COMPONENT MAINTENANCE MANUAL
AVIATION RECORDERS
FA2100CVR
Rev. 15 Page 128
Apr. 14/16
Testing & Fault Isolation
23–70–04
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to the restrictions on the cover page of this document.
Figure 125. Audio Reference Level Utility, Play Sound
(f)
Adjust the Audio Reference Level menu volume slider so that the meter
reads 3 Volts RMS or as close as possible to this voltage (without going
over 3 Volts RMS).
(g)
From the Audio Reference Level Menu select Sound => Stop Play to
stop audio output to the sound card.
(h)
Set the toggle switches on the loop
−
back connector to the following set-
tings: (Switch Settings: Channel 4 and No Audio Out).
(i)
At the Audio Reference Level menu, ensure that the Channel 4 check box
is selected and Channel 1 is deselected. Select Sound => Play Sound to
output the 1000 Hz wave file to the sound card.
Figure 126. Audio Reference Level Utility, Play Sound
(j)
Adjust the Audio Reference Level menu volume slider so that the meter
reads 2 Volts RMS or as close as possible to this voltage (without going
over 2 Volts RMS).
(k)
From the Audio Reference Level menu select Sound => Stop Play to
stop audio output to the sound card.
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