RUGGEDCOM WIN7251
Installation Guide
Chapter 2
Installing the Base Station
Installing an External GPS Antenna
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4. Make sure the antenna is properly grounded according to local standards.
Section 2.6.2
Installing an External GPS Antenna
The RUGGEDCOM WIN7251 base station is equipped with an internal omni-directional GPS antenna. This is ideal
for indoor applications, but for outdoor applications, an external antenna may be required. The application may
also require a directional – as opposed to omni-directional – antenna.
CAUTION!
Interference hazard – risk of frequency disruption. The cable used to connect the GPS antenna to the
base station must not exceed 22 m (72 ft) in length, otherwise it may act as an antenna itself and
generate interference. Only use the CAT-5 cable provided with the base station.
To install an external GPS antenna, do the following:
IMPORTANT!
The antenna installation must be as per Article 810 of the NEC. Of particular note is the requirement
that the grounding conductor not be less than 10 AWG (Cu). The scheme should be either:
• in accordance with UL 96 and 96A Lightning Protection Components and Installation Requirements
for Lightning Protection Systems
• tested in accordance with UL 50 and UL 497
1. Mount the antenna to a pole or wall in an area that provides good signal coverage and is away from any
signal noise emanating from other communications equipment. Make sure 55% of the sky at minimum is
visible to the antenna(s).
2. Using one of the supplied CAT-5 cables, connect the antenna(s) to the supplied lightning protector.
6
6
5
1
2
4
3
3
Figure 7: Antenna and Lightning Protector Assembly
1.
GPS Antenna
2.
Ground Wire
3.
CAT-5 Cable
4.
Lightning Protector
5.
Base Station
6.
Drain Wire
3. Using the supplied CAT-5 cables, connect the lightning protector to the
GPS
port on the base station.
4. Make sure the antenna is properly grounded according to local standards.
