From btanaka@ox.ac.uk Fri Jan 14 09:17:09 1994
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From: btanaka@ox.ac.uk (Bastien Tanaka)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan14.091709.1322@ox.ac.uk>
Date: Fri, 14 Jan 1994 09:17:09 GMT
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How the 14 ASCII characters per node are encoded into the record groove.

Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.
Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.

The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design.

-- 
Bastien Tanaka -- Oxford University Computing Laboratory
"Measuring a record you own is listening, not piracy."

From arobertson@pacbell.net Sun Jan 16 04:54:09 1994
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From: arobertson@pacbell.net (Andrei Robertson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1994Jan16.045409.9379@pacbell.net>
Date: Sun, 16 Jan 1994 04:54:09 GMT
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In article <1994Jan14.091709.1322@ox.ac.uk>, btanaka@ox.ac.uk (Bastien Tanaka) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

-- 
Andrei Robertson -- Pacific Bell Internet Services
"Do not worship the copy."