Locating The Gps Antenna - Symmetricom TimeProvider 100 User Manual

Antenna position
Antenna
field of view
10°
Mask Angle*
Horizon
Equator
* An angle of 10° masks objects up to about 3.5 ft above the
horizon at 20 ft from the antenna (illustration at right).
Figure C-1.

Locating the GPS Antenna

Caution: To avoid damage to the GPS antenna, do not place the
antenna where high-power radio signals are beamed directly at the
unit. Such signals can damage the preamplifier of the GPS antenna.
098-00106-000 Revision A – March, 2009
Warning: To avoid serious injury to personnel or damage to
equipment, exercise caution when working near high voltage lines.
In particular:
Use extreme caution when installing the GPS antenna near,

under, or around high voltage lines.
Follow local building electrical codes for grounding using the

frame ground lug on the TimeProvider 100 chassis.
The in-line amplifier receives 5 VDC power from the GPS radio

receiver, and is supplied on the center conductor of the LMR-400
or equivalent coaxial cable. If the application requires an in-line
amplifier, mount the amplifier/plate assembly where the transient
eliminator would normally be mounted.
Symmetricom does not recommend cutting the antenna cables

provided in the GPS Antenna Kit.
Chapter C Installing the GPS Antenna
No single obstruction more
than 12.5% of field of view
Total obstructions
no more than 25%
of field of view
10°
20 ft
TimeProvider 100 User's Guide 113
Installing Antennas
Obstructions
toward Pole
if possible
10°
Mask Angle
Pole
3.5 ft