have set the TX backoff with profile configuration, there was no change of SNR of the point cloud.
So I have checked mmwavelink source code and I found the below comments in rl_sensor.h of mmwavelink.
/**
* @brief Concatenated code for output power backoff for TX0, TX1, TX2\n
Bit Description \n
b7:0 TX0 output power back off \n
b15:8 TX1 output power back off \n
b23:16 TX2 output power back off \n
b31:24 Reserved \n
This field defiens how much the transmit power should be reduced from the maximum \n
1 LSB = 1 dB \n
If TX power boot time calibration is disabled then only 0dB back off is \n
supported. 0dB back-off corresponds to typically 12dBm power level. \n
In IWR6843 (both ES1.0 and ES2.0), uncalibrated back-off in 3dB steps is \n
supported in cases where the TX power calibration is disabled. \n
@note : For best inter-TX channel matching performance, same chirp profile and \n
same TX backoff value should be used for all the TXs that are used in \n
beam-forming
*/
rlUInt32_t txOutPowerBackoffCode;
By the upper comments, IWR6843 supports uncalibrated backoff in 3dB steps when the TX power calibration is disabled.
But when I have tested, it didn't work.
Could you let me know how I can use TX backoff with IWR6843?
Regards.
