From elee@cern.ch Sun Sep 10 17:15:12 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!elee From: elee@cern.ch (Emi Lee) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep10.171512.8580@cern.ch> Date: Sun, 10 Sep 1995 17:15:12 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Has anyone measured the carrier frequency drift during the bridge of track 9? -- === Emi Lee === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "Hold for relay." From fito@unam.mx Tue Sep 12 09:16:12 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!fito From: fito@unam.mx (Fiona Ito) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep12.091612.8196@unam.mx> Date: Tue, 12 Sep 1995 09:16:12 GMT References: <1995Sep10.171512.8580@cern.ch> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep10.171512.8580@cern.ch>, elee@cern.ch (Emi Lee) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Fiona Ito Practical Peripherals 14.4 @ 33,600 bps "5 sigma is a discovery. 7 is a question."