All

We have been able to successfully send via PSAT2 on multiple occasions and QTHs PSK31 via PSAT2. However we have not been able to attain the holy grail of having the transponder also transmit our SSTV signals at the same time. Our experiments have involved multiple parties spread across a large geographical distance with mutual FPs, antenna types and power levels to no avail. Any helps or tips would be greatly appreciated. Tonight we decoded PSK31 from KK4YEL who was sending thru a vertical antenna as it passed overhead with N8URE attempting to send SSTV at the same time. On other occasions we have decided PSK31 from N8URE who is sending at only 5W. In all cases we have been using DopplerPSK.

On Fri, Oct 30, 2020 at 9:41 PM Stephen DeVience via AMSAT-BB < amsat-bb@amsat.org> wrote:

Today I was able to get a PSK signal through PSAT2, and it was recorded by KO4AQF in FL. I sent with a dial frequency of 29.4815 MHz and an audio frequency of 1000 Hz using DopplerPSK. It was detected at ~2650 Hz, which means the appropriate dial frequency to use is actually about 29.479 MHz. This agrees with the Brno team's website, where they say "The main function of the transponder is to receive PSK signals from 29.48 MHz uplink (passband from 29.4804 to 29.4826 MHz)."

I also measured the downlink to be about 3.6 kHz higher than 435.350 MHz.

-Stephen N8URE _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb