[amsat-bb] PSAT- transmission sequence

[Mike Miller]

Okay, I must be misunderstanding how this works. I thought the 
down link was FM like the beacon which for me is at 308 Hz on 
the waterfall.

73
Mike kc9doa

On 27 May 2015 at 12:37, Mike wrote:

> Mike, I used my day to day DM780 settings. Dial setting was
> 28.120 and I
> just picked the middle of the waterfall to TX. 
> 
> On the RX, you need to keep the cursor moving as the trace
> moves quickly. It
> does not stay in one place like normal psk
> 
> 73, Ted
> K7TRK
> 
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of
> Mike Miller
> Sent: Wednesday, May 27, 2015 12:13 PM
> To: Robert Bruninga
> Cc: amsat bb
> Subject: Re: [amsat-bb] PSAT- transmission sequence
> 
> 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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> 
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