Access Point Deployment Guide
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its subsidiaries, affiliates, and/or licensors. This document is provided subject to the confidentiality obligations set
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Figure 5.
PCTEL GPS Model GPSL1-TMG-SPI-40NCB
The PCTEL GPSL1-TMG-SPI-40NCB GPS antenna has a type-N female connector.
Note:
Most GPS antennas have a Low Noise Amplifier (LNA) that requires power from the
AP. The AP supplies 3.3 V at up to 50 ma. If this current is exceeded, the AP detects
the excess current and shuts down its GPS power supply. When this occurs, the AP
sends a GPS antenna fault message back to the EMS. The AP must be power cycled to
restore power to the GPS antenna.
Antenna Cable Lightning Suppression and Grounding
A coaxial surge suppressor must be installed at the location shown in the table below and must
be connected with a #10 gauge or larger stranded wire to an appropriate ground for lightning
protection. In most tower installations, the outer shield of the AP antenna cable must be
grounded with one or more grounding kits provided by the antenna cable manufacturer. The
grounding kits must be connected to appropriate building or tower grounds using a #2-gauge
wire. The mounting pipe for the antenna should be grounded to the same point if it is not
attached to a grounded structure.
Table 4.
Surge Protector Mount Locations
Coaxial System Mount Location
Mount Location of Surge Protector
Indoors
Entrance to the first external wall
Outdoors
Antenna connector of the Access Point
Outdoor Enclosure
Entrance to the enclosure
