From mmacdonald@hanse.de Thu Oct 10 04:34:39 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!mmacdonald From: mmacdonald@hanse.de (Marta MacDonald) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct10.043439.2650@hanse.de> Date: Thu, 10 Oct 1996 04:34:39 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de 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. -- Marta MacDonald *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From rhughes@mit.edu Fri Oct 11 21:01:39 1996 Path: ashpoly!cascade!transat!ukc!fennimore!mit!rhughes From: rhughes@mit.edu (Renata Hughes) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Oct11.210139.1693@mit.edu> Date: Fri, 11 Oct 1996 21:01:39 GMT References: <1996Oct10.043439.2650@hanse.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Oct10.043439.2650@hanse.de>, mmacdonald@hanse.de (Marta MacDonald) 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! -- Renata Hughes | rhughes@mit.edu PGP Key fingerprint: F549 1C89 6DBC C769 "Keep the channels open."