[amsat-bb] PSAT2 Future Operations

Scott scott23192 at gmail.com
Wed Jun 26 14:57:30 UTC 2019

Thank you for the updates!

Regarding the PSK31 uplink, please advise the correct RF frequency.

At http://aprs.org/PSAT2/USER-Operations-Manual.doc, the uplink frequency
is listed as 29.401 MHz.

At https://github.com/alpov/PSAT-2/blob/master/README.md, the uplink
frequency is listed as 29.48 MHz.

At http://aprs.org/psat2.html, the uplink frequency is listed as 28.120 MHz
(in text, w/ a graphic indicating "29.XX?").


-Scott,  K4KDR


On Wed, Jun 26, 2019 at 10:20 AM Tomáš Urbanec via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Hi Paul,
> Thanks for the interest in the PSK31 transponder, as Bob already pointed
> up, the downlink audio spectrum is shared, so at 280Hz and 374Hz are
> PSK31 beacon tlm streams from camera board and transponder board
> respectively. Then every 4 minutes the SSTV signal is present so if you
> plan experiments in PSK transponder, try to stay between the beacons and
> SSTV. Description of modes you can find at
> https://github.com/alpov/PSAT-2/blob/master/README.md
> We would be glad to answer any questions about this experiments.
> We are still awaiting for any positive confirmation of downlink signal
> at 435.350MHz as for us it is still below horizon. Any audio recordings,
> IQ data or at least pictures of reception would be welcomed.
>             73! Tomas OK2PNQ and Ales OK2ALP

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