Infrastructure Device Deployment And Installation; Grounding Considerations; Figure 2-9 Bandpass Filter Example - Motorola MOTOMESH Duo 4300-49 User Manual

Figure 2-9

Infrastructure Device Deployment and Installation

MOTOMESH devices require professional installation to ensure that the installation is performed in
accordance with Motorola installation standards. All common precautions for grounding and
electrostatic discharge protection should be observed during deployment and installation.
To eliminate risk of electric shock, DO NOT connect/disconnect cables while units are
energized.
Observe the following additional guidelines when deploying fixed Infrastructure devices:
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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. MOTOMESH networks fall into the Type B-Light Industrial/Commercial
May 2008
BandPass Filter Example
The MOTOMESH Duo 4300 device may be mounted on a pole having a diameter of 1-
3.5 inches, utilizing the provided brackets.
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 MOTOMESH Duo 4300 device, the antenna(s) 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 MOTOMESH DUO 4300 Device.
It is the responsibility of the Network Operator to ensure that the installation complies
with any local building codes and permits.
MOTOMESH DUO 2.1 4300 Users Guide
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