| % Here's an attempt to sketch the filter toplogy: | |
| % | |
| % in R1A C1 R2A C2 | |
| % >----+--/\/\/\----||---+--+--+--/\/\/\----||---+---+----> out | |
| % | | | | | | | |
| % +------/\/\/\-----+ | +------/\/\/\-----+ | | |
| % R1B | R2B | | |
| % +--|-\ | | |
| % | \__________________| | |
| % R_BIAS | / |
| # Description: AAFILTERNEW | |
| # File: AAFilterNew | |
| # Revision: 2011-10-25 | |
| r r6 5.11k nin na1 | |
| r r7 5.11k na1 nb1 | |
| c c12 2.2n nb1 gnd | |
| c c16 6.8n na1 nout1 | |
| op n4a lt1124 nb1 nout1 nout1 |
| function y = applysos(soscoef, x) | |
| % Apply a matrix of SOS cofficients to some time series. | |
| % | |
| % Tobin Fricke | |
| % 2012-02-07 | |
| if size(soscoef,2) ~= 6 | |
| error('soscoef is not the right size'); | |
| end |
| Analysis of the twin-T notch filter |
| How to calculate an exponential running average. |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <math.h> | |
| /* | |
| Custom atan2 function calling the FPU directly, for use when the | |
| math library isn't available. | |
| Tobin Fricke <tobin.fricke@ligo.org> 2012-03-13 | |
| # FILTERS FOR ONLINE SYSTEM | |
| # | |
| # Computer generated file: DO NOT EDIT | |
| # | |
| # MODULES FeCoeff32x | |
| # | |
| # SAMPLING RATE 65536 | |
| # | |
| ################################################################################ | |
| ### FeCoeff32x ### |
| Show the effect of ADC/DAC quantization noise. |
| % State-Space Simple Harmonic Oscillator | |
| % | |
| % This script simulates a damped simple harmonic oscillator (i.e. mass on a | |
| % spring) using a state-space description, and also implements a linear | |
| % observer. | |
| % | |
| % Tobin Fricke | |
| % 2012-04-13 | |
| % Parameters |
I re-installed recently on a new Ubuntu 9.10 system. It was actually totally painless and just took 15 minutes.
The first step is to make a directory for the EPICS software to live in. It's conventional to put it in "/opt/epics". So make this directory:
cd /opt
sudo mkdir epics