Introduction
Antenna
Data Acquisition
Correlator
C-Rack
D-Rack
Mark 5 Disk Recorder
Tape Recorders
Maser
Station Computer
Communications
VLBA Array Operators
Data Acquisition signal path:
C-Rack
C-Rack. This rack contains the GPS receiver that checks the timing from the maser against GPS satellites. It also contains modules that send out timing pulses to other equipment within the system.
Data Acquisition signal path:
C-Rack


Within the signal path, the C-Rack contains amplifiers that boost the signal before going into the D-Rack.

The more important function of the C-Rack, however, is to take the timing signal from the maser, reformat it, compare it against the GPS receiver, and send out timing pulses to the instrumentation.

Without accurate time, it would be impossible to sync up the recording media at the Correlator. Accurate time is also required so that the antenna knows when to point and for how long.