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1. Status Indicator - This LED displays the
operation mode:
GREEN Normal Operation
RED Mute
Flashing GREEN Low Battery
2. Power/Mute Switch - Press and hold to
turn the unit on or off. Press and release
to mute or unmute the transmitter.
3. Battery Cover - Unscrew the battery cover
and slide down to open the CH88 battery
compartment.
4. Battery Holder - Open the battery holder
by pressing the tab and lifting the cover.
Insert two standard AA (LR6) batteries
here, being sure to observe the plus and
minus polarity markings shown. Although
rechargeable Ni-Cad batteries can be
used, they do not supply adequate cur-
rent for more than four hours. WARNING:
Do not insert the batteries backwards;
doing so can cause severe damage to the
CH88 and will void your warranty.
5. Input GAIN Control - This control adjusts
the transmitter input sensitivity. For
optimal performance, using the included
screwdriver, set the input GAIN control to where you see the CR88 PEAK indica-
tor start to light under high levels, then turn down until the PEAK light stops
lighting.
6. IR Lens - This window is used to capture the infrared signal sent from the CR88
during the IR SET to channelize the transmitter. The battery cover must be open
and the IR Lens facing towards the receiver to load the selected channel.
7. Plastic Screwdriver - Designed for use in adjusting the CB88 input GAIN control
(See #5 Input GAIN Control HH).
Guided Tour - CH88 Handheld Transmitter