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Re: RAFT PSK-31 is enabled



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

Roger
WA1KAT

----- Original Message ----- 
From: "Robert Bruninga" <bruninga@usna.edu>
To: "'Bob Bruninga '" <bruninga@usna.edu>; <amsat-bb@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@amsat.org
> > [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Bob Bruninga
> > Sent: Saturday, January 27, 2007 11:25 AM
> > To: amsat-bb@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@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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