GAI-Tronics 701-902 SmartSeries Посібник користувача - Сторінка 9

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701-902 S

MART

ERIES

Adjustments

The User Adjustment Control is located beneath the GAI-Tronics nameplate on the front panel. Refer to

Figure 1. It is used to make all user adjustments normally required for installation. Loosen the two

screws on the GAI-Tronics nameplate and rotate it counterclockwise to access the adjustment hole. Make

adjustments by inserting a 1/8-inch flat blade screwdriver through the access hole and into the

potentiometer located directly behind the hole.

The User Adjustment Control potentiometer can be used to make three separate adjustments:



Minimum speaker amplifier output level setting



Offset amplifier level (difference between the ambient noise and the amplifier output levels)



VLC (volume level control) adjustment (sets a preset speaker level to override the normal volume

control setting).

Minimum Level Adjustment

To set the minimum amplifier output level, insert the 1/8-inch flat blade screwdriver into the User

Adjustment Control and set it fully counterclockwise. Listen for a single beep from the speaker

indicating the speaker amplifier is in the Minimum Level Adjustment mode. A continuous tone should be

heard after the beep tone. (See note below).

This test tone is used as a reference to adjust the speaker amplifier output level to the desired volume.

Turn the adjustment pot clockwise for the desired output. The test tone automatically shuts off 5 seconds

after the last adjustment. The factory default setting for minimum level is 4.0 watts nominal.

: If the page line is in use immediately after the beep tone, the page signal should be used to make

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the minimum level adjustment. If the page line is inactive following the beep tone, a continuous tone is

activated to make the minimum level adjustment. After the tone is activated, all page line activity is

ignored until completion of the adjustment.

Offset Level Adjustment

The Offset Level allows the output of the SmartVolume™ speaker amplifier to maintain a set difference

or "offset" between the ambient noise level and the speaker output level. Turn the User Adjustment

Control fully clockwise and listen for the two beep tones indicating that the station is in the Offset

Adjustment mode. A continuous tone should be heard from the station speaker. Turn the adjustment pot

counterclockwise to the desired output level.

: If the page line is in use immediately after the two beep tones are heard, the page signal should be

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used to make the offset level adjustment. If the page line is inactive immediately following the beep

tones, a continuous tone is activated to make the minimum level adjustment. After the tone is activated,

all page line activity is ignored until completion of the adjustment.

VLC Level Adjustment

When activated, the VLC overrides the normal volume control setting allowing the amplifier level to

change to a preset level during an emergency page. The factory default setting for the VLC Level is 10%

of maximum power (nominally 1.2 watts).

: The system must be equipped with a SmartSeries

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VLC function.

f:\standard ioms - current release\42004 instr. manuals\42004-658l2g.doc

03/12

ANDSET

PEAKER

MPLIFIER

MCU (Master Control Unit) to activate the

Pub. 42004-658L2G

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