CMS HCAL LED System
CMS HCAL LED system should perform the following tasks:
- Load a DAC for intensity control
- Load revolution and bunch counters for timing control
- Control the on/off status bit for each of two LEDs
- Provide readback of the DAC, counters, and status bits
This system is a non-intelligent control interface for LED functions distributed
at about 150 HCAL locations. Loading and retrieving information is via a
radiation tolerant fieldbus network.