GAI-Tronics ACC2500 Audio Control Center - Manual (Page 30)

Installation ACC2500 Audio Control Center
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Main Diagnostics Selection
To enter the main programming mode:
1. Remove power from the desk set.
2. Reapply power and wait for the PB1 through PB4 LED S to illuminate. (The display will indicate
“checking parameters - please wait.”) Press either PB1, PB2, PB3, or PB4 to enter diagnostics.
3. The display will then indicate that the Main Diagnostics mode has been entered, and buttons PB1-PB4
can now be pressed. PB1 through PB4 are used to select different parameter changes from the default
settings.
PB1 – Line Output Adjust
An ac voltmeter or Sinadder meter should be connected across the line to achieve the proper level setting.
Ensure that the line is terminated with a 600-ohm load.
After entering the Main Diagnostic selection mode, press the PB1 button. The display will indicate the
current setting, which is set at the factory at -10 dBm. The range for this setting is variable from off to
+12 dBm. See the Line Output Adjustment table for approximate settings. The desk set buttons are used
as follows in the Line Output Adjust mode:
Button Line Output Level Adjustment Mode Function:
VOLUME Up Increases the output level, verifying the proper level with the meter connected
to the line.
CTL + VOLUME Up Increases the output level by 10.
VOLUME Down Decreases the output level, verifying the proper level with the meter connected
to the line.
CTL + VOLUME Down Decreases the output level by 10.
TRANSMIT Saves the current setting and exits back to the main selection mode.
DEACT Restores the previously programmed setting.
TIME Exits the line output adjustment mode without saving the selection, but
maintains the current setting until the power to the unit is cycled. This is
useful for experimenting with different settings.