[amsat-bb] Having Issues with UISS/Soundmodem for ISS contacts.. (Long)

Paul Stoetzer n8hm at arrl.net
Tue Feb 14 19:06:02 UTC 2017

W5PFG has also reported problems getting the ISS to digipeat packets
sent by his IC-9100. I'm not sure if he ever solved them.


Paul, N8HM

On Tue, Feb 14, 2017 at 2:04 PM, JoAnne K9JKM <k9jkm at comcast.net> wrote:
> Hi Steve,
>> ... 3 memory channels in the 9100, one low, one center, and one high on
>> the ISS 70cm side. (437.500, 437.550, & 437.60)
> You need to adjust your tuning steps separately for TX and RX for Doppler
> correction. Your current configuration is taking to big of a step. Patrick
> WD9EWK made a list of 5 Doppler corrected frequencies which he stores in
> memory. As the orbit progresses over your QTH start with Memory #1 and work
> your way on up through the frequencies in memory. He has a graphic file of
> his frequency table posted at:
> https://twitter.com/WD9EWK/status/793644904916193281/photo/1
> Patrick's recommended steps work well for me. I find I spend only a little
> time on memory slot 1 and slot 5. Memory slots 2, 3, 4 are what I end up
> stepping through most often during a pass.
> Also, packet routing add-ons such as WIDE, etc. are not needed. CQ VIA
> RS0ISS or CQ VIA ARISS keeps your packet short, less error prone, and more
> likely to be digipeated.
> I'll be looking for your callsign via the ISS (although toward the east I
> have a pretty big obstruction but I sometimes get through it).
> --
> 73 de JoAnne K9JKM
> k9jkm at amsat.org
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