4100-C:
A separate clock driver card is required to drive 1 or more amplifier cards. This unit indicates the "on" condition of the ±15 volts DC supply voltage with individual red LED lights and has a x3 amplitude drive adjustment pot for supplying a 15kHz excitation signal. This control is used to match a required calibration sensitivity to a specific model displacement probe. (1 clock, 0.80" wide normally fits in a far right rack slot).
