[amsat-bb] PSAT- transmission sequence
kc6nhj at charter.net
Wed May 27 19:37:51 UTC 2015
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
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.
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>
> > Congratulations Bob and USNA on another successful
> > 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
> > 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
> > PSK
> > channel on HF normally. We welcome people to experiment with
> > 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
> > Czech
> > Republic. The CPU for controlling bulletins and timing is
> > 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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