User's Manual

Chapter 2: Infrastructure Device Installation
2-6
July 2006
The antenna must have a separation distance of at least 2 meters from the body of all
persons and must not be co-located or operating in conjunction with any other antenna
or transmitter.
Users and installers must be provided with antenna installation and transmitter operating
conditions to satisfy RF exposure compliance.
When deploying the MWR or IAP, the antenna should be a minimum of 30 inches from
any nearby metal poles to avoid distortion of the RF pattern.
The installation location must provide power to the MWR and IAP.
It is the responsibility of the Network Operator to ensure that the installation complies
with any local building codes and permits.
Grounding Considerations
In order for a grounding system to be effective, a low impedance path to earth ground must be present.
The grounding system must have conductors of sufficient size to withstand the high fault currents that
must be shunted along this path. The lower the impedance the grounding system displays, the better its
capability to perform its task. The impedance requirement for a communications site is determined by
the classification of the site. Sites are broken down into 2 categories: Type A-Light Duty and Type B-
Light Industrial/Commercial. Type A-Light Duty sites have impedance requirements of 25 ohms or
less to ground whereas Type B- Light Industrial/Commercial sites have impedance requirements of
less than 5 ohms to ground. HotZone Duo networks fall into the Type B-Light Industrial/Commercial
category, and therefore must be treated with greater considerations as far as grounding requirements
are concerned.
Since Type B grounding requirements stipulate 5 ohms or less impedance to earth ground, things such
as soil pH, type of grounding rods, size of conductors, and ground enhancing materials must be taken
into account to achieve this goal. To verify the impedance requirements are met, a special
Earth/Ground Resistance Tester (megohmmeter) may be necessary.
To help the HotZone Duo product supply an easy way to be connected to a grounding electrode
system, it is recommended that the following addition be added to the exterior of the enclosure:
The installation of a high strength, thin sheet mounting dog point stud to allow for a
mechanical connection to the grounding system. The stud should be of the HFH PEM
style and of a suitable size to allow for the proper size conductor to be attached via
irreversible crimp style ring terminal. The stud should also employ an anti cross-
threading technology since devices will be field swappable and the devices will be
returned and reused via a RMA policy. The specification recommends using #6 gauge,
stranded wire for the connection of the cabinet to the grounding electrode system. This
wire should be connected to the grounding system with a split bolt compression fitting.
The wire used to make the connection should be green or green with a yellow stripe. The
supplied grounding stud will be specifically designated as the grounding system
attachment point. This stud will be used to connect the HotZone Duo product to any
grounding electrode enhancements needed should the site not conform to Type B
grounding requirements and additional means of grounding electrodes are installed.