Technical data

Chapter 2 - Installation
Be especially wary about mounting the antenna directly onto the fascia
of a flat roof. To overcome this situation, elevate the pole about 1 meter
above the flat surface.
A satellite prediction program may usefully be employed to check a
potential installation, and also to identify directions in which
obstructions may be a particular source of problems.
The antenna is connected to the GPS Receiver by a coaxial cable fitted
with TNC connectors at each end. Where possible, avoid exposing the
cable and connectors to weather and other environmental conditions.
T
o install the antenna:
1. Insert the antenna cable through the bracket and the tightening
pipe.
2. Fasten the tightening pipe to antenna.
3. Insert 2 U bolts through the mounting pole and connect to the
bracket.
4. Insert flat Washers & Spring Washers & Nuts and close.
NOTE
Except for very temporary periods, it is desirable that the antenna TNC connector
should be protected from the effects of weather. When connecting the cable to the
antenna, a smear of silicone grease (not supplied) will provide added protection.
The connector supplied is designed to be weather proof. It should not be
altered or refitted to another cable. Otherwise, the connection may not
be fully protected from a hostile environment, leading to operational
problems.
When the GPS Receiver is operational, the antenna assembly may be
disconnected for short periods (e.g. maintenance or repair) without
interruption to the unit outputs.
Lightning Protection Considerations
As the antenna is roof mounted (to have a clear view of the sky) it is
likely to be exposed to lightning strikes. Protection against this is
afforded by ensuring adequate grounding of the mountings as described
below.
GPS Timing Receiver Installation and Operation Manual
2-4