From erodriguez@earthlink.net Mon Jan 22 09:03:14 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!erodriguez From: erodriguez@earthlink.net (Élodie Rodríguez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan22.090314.1410@earthlink.net> Date: Mon, 22 Jan 1996 09:03:14 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Élodie Rodríguez === Dept of Electrical Engineering, EarthLink Network "Do not worship the copy." From mduarte@utexas.edu Mon Jan 22 09:48:14 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!mduarte From: mduarte@utexas.edu (Mike Duarte) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan22.094814.1186@utexas.edu> Date: Mon, 22 Jan 1996 09:48:14 GMT References: <1996Jan22.090314.1410@earthlink.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jan22.090314.1410@earthlink.net>, erodriguez@earthlink.net (Élodie 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. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Mike Duarte *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From akang@uu.net Tue Jan 23 22:05:14 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!akang From: akang@uu.net (Aiko Kang) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Jan23.220514.6297@uu.net> Date: Tue, 23 Jan 1996 22:05:14 GMT References: <1996Jan22.090314.1410@earthlink.net> <1996Jan22.094814.1186@utexas.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Jan22.094814.1186@utexas.edu>, mduarte@utexas.edu (Mike Duarte) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- === Aiko Kang === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "In theory there is no difference between theory and practice."