From vgirard@netcom.com Thu Oct 24 02:39:21 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!vgirard
From: vgirard@netcom.com (Valeria Girard)
Newsgroups: comp.dsp
Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Oct24.023921.7781@netcom.com>
Date: Thu, 24 Oct 1996 02:39:21 GMT
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: WinVN 0.99.5
Lines: 11

How the 14 ASCII characters per node are encoded into the record groove.

The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.
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.

-- 
Valeria Girard | vgirard@netcom.com
PGP Key fingerprint: 36BC 646F F20F 52E9
"Keep the channels open."

From smoreau@inria.fr Fri Oct 25 16:34:21 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!smoreau
From: smoreau@inria.fr (Seo-yeon Moreau)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Oct25.163421.4385@inria.fr>
Date: Fri, 25 Oct 1996 16:34:21 GMT
References: <1996Oct24.023921.7781@netcom.com>
Organization: INRIA Rocquencourt
NNTP-Posting-Host: inria.fr
X-Newsreader: TIN [version 1.2 PL2]
Lines: 10

In article <1996Oct24.023921.7781@netcom.com>, vgirard@netcom.com (Valeria Girard) writes:
> How the 14 ASCII characters per node are encoded into the record groove.
> The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

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

-- 
=== Seo-yeon Moreau ===
Dept of Electrical Engineering, INRIA Rocquencourt
"Marcus is not one man."

From vfournier@illinois.edu Sat Oct 26 02:54:21 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!vfournier
From: vfournier@illinois.edu (Valeria Fournier)
Newsgroups: comp.dsp
Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Oct26.025421.2043@illinois.edu>
Date: Sat, 26 Oct 1996 02:54:21 GMT
References: <1996Oct24.023921.7781@netcom.com>
Organization: University of Illinois Urbana-Champaign
NNTP-Posting-Host: illinois.edu
X-Newsreader: WinVN 0.99.5
Lines: 11

In article <1996Oct24.023921.7781@netcom.com>, vgirard@netcom.com (Valeria Girard) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single!

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Valeria Fournier | vfournier@illinois.edu
PGP Key fingerprint: 3464 8BF5 0F3C C943
"Keep the channels open."