Sandel ST3400, Installation Manual

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7.2.7 Brightness/Audio Page
The Brightness/Audio page (See Figure 7-1) shows along with other information
the number of hours and cycles since the last lamp replacement.
It also allows the installer to specify the nominal and maximum audio levels for
the low level audio output and trim the output level of the speaker audio output
with respect to the low level output. The low level output acts as master gain..
The Reset Request allows the operator to reset the lamp hours and cycles when
the lamp has been replaced. Resetting the lamp hours/cycles is initiated by
selecting the “Reset” request and pressing the RESET soft key when in the Edit
Mode. The Confirm Notice will be displayed. Press the RESET soft key again to
confirm the action to reset the lamp hours and lamp cycles to zero or the
CANCEL soft key to cancel the action with no changes made. If while waiting
for confirmation the operator moves the Cursor, or exits the Brightness/Audio
page, the action will be cancelled.
7.2.8 Alerts Test
Initiate an audio level test by selecting the desired volume level and pressing the TEST
soft key (see Figure 7-1). This may be used to show the result of changing the audio
level adjustments. The ‘Nominal’ and ‘Maximum levels are the master audio levels,
which vary from Nominal to Maximum with airspeed. This adjustment should be made
to adjust the headphone volume first (coming from pin P1-30). If the cockpit speaker
output (P1-15) is used, adjust SPKR VOL to set the corresponding speaker volume. If
the cockpit speaker is driven instead from the cockpit audio system, SPKR VOL is not
used. During an alerts test, the external annunciators, if connected, will illuminate.
Figure 7-1: Brightness/Audio
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ST3400 INSTALLATION MANUAL 82002-IM-L