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RE: RUDAK DSP weak signal test



Amen. Thank you for taking the extra time. We don't feel so bad when we know
someone is actually doing something during that segment. These postings will
also increase interest in the RUDAK concept and systems, so that when the
time comes to open things up a bit , you'll have more informed people
interested in getting involved.
73 & keep up the good work
Gunther Meisse
W8GSM


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
Behalf Of Vince Fiscus, KB7ADL
Sent: Friday, August 02, 2002 11:40 AM
To: amsat-bb@AMSAT.Org
Subject: Re: [amsat-bb] RUDAK DSP weak signal test


Thanks Jim, I glad to see updates like this posted.  It make us feel like
we're more involved with what is happening.


At 08:56 AM 8/2/02 -0600, Jim White <jim@coloradosatellite.com> wrote:

>At the end of the RUDAK window today we left one of the DSP modulators on
>generating a signal 33 dB below the 9k6 FSK signal at 11.1 MHz in the IF
>passband.  At the WD0E station I can detect that carrier consistently at
>the beginning of the RUDAK window or a range of about 52k km. Of course as
>the range drops it's much easier to hear.  See
>http://www.coloradosatellite.com/Papers/RUDAKOps/SDish.htm
>for the receive equipment here.
>This is a pretty weak signal and if you can detect it you are hearing
>pretty well.  Of course it's in the digital passband only during the RUDAK
>window.
>
>We will try to leave it on while we continue testing the other DSP
>functions and software, all of which are aimed to creating links to RUDAK
>that can be used with modest equipment.  Unfortunately we can't grantee it
>will be there all the time but will at least try to announce when it
>wasn't on after the fact.
>
>Other work today involved the convolutional coding and scrambler settings
>on the 153k6 modulator on RUDAK-A.  All tests performed indicated
>everything is working ok but we ran out of time to finish everything
scheduled.
>
>Jim
>wd0e@amsat.org
>jim@coloradosatellite.com
>
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