Sure Steve, this is something a lot of ops. never get. I'll try to
explain, lets say you have a rig with no offset on CW. Transmit and
Receive are on the same freq. like 7Mhz You call CQ and another station
answers you on 7Mhz, and you with your rx zero beat to 7Mhz can't hear
him, in order to hear the tone you need to move your rx 600hz off him.
Then you'll hear a 600hz tone, however if you then xmit on that freq.
you'll end up leap fogging up the band so your xmit must stay down on
7Mhz. Here the transmit is 7.000.00 and receive is 7.000.60 the 600hz
offset ends up to be a 600hz audio tone. An offset can be either up or
down from the transmitted carrier this depends on the sideband filter
used for CW receive. To listen to this on your rig, tune in a very strong
carrier CW or anything, then tune the pitch down in tone till you can't
hear it at all this is "Zero beat" or zero offset, continue tuning in
same direction and you may hear the carrier much weaker on the other side
of zero beat.
The sidetone of a rig is not the received tone but a tone generated in
the rigs audio when it is keyed on CW transmit. On some rigs this tone
can be turned on the same time the rig is receiving this is the "spot
tone" another spot method is to switch the receiver to the offset freq.
and zero beat the carrier.
Hope this helps 73 AA8VE -Jeff-
On Thu, 23 Sep 1999 17:32:53 +0100 "Steve Baron"
<SteveBaron@starlinx.com> writes:
>
> COnfused me.
>
> Isn't the sidetone frequency simply the pitch of the sidetone and
> not the
> pitch of the beat note that you listen to ?
>
> What am I missing ?
>
> >>
> >>
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