I am new to cubesats & am having decode issues. I have the Polysat CPX decoder and finally got correct keps pasted into decoder preferences>satellite.
I am using SAT-PC32 and have appropriate keps and freq data loaded. Program tracks CP-6 correctly and agrees with tracking info in CPX decoder.
Radio is IC910H in LSB mode and radio is tracking SAT-PC32 doppler freq data OK. Today (June 7), I had a decent pass with reasonable EL. Antenna are tracking CP-6 ok via SAT-PC32. I heard nothing during today's 10 min pass.
I believe I have another issue beyond not hearing signal. I am using an AEA DSP2232 tnc between IC910H and CPX decoder. It is set for 9600baud packet data from copying now defunct GO-32 BB. I believe I need to figure out how to set it up for 1200baud FSK. Is that correct?
Jim
K7EG
Jim,
In reverse order, you will need to change the DSP-2232 modem to the "1200 baud VHF." Modem 12 if you are using radio port 1, Modem 22 if you are using radio port 2.
Note that there are two transmitters which alternate, several bursts from A, then B. Mike, DK3WN, estimates the center frequency for COMM A = 437.3655 MHz and COMM B = 437.3664 MHz. Also, there is a slight frequency drift as the satellite cycles from eclipse to sunlight.
Finally, I have found that the data bursts are not quite as regular as advertised. Sometimes they come within seconds, usually every minute or so, and occasionally there may be only one or two in a 10 minute period.
Alan WA4SCA
participants (2)
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Alan P. Biddle -
James Denneny