IWR6843: How to change the TX power using the configuration file.

user6424937

Prodigy 60 points

Part Number: IWR6843

Hi,

I'm a user of people counting sample application.

I want to change/decrease the TX power using the configuration file.

I think the <txOutPower> (fifth parameter at 'profilrCfg' line) can use for that.

Is this correct? If I want to decrease 6dB from default, what number must be set?

For example, in 'sense_and_direct_68xx.cfg' file:

[org] profileCfg 0 62.00 30 10 69.72 0 0 28.42 1 128 2180 0 0 24

=> [new] profileCfg 0 62.00 30 10 69.72 6 0 28.42 1 128 2180 0 0 24

Changing parameter like this will change the gain 6dB down?

BR,

over 4 years ago

0 CHETHAN KUMAR Y.B. over 4 years ago

TI__Mastermind 25835 points

Hello user6424937,

Yes, You could use this parameter to back-off Tx power, It's controllable resolution of 1dB. Yes, If you want to back-off by 6dB your configuration is right.

Thanks and regards,

CHETHAN KUMAR Y.B.

0 Nitin Sakhuja over 4 years ago in reply to CHETHAN KUMAR Y.B.

TI__Mastermind 30405 points

Hello,

The TX power back-off is specified by settings bits 0 - 23 of the above value where each of the 8 bit values corresponding to TX1, TX2 and TX3 respectively. So for 6dB back-off on all TX channels, the TX power control word would be

0x060606 i.e. 394758 (use this decimal value). Here's the corresponding profileCfg command.

profileCfg 0 62.00 30 10 69.72 394758 0 28.42 1 128 2180 0 0 24

This is defined in the mmwavelink html documentation at the following location:

file:///C:/ti/mmwave_sdk_03_04_00_03/packages/ti/control/mmwavelink/docs/doxygen/html/structrl_profile_cfg__t.html#aa5201cb7a08db920e6ba79

Thanks

-Nitin

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IWR6843: How to change the TX power using the configuration file.