SM0486
vibration pickup and signal generator outputs. The outer knob is used for coarse
adjustments, and the inner knob is used for fine adjustments. Both adjustments are
used to center the null meter pointer. Additional controls and accessories located
on the meter panel are as follows:
Pickup input phone jack--feeds the pickup input to the meter panel.
AC output phone
jack--to
facilitate
signal
generator
or
pickup
output
monitoring.
Pickup/signal generator selector switch--allows selection
of
output
of
either the signal generator or the vibration pickup.
Null indicator meter--used to determine when the pickup output and signal
generator output are balanced. The meter is most sensitive in the center
position.
Sensitivity control--adjusts signal generator output across null indicator
meter.
Figure 6.
Pickup Calibrator Front Panel
119
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