Antenna Mounting And Considerations; Antenna Mounting Location With Respect To Rf Signal; Figure 13. Limitless™ Switch To Wpmm Antennas With Rf Signal Line Of Sight Free From Obstacles; Figure 14. Limitless™ Switch To Wpmm Antennas With Rf Signal Line Of Sight Affected By Obstacles - Honeywell Limitless WPMM Series Installation And Technical Manual

Limitless™ WPMM Series
7.2

Antenna Mounting and Considerations

7.2.1 Antenna Mounting Location with Respect to RF Signal

WARNING
RF EXPOSURE
To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance of 20 cm
[7.87 in] or more should be maintained between the antenna of this device and persons during device
operation. To ensure compliance, operation at closer than this distance is not recommended. The antenna
used for this transmission must not be co-located in conjunction with any other antenna or transmitter.
Failure to comply with these instructions could result in death or serious injury.
There are several environmental factors to consider with respect to antenna location during installation. These
factors can affect the radio frequency (RF) signal strength being both transmitted and received by the Limitless™
switch and corresponding WPMM monitor. It is desirable for the antenna to be mounted to limit exposure of adjacent
materials/objects between the Limitless™ switch and WPMM monitor, as they will have an effect on RF signal
strength. If the mounting location for an omni-directional antenna is on the side of a building or tower, the antenna
pattern will be degraded on the building or tower side.
Obstacles that affect antenna patterns and RF signal strength:
•
Indoor: Concrete, wood, drywall, and metal walls, etc.
•
Outdoor: Vehicles, buildings, trees, structures, topology, weather conditions, chain link fence, major power
cables, etc.
Best performance is achieved when antennas for both the Limitless™ switch and WPMM monitor are mounted at
the same height and in a direct line of sight (LOS) with no obstructions. Generally, the higher the antenna is above
ground, the better it performs. Another concern is RF interference, discussed in Section 1.5.3.
Figure 13. Limitless™ switch to WPMM Antennas with RF Signal Line of Sight (LOS) Free From Obstacles
Figure 14. Limitless™ switch to WPMM Antennas with RF Signal Line of Sight (LOS) Affected by Obstacles
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