Symmetricom EDGE CLOCK 1000 User Manual page 72

Chapter 3 Installing the TimeProvider
Making Connections
Warning: To prevent arcing, ensure that the lightning suppressor is
installed away from electrical devices and cabling.
Warning: To prevent possible damage to the TimeProvider, use only
the lightning suppressor supplied with the antenna kit.
Note: Use the following antenna installation instructions as a
guideline only. Install the antenna using company-approved
techniques, and follow all appropriate local building and electrical
codes.
Note: To achieve optimum results, the TimeProvider GPS rooftop
antenna requires a minimum cable length of 8 meters (27 feet) from
the antenna to the TimeProvider system; this overall length includes
the cable section to the lightning suppressor.
Recommendation: Symmetricom recommends that you use one of
the following grounding points:
Order two cables, or a single cable run can be made from the antenna
to the TimeProvider shelf. The cable can then be cut at the lightning
suppressor location, and TNC connectors attached to the cut ends of
the cable. The "xx" in the part number indicates the cable length.
72 TimeProvider User's Guide
Valid roof ring ground system.
Cad weld to building structural steel.
Central office ground plate within 15 m of antenna cable entrance
into building.
097-58001-02 Revision G – April 2008