SP80 interface – IU80 – Output characteristics

The SP80 and SP80H analogue scanning probes have two electronic interface options, the IU80 and, when the probe is used with the UCC2 controller, the SP80 daughtercard. This document details the output characteristics of the IU80 interface.


The maximum output from the IU80 interface is 10,000,000 counts per second and the minimum edge separation is 90ns.

There is a buffer inside the IU80 that ensures this output speed is not exceeded; this would not happen during normal metrology measurements but, when changing styli, fast shock movements can occur, the buffer ensures that counts are not lost.