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GAIN CONTROLS

Turn the gain controls clockwise to increase gain and counterclockwise to decrease
gain. At the maximum setting, the voltage gain of the amplifier is +35 dB, and a 1.26V
input signal produces 70V at the output.
The Gain controls are marked in dB of attenuation. There are 21 detents for repeatable
adjustments. The upper 14 steps are about 1 dB each, and settings should normally be
made within this range. The range below -14 dB should not be used for normal program
levels, as the input headroom could be exceeded, but can be used for testing at reduced
levels. At the minimum setting, the signal is completely cut off.
The Gain controls are recessed and can be adjusted with a small screwdriver or flat
tool. If desired, the Gain Control Security Cover can be installed to prevent changes to
EN
the installer's settings.
GAIN CONTROL SECURITY PLATE
The cover blocks access to the Gain settings. The LED indicators are still visible to mon-
itor the system's operation.
1. Use a 9/64" or 3.5 mm hex driver to loosen the screw several turns. Do not remove it
completely.
2. Slide the right end of the cover under the loosened screw.
3. Insert the left end tabs into the last row of ventilation slots, and slide the panel fully
to the right. It should lock into the slots.
4. Confirm that the LED's are visible through the cover. Tighten the hex screw carefully.
8
Channel-pair control and indicator
group on the CX108V. Power LED is to
the left of Ch.1-Ch.2.

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