[amsat-bb] Re: Delfi-C3 report

[wouter weggelaar]

Hi Stefan,

Thank you for your observations!
We are still working on the issues and Wouter Jan Ubbels PE4WJ will
post a status update when we have more news about Delfi-C3 (DO-64)
The startup behavior you mention is indeed caused by the rapid warming
up of the internal electronics by switching on the PA. This is normal
and was designed for.
Delfi-C3 is too small to accommodate an ovenized crystal and this also
consumes too much power.

73

Wouter Weggelaar PA3WEG
Delfi-C3 Team


On Thu, Jun 12, 2008 at 4:16 AM, Stefan Wagener
<stefan_wagener at hotmail.com> wrote:
> My recent observations:
>
>
>
> The satellite is still experiencing abrupt termination of  telemetry
> transmission. During ascending passes telemetry is transmitted once
> satellite comes out of eclipse. Initial signal sometimes rough and
> 500Hz-1Khz above nominal frequency. Rapid warming will bring signal
> frequency down to +450 Hz. Sometimes satellite telemetry starts repeatedly
> after 30 to 40 packets, other times it runs for 100 to 300 packets before
> abruptly stopping.
>
>
>
> Will wait for the Delfi-C3 team to report on their attempts on working this
> one out.
>
>
>
> However, the satellite is working and active.
>
>
>
> Stefan, VE4NSA
>
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