User's Guide

Specification 915 MHz Mobile Antenna
Impedence 50 ohms
Termination 1-1/8-inch 18 thread mount
Overall dimensions 26.5-inch length x 1.43-inch diameter
Installing the Antenna
Installation of the antenna includes the following tasks. Perform the tasks in the order shown
in the following list.
1. Selecting an Antenna Location on the Vehicle below
2. Installing the Permanent Antenna Mounting Base on the next page
3. Installing the Magnetic Antenna Mounting Base on the next page
Selecting an Antenna Location on the Vehicle
The antenna remains installed on the vehicle. The manufacturer's instructions, which ship
with the antenna components, are summarized in the following procedures. Itron recom-
mends consulting the antenna manufacturer's instructions in addition to this guide.
Note: Do not trim, shorten, or secure any cabling until you are confident
of its routing.
Location selection criteria include the following.
Access from inside the vehicle to the exterior antenna mounting location is usually required.
If the vehicle has a headliner, remove nearby trim pieces or even a dome light to gain access
to the mounting location.
Install the antenna a minimum of 12 inches from any other antennas or metal structures on
the vehicle's roof that could disrupt communication with endpoints. 30 inches is recom-
mended.
Select a location on the vehicle's roof that has as flat a surface as possible. The metal of the
roof must be 0.02 to 0.04 inches thick.
The location should be no more than one inch deep and at least 2.5 inches in diameter to
properly secure the antenna base.
To meet RF exposure safety requirements, the antenna must be installed a minimum of 21.7
inches (55 centimeters) from where any bystanders may be located.
14 May 2019 TDC-1719-002 12
Itron Mobile Radio User Guide 7. Installing the IMR-XA and IMR-FT