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Adjustment Procedures
AM700 Audio Measurement Set Service Manual
5–23
Analog Generator Board Adjustment
These adjustment steps set the DAC gain for the correct level of output signal for
Channel A and Channel B of the analog generator.
The following test equipment is needed:
H Precision digital multimeter or RMS meter
H XLR to banana connector adaptor cables
H Adjustment tool
1. Set up the precision digital multimeter.
a. Set the AC frequency band of the digital multimeter for 20 Hz for the
lowest expected frequency and 10 kHz for the highest expected
frequency.
b. Set the digital multimeter for ACV auto ranging.
c. Set the Terminals switch on the front panel to Front.
d. Using the XLR-to-banana interconnection cable, connect the banana
connector to the front terminals of the precision multimeter: HI-to-HI,
LOW-to-LOW, and GND-to-GUARD.
e. Set the Guard switch on the front panel to OPEN.
f. Connect the female XLR connector to Ch A OUT of the AM700 to the
input of the precision multimeter.
2. Set up AM700 Analog Generators
a. In the Generator Control Panel, press the Control button. This displays
the Generator Control menu screen.
b. Check that the Analog Generator is set for High Resolution mode. If not,
touch the High Resolution soft key to select it.
c. Set the CH A Waveform for Sine if it is not. Do this by touching the
Waveform soft key to display a pop-up list of available generator signals.
Use the large control knob to highlight Sine, then touch the pop-up list
or press Enter, in the keypad area, to select that choice.
NOTE. Both channels A and B must be set for sine. Channel B must not be set for
follow A.
Test Equipment Required
Set up Test Equipment
and the AM700