Andrew DB201 Series Инструкции по установке
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Installation Instructions
Ground Plane Omni Antenna
DB201 Series
GENERAL INFORMATION
The DB201 antenna features a unique molded epoxy feed-
through insulator. This design affords easy replacement of
the connecting lead by means of a male-to-female connec-
tion which is completely protected from the weather.
Unless otherwise specified when ordering, each antenna is
cut to frequency at the factory and adjusted for minimum
VSWR. As a result, no field tuning or adjustment is required.
If ordered uncut, a cutting chart is provided separately.
These antennas are designed for mounting above the top of
a tower or wooden pole, and best operation is obtained when
the ground plane rods are above all objects.
Should metal objects extend above the level of the ground
plane (or it is necessary to mount the antenna on the side of
a tower) the radiation pattern will be distorted. The shape of
the pattern will depend on the frequency of operation, the
size of the tower, and the distance between the antenna and
tower. Radiation "through the tower" will be lower than from
other directions. If a more specific pattern is desired, please
contact Andrew's Applications Engineering with tower and
mounting specifics.
INSTALLATION INSTRUCTIONS
1.
After removing the antenna from the shipping box, in-
spect it to ensure all parts are on hand and that there is
no physical damage.
2.
Inspect the antenna feed output connector to determine
that it mates with the end of your station transmission
line.
3.
Verify that the frequency to which the antenna has been
tuned is the frequency on which your radio system is to
operate.
4.
Mount the antenna to the support pipe using the DB365
mounting clamp(s), supplied with the antenna. This
clamp fits round members from 1-1/4" to 3" OD and
angle members up to 2-1/2" on a side. A single clamp is
provided with DB201 antennas at frequencies above
Do not install near power lines. Power lines,
telephone lines, and guy wires look the same.
Assume any wire or line can electrocute you.
Figure 1. DB201 Antenna; Inset - DB365-OS Clamp
Do not install on a wet or windy day or when
lightning or thunder is in the area. Do not use
metal ladder.
Bulletin 095001-000
Revision K • November 2003 • Page 1 of 2
(continued on page 2)
Wear shoes with rubber soles and heels.
Wear protective clothing including a long-
sleeved shirt and rubber gloves.