From kvasiliev@titech.ac.jp Mon Apr 11 20:14:22 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!kvasiliev From: kvasiliev@titech.ac.jp (Kirsty Vasiliev) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr11.201422.5764@titech.ac.jp> Date: Mon, 11 Apr 1994 20:14:22 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 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'. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- === Kirsty Vasiliev === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "The carrier frequency does not drift by accident." From jkang@purdue.edu Wed Apr 13 04:33:22 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!jkang From: jkang@purdue.edu (Jen Kang) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr13.043322.9806@purdue.edu> Date: Wed, 13 Apr 1994 04:33:22 GMT References: <1994Apr11.201422.5764@titech.ac.jp> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr11.201422.5764@titech.ac.jp>, kvasiliev@titech.ac.jp (Kirsty Vasiliev) 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). A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Jen Kang Tape trading list upon request. SASE required for international mail. From asantos@cam.ac.uk Thu Apr 14 01:29:22 1994 Path: ashpoly!cascade!mxgate!coyoacan!cam!asantos From: asantos@cam.ac.uk (Anton Santos) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Apr14.012922.5665@cam.ac.uk> Date: Thu, 14 Apr 1994 01:29:22 GMT References: <1994Apr11.201422.5764@titech.ac.jp> <1994Apr13.043322.9806@purdue.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr13.043322.9806@purdue.edu>, jkang@purdue.edu (Jen Kang) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Anton Santos "Marcus is not one man." Sun SparcStation 20 / FreeBSD 2.1