Operator's guide
The signal voltages output by the 3V are proportional to ground
velocity, and are transmiied f rom t he i nstrument o n b alanced
diferential lines. In addition, mass position signals are sent as single-
ended circuits referred to analogue ground on the output plug. The 3V
also receives control signals, which are used to clamp and unclamp the
masses, and to run the motors which level and centre the instrument
once in position. Finally, a line is provided for you to apply a calibrating
voltage to the force transducers, thereby measuring the defection
sensitivity.
December 2004
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