How to measure CW signal of 2.4G as a frequency meter?

[daoms]

I try to use 52832 as a frequency meter to measure the bluetooth central frequency to do crystal trimming.

The target is  a CW(continous wave) signal, like 2441MHz,which can be easily measured with a spectrum analyzer or a frequency meter in the precision of 1 or 2 kHz.

So I want to use 52832 to replace that spectrum analyzer or frequency meter ,just for simple production bluetooth crystal trimming.

Is it able to do that? If so ,how?

Thanks.

[ovrebekk]

Hi

You can set the nRF52832 in a continuous wave mode where it generates a constant carrier on one of the supported channels, but the resolution is only 1MHz, and the accuracy is set by the 32MHz crystal used. 

Normally these crystals are only required to have an accuracy of +/- 50ppm or better, which means that a carrier at 2.4GHz could have up to 120kHz drift in one direction or the other.  

So I don't think the nRF device is able to do what you need. 

Part of the reason spectrum analyzers are expensive is the level of accuracy and precision they must be built to in order to be useful for RF testing. 

Best regards
Torbjørn