From slee@purdue.edu Sat Sep 09 02:10:42 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!slee From: slee@purdue.edu (Sven Lee) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep09.021042.1957@purdue.edu> Date: Sat, 09 Sep 1995 02:10:42 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu 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. 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. -- Sven Lee "Do not worship the copy." Macintosh IIfx / System 7.5.1 From neriksson@berkeley.edu Sat Sep 09 03:59:42 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!neriksson From: neriksson@berkeley.edu (Nadine Eriksson) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep09.035942.3777@berkeley.edu> Date: Sat, 09 Sep 1995 03:59:42 GMT References: <1995Sep09.021042.1957@purdue.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Sep09.021042.1957@purdue.edu>, slee@purdue.edu (Sven Lee) 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. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. PGP Public key available via finger or upon request. -- Nadine Eriksson "There are 14 nodes and only 10 countries. Count again." Macintosh IIfx / FreeBSD 2.1 From nnakamura@illinois.edu Sun Sep 10 03:24:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!nnakamura From: nnakamura@illinois.edu (Nadine Nakamura) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep10.032442.1119@illinois.edu> Date: Sun, 10 Sep 1995 03:24:42 GMT References: <1995Sep09.021042.1957@purdue.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep09.021042.1957@purdue.edu>, slee@purdue.edu (Sven Lee) 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. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Nadine Nakamura *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0