computer on light on keithley 120ma keithley 220ma keithley 120ma keithley 20ma keithley 10ma keithley off octave:32> t=1:240000; y=filter(ones(1,4000)/4000,1,dac(t)-calib*adc(t)); octave:33> t=190000:210000; plot(t,y(t));