[BC] Frequency Measurements and 1000 Hz tone...

Tom Dimeo mwam
Wed Mar 21 15:22:23 CDT 2007


I'm really scratching my head over how to use the lower and 
upper sidebands to measure the carrier frequency of an AM 
signal when the carrier is being modulated with a tone.  As I 
understand, if you take the average frequency of the two 
sidebands all you come up with is the frequency of the tone.  
It seems to me that if you know the "exact" frequency of the 
tone then you could do it.

I'm probably missing something real simple.

Tom

** Message Separater **
>
>Glen:
>
>> is the exact frequency of the modulation of no import?
>
>Not important; take the average of the two sidebands.
>989 for lower sideband and 991 for upper and it would be 
>easy to "compute" the carrier frequency.




More information about the Broadcast mailing list