IWR1843: Sudden level changes

Hello.

We are looking into this, please give us a few days to provide a response.

Sincerely,

Santosh

Hello Santosh, 

Thank you and I'm waiting for your response. 

Also, FFT peak level always goes up by 2-3dB.

If the power is turned off and then turn it back on after a while, the level will return to its original level. 

Best regards, 

Shoko 

Hi,

Sorry for the delayed response. Which demo are you testing with IWR1843?

The change cannot be because of temperature as you have been observing only for 30mins. Gain changes can happen with temperature only when temperature changes by 40 degrees, 

Another reason that could contribute to change is if periodic calibration is enabled. As the minimum step for the calibration would be 2dB, any change in calibration could result in the change in the amplitude. If you can let me know the demo you are using, I can check if the periodic calibration is enabled.

Regards

Hello Abhishek, 

Thank you for your response. 

The radar on the market uses mmWave demo of mmWaveSDK version 03.04.00.03. 

Thanks, 

Shoko 

Hi

You can use the IWR1843 demo from the below location

radar_toolbox_2_20_00_05\source\ti\examples\Out_Of_Box_Demo\prebuilt_binaries

Let me know if you see the changes in the level with this version

Thanks

Hello Abhishek, 

Unfortunately, since the radar is a commercial product, other demo binary file cannot be written to it. 

Are you talking about self-calibration mentioned in the thread below? 

e2e.ti.com/.../5472317

Does self-calibration work on mmWaveSDK version 03.04.00.03 by default? 

Please advise. 

Regards, 

Shoko