Spurious frequency 12.8 Mhz. DCDC Converter ?

[Sylvain]

Hello,

When I analyse the output of my radio, I see that I have a spurious frequency at 12,8 Mhz.

I supply my custom board with a fidelity power supply so no problem with that.

I think it could come from the internal DCDC, what's its frequency switch ?

How can I disable it in the SDK15 ?

Maybe it is something else but no other idea at the moment.

Thanks for the support,
Sylvain.

[Andreas]

Hi,

 

Something is definitely not right here, I would not mind having a look at your design. If you do not want to upload it here (will be visible to the public) you can register a 'private ticket' and just reference this case in it.

 

Still, in order to narrow down the source it would probably be beneficial if you could test the same application on a DK, or test your PCB with the radio test example in the SDK.

 

Best regards,

Andreas

[Sylvain]

Hi Andreas,

I will open a private post.

 

Sylvain.