Help - Zero Beat

[Ed Richards]

Jim;
What you describe sounds like an AM receiver that beats against both
sidebands. In a SSSC (Single Sideband Suppressed Carrier) system, the
tone should go only from high to low and nothing past the low tone. The
missing carrier is where the tone gets too low to hear. Sometimes with a
fast AGC you can see the beat in the S-meter. Zero beat is where the
meter slows down and stops moving. This is the silence you are looking
for. It does not go up again because the other sideband is missing. Good
luck.
Ed Richards

On Fri, 24 Mar 2000 09:58:59 -0500 James E Temple
<jetemp01 at ATHENA.LOUISVILLE.EDU> writes:
> Hello,
>
> Adding to Bob's question, I have had the same thoughts.
>
> Some signals will go from a tone, to silence (zero beat), to the
> tone
> again as the dial is moved in one direction.  With a cal tone, the
> sequence seems to be silence, to a tone, to silence as the dial is
> moved.  The last example is where I am uncertain where zero beat is,
> since
> there is no silence (null) in the tone between tones.
>
> Thanks for any help and advice.
>
> Sincerely,
>
> Jim
> 73, KF4ICZ
>
>
> On Fri, 24 Mar 2000, Bob Ahrens wrote:
>
> > Group,
> >
> >     Can someone please explain the idea of zero beating a receiver
> to a known signal?
> >
> >     I know what zero beat means when it refers to two audio
> signals... simply meaning that two signals are at exactly the same
> freq., eliminating the beating effect. However, I am trying to align
> an HW-101 and there are constant references to zero beating the
> receiver to either the calibration signal or a known frequency.
> Since there is only one signal, say the 3.7 MHz cal signal, how do I
> zero beat the receiver??
> >
> > Any and all help is greatly appreciated.
> >
> > 73
> > KC2FYG
> > Bob
> >
> >
>
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