[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: PCSAT2 FM Repeater Experiment

I believe I heard the control op confirm N3ZLL, if that's so then he is
trully a candidate for WAS (Worked all satellites) as I have a sat qsl from
Will in the 80's)


----- Original Message ----- 
From: "Robert Bruninga" <bruninga@usna.edu>
To: <amsat-bb@amsat.org>; <luclebla@sorel-tracy.qc.ca>
Sent: Thursday, September 29, 2005 1:24 PM
Subject: Re: [amsat-bb] PCSAT2 FM Repeater Experiment

> >>> "Luc Leblanc VE2DWE" 09/29/05
> >On the 1026 pass...i was able to hear Eric during
> >the whole pass and i realized that i was transmitting
> >at 9600BD!! when he [said] he was not listening
> >at 9k6 i guess he was referring to me...:(
> Thanks Luc and everyone else that played with us this
> morning.  As you can imagine Murphy was visiting both
> classes.  On the first pass, a single error led to
> us spending the entire pass trying to figure out
> why the Transponder was not being commanded on.
> (even though it was on) So therefore we were not
> simultaneoulsy watching the packet downlink for users.
> On the second pass, things worked, and we saw
> these calls:  WA1KAT, K1ICO, AJ3U, W8AAS...
> (plus Luc at 9600) and one other call.  A student
> walked off with the log so I'm not sure right now.
> >Even with ARISS packet OFF i was hearing packet
> >burst at 437.975
> Yes, our FM donwlink shares the transmitter with
> our side B command system so those were command
> and telemetry packets.
> The scenario here was that we had two classes
> of about 16 students each who had never seen
> PCSAT2 before.  I got to give them a 30 minute
> power point description and then I got 8 volunteers
> to man these stations:
> 1) Command station (actually that was me)
> 2) Telemetry receiver & display
> 3) Instant-Track and antenna controlller
> 4) Instant-track and voice antenna controller
> 5) Voice operator, also looking at packet screen
> 6) Voice receiver operator tracking doppler on 437.975
> 7) Internet montitor watching the FINDU web pages
> 8) APRS display monitor
> We got them to the ground station with 5 minutes to
> get familiar with their station.  ANd then the pass
> began.  Of course lots of prior planning could do
> this better, but we dont have that luxury at an
> academy where every hour of the day they are
> assigned other things.  So we have to do the entire
> PCSAT2 lecture and demo in one single class room
> period.
> THe pass 1 problem turned out to simply be the
> volume on the Voice monitor downlink receiver
> (a TS-2000 with 65 front panel controls) was
> on zero.  (My fault because I left it that way after
> last nights test).   I had only trained that student
> to tune Doppler, never mentioned volume.
> Now, because I was not hearing audio on the downlink,
> I paniced and assumed it was the command link, and
> so wasted the rest of the pass trying to re-connect
> to both the A and B sides and try the varous alternate
> command capabilities.  (Apparently it was working
> all along.  But since we had no feedback, the voice
> operator basically said nothing.
> On the second pass, it worked fine.  But this was a
> completely new class and they had even less time
> to prepare.  I was disappointed at the audio level.
> It sounded great when I tried it earlier, but seemd
> very low modulation.  Maybe the student was not
> speaking well into the mic, though it did look like he
> was holding it correctly.
> I played back the audio files that AJ3U recorded
> and there was hardly anything to hear.  By the
> way, we were only using an omni for our uplink
> so that explains our less than full quieting signal.
> But we did hear more than what his recording
> captured.  And another station said he heard it
> great through the whole pass.
> >Better luck next time
> Yes, always lessons learned.  And it is so easy to
> do when one is all alone in the shack.  It is so
> hard to do while trying to get 16 people involved.
> If anyone wants to listen on the 1530 EDT pass
> this afternoon, I will do it myself one more time
> just to confirm all the lessons leared.
> Oh, the other lesson is to REBOOT all PC's prior
> to the event.  The packet display laptop for the
> voice operator position was looking just great.
> But dead as a post.
> Bob, WB4APR
> USNA Satellite Lab
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org