Cab Signal Master is a microprocessor based system specially developed to test all cab signal equipment in railroad locomotives and transit cars.  Programmable default settings and straight forward operations allow simple "plug it in, turn it on" operation with very little instruction.

The large easy-to-read display and weather-proof controls provide a rugged user interface. The portable tester accurately simulates both cab signal code rates and speed signals simultaneously and can measure loop current while coding.  The test system can be configured to automate tests.