Tests of the level-1 regional calorimeter trigger for the Compact Muon Solenoid experiment at the Large Hadron Collider

The Compact Muon Solenoid (CMS) calorimeter regional trigger system is designed to detect signatures of isolated and non-isolated electrons/photons, jets, /spl tau/-leptons, and missing and total transverse energy using deadtimeless pipelined architecture. This system comprises of 18 crates of custom-built electronics. The pre-production prototype backplane, boards, links and Application-Specific Integrated Circuits (ASICs) have been built and their performance is characterized.