IWRL6432: Is TX 2 CW mode supported?

Hi Abhiskek, thanks for the reply. 

1. We are using the power optimized mode, as with the IWRL6432 Boost. We have three DCDC Converters supplying the 3.3V, 1.8V, 1.2V. 

2. We have a spectrum analyzer with an external mixer that converts 57 GHz signals down to frequencies our spectrum analyzer can measure. 

We tested our sweep parameters (sweeping from 60 GHz with a bandwidth of approx 60 MHz) on both TXs and we get output powers that we expect. We then put the device into CW Mode (fc = 60 GHz) on TX1 and we got output powers that we expected. We then changed to CW mode on TX2 (fc = 60 GHz) and then all of a sudden the signal seemingly drops below the noise floor of the spectrum analyzer almost as if the TX is off. The only thing we changed was which TX we were using. I'll see if I can get some screenshots to supplement. 

This is a screenshot obtained with the IWRL6432BOOST EVM. Blue trace is our sweep on TX2. Pink trace is CW Mode on TX1. Green trace is CW Mode on TX2, roughly 35-40 dB below TX1. 

We then enabled CW Mode through mmWave Studio and it worked on both TX1 and TX2: 

HI Abhishek,

We also did some testing with mmwave studio and found that when using that, both TX 1 and TX 2 work without issue. When using the modified demo SW (demo SW that passes down the CW start command to the MMWave_startLink function), TX 1 seems to work, but TX 2 transmits as can be seen below.

Hi Abhishek, sorry for the late response, I have been away the past week.

By disabling the CW mode do you mean just resetting it, or do you mean disabling it and re-enabling it in the software. If it is the later, I have run into some issues trying to re-enable the CW tone after disabling it.

I have tried deinitializing using MMwave_stop and MMWave_close, as done when the sensorStop command and then calling CLI_MMWStart to restart the transmitting.

I have also tried to call MMWave_deinit in addition to the two functions above and then call mmwDemo_mmWaveInit  as done in the powerManagementTask, but this also does not seem to allow for the restarting of the CW tone.

Do you have any suggestions as to what the best way to achieve switching the CW tone off and then restarting it would be?

Just to follow up, this issue has been resolved. We found out that the ChirpTxMimoPatSel was set to 1. After changing it to 0 (and modifying the code to allow us to do so), we were able to enable CW mode on both TXs.