■
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
recommended.
■
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.
■
The diameter of the ground plane at the antenna base should be at least three feet for best
performance. Ideally, the ground plane should be a minimum of three times the wavelength
being received. For example, a 900 MHz signal, having a 13 inch wavelength, should have a
ground plane of 39 inches.
Installing the Permanent Antenna Mount
The permanent antenna mount is installed through the roof of the vehicle.
1. Drill or cut a ¾-inch diameter hole in the vehicle where the permanent mount antenna is to be
located.
2. Carefully feed the connector and coaxial cable through the hole from the top side and thread
it out of the headliner near the IMR-FT mounting location.
3. Insert the rest of the cable and the lower tabs of the mount body through the hole from the
top.
01 September 2020 815-0410-00 22
Itron Mobile Radio User Guide Chapter 7 Installing the IMR-FT
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