Symmetricom TimeSource 3000 Manual page 30

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Figure 6 Sample Rooftop Antenna Mount
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• The minimum horizontal distance from vertical reflective structures (e.g., heating
ducts, equipment housings, etc.) is twice the height of the structure or 10 feet
(Figure 6).
• The minimum vertical distance above parapets, obstructions, or horizontal metallic
reflective surfaces is 4 feet.
• Do not locate the antenna within 30 degrees azimuth of the transmission direction of
any transmitting antenna (to avoid overpowering the GPS reception, even though
the transmitting antenna may operate at a different frequency).
• Do not locate the antenna underneath high power lines. If this cannot be avoided,
ensure the antenna is placed at least twice as far from the power line as the power
line is high (to avoid danger to personnel and multipath effects).
• Mount the antenna in a location with easy and safe access for future maintenance
purposes.
• Mount the antenna on a mast of 1 inch diameter galvanized metal pipe
(recommended). Do not use metal as a cable conduit.
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TimeSource 3000
Engineering and Ordering
097-72000-02 Issue 6: October 2003
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