From jsouza@clari.net Sat Feb 24 08:28:17 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!jsouza
From: jsouza@clari.net (Jen Souza)
Newsgroups: comp.dsp
Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb24.082817.9019@clari.net>
Date: Sat, 24 Feb 1996 08:28:17 GMT
Organization: ClariNet Communications Corp
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X-Newsreader: Netscape 1.1N
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How the 14 ASCII characters per node are encoded into the record groove.

The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20).
Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'.

Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword.

-- 
=== Jen Souza ===
Dept of Electrical Engineering, ClariNet Communications Corp
"Do not worship the copy."

From jduarte@stanford.edu Mon Feb 26 09:43:17 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!jduarte
From: jduarte@stanford.edu (Jen Duarte)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb26.094317.5955@stanford.edu>
Date: Mon, 26 Feb 1996 09:43:17 GMT
References: <1996Feb24.082817.9019@clari.net>
Organization: Stanford University Computer Systems Lab
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In article <1996Feb24.082817.9019@clari.net>, jsouza@clari.net (Jen Souza) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

-- 
Jen Duarte -- Stanford University Computer Systems Lab
"The hatch is open. Is anyone listening?"