[aprssig] PCSAT2 Downlink/General Satellite Receive Question
jronan at tssg.org
Sat Apr 29 07:00:29 CDT 2006
I recently put a Eggbeater on the roof (actually its on a bracket off
the cap of the chimney) of the QTH here, doing my best not to be seen
by the neighbours when it was going up (long story). My plan is to
use it for a doppler corrected PCSAT2 downlink (Previously I was just
using an omni).
Now it seems to have made quite a difference for the 1200 baud side
as I seem to be getting far more consistent signal readings and
packet decodes, but I'm not getting anything from 9k6. I suppose I
shouldn't be surprised, but I am slightly disappointed (I was getting
the odd packet or so using the omni).
I've got a SSB UHF Pre-Amp mounted just underneath the antenna, and
I'm using Westflex 103 (http://www.whwestlake.co.uk/) coax coming
down from the pre-amp to the radio (at a guess its about 24-30 feet
of coax. I'm getting S5-S7 on the S meter of the FT-847 (0 signal
without the pre-amp).
Before I start pulling things apart, firstly should I be able to
decode 9k6 packets at S5-S7 signal levels? My doppler correction
script only runs once a second, should I increase the frequency of
that to maybe 0.5/0.25 a second?
Any other comments/suggestions appreciated.
Unfortunately, I'm not living in a very Radio Friendly Neighbourhood,
and everything I do attracts attention and questions (My last excuse
was I was fixing my satellite dish).
John Ronan <jronan at tssg.org>, +353-51-302938
Telecommunications Software & Systems Group, http://www.tssg.org
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