[OZ4]

Here's my cool toy. 
I have always wanted a new scope.  I just bought one of these thinking the price of everything is going to go nuts. It's amazing how much you get now for the money.

https://www.jameco.com/z/SDS1202X-E-Sigl...83191.html

It has a voltmeter and frequency counter in it. I sure all new scopes do.  But the SDR radio I have does a much better job of showing a mixer oscillator frequency with all it's unwanted products.

   

Here's a SDR radio short video showing the entire AM Broadcast band with all the station carriers. 
https://www.youtube.com/watch?v=GVOdsgZFbQI

Here's another vid showing the local oscillator moving while tuning.  It appears and moves at the right side of his monitor screen at 2:06 minutes in. 
Just by connecting a small loop coil to the antenna port and parking next to a osc mixer it will reveal all.
https://www.youtube.com/watch?v=VLKIShZW1fI