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Performance Verification
4–20
AM700 Audio Measurement Set Service Manual
8. Set the generator output to Floating.
NOTE. There is a difference in the floating impedance between the CRT version
instrument and the flat panel display instrument.
9. Flat panel display version: Check that pin 1 of the XLR output is approxi-
mately 825 W to ground.
10. CRT display version:
a. Turn the power off.
b. Check that pin 1 of the XLR output is approximately 1 kW to ground.
11. Disconnect the test equipment from the AM700.
12. Turn the power back on.
Check Audio Analyzer Operation
These checks verify the operation of the Audio Analyzer attenuator and gain
stages using 120 Hz (the reference frequency) plus a low, a medium, and a high
frequency. This is done in both the High Res mode and the High BW mode.
1. If not already in Audio Analyzer mode, push the Analyzer button in the
Applications grouping of buttons (see Figure 4–12).
Figure 4–12: Applications buttons
2. Press the Configure button, and then touch the Input Selection soft key in the
screen display.
3. Set the generator to analyzer connection to internal (Gen A and Gen B) and
select the High Res A/D Converter as shown in Figure 4–13.
Check High Res Mode