[amsat-bb] PSAT- transmission sequence

[Mike Miller]

Is the uplink on 28.120 + audio or does the psk31 signal need to 
be at 28.120 i.e. 28.119 USB with 1000 Hz psk31?

I copied some beacons but didn't see anything from my attempt to 
uplink.

73
Mike kc9doa


On 27 May 2015 at 10:41, Robert Bruninga wrote:

> PSAT PSK31 is always in AUTO mode.  It will come up whenever it
> hears PSK31
> on the 28.120 uplink.
> 
> Bob, WB4APR
> 
> On Wed, May 27, 2015 at 9:54 AM, David G0MRF <g0mrf at aol.com>
> wrote:
> 
> > Congratulations Bob and USNA on another successful
> spacecraft.
> >
> > I listened for the first time this morning and could hear the
> beacon and
> > transponded PSK31 without any trouble.
> >
> > But I was not expecting the 435.350 carrier to stop every now
> and again.
> >
> > What determines if the carrier is on or off. - Beacon
> timing.- OK, but is
> > the transmitter also PSK activated in someway? Or is it a
> timer.
> > Very nice for saving power.
> >
> > Thanks
> >
> > David  G0MRF
> >
> >
> > -----Original Message-----
> > From: Robert Bruninga <bruninga at usna.edu>
> > To: AMSAT BB <amsat-bb at amsat.org>
> > Sent: Sun, 24 May 2015 17:58
> > Subject: [amsat-bb] PSAT Status (day 4)
> >
> >  PSAT  PSK31 435.350 MHz FM downlink is full quieting with 6
> bars using a
> > decent
> > UHF Yagi.
> >
> > But we have not seen any users other than those using the
> 28.120
> > PSK
> > channel on HF normally.  We welcome people to experiment with
> it.
> > Everyone
> > within the 28.120 to 28.123 MHz ten meter passband will be
> > uplinked and heard
> > on the 435.350 MHz downlink.
> >
> > The Naval Academy's PSAT seems healthy with
> > plenty of power (we are
> > keeping the APRS digipeater off to allow max power for
> > PSK31).
> >
> > PSAT 's radio and packet system are a simple $250 APRS
> > trackerhttp://www.byonics.com/mtt4b sent to space.  The PSK31
> transponder is
> > a
> > single 3.4" square circuit board made by Brno Universtiy in
> the
> > Czech
> > Republic.  The CPU for controlling bulletins and timing is
> a
> > simple
> > Parallax Basic Stamp.
> >
> > PSAT is actually only about a 1U cubesat but in
> > a 1.5U package since the
> > flight was available and it gave us more power for our
> > NON-SPACE solar
> > cells.  We are using standard silicon that are only half as
> > efficient as
> > multi-junction cells, but only cost 1% as much.
> >
> >
> >
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