nanovna-v2 / NanoVNA2-firmware

Firmware for NanoVNA V2
https://nanorfe.com/nanovna-v2.html
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No signal generated above 140MHz #82

Open supergps1 opened 1 year ago

supergps1 commented 1 year ago

I have a SAA2 version. Recently it stopped generating any signal above 140MHz. Took me a long time to figure this out.

vna

I am not sure if this issue occured after a firmware update.

Now, in code, I see that ADF4350 is used to generate signals above 140MHz, and Si5351 is used below it.

I also see that there is a code to power down adf4350 below 140MHz.

This is essentially a request to help for debug. two parts:

1) is there a known issue in keeping adf4350 powered up even when required freq is below 137/140MHz? Can I keep it powered up always wiithout negatively affecting measurements?

2) Is there a way to identify if I've shot adf430?