[amsat-bb] Re: RAFT PSK-31 is enabled

[Robert Bruninga]

> Just to confirm my understanding, a CW signal will also be 
> passed trough the
> satellite in this mode....

Yes, any narroband signal could be heard.
Bob

> 
> Roger
> WA1KAT
> 
> ----- Original Message ----- 
> From: "Robert Bruninga" <bruninga at usna.edu>
> To: "'Bob Bruninga '" <bruninga at usna.edu>;
<amsat-bb at amsat.org>
> Sent: Monday, January 29, 2007 5:45 PM
> Subject: [amsat-bb] Re: RAFT PSK-31 is enabled
> 
> 
> > RAFT PSK-31 passes are not beginning to occur around
midnight in
> > the northern heisphere.  Analysis shows RAFT didn't get
above 40
> > C over the weekend when the PSK-31 transponder was on.
> >
> > Although the 10m receiver noise is hearable in the 145.825
FM
> > downlink, no one has reported hearing a 10m signal yet.  So
this
> > experiment continues until we hear a big gun.  Anyone is
> > authorized to bring up the tranponder as noted in the
original
> > post below.
> >
> > The one thing we do know is that RAFT is most reponsive to
being
> > brought up in the dark.  Do not even bother during the day.
Its
> > command receiver appears to be distorted then and will not
come
> > up.
> >
> > Bob
> > WB4APR
> >
> > > -----Original Message-----
> > > From: amsat-bb-bounces at amsat.org
> > > [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Bob
Bruninga
> > > Sent: Saturday, January 27, 2007 11:25 AM
> > > To: amsat-bb at amsat.org
> > > Subject: [amsat-bb] RAFT PSK-31 is enabled
> > >
> > > RAFT lives!
> > >
> > > Throught overnight sleepless efforts, RAFT was finally
> > > commanded into PSK-31 mode by the combined efforts of
> > > DK3WN, PA3GUO, and PE1ITR and others.
> > >
> > > The problem has been that the RAFT command receiver is
> > > deaf when the bus voltage is over 8.1 volts.  But at
> > > night in the dark, it works OK.  SO here is how to work
> > > RAFT PSK-31. (we have heard no signals yet, and do not
> > > know if the HF wire antenna got deployed.  So we welcome
> > > MAX power on the 28.120 USB PSK-31 uplink.  Listen with
> > > FM on 145.825 downlink.  It is very weak and needs a
> > > beam.
> > >
> > > Someone in the footprint needs to bring up the PSK-31
> > > transponder with their own TNC command on 145.825
> > > uplink.  Just send C RAFT.  This connect request packet
> > > will activate the PSK-31 transponder for about 90
> > > seconds.  You will not get an ACK however.
> > >
> > > You may TX on 28.120 USB PSK-31 with max power throughout
> > > the pass until we find out if the HF RX is working.
> > >
> > > Oh, notice that the "C RAFT" probably will not work in
> > > the daytime since the BUS voltage is above 8.1V and so
> > > the command receiver is deaf.  But you are welcome to try.
> > >
> > > Good luck!
> > > I am on slow dialup this weekend, so will have little
comment.
> > >
> > > Bob, Wb4APR
> > > USNA RAFT command station.
> > >
> > > ---- Original message ----
> > > >Date: Sat, 27 Jan 2007 12:56:52 +0100 (CET)
> > > >From: "Rob Hardenberg" <rob at itr-datanet.com>
> > > >Subject: Re: AW: AW: RAFT trials Jan 27 night over Europe
>
> > > >
> > > >I was listening on the psk31 downlink the 435UTC pass
with
> > > >the psk decoder but couldn't also detect your signal. The
> > > >2m downlink is OK with spinrate qsb between S4 and S9+.
> > > >Its noisy with computer signals in the waterfall display,
> > > >but the signal strenght is good for psk demodulation.
> > > >
> > > >I didn't try the 10m uplink yet but if its ok the I will
> > > >try tomorrow 28/1. I use also a dipole and 100W.
> > > >
> > > >The 6:10UTC pass was not tracked here because of
sleep.....
> > > >
> > > >!S 04:35:37 !RAFT>BEACON,SGATE/1
> > > :T#375,081,002,036,036,107,10000000,999
> > > >!S 04:36:38 !RAFT>BEACON,SGATE/1
> > > :T#378,081,002,037,036,105,10000000,999
> > > >!S 04:36:58 !RAFT>BEACON,SGATE/1
> > > :T#379,081,002,036,035,104,10000000,999
> > > >!S 04:37:18 !RAFT>BEACON,SGATE/1
> > > :T#380,081,002,036,035,104,10000000,999
> > > >!S 04:37:37 !RAFT>BEACON,SGATE/1
> > > :T#381,080,002,037,036,103,10000000,999
> > > >!S 04:37:47 !RAFT>BEACON,SGATE/1 :>RAFT is on 145.825  US
> > > Naval Academy
> > > >!S 04:37:58 !RAFT>BEACON,SGATE/1
> > > :T#382,080,002,036,035,103,10000000,999
> > > >!S 04:38:17 !RAFT>BEACON,SGATE/1
> > > :T#383,081,002,036,036,102,10000000,999
> > > >!S 04:38:37 !RAFT>BEACON,SGATE/1
> > > :T#384,081,002,036,035,101,10000000,999
> > > >!S 04:38:57 !RAFT>BEACON,SGATE/1
> > > :T#385,080,002,036,035,101,10000000,999
> > > >!S 04:40:47 !RAFT>BEACON,SGATE/1 :>RAFT is on 145.825  US
> > > Naval Academy
> > > >
> > > >73 Rob PE1ITR
> > > >
> > > >Mike Rupprecht schreef:
> > > >> Hi,
> > > >>
> > > >> 0435UTC pass:
> > > >>
> > > >> RAFT PSK transponder was ON for 98 seconds.
> > > >> I could not hear my own signal. Worked with (only)
> > > >> 100watts and dipole /vertical R6000 antenna. Downlink
> > > >> is very noisy but we can see the spin rate.
> > > >>
> > > >> I think we need big guns......
> > > >>
> > > >> 73, Mike
> > > >>
> > > >> If you connect to RAFT, you will never get an answer
> > > >> from the satellite  TNC. So it is important to
DISCONNECT
> > > >> the own TNC.
> > > >>
> > > _______________________________________________
> >
> > _______________________________________________
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> of the author.
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