KVH Industries TracPhone V11IP, Руководство по установке

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6
Prevent RF Radiation Exposure
Select a location that is well above any areas
accessible to passengers and crew to reduce the
risk of RF radiation exposure. (See page 1 for an
illustration of the hazard area.)
If mounting the antenna near an accessible area is
unavoidable, you may configure one or two no-
transmit zones to prevent transmissions in
hazardous directions. (See “Set Up No-Transmit
Zones” on page 30 for details.)
Minimize Satellite Blockage
The antenna requires a clear view of the sky to
transmit and receive satellite signals (see
Figure 4). The fewer obstructions, the better the
system will perform.
Avoid RF Interference
Although many variables determine the exact
distance required between the antenna and
radar/high-power radio transmitters, including
transmitter beam properties and the reflective
properties of nearby surfaces, consider the
following general requirements when selecting a
safe antenna location:
• Mount the antenna as far away as possible
from the radar and any high-power radio
transmitters.
• The minimum safe distance and vertical
separation between the antenna and the radar
varies depending on the type and power level
of the radar. Using the table in Figure 5,
mount the antenna at least the minimum
distance away from the radar and maintain at
least the minimum vertical separation above/
below the radar. If mounting the antenna
directly above or below the radar, minimum
distance is 3 ft (0.9 m).
Blocked!
Antenn a
Ve ss el Pl a tform
-24° to 119°
Look Angle
M as t
Figure 4: Blockage from Obstruction
RF emissions from radars and high-power
radio transmitters may damage the antenna
or impair its performance if it’s improperly
positioned within the beam path.
IMPORTANT!
Figure 5: Minimum Distances from Radar
Radar
Type Radar
Power Minimum
vertical
separation
(±xxº) Minimum
distance
away (d)
X-band Up to
50 KW
±15º 3 ft (0.9 m)
S-band Up to
10 KW
±20º 6 ft (2 m)
30 KW ±30º 9 ft (3 m)
50 KW ±30º 14 ft (4.5 m)
Antenn a
d
+xx°
Antenn a
Antenn a
-xx°
d
R a d a r
Antenn a
Continued
Plan the Antenna Installation
2