Overview

The major components of the Monitor and Control system (see Figure 24.1) are ONLINE (a unix level program that provides the user interface), PCROUTER, a PC based router, COMH, a communications handler that deals with the packet based communication between the Unix workstation on which ONLINE is running and the Antenna Based Computer (ABC, also called ANTCOM) located in each antenna shell, and finally several Monitor and Control Modules, (MCM) which provide the monitoring and control interfaces to the various sub-units (i.e. the LOs, amplifiers, etc.).

Figure 24.1: Block diagram of the GMRT monitor and control System. See the text for more information.

We now look at each of these sub systems in slightly more detail.