HARRIS CORPORATION TR-0103-E ユーザーズマニュアル
14222-5000-3000
21
4.3.1
Surge Protection Devices (SPDs)
All RF transmission lines and surge protection devices (SPDs) should be grounded in accordance with
procedures
procedures
presented
in
Site
Grounding
and
Lightning
Protection
Guidelines
manual
AE/LZT 123 4618/1. PolyPhaser
®
or similar SPD devices are required for all RF, phone, or on-site
control lines entering the building from external sources. For GPS antenna installation, Harris
recommend using a GPS surge arrestor, part number HD-TM1M-02, inline with each GPS antenna.
recommend using a GPS surge arrestor, part number HD-TM1M-02, inline with each GPS antenna.
4.4 INSTALLING THE EQUIPMENT
The HDT300 is designed to be installed in a 19-inch rack or cabinet. A ground bus bar should be utilized
to minimize ground loops and the potential for electrical surges, such as lightning, from traveling through
the equipment while dissipating to the grounding system.
to minimize ground loops and the potential for electrical surges, such as lightning, from traveling through
the equipment while dissipating to the grounding system.
Carefully pre-plan the rackup, locating the fan shelf directly under each transceiver shelf, and ensuring
adequate air flow above and below the rackup. It is also recommended to install the modules after the
shelf is fully installed, the grounding bus bar system is fully installed and the bus bar is properly grounded
to the site grounding system.
adequate air flow above and below the rackup. It is also recommended to install the modules after the
shelf is fully installed, the grounding bus bar system is fully installed and the bus bar is properly grounded
to the site grounding system.
Additionally, it may be beneficial to begin installing equipment from the bottom of the rack or cabinet
and building up the rail. It is recommended to follow the steps shown in the following sub-sections when
installing equipment.
and building up the rail. It is recommended to follow the steps shown in the following sub-sections when
installing equipment.
The first transceiver and fan shelf installation supports the first four (4) RF channels. For sites with five
(5) or more RF channels, multiple transceiver and fan shelf installations are preformed. Typically, two
(2) individual rackups consisting of a transceiver shelf, fan shelf, and EIB may be installed per the
average tall rack or cabinet (supporting RF channels 1 through 8). For RF channels 9 through 16, a
second cabinet or rack is typically required.
(5) or more RF channels, multiple transceiver and fan shelf installations are preformed. Typically, two
(2) individual rackups consisting of a transceiver shelf, fan shelf, and EIB may be installed per the
average tall rack or cabinet (supporting RF channels 1 through 8). For RF channels 9 through 16, a
second cabinet or rack is typically required.
4.4.1
Installing the Fan Shelf
1. Determine the installation location
along the rails and if required, install
screw clips in the two (2) screw
locations.
screw clips in the two (2) screw
locations.
2. Install screws in the two (2) mounting
locations.
3. Install a ground wire from the fan shelf
rear panel to the ground bus bar.
For
best
performance,
equipment
ground wires should be constructed
using
using
UL-listed
compression-type
connectors and 14-gauge or larger
stranded ground wire. Always use
gradual bends in the wire (no sharp
angles).
stranded ground wire. Always use
gradual bends in the wire (no sharp
angles).
4. Set DIP Switch S3 for the proper shelf
identity per the following instructions:
DIP Switch S3 is used to associate the fan shelf to the corresponding transceiver shelf. The DIP switch
settings are described in Table 4-2. Section S3-3 is the Least Significant Bit (LSB) and S3-4 is the Most
Significant Bit (MSB). Fan shelves 1 through 4 are assigned Logic 0 through 3, respectively.
settings are described in Table 4-2. Section S3-3 is the Least Significant Bit (LSB) and S3-4 is the Most
Significant Bit (MSB). Fan shelves 1 through 4 are assigned Logic 0 through 3, respectively.