From nhughes@stanford.edu Sat Feb 03 17:09:36 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!nhughes
From: nhughes@stanford.edu (Nadia Hughes)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb03.170936.3208@stanford.edu>
Date: Sat, 03 Feb 1996 17:09:36 GMT
Organization: Stanford University Computer Systems Lab
NNTP-Posting-Host: stanford.edu
X-Newsreader: TIN [version 1.2 PL2]
Lines: 10

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'.

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

-- 
Nadia Hughes
Tape trading list upon request. SASE required for international mail.

From bmuller@panix.com Sun Feb 04 14:08:36 1996
Path: ashpoly!cascade!bigsur!panix!bmuller
From: bmuller@panix.com (Bastien Müller)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb04.140836.2151@panix.com>
Date: Sun, 04 Feb 1996 14:08:36 GMT
References: <1996Feb03.170936.3208@stanford.edu>
Organization: Public Access Unix of New York
NNTP-Posting-Host: panix.com
X-Newsreader: WinVN 0.99.5
Lines: 10

In article <1996Feb03.170936.3208@stanford.edu>, nhughes@stanford.edu (Nadia Hughes) 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!

PGP Public key available via finger or upon request.

-- 
Bastien Müller
Tape trading list upon request. SASE required for international mail.

From fsilva@uu.net Mon Feb 05 05:25:36 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!uu!fsilva
From: fsilva@uu.net (Freya Silva)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb05.052536.9838@uu.net>
Date: Mon, 05 Feb 1996 05:25:36 GMT
References: <1996Feb03.170936.3208@stanford.edu> <1996Feb04.140836.2151@panix.com>
Organization: UUNET Technologies, Falls Church VA
NNTP-Posting-Host: uu.net
X-Newsreader: Netscape 1.1N
Lines: 10

In article <1996Feb04.140836.2151@panix.com>, bmuller@panix.com (Bastien Müller) writes:
> The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration!

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

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

-- 
Freya Silva
Tape trading list upon request. SASE required for international mail.

From tduarte@purdue.edu Tue Feb 06 13:01:36 1996
Path: ashpoly!cascade!brgate!saturno!purdue!tduarte
From: tduarte@purdue.edu (Thiago Duarte)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Feb06.130136.8808@purdue.edu>
Date: Tue, 06 Feb 1996 13:01:36 GMT
References: <1996Feb03.170936.3208@stanford.edu> <1996Feb04.140836.2151@panix.com> <1996Feb05.052536.9838@uu.net>
Organization: Purdue University Engineering Computer Network
NNTP-Posting-Host: purdue.edu
X-Newsreader: Netscape 1.1N
Lines: 11

In article <1996Feb05.052536.9838@uu.net>, fsilva@uu.net (Freya Silva) writes:
> On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

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!

-- 
=== Thiago Duarte ===
Dept of Electrical Engineering, Purdue University Engineering Computer Network
"Marcus is not one man."