From atakahashi@tum.de Thu Jan 25 08:37:32 1996
Path: ashpoly!cascade!transat!ukc!fennimore!tum!atakahashi
From: atakahashi@tum.de (Anton Takahashi)
Newsgroups: comp.dsp
Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan25.083732.4088@tum.de>
Date: Thu, 25 Jan 1996 08:37:32 GMT
Organization: Technische Universität München
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How the 14 ASCII characters per node are encoded into the record groove.

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

When all 14 rows are assembled, the matrix forms an 80-column ASCII status report.

-- 
=== Anton Takahashi ===
Dept of Electrical Engineering, Technische Universität München
"5 sigma is a discovery. 7 is a question."

From tnakamura@cmu.edu Fri Jan 26 08:48:32 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!tnakamura
From: tnakamura@cmu.edu (Tomas Nakamura)
Newsgroups: comp.dsp
Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Jan26.084832.4936@cmu.edu>
Date: Fri, 26 Jan 1996 08:48:32 GMT
References: <1996Jan25.083732.4088@tum.de>
Organization: Carnegie Mellon University School of CS
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In article <1996Jan25.083732.4088@tum.de>, atakahashi@tum.de (Anton Takahashi) 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.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Tomas Nakamura <tnakamura@cmu.edu>
"In theory there is no difference between theory and practice."
Decstation 5000/200 / NEXTSTEP 3.3