At the GMRT, the dual polarized RF signals from each antenna are processed through super heterodyne receivers and finally brought to a central location for further processing. The intermediate frequency signals from each antenna are then down-converted to baseband signals and fed to the digital signal processing backend. A baseband system is used for converting the IF signal to baseband signal to get a 32 MHz bandwidth from each polarization


Converts IF signal to Baseband signal
Front panel Indicator for power Level

Input IF Signal Centre Frequency CH1 : 130MHz & CH2 : 175MHz
IF Signal Bandwidth (Max) 32 MHz
Input IF Power ( in each channel ) -20.0 dBm
Baseband Frequency Range 32 MHz
Baseband signal power level 0dBm
Baseband System Gain 30dB
BB LO Characteristics
Tunable Frequency Range 50-90Mhz, 100Hz Step
Frequency Tuning Controls TTL , BCD Format
Spurious Signal Levels < -60 dBc Non-harmonic
Phase Noise -80 dBc/Hz at 100 Hz
Switching Speedl < 100 mS