3
An external antenna (50Ω) is required for the MXT575. The antenna is intended to be attached to the
vehicle’s roof, trunk or similar location. Specific installation requirements vary between vehicles. Use the
following guidelines to install the antenna:
*Where you locate your antenna does make a difference*
1.
Metal surfaces covered by fiberglass or vinyl may affect radio range. Avoid these locations.
2.
Mount the antenna as high on the vehicle as possible. The higher the better.
3.
If possible, mount the antenna in the center of whatever surface you choose.
4.
The antenna cable is 19.7 feet (6 meters) long. Be sure the mounting location will allow for
connection of the cable to the radio.
5.
Be sure the mounting location is clean and dry before installing the antenna.
6.
Route the antenna cable through an accessible entry point, such as a rear door or trunk opening.
7.
When routing the antenna cable inside the vehicle, keep the cable away from noise sources,
such as the ignition system, gauges, etc.
8.
Exercise care to prevent cable damage. Make use of existing gaskets, grommets and weather
stripping to protect the cable along its route.
CONNECTING THE RADIO TO A POWER SOURCE
1.
Connect the positive lead (RED wire with in-line fuse holder) to either (a) the fuse block or (b)
directly to the positive post of the vehicle’s battery.
NOTE: The fuse block is usually the most convenient connection point. The power cord positive lead can
also be connected to the Accessory terminal on the fuse block or ignition switch, so the radio
automatically turns off when the ignition is turned off.
2.
Tightly connect the ground lead (BLACK wire) directly to the vehicle’s metal frame. A good direct
metal-to-metal ground is essential for optimum performance.
CONNECTING THE MICROPHONE
Insert the RJ45 connector into the front of the MXT575.
USING AN EXTERNAL SPEAKER
The MXT575 provides a rear-panel jack for connection of an optional external speaker (sold separately).
The rear-panel jack is compatible with 3.5mm audio connector. When selecting an external speaker,
ensure the speaker has 8-ohm impedance and is rated for 4 Watts. NOTE: When an external speaker is
connected, the base unit internal speaker is automatically disabled.
USING AN INTERCOM
The MXT575 provides a rear-panel jack and supplied cable assembly for connection to an intercom or
headsets with a TA5 mini XLR connector.
CONTROLS AND INDICATORS
