A Flexible Wide-Band Analogue Network for Direct Signal Display on Operator Consoles

Observation of analogue signals coming directly from the processes remains an indispensable tool in Particle Accelerator operation. The system presently used in the new CPS control system, allows analogue signals to be selectively routed at the operator consoles: (i) 32 out of 1600 signals to oscilloscopes, (ii) 10 out of 40 triggers for these oscilloscopes and (iii) 8 out of 80 video signals for TV monitors. These signals can also be observed on local oscilloscopes. An optimised multiplexing structure is used, the transmission range is several hundred meters and the bandwidth is from DC to 25 MHz. The switch network is controlled by a computer program which directs signals requested to the console oscilloscopes and, where required by the optimised nature of the network, reroutes previously chosen signals without disturbing the observer. A central interactive database is used and signals are chosen through a tree-structure from touch panels on the operator consoles.