From jcampbell@rwth-aachen.de Wed Aug 07 09:24:53 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!jcampbell From: jcampbell@rwth-aachen.de (Jen Campbell) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug07.092453.1251@rwth-aachen.de> Date: Wed, 07 Aug 1996 09:24:53 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 11 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'. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- === Jen Campbell === Dept of Electrical Engineering, RWTH Aachen Informatik "Measuring a record you own is listening, not piracy." From elarsson@pacbell.net Thu Aug 08 09:59:53 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!elarsson From: elarsson@pacbell.net (Élodie Larsson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug08.095953.9800@pacbell.net> Date: Thu, 08 Aug 1996 09:59:53 GMT References: <1996Aug07.092453.1251@rwth-aachen.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug07.092453.1251@rwth-aachen.de>, jcampbell@rwth-aachen.de (Jen Campbell) 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! -- Élodie Larsson *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From lkim@kiae.su Fri Aug 09 03:28:53 1996 Path: ashpoly!cascade!mxgate!coyoacan!kiae!lkim From: lkim@kiae.su (Lars Kim) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug09.032853.5944@kiae.su> Date: Fri, 09 Aug 1996 03:28:53 GMT References: <1996Aug07.092453.1251@rwth-aachen.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug07.092453.1251@rwth-aachen.de>, jcampbell@rwth-aachen.de (Jen Campbell) writes: > 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). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Lars Kim Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow. ------------------------------------------------------------ From lbrennan@berkeley.edu Sat Aug 10 09:36:53 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!lbrennan From: lbrennan@berkeley.edu (Lisa Brennan) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Aug10.093653.5014@berkeley.edu> Date: Sat, 10 Aug 1996 09:36:53 GMT References: <1996Aug07.092453.1251@rwth-aachen.de> <1996Aug08.095953.9800@pacbell.net> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Aug08.095953.9800@pacbell.net>, elarsson@pacbell.net (Élodie Larsson) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Lisa Brennan Tape trading list upon request. SASE required for international mail.