[AMRadio] One pic is worth a thousand...

[donroden at hiwaay.net]

Spread the horizontal timebase out to where you can see one cycle of carrier.
If you see two dim cycles, it could be the first harmonic   Run it  
through an antenna tuner as a low pass filter then look again.

Don W4DNR




Quoting CL in NC via AMRadio <amradio at mailman.qth.net>:

> If any of you are scope pattern interpreters, I hope you can give me  
> a read on a pattern that I have on both an AF67 and AF68.  With the  
> TX keyed, the unmodulated trace on the scope has both a bright  
> carrier displayed of 3cm, inside or superimposed on  a dimmer  
> carrier display of 5cm.  There is no ultrasonic oscillation in the  
> audio stage that could generate this, and it is not a scope retrace.  
>  Is this an indication of a fundamental carrier freq, the darker  
> trace,  along with a harmonic of lesser power and higher freq, the  
> higher freq making a brighter pattern?  Or nothing?  I do have a  
> pic, but can't attach it here.
>
> Charlie, W4MEC in NC
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