real-time analyser (part 3) - pink noise generator, front panel, and final remarks

real-time analyser (part 31 elektor may 1984 Our real-time analyser still lacks one important printed circuit board, namely that for the pink noise generator. This generator is indispensable for making measurements with the real-time analyser. Using pink noise we can actually show a complete frequency characteristic from 25 Hz to 20 kHz at the same time on the analyser"s display. This article will also deal with some practical tips about construction and calibration. And, of course, the finishing touch for the instrument is the front panel, which is now available. (part 3) real-time analyser pink noise generator, front panel, and final remarks As of last month the real-time analyser is operative but it is far from complete. Any signal that is presented to the input is analysed and then output to the display (LED or video). For actual measurement purposes, however, a signal is needed that contains all the frequencies in the audio band that is to be measured. In this way a direct re...