User's Guide

- 23 - CalAmp Proprietary & Confidential
5.2.1 Size and Placement of LMU Unit
The dimensions of the LMU should be taken into account, particularly when installing in a
vehicle:
Whether you intend to place the LMU under a seat or into a cavity behind the vehicle‘s
interior molded trim, be sure the LMU will fit before drilling any holes or running cable
Be certain that the cables running to the LMU will not be bent or constricted. Damage to
the cables may impede the LMU‘s performance.
 Be certain that the installation point will not violate any of the LMU‘s environmental
specification (temperature, moisture, etc…) as improper installation of the LMU may
void the warranty.
See the LMU Environmental Specifications for the exact measurements and specifications of
the LMU0200G.
Typical installations will place the LMU under the vehicle dash board, or in the trunk. Make
sure you can get access to the unit afterwards as under some circumstances it may be
necessary to add additional wiring or connections to the LMU.
The LMU0200G uses an internal antenna for both GPS and Comm. As a result, improper
placement of the LMU can have The GPS and Comm antennas are located on top of the
LMU0200G.
5.2.1.1 Placement of Combination and Internal antennas.
When dealing with combination antennas, it is more important to considered GPS
performance over Comm performance. GPS signal strengths are much lower than those
typically seen by cellular networks supported by the LMU. In order to maximize the
performance the LMU0200G should have a clear view of the sky as possible. When
installing the GPS antenna in a vehicle, make sure that there are as few obstructions as
possible close to the LMU that might block the view 360 to the horizon. Ideally, nothing
should not block the antenna beyond 5 above the horizon with the best location being near
the center of the roof. For more covert installs, directly under the front or rear-windshields
are also acceptable.