Filter
Top Products
Performance Verification
AM700 Audio Measurement Set Service Manual
4–31
1. Press the Menu button.
a. Touch the Analog HRes Inputs soft key (if the FFT Analyzer is not
presently in High Resolution mode).
2. Press the Configure button.
a. Touch the Input Selection soft key.
b. Touch the source “toggle” icon soft key to select Gen A and Gen B.
c. Press the Clear Menu button.
3. Press and hold the Average button.
a. Touch the Processing soft key.
b. Select Hold Maximum and press the Processing soft key to enter your
selection.
c. Press the Average button to activate Hold Maximum (Averaging).
d. Press the Rescale button.
4. Touch the View 2 icon soft key to display the second view.
a. Touch the view 2 screen area to change active window to view 2.
5. Press and hold the Average button.
a. Touch the Processing soft key.
b. Select Hold Maximum and touch the Processing soft key.
c. Press the Average button to turn on averaging in view 2.
d. Press the Clear Menu button.
e. Press the Rescale button.
6. Check the generator output amplitude to ensure that it is still at +7.1 dBu
from the previous procedure. Set the generator output amplitude for
+7.1 dBu if it is not.
7. Check to see that the average noise floor is –90 dBu or lower. The noise
floor is limited by the generator.
8. Check that there are no harmonics or noise spurs greater than –80 dBu.
9. Turn the generator off and press the Average button to clear the Hold
Maximum trace. Then, press the Average button again to start a new Hold
Maximum trace.
10. Observe that the Hold Maximum noise floor is below –120 dBu.
Check Analog Acquisition
Noise Floor