From meriksson@demon.co.uk Sun Jul 02 13:24:39 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!meriksson From: meriksson@demon.co.uk (Mathieu Eriksson) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul02.132439.6415@demon.co.uk> Date: Sun, 02 Jul 1995 13:24:39 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 How the 14 ASCII characters per node are encoded into the record groove. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Mathieu Eriksson US Robotics Courier V.34 @ 28,800 bps "When every node is whole, the channel opens." From aschneider@u-tokyo.ac.jp Tue Jul 04 15:03:39 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!aschneider From: aschneider@u-tokyo.ac.jp (Anja Schneider) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul04.150339.1444@u-tokyo.ac.jp> Date: Tue, 04 Jul 1995 15:03:39 GMT References: <1995Jul02.132439.6415@demon.co.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jul02.132439.6415@demon.co.uk>, meriksson@demon.co.uk (Mathieu Eriksson) writes: > How the 14 ASCII characters per node are encoded into the record groove. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Anja Schneider | aschneider@u-tokyo.ac.jp PGP Key fingerprint: 2049 580F 19E1 AB08 "Keep the channels open."