Antenna Location Examples - Symmetricom TimeSource 3600 User Manual

Chapter 2 Engineering & Ordering
Antenna Guidelines
The total of obstructions above the mask angle should not obscure more than 25
percent of the total field of view (90 degrees of azimuth see Figure 2-2.).
Figure 2-2. Antenna Location Examples
Notes:
Place the antenna high enough on the tower that obstructions are
below the mask angle; mount the antenna more than 1 meter away
from the tower, and far below the interference of the antennas at the
top of the tower. Tower mounting is the least desirable location
because of the potential for severe multipath, and difficulty in
troubleshooting and maintenance.
Place the antenna high enough that the roof structure and tree are
below the mask angle, and the water tower does not block more than
12.5 percent of the sky.
No single obstruction should block a large portion (45 degrees of azimuth) of the
view.
The most important obstructions are within 400 meters of the antenna. Obstructions
may include, but are not limited to, towers, buildings, other construction, trees, and
high-voltage power lines.
Attempt to avoid locating the antenna within 30 degrees azimuth of the transmission
direction of any transmitting antenna in the area, even if the transmitting antenna
operates at a different frequency. A transmitting antenna may cause the GPS
antenna to become overloaded and reduce its reception capabilities.
The minimum horizontal distance from other receiving antennas is 1 meter.
44 TimeSource 3600 User's Guide 097-72060-01 Revision J – June, 2007