Radio Test stops responding when TX modulated signal at 99% duty cycle with nRF52 Development Kit

[Than]

I am trying to transmit a modulated carrier with a high duty cycle but it does not work

the same command works with the default duty setting (50%). 

The cli freezes when I send the command "start_tx_modulated_carrier" after I changed the duty cycle from 50% to 99%

 

I use the nRF52 Development Kit

 

Firmware:

radio_test_pca10040.emProject

from ...\nRF5SDK15209412b96\nRF5_SDK_15.2.0_9412b96\examples\peripheral\radio_test\pca10040\blank\ses

 

Here are the commands

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.2.0%2Fnrf_radio_test_example.html

[Andreas]

Hi,

 

The start_tx_modulated_carrier command does not accept a duty cycle, this is the start_duty_cycle_modulated_tx. Either way I am not able to reproduce, the CLI does not freeze. Are you using the prebuilt hex file that comes with the SDK or have you modified it in any way? Have you made any modifications to the DK?

 

Best regards,

Andreas

[Than]

Hi Andreas,

I got it working now. I just have to send the "cancel" command when switching modes.

I noticed that "start_tx_modulated_carrier" draws more current than "start_duty_cycle_modulated_tx 99."  What is the difference? Is "start_tx_modulated_carrier" transmitting at 100% duty cycle?

thanks,

Anh