From mnovak@earthlink.net Wed Jun 14 06:39:16 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!mnovak
From: mnovak@earthlink.net (Mei Novak)
Newsgroups: comp.dsp
Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun14.063916.9192@earthlink.net>
Date: Wed, 14 Jun 1995 06:39:16 GMT
Organization: EarthLink Network
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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'.

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

-- 
Mei Novak | mnovak@earthlink.net
PGP Key fingerprint: 4857 7F16 B618 EAB5
"Keep the channels open."

From jwatanabe@unam.mx Thu Jun 15 01:00:16 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!jwatanabe
From: jwatanabe@unam.mx (Joachim Watanabe)
Newsgroups: comp.dsp
Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Jun15.010016.6149@unam.mx>
Date: Thu, 15 Jun 1995 01:00:16 GMT
References: <1995Jun14.063916.9192@earthlink.net>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1995Jun14.063916.9192@earthlink.net>, mnovak@earthlink.net (Mei Novak) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

Top-posters will be placed in my ~/.killfile without notice.

-- 
Joachim Watanabe -- Universidad Nacional Autónoma de México (DGSCA)
"Do not worship the copy."