RESP TEST SCHEME. MONITORING OF CODES/CODES

摘要

The coders/decoders are connected to optical numerical display units. At least two coders/decoders with the same operational behavior are connected before the data delivery units. Their inputs are connected to the data source. A switching system switches the coders/decoders alternately in their operative and non-operative states. Coders/decoders are followed by signalling devices which deliver an output signal when the coder/decoder output signals in consecutive connection phases do not coincide. The above signalling devices are connected to coders/decoders through switching means which deliver at their outputs an output potential only when a.c. signals are applied to their inputs. The signalling devices are optical display devices.