Operate the PCSAT-2 PSK repeater (tips & tricks!).

Hello All,

Today I saw 2 stations via de PCSAT2 PSK repeater.
I have e-mailed the stations that I have received them, and
asked some operation info.
Read the info (from G3PLX) below (tnx to Peter for the info!)..

73's Cor PD0RKC
The 29MHz transmitter is USB on 29401.0 kHz, with
the PSK31 software sending an audio tone
between 500Hz (at the start of the pass) and
1700Hz (at the end of the pass).
So my radiated transmission is PSK31 carrier starting
at 29401.5 kHz and ending 29402.7 kHz.
The receiver in PCSAT2 is USB on 29401.1kHz, so it
receives the signal from
me (now with zero Doppler on exactly 29402.1 kHz) to
give 1000Hz audio tone in the -
speaker (except there is no speaker on the satellite!).
This 1000Hz tone is FM-modulated to the 435.275MHz -
carrier in the satellite transmitter, and although the FM
carrier you receive moves with +/-10kHz Doppler,
the FM modulation has NO Doppler shift and you receive
the PSK31 signal without needing any correction.
Also, I receive it the same, so if there is any frequency error when I receive my OWN signal, I make a correction to the frequency of the uplink audio tone so that you see no Doppler shift at all.

pd0rkc – Sat, 2005 – 08 – 13 08:29

Mail from Robert Bruninga!

Hello All,

I just have received e-mail from Robert Brunninga.
Well PSK repeaters stays on!

73's Cor PD0RKC
We hope to keep the PC2PSK transponder on all the time
except for when there may be a school contact on ISS.
So get ready to work it all the time. It should be fun with
many many users. de Wb4APR, Bob

Submitted by pd0rkc on Sat, 2005-08-13 09:40.

SWL mode PSK31

For simple reception of PSK31 without TNC.I recommend soundcard freeware-RXpsk31 by ON6MU creator of UISS.A complete program with helpfiles and the ability to save text and waterfalls as files/BMP.Very user easy and optional configurations.The program also includes simple diagrams for Isolation cables for sound card input and radio RX output.Best of all it is free.Website http://users.belgacom.net/hamradio/ I hope this is helpful to readers and I have also found a preamp helpful too.73 de KI4JVK

Submitted by KI4JVK on Sun, 2005-08-14 01:22.

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