The VIAVI RGS-2000NG TCAS Test Set is an RF signal generator/receiver for testing TCAS (Traffic Alert and Collision Avoidance System) with an option available for testing transponder LRUs. The RGS-2000NG was designed with modern software-driven digital modulation technology and is the RGS-2000 replacement for engineering development, design validation, manufacturing and return-to-service testing.