3-2.2.1 Configure the shaker power
amplifier for the specified test conditions, i.e., the shaker system shall be
adjusted for the calculated power and peak voltage requirements for the random
spectrum which will be used (see Chapter 1, Theory of Operation
). Set all variables such as plate voltage,
field current, amplifier gain, output transformer tap, etc., to these
calculated conditions which will be used for the 1.0g (peak) sine run, as well
as for the subsequent taped random test.
the output from the control charge amplifier in parallel to the tape deck and
the sine-servo controller inputs. Then connect the input to the left channel
of the tape deck in parallel with the input to the power amplifier from the
servo controller output thru the pre-amplifier or gain controls which are
normally used. (see Figure
3-2 for sample block diagram).
3-2.2.3 Configure the sinusoidal vibration system in the manner normally
used for conducting a 1.0a (peak) sine sweep from 2000 to 20 Hz at a
logarithmic sweep rate of one octave per minute.
the details of all electrical parameters so that they can be reproduced
exactly in subsequent test set-ups. This documentation shall include a block
diagram schematic of the test set-up plus a data sheet listing: all equipment
used, control settings of the equipment and significant voltage and current
has been included as a sample
electrical specification sheet for an actual test conducted.