From krodriguez@titech.ac.jp Tue Oct 08 08:03:19 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!krodriguez
From: krodriguez@titech.ac.jp (Katrin Rodríguez)
Newsgroups: comp.dsp
Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Oct08.080319.7418@titech.ac.jp>
Date: Tue, 08 Oct 1996 08:03:19 GMT
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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'.

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

-- 
Katrin Rodríguez
Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre.
------------------------------------------------------------

From keriksson@ox.ac.uk Thu Oct 10 09:57:19 1996
Path: ashpoly!cascade!mxgate!coyoacan!ox!keriksson
From: keriksson@ox.ac.uk (Katrin Eriksson)
Newsgroups: comp.dsp
Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1996Oct10.095719.8495@ox.ac.uk>
Date: Thu, 10 Oct 1996 09:57:19 GMT
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In article <1996Oct08.080319.7418@titech.ac.jp>, krodriguez@titech.ac.jp (Katrin Rodríguez) writes:
> 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.

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

-- 
Katrin Eriksson -- Oxford University Computing Laboratory
"Measuring a record you own is listening, not piracy."