Installation Guide
Note: Microsemi recommends posting a "Do not paint" notice to prevent the GPS antenna
from being painted accidentally.
Tips:
n The user can access the connector underneath the GPS antenna by removing the four
recessed screws in the lower half of the GPS antenna with a Phillips-head screwdriver. It
is a relatively easy task and does not violate the weatherproofing design of the antenna.
Typically, users do this to attach an optional in-line amplifier inside the PVC mounting
mast or to replace the standard cable with a longer one. (Avoid unscrewing the PVC
mounting mast from the base of the GPS antenna as this may require a vice and lots of
torque.)
n When extending the length of the cable, observe the recommended configurations in
GPS Cable Configurations/Options (on page 145). Avoid exceeding the recom-
mended lengths by combining the standard 50 foot (15.24 m) cable with the extended-
length cable.
Operating in "Window Mode"
The SyncServer can provide can provide excellent synchronization to UTC if the GPS
receiver has an accurate fix on its position and one current GPS satellite most of the time.
This capability is known as Window Mode.
When a good antenna site isn't available, the user may be able to use sites with limited vis-
ibility of GPS satellites and reduced signal strength, such as:
n Indoors, in a window or skylight.
n Outdoors, on a balcony railing, building corner, or surrounded by tall structures (limited
view)
Window Antenna Placement
For window mounted antenna installations, use the window with the best view of the sky. For
windows with equivalent views, orientations that face the equator are preferred. Generally
more satellites will be in view toward the equator than away from it. East or west facing win-
dows will also work. Polar facing windows will also work but in general are not preferred. Win-
dows that have the best view of the sky are always preferred regardless of orientation.
997-01520-02 Rev. F1.......................................................................... Page 143
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