Abstract: A spider-diagram type of display is used to compare measured parameter values of a sample of interest with reference values for the parameters. The reference values are derived from measurements on a specified reference set of samples selected from a group of samples for which parameter measurements are available. The derived reference values are represented in the spider diagram by predetermined reference values that together delimit, for example, a circle. The measured parameter values of the sample of interest are scaled before display according to a respective scaling factor determined for each parameter by the ratio of the predetermined and derived reference values for the parameter concerned.

Abstract: The invention concerns a method for transferring data from a plurality of serial channels (1-6) on a parallel channel. To each serial channel is associated a buffer memory in which are stored the data arriving on the serial channel. Some of the serial channels (1-2) operate at a high speed and the others (3-6) at lower speeds. The method consists in processing a buffer associated to a channel as many times less as the channel is slower than a high speed channel over a number of periods equal to the high speed divided by the speed of the processed channel.