Symmetricom TimeSource 3600, Manual

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Engineering & Ordering
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Procedure A. Site Survey
Step Action
1
Determine the shelf location.
2 Determine the best location for mounting the antenna (less than 330 m of cable
from the shelf). Use the guidelines and considerations in the Roof Antenna Location
and Cabling Guidelines section.
3 If a roof-mounted antenna is installed, determine the location of the grounding point
for the lightning suppressor, then determine the location of the lightning suppressor.
The cable length between the lightning suppressor and the grounding point must be
less than 4.6 m. If the grounding point is inside the building, the cable length between
the grounding point and the cable entry must be less than 15 m. Valid lightning
suppressor grounding points are:
• Valid ring ground system (usually for roof-mounted lightning suppressors)
• Structural steel of building (for interior-mounted or exterior-mounted lightning
suppressors, attach with a cad weld)
• Central Office ground plate (usually for interior-mounted lightning suppressors)
4 If a roof-mounted antenna is installed, two lengths of cable are required. Plan the
cable route and measure the length of cable required between the antenna and the
lightning suppressor, and between the lightning suppressor and the shelf.
5 If a window or wall-mounted antenna is installed, plan the cable route and measure
the length of cable required between the antenna and the shelf.
6 Determine the two separate –48 V power sources for the shelf. If only one –48 V
power source is available, it must be cabled to both TimeSource 3600 power inputs.
End of Procedure