[amsat-bb] WSJT-X FT8 QSO confirmed between W2JAZ and W5RKN on FO-29
gabrielzeifman at gmail.com
Tue Oct 17 14:18:34 UTC 2017
FO-29 and AO-7 are not FM birds
On Oct 17, 2017 9:04 AM, "Andrew Rich" <vk4tec at tech-software.net> wrote:
> I would have thought doppler would have killed a frequency dependant mode
> Your sending a hf low noise mode over an FM bird ?
> Sent from my iPhone
> > On 17 Oct 2017, at 1:47 pm, Clayton Coleman <kayakfishtx at gmail.com>
> > Some may think it is experimental but I personally find it very
> > disruptive to use certain digital modes on satellites. It is more
> > disturbing when the stations performing these "experiments" fail to
> > minimize their station ERP to a reasonable level.
> > Tonight on FO-29 I witnessed first hand how disruptive it is when a
> > station decides to experiment with MSK144 while others are trying to
> > use the shared transponder resource.
> > Some of these modes are 100% duty cycle for periods, then switch off,
> > and back on again in a sequence. This doesn't seem very compatible
> > with your typical satellite transponder.
> > For the life of me I cannot figure out why someone would even think
> > about attempting these modes on AO-7 when the transponder's more
> > sensitive nature is common knowledge.
> > 73
> > Clayton
> > W5PFG
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