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RE: more AO40 status



Mark, Wayne, All,

Here are some snips of Peter Guelzow's status messages concerning the V-TX.
This is all I could find in my archives:



This message received on Jan. 6, 2001:
Subject: [amsat-bb] AO40: V-TX test
>
>Dear All,
>
>The V-TX was switched On on HiGain antenna for 1 MA count between 17:31
>utc and 17:35 utc in the perigee pass over Australia by VK5AGR. The
>temperature of the transmitter rised from 16.6 to ~28C, but Graham
>could not detect any AO-40 telemetry signal on 2m.
>
>Unfortunately, the telemetry he was receiving on S band at the time of
>this test was not error free and therefore some good telemetry might be
>missing.
>
>Probably the V-TX needs to be tested again in the next few orbits.
>
> <snip>

This message was received on Jan. 15, 2001:
Subject: [amsat-bb] AO40: Update 2000-01-14
>
>Dear All,
>
>here some updates to Karl's report from January 07.
>
>* V/U/L1 Receiver *
>The V-band, U-band and L1 receivers are working OK on the HiGAIN
>antennas, but none of them is receiving signals with the OMNI antennas.
>Either the OMNI antennas are damaged or the cabling or the antenna
>relays.
>
>* V-TX *
>The V band transmitter was tried several times on HiGain antennas,
>because we know they are working OK with the receivers. No beacon signals
>were heard, but telemetry might indicate that the TX is working. Further
>tests will be conducted, including trying the V-TX again with the OMNI
>antennas.
>
>* U-TX *
>No tests have been yet conducted on the U-band TX, but it is planned to
>also test the U-TX again on HiGain and Omni antennas once the spin is
>reduced and the heat pipes start working again.
>
> <snip>

Regards,
K3TZ

> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of KB9KHM
> Sent: Thursday, July 12, 2001 7:05 PM
> To: amsat-bb@AMSAT.Org
> Subject: Re: [amsat-bb] more AO40 status
>
>
> I remember (and maybe incorrectly so) that there was a message
> from the command
> team around the time of the first experimental transponder usage
> that they were
> planning to do more testing on the V and U band transmitters.  I
> don't ever
> remember hearing that this test was conducted.  Based on this,
> shouldn't the
> status for the U band transmitter be 'more tests to do' instead
> of 'failed'.
> Does anybody have any knowledge of the U band transmitter being
> turned on other
> then the initial attempt right after the launch?
>
> I can't help but think that either the AO-40 quick status is
> wrong with regard
> to the U band TX, or that I missed some news about it some where
> along the way
> - which is entirely possible.
>
> Mark McGregor - KB9KHM
>
>
> Estes Wayne-W10191 wrote:
>
> > Another interesting item in the AO40 status summary is the U and V
> > transmitter status.
> >
> > Not surprisingly, the U transmitter status is "failed" because
> it was never
> > heard after launch.
> >
> > But the V transmitter status is "more tests to do".  That's interesting
> > because I thought it had already been tested unsuccessfully with the
> > high-gain antenna.
> >
> > The obvious question is, what additional V-band transmitter tests remain
> > before the transmitter is conclusively judged to be "failed"
> (or recovered
> > if we are very lucky).
> >
> > Wayne Estes W9AE
> > Mundelein, IL, USA
> >
> > ----
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>
>
>
> ----
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