HOW TO OPERATE THE MICROPHONE DURING NON-ALARM CONDITIONS
(SEE FIGURE 20)
During non-alarm conditions, operate the microphone in
the following manner.
1. To
talk
to ALL areas:
Turn ON (UP) ALL SPEAKERS TALK Switch
(Item A) and go to Step 2.
To talk to SPECIFIC areas:
Turn desired Speaker Select Switches DOWN
to activate (Item B).
2. Remove the Microphone from the cradle; press
the Talk switch (Item C). Wait for the green
TALK LED to turn ON (Item D).
3. Make the appropriate announcement.
4. When finished, unkey the Microphone and
place it in the cradle.
5. Turn OFF (DOWN) ALL SPEAKERS TALK
Switch and/or activated Speaker Select
Switches to CENTER position (Items A and B).
Figure 20
LED/Switch Locations for Microphone Operation
During Non-Alarm Conditions (Dual Channel)
TRIPLE CHANNEL AUDIO OPERATIONS
The following paragraphs discuss NDU Triple Channel Audio Operations.
AUDIO CONTROL LED/SWITCH MODULE FOR TRIPLE CHANNEL AUDIO
The Audio Control Module contains eight switches and LEDs. The LED next to each switch illuminates lo indicate
that an operation controlled by that switch has been selected. Figure 21 shows a Triple channel Audio Control LED/
Switch Module controlling the following functions:
. ALL SPEAKERS EVAC
. SELECTIVE EVAC
. ALL SPEAKERS TALK
l
LOCAL SPEAKER ALERT
. LOCAL SPEAKER EVAC.
The function of each switch is explained in the following paragraphs.
TRIPLE CHANNEL
ALL SPEAKERS EVAC
SELECTIVE EVAC
ALL SPEAKERS TALK
(BLANK)
(BLANK)
(BLANK)
LOCAL SPEAKER ALERT
LOCAL SPEAKER EVAC
AUDIO CONTROL
SWITCH MODULE
TRIPLE CHANNEL
Figure 21
Audio Control LED/Switch Module for Triple Channel Operations
44
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