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iv. Apply power to the generator, preamplifier, then the level meter.
v. Adjust the generator output level so that the preamplifier output level is
at the desired red threshold. If the proper level can't be reached, adjust
the preamplifier gain control.
vi. Locate VR1 on the channel 1 audio circuit board. (See Figure 7 for serial
#81037 and above or Figure 8 for serial #81036 and below) Adjust VR1
until the peak LED is between green and red. The color should appear
amber when the setting is correct.
vii. Repeat this procedure for channels 2 through 8.
viii. If it is desired to calibrate the peak indicator to a specific tape/disk
recorder input level, simply connect the output of the preamplifer to the
tape/disk recorder. Adjust the signal generator so that the desired peak
level is indicated on the recorder and then adjust VR1 until the peak LED
is between green and red.
1
2
3
SHIE LD
HOT
XLR MALE
Figure 6. Unbalanced input cable
