Re: SSB reception
- I think I should clarify. :)
Only if you bypass the IF filter and tune the SSB signal so that you
can hear it clearly will the offsets given below work. 40M is the
special case. If you can hear the SSB signal on 40M in the IF passband
of the ATS rig, your transmit freq will be OK for the other station to
hear you. (By changing the firmware one can make 80M do this as well.)
I really should have combined Solution 1 + Solution 2 below. You can't
do Solution 2 with out Solution 1 except on 40m.
--- In AT_Sprint@yahoogroups.com, Michael Harnage <w1mt@...> wrote:
> Regarding SSB reception and cross mode operation with ATS rigs.
> The ATS3 does support cross mode operation and SSB reception. It did
this by doing two things.
> FIRST: It switched out the crystal filter providing for a wider
bandwidth to allow listening more comfortably to SSB.
> SECOND: It calculated where to transmit so that the SSB station
could hear the signal.
> Post ATS3 rigs don't have the capability to switch out the crystal
filter and it's probably not a good idea to jumper them out as the
impedance transitions (if that's a concept, hi hi) would be way out of
whack. This is why the calculations to put the transmit on the correct
freq while in wide mode no longer exist -- there is no wide mode.
> Solution 1: One could add a wide mode that would do the calculations
but not do the crystal bypassing. This would result in poor audio but
cross mode would be possible.
> Solution 2: Use xit mode (or split if using my f/w) and manually do
the same thing as the calculations would do.
> 80M - set your Tx to 1200Hz lower than Rx
> 40M - do nothing, Tx already on the SSB signal
> 30M - no SSB here so ignore.
> 20M - set your Tx to 1200Hz higher than Rx
> 17M - set your Tx to 1200Hz higher than Rx
> 15M - set your Tx to 1200Hz higher than Rx
> I think I've got this right...