9
Operation
The POWER LED illuminates whenever AC power is applied to the
amplifier (there is no power switch on the amplifier).
The PEAK LEVEL LED illuminates whenever the speaker output signal
level approaches its maximum level. This indicator is used when setting
volume levels. Maximum output level is achieved when the PEAK LEVEL
indicator flashes intermittently on loud peaks of the input signal. If the
indicator illuminates steadily, the output signal volume is set too high and
distortion is occurring. Decrease the volume control for the appropriate
input until the indicator flashes only occasionally.
This control adjusts the amount of Audio Enhancement effect mixed in to
the page signal. To use this function, the AUDIO ENHANCEMENT switch
beneath the input connection cover must be set to ON. Setting this
switch to OFF bypasses the Audio Enhancement effect and makes the
control inoperable. With the AUDIO ENHANCEMENT switch turned ON,
make a page and rotate the control until the audio sounds crisp and
clear.
TREBLE and BASS controls are provided to adjust the high frequency
and low frequency response of the paging system. Reference positions
are provided for these controls. When set to these positions, the
frequency response of the system will be flat. Set the controls to the
customerʼs satisfaction. Clockwise rotation increases (boosts) the
response and counterclockwise reduces (cuts) the response. Increasing
bass and/or treble can cause output signal peaks to increase. Check the
PEAK LEVEL indicator after making adjustments and lower the music
input volume if excess peaking occurs.
The VOX SENS control should be set so that only the desired signal is
above the threshold level, while noise or unwanted signal is below it.
When a TEL input signal is detected, the music channel will be muted.
To set this feature: Rotate the control fully clockwise. Next, while making
a page announcement and talking at a low level, rotate the control
counterclockwise to the point where the sound is not choppy or missing
parts of words (but not to the maximum counterclockwise position).
Setting the control to full counterclockwise will defeat the auto music
mute.
If the background music shuts down when no page is in progress, then
line noise is triggering music mute. Rotate the control clockwise until the
music is restored.
Indicator LEDs
Control Knobs
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