Almost everyone in North America is operating at 5 kHz up from the bottom of the downlink passband. I set my WSJT-x at 435.6115. Once in a while I see somebody CQing beyond the passband, more than 3 kHz up from that frequency, but I don't know if they actually work anybody.

--

Mark D. Johns, KØJM
AMSAT Ambassador & News Service Editor
Brooklyn Park, MN USA   EN35hd

-----------------------------------------------

"Heaven goes by favor; if it went by merit,

   you would stay out and your dog would go in."

    ---Mark Twain

On Tue, Oct 11, 2022 at 2:53 PM Mike Swiatkowski <mjswiatk@gmail.com> wrote:

I read a message from Jerry, N5EKO, that the gentleman's agreement is to operate 3-10 kHz above the bottom band edge.  WSJT-X may show you about 2.5 to 3 kHz of passband on a typical computer screen. So, that 7 kHz seems a bit much to monitor all at once. I think it'd be easier to just pick a standard calling offset from the bottom band edge to monitor when the satellite is passing.  If we all started listening to +3 kHz to +5.5 kHz USB FT4 mode from the band edge it's a simple rule of thumb and we know where to listen to those signals seemingly under the noise floor.  Many users don't have a band scope.  So, a designated offset would be helpful.

Example:  RS-44  Satellite downlink passband is 435.61 - 435.67 MHz

Listen or CQ by setting SATPC32 satellite (not rig since it changes due to doppler) frequency to 435.613  USB mode and choosing FT4 on WSJT-X

so, the satellite (not rig) downlink frequency for 

FO-29 = 435.803

AO-07  = 145.928 

HO-113 = 435.168

and so forth for other satellites.  Maybe the XWs, CAs, JO-97, and EO-88 birds would be good for FT4, too.

Mike, AA9VI

EN52

-----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at
https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org
To unsubscribe send an email to amsat-bb-leave(a)amsat.org
Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org