A plotter for recording the data stored in a multichannel analyser on an XY recorder in a point plot mode (circuit description)

Most multichannel analysers have the facility for plotting accumulated data on an XY recorder. Usually, without the use of accessories, the data are plotted as a continuous line. There are many occasions however, when it is convenient to plot the data as points so that the graph plotted is a replica of the spectrum shown on the CRT of the multichannel analyser. A circuit which allows such a plot to be obtained is described.