digitester with a difference - universal test aid for digital circuits

digitester with a difference elektor february 1984 The testing of digital circuits can be quite a headache. Our old faithful, the multimeter, is quite useless because of the operating frequencies: the logic levels change so rapidly _ thousands or millions of times per second — that even a digital multimeter is unable to cope. This problem can be solved in two ways: buy a higher quality test instrument or lower the operating frequency of the circuit under test. If you opt for the last, you will find our digitester just the thing! digitester witli a differente universal test aid for digita circuits Digital circuits normally operate at speeds which make it impossible for normal test instruments to be used for checking or fault finding. For instance, in an analogue multimeter, the inertia of the pointer prevents the reading of the level of a pulse train. The normal digitester does not help here either; it may well give an op- tical indication of the logic level at the pin of an IC, ...