An AC power cable comes with each DXL8000 IDU. The DXL8000 IDU supplies -48V DC
power to the Outdoor Unit (ODU) from the rear panel
ODU DC ON COAX
Type N connector.
WARNING - RF Power Hazard
WARNING
The unit has high levels of RF power. Exposure to RF or microwave
power can cause burns and may be harmful to health.
• Remove power from the unit before disconnecting any RF cables and before inspecting
damaged cables and/or antennas.
• Avoid standing in front of high gain antennas (such as a dish antenna) and never look
into the open end of a waveguide or cable where RF power may be present.
The following guidelines for safe operation were derived from OET bulletin 65, August 1997, as
recommended by the Federal Communications Commission (FCC).
The DXL8000 was designed to provide services to licensees under 74 CFR, subpart F,
television broadcast auxiliary stations, and under 101 CFR, subpart H, private operational fixed
point-to-point microwave service. This unit, operated without an antenna, will not create RF
energy exceeding 1.0 mW/cm
2
, the FCC limit for exposure. Once connected to an antenna, the
potential for harmful exposure will be greatly enhanced.
In this situation, a certain distance from the radiator is to be maintained. Calculations need to be
Permissible Exposure (MPE) limit.
Calculations provided are for common antennas often utilized in point-to-point applications. The
following formula used is that suggested by OET 65.
2.2.2 Calculating MPE
EIRP
=
P *
[
10
(
G / 10
)
]
=
(
AntiLog of G/10
)
* P
P
= RF power delivered to the antenna in mW
G
= Power gain of the antenna in the direction of interest relative to an isotropic radiator
R
= distance to the center of radiation of the antenna in centimeters
S
= MPE in mW/cm² (milliwatts per square centimeters)
Conversions
dBi to numeric gain = AntiLog (dBi/10) Feet to centimeters = Feet
*
30.48
Centimeters to Feet = cm
*
.0328
4
π
= 12.57
User Input
RF power delivered to the antenna = Watts
Antenna gain (referenced to isotropic antenna) = dBi
Distance from the center of radiation = Feet
2-2 Installing the DXL8000
DXL8000 User and Technical Manual
Содержание DXL8000
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