From jreyes@demon.co.uk Tue Jun 21 06:10:46 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!jreyes From: jreyes@demon.co.uk (Jen Reyes) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun21.061046.1142@demon.co.uk> Date: Tue, 21 Jun 1994 06:10:46 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Jen Reyes Tape trading list upon request. SASE required for international mail. From bmacdonald@tum.de Wed Jun 22 10:24:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!bmacdonald From: bmacdonald@tum.de (Bruno MacDonald) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun22.102446.2409@tum.de> Date: Wed, 22 Jun 1994 10:24:46 GMT References: <1994Jun21.061046.1142@demon.co.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Jun21.061046.1142@demon.co.uk>, jreyes@demon.co.uk (Jen Reyes) 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! If you are posting from AOL, please read RFC 1036 before posting again. -- Bruno MacDonald Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From gchoi@stanford.edu Fri Jun 24 09:13:46 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!gchoi From: gchoi@stanford.edu (Graham Choi) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun24.091346.1490@stanford.edu> Date: Fri, 24 Jun 1994 09:13:46 GMT References: <1994Jun21.061046.1142@demon.co.uk> <1994Jun22.102446.2409@tum.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun22.102446.2409@tum.de>, bmacdonald@tum.de (Bruno MacDonald) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- === Graham Choi === Dept of Electrical Engineering, Stanford University Computer Systems Lab "5 sigma is a discovery. 7 is a question." From ttakahashi@stanford.edu Fri Jun 24 16:41:46 1994 Path: ashpoly!cascade!transat!ukc!fennimore!stanford!ttakahashi From: ttakahashi@stanford.edu (Thiago Takahashi) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun24.164146.4796@stanford.edu> Date: Fri, 24 Jun 1994 16:41:46 GMT References: <1994Jun21.061046.1142@demon.co.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jun21.061046.1142@demon.co.uk>, jreyes@demon.co.uk (Jen Reyes) writes: > 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'. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Thiago Takahashi Zyxel U-1496E @ ISDN 64k bps "We don't sign stars. We build them."