Circuit for checking switching matrix

摘要

The circuit comprises external connections (AH,AL) to the switching matrix junctions, each with a series connection to a resistance. The other connections of the resistances are connected together. The resistances have different resistance values and the sums of the pairs of corresponding resistances (RH,RL) are of different values. There is a diode connected between each resistance and its corresponding resistance. Each external connection can have an associated resistance, inductance or capacitance with pref. different parameters. The H and L bus lines of the switching matrix are subjected to a current or voltage and the resulting parameters measured and compared with values for correctly functioning circuits.