[BC] Frequency Measurement detector...

[Thomas G. Osenkowsky]

I still have my BC-221 Heterodyne Frequency Meter. As I recall, there was a
question on the FCC Second Class license test about interpolating the dial
reading with the two intersecting readings in the book :-)

Tom Osenkowsky, CPBE

>The most common and reliable method for off-air frequency measuring 
>is what is called the heterodyne method.  In this case you tune a 
>receiver to the desired signal and then zero-beat the signal with a 
>local signal generator connected to the receivers antenna input 
>through whatever padding is required.