8
Installation
2.1 Site Inspection and System Location
Consider the following requirements when planning system installation and choosing a location for the VS4500 and other
system components:
1. If the optional GPS receiver is used, it should be installed where it is exposed to the sky, parallel to the horizon and
unobstructed by trees, power-lines, etc.
If the GPS receiver is installed indoors, mount it at the lower edge of a window, away from Low E glass and exposed to
the sky.
2. Choose a location that is easily accessible in case you need to perform maintenance on the antenna.
3. The transmitting antenna should be located as close as possible to the center of the site and should not be surrounded
by large metal objects that may block the RF signal and decrease the coverage range of the system.
4. The transmitting antenna may be mounted vertically upward, NEVER horizontally.
5. Magnetic Mount antenna (such as VS638) should be attached to a large metal object (like an air duct, metal shelf or
cabinet) to provide it with a proper grounding. It may be mounted vertically upward or downward.
6. Base Station antenna (such as included with VS654 kit) should be secured to a well-grounded metal structure or to a
pole on the roof.
Locate a path for running the coax cable between the antenna and the transmitter such as a riser (if there is no existing
path, create one).
Place the external transmitter in a location that is as close as possible to the roof such as in the penthouse. Keep the
distance between the antenna and the transmitter as short as possible to minimize RF power loss.
2.2 GPS Receiver Installation (optional)
1. The optional GPS receiver can be mounted indoors or outdoors. Outdoors installation is highly recommended for
optimal reception.
2. The GPS receiver should be installed where the distance to the VS4500 is not more than 100’.
3. If the GPS receiver is installed indoor (not recommended), mount it at the lower edge of a window, away from Low E
glass and exposed to the sky.
4. If the GPS receiver is installed outdoors, mount it in a location protected from direct sun or rain.
5. If the GPS receiver is installed outdoors, secure it the structure or to the wall-mounting “L” bracket included with your system
that allows mounting of the antenna on the side of a building or other structure.
6. Connect the GPS receiver to the COM1 serial port and set the serial port to the required settings (see page 16 for more details).
2.3 Magnetic Mount Antenna (VS638) Installation
1. Secure the antenna to an adequate grounding surface, HVAC duct or metal “I” beam. The antenna should be mounted vertically
upward or downward, NEVER horizontally.
2. Choose a mounting location that will provide an adequate grounding surface and free space for RF radiation. If the antenna is
mounted too close to metal or closed heavy concrete walls room, a high VSWR may occur which in the long term may cause
damage to the transmitter.
3. The optional wall-mount “L” bracket allows mounting the magnetic antenna on the side of a building or other structure, providing
the roof’s overhang is not excessive.
Note: The antenna should be located as far from the VS4500 and transmitter as the coax cable allows.
2.4 Base Station Outdoor Antenna Kit (VS654) Installation
1. To achieve maximum performance for your outdoor antenna choose a location that is unobstructed by trees, branches, power-
lines, etc. Never mount the antenna where there is a signal-reflecting surface such as metal, power lines, mirrored glass, etc.
2. Choose a location that is easily accessible in case you need to perform maintenance on the antenna.
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