Installation Guide

nearby metal surfaces, or other obstructions might interfere with the proper operation of the
antenna.
■
Do not mount the antenna on a rooftop where nearby buildings are higher than the
installation location.
■
Do not mount the antenna near existing RF radiating antennas. If existing RF radiators are
nearby, the horizontal separation distance must be a minimum of 30 meters and/or three
meters of vertical separation. In instances where nearby RF radiators are present, conduct
an inter-modulation interference study to evaluate the potential for interference and any
effects it may have on system performance. Consult your Itron systems engineer for more
information.
■
Height is preferred for optimal performance. Itron typically recommends installing the
antenna no higher than 20 to 30 meters. Check with your systems engineer.
Caution: Do not install a 5.5/5.15 dBi antenna directly on the CGR. Antenna
installation directly on the CGR will compromise mechanical integrity and will not meet
the compliance requirements. See 915MHz 5.5dBi Remote Antenna Kit and
915MHz 5.15dBi Remote Antenna Kit.
Caution: Do not install a 8.15 dBi antenna directly on the CGR. Antenna installation
directly on the CGR will compromise mechanical integrity and will not meet the
compliance requirement for a loss of 2.2dB (for any exceptions, there is additional
information, see RF Filter Installation) between the RF filter and the 8.15 dBi
antenna. See 915MHz 8.15dBi High Gain Remote Antenna Kit 915MHz 8.15dBi
High Gain Remote Antenna Kit
A side-arm antenna installation must be done if the antenna is mounted where it does not have
an unobstructed 360-degree view. Refer to the following guidelines for a side-arm antenna
installation:
■
The minimum standoff distance is 60 centimeters, where the interfering structural members
are 10 centimeters or less in diameter and spaced more than two meters apart.
■
For structural members between 10 and 25 centimeters in diameter, use a sliding scale of
0.6 to 1.5 meters (for example, a 60-centimeter standoff at 10-centimeter diameter to a 150-
centimeter standoff at 25-centimeter member diameter).
Remote Antenna Connections & the Lightning Arrestor
When using a remote antenna, you must install a lightning arrestor to protect the CGR in the
event of a lightning strike. The lightning arrestor is fitted between the coaxial antenna cable and
the CGR (or the RF Filter, if applicable). The protected end of the arrestor connects to the N
02 March 2020 815-0080-00 Itron, Inc. Page 36 of 102
OpenWay® Riva CAM3S and CAM3M Installation Guide 4 Star and Mesh Deployment Installation