I've been trying to decode the 1.2k BPSK telemetry from MYSAT-1 (44045) without success. I'm using UZ7HO's SoundModem set for BPSK AX.25 1200 bd. The SDR is set to USB with 4 KHz bandwidth and the signal is strong with a 25 dB SNR. The received signal is right in the center of the soundmodem's waterfall between the upper and lower indexes for that BPSK mode. I'm obviously missing something here!
73, Ken, W7KKE
Hi Ken!
Things certainly sound right from your description, but just for comparison sake here's an image of a MYSAT-1 packet as I was decoding from a recording some time ago:
https://www.qsl.net/k/k4kdr//images/mysat-1--iq-replay.png
... you might also want to check the "Modem Setttings" in UZ7HO SoundModem and make sure that "non-AX25 filter" is NOT checked. FYI, I normally leave "KISS Optimization" checked and "PreEmphasis filter" with "All" checked.
-Scott, K4KDR
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On Tue, Feb 19, 2019 at 4:38 PM Ken Swaggart k.swaggart@charter.net wrote:
I've been trying to decode the 1.2k BPSK telemetry from MYSAT-1 (44045) without success. I'm using UZ7HO's SoundModem set for BPSK AX.25 1200 bd. The SDR is set to USB with 4 KHz bandwidth and the signal is strong with a 25 dB SNR. The received signal is right in the center of the soundmodem's waterfall between the upper and lower indexes for that BPSK mode. I'm obviously missing something here!
73, Ken, W7KKE
participants (2)
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Ken Swaggart -
Scott