Upgraded Frequency Standard for the GMRT Observatory

An Active Hydrogen Maser (AHM) unit was recently procured and installed at the Giant Metrewave Radio Telescope (GMRT) observatory. The ultra low phase noise and stability characteristics of this AHM will facilitate the observatory to carry out Very Long Baseline Interferometry (VLBI) observations. The outputs from the AHM will be used as precision frequency reference for the GMRT signal processing receiver chain particularly for synchronizing sampling clocks for the digitizers and as a reference to the computing cluster.