In order to initialize correctly the unit MUST have at least FOUR satellites
Ideally a minimum of 5 satellites should be in view so as satellites go out
of view over horizon and new satellites come into view, the unit always
sees at least 4 satellites without interruption.
Also unit stability will be improved when more satellites (up to 8) are
simultaneously viewed, therefore, positioning careful positioning of
antenna is critical not only units basic functionality but also in terms of
optimizing unit performance.
The supplied antenna is of the “bullet” type and is enclosed in a
weatherproof housing for outdoor installation. The antenna should be
mounted in an exposed location with a clear view of the sky, as far as
possible free from obstructions. In the Northern hemisphere, south facing
locations are preferable.
To avoid receiving multi path signals (additional signals reflected from
other surfaces) try to avoid placing the antenna close to vertical
obstructions that are above the plane of the antenna.
An antenna mounting kit is supplied to assist with installation
4.4. Antenna Cable
A 30ft RG-58 coaxial cable is supplied with the unit to connect the antenna
to the ptf 3203A GlobalTyme chassis by means of a TNC style connector.
Sections of the cable that are exposed to the elements should be wrapped
with protective, weatherproof insulation.
The cable should be fixed with adequate strain relief to avoid strain on the
interconnections. Longer cable lengths are available from Precise Time
and Frequency, Inc. if required.
Note: The chassis should not be powered until the antenna is installed
and connected. Functionality of the unit is dependent upon the
successfully completing initialization which can only be completed if
the unit views at least four satellites.
The antenna cable should not be fitted or removed while the
unit is powered ON as damage may result to the unit
The protective earthing connection shall always to be
connected before the any servicing is to be conducted.
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