Battery Selection and Installation
Channel Address Selection
Power On/Off
Power LED and Low-battery Warning
Audio/Mute LED
Link LED
Soft-touch Button
13
mtu101 Boundary Microphone
Transmitter Controls
The mtu101 Boundary Microphone Transmitter operates on two AA batteries (standard alkaline
or rechargeable). Please make certain that your batteries are fresh or fully charged. Two AA 1.5V
alkaline batteries are included with each transmitter. SANYO rechargeable 2700 mAH NiMH AA
batteries (preferred for best battery-life performance) are included with the optional cei007
Charging/Encryption Interface.
Note: Other models of NiMH batteries may work, but the
cei007 and the mtu101 are optimized for use with SANYO 2700 mAH NiMH AA batteries.
1. Open the battery door by sliding the button down.
2. Insert two fresh or fully charged AA batteries into the battery compartment, being careful to
observe correct polarity as marked on the inside of the door.
3. Close the battery door.
Channel address selection is via a rotary switch on the bottom of each microphone/transmitter.
The switch is numbered for channel addresses 1 through 14; these channel addresses
correspond to the audio outputs on the aci707 unit. Use a small flat-blade screwdriver to select
a different channel address for each microphone (you cannot have two microphones on the
same channel address). The aci707 comes from the factory set for channel addresses 1 through 7.
If you wish to use it for channel addresses 8 through 14, change the DIP switch on the back panel
of the aci707 as described in
DIP Switch 4 selects high or low channel addresses
on page 12.
A slide switch on the bottom of each microphone/transmitter turns the unit on and off.
The Power LED (A-T logo) on the top of the boundary microphone transmitter glows blue to
indicate the power is on.
When battery performance is low, the Power LED (A-T logo) will blink as a warning. When the
system is linked, a bottom orange LED on the corresponding aci707 channel will illuminate to
provide additional indication of low battery status.
When a boundary microphone transmitter’s audio is on, the elliptical Audio/Mute LEDs glow blue.
When the unit is muted, the LEDs are off. A red light on the corresponding aci707 channel
indicates audio on. (See
LED indicators
, page 10.)
The Link LED glows blue to indicate the boundary microphone transmitter is properly linked to
the system. (The top green light on the corresponding aci707 channel also lights.)
A soft-touch button on the front face of the microphone operates as a mute (press on/off)
switch or a control switch; to change mute status, depress the soft-touch button. Choose the
function of the button (Push-to-talk, Push-to-Mute, Toggle, and Off) at the SpectraPulse
™
aci707
Audio Control Interface. (See
DIP Switches 1 & 2 control microphone/transmitter button
function
and
DIP Switch 3 offers “Local/Remote” control function
on page 12 for details.)
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