This chapter discusses the GMRT receiver system chain. This chain starts from the Multi-frequency RF Front-Ends and ends at the Baseband system. The major blocks in this chain along with their various possible configurations are described.
A detailed analysis of the noise contributed by the various components of this chain is presented. The length of the fiber optic cables linking the antennas to the CEB varies from about 600m for the nearest antennas to about 21km for the most distant ones. Since the transmission loss increases with increasing fiber length, different antenna systems will have different signal to noise ratios at the CEB. However by optimally adjusting the operating power levels at different points of the receiver chain one can ensure that the maximum degradation of the system noise temperature is less than 1% for all antennas.