New Control and Monitor system for GMRT

The development of the new Control and Monitor system (CMS) for GMRT envisages improved architectural functionalities compared to the present online system and is being developed using state-of-the-art approaches with available off-the-shelf hardware components and software solutions. We present the details of the upgrade undertaken to build a more powerful and sophisticated system. We also present the design and performance details of sub systems like Monitor and Control Module (MCM) and its associated software. The CMS system controls and monitors the working of all the telescope subsystems like Analog receiver, Digital receiver back ends, Optical Fibre systems, Electromechanical systems like Servo and Feed position system and Sentinel systems etc. This system establishes the command and voice communication link over a high speed 1 Gbits/s digital optical fibre link between the Central building and the antennas over a distance of about 20 Kms. A new MCM card is being developed using a Rabbit 8 bit micro-processor with ADC support and 100 Mbits/s Ethernet communication link. The RFI performance of this card is also being presented. VOIP phone and Video camera facility will also be available in all the antennas for voice communication and security purposes.