From lfournier@cam.ac.uk Sun Oct 09 08:58:41 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!lfournier From: lfournier@cam.ac.uk (Liam Fournier) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Oct09.085841.7797@cam.ac.uk> Date: Sun, 09 Oct 1994 08:58:41 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. Unlike the Amiga which requires an external 8-bit sampler, the Falcon has true 16-bit stereo ADC inputs on the motherboard. Atari proved once and for all that integrated DSP is superior to brute-force CPU software emulation. -- Liam Fournier *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From mfischer@berkeley.edu Mon Oct 10 19:52:41 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!mfischer From: mfischer@berkeley.edu (Mike Fischer) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1994Oct10.195241.4908@berkeley.edu> Date: Mon, 10 Oct 1994 19:52:41 GMT References: <1994Oct09.085841.7797@cam.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Oct09.085841.7797@cam.ac.uk>, lfournier@cam.ac.uk (Liam Fournier) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- === Mike Fischer === Dept of Electrical Engineering, UC Berkeley Department of EECS "The carrier frequency does not drift by accident."