User's Manual

DRAFT TrimTrac Locator Technical Manual 22
Use Guidelines
Introduction
The TrimTrac locator is a completely self-contained end-user device. As such no
specific installation is required. There are not external connections required for
antennas or power when used in its standard battery-powered configuration. Like
all GPS and wireless devices, the TrimTrac locator will work best where it can
have a relatively unobstructed view of the sky and wireless base station antenna.
Nonetheless, the TrimTrac locator employs advanced GPS technology that
increases its ability to acquire weak GPS signals. This allows the device to be
deployed in environments where traditional GPS receivers may not be able to
determine location.
General Guidelines
Placement and Orientation
Generally, the TrimTrac will perform best when used as close as possible to
horizontal plane, preferably with reasonably unobstructed clearance around the
unit. Field test indicate that the TrimTrac locator will perform reasonably well
when placed in the glove box or under the front passenger seat in many
contemporary automobiles. It should not be installed in the trunk of a vehicle
unless it can be place near or under the rear window package shelf. Try to avoid
placing the unit where its view of the sky is obstructed by metal or surfaces
painted with metallic paint.
RF Jamming
The TrimTrac locator should be installed as far away as possible from
transmitting antennas, including satellite communication, radar, VHF and cellular.
These transmitters may emit jamming signals that interfere with the GPS
receiver’s ability to track GPS satellite signals. Generally, the stronger the other
transmitting device, the wider the distance required between antennas. For the
TrimTrac locator, a minimum clearance of 45 cm (approximately 18 in.) from
these transmitting devices is recommended.
Mounting
The TrimTrac locator is provided with mounting tabs that can be used to secure
the device to a flat surface using screws or similar fasteners. In the event these
mounting tabs are not to be used, they can be broken-off by working them back
and forth.