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385700-4006-006
INSTALLATION
In normal usage, the RF connections to the Distribution Line Amplifier are made with non-
®
radiating coaxial cable that is attached to the main radiating coaxial cable RADIAX
. The non-
®
radiating RF cable is type HELIAX
LDF4-50A (or equivalent) with N male type connectors.
®
In the forward configuration, connect the HELIAX
coaxial cable coming from the direction of
BDR or the preceding DLA in a cascaded configuration to the Distribution Line Amplifier at
NORM PA IN/LNA OUT (J4) port on the connector panel of the unit. Connect the HELIAX
coaxial cable coming from the direction of the succeeding DLA in a cascaded configuration at
the DLA NORM PA OUT1/LNA IN (J3) port.
See Figure 2-1
DLA Forward Direction
Interconnect Diagram for a typical 4 port configuration. For 2 port configurations, J5 and J6
®
are not connected. Refer to Andrew Catalog, -- HELIAX
Coaxial Cable – for cable and
connector information.
Connect a nominal 120 VAC power source to the DLA connector panel POWER IN (J1) port.
Refer to Figure 2-3 DLA Input VAC Pin-outs.
The ALARM/CONTROL (J2) connector is connected via cable to the USER control equipment
®
network data interface. The data interface may be represented by either LONWORKS
type
connection or by twisted pair cable connection. For the dry contacts refer to Figure 2-4 DLA
ALARM/CONTROL Port Pin-outs. The ALARM/CONTROL interface includes a signal that
controls the direction of the line amplifier. In normal usage the direction control is set to
FORWARD.
2.2.2 Reverse Direction Configuration Interconnection
In normal usage, the direction of the amplifier is reversed by controlling the amplifier from the
ALARM/CONTROL interface. The signals are connected to the line amplifier as described in
the previous section. Selecting the reverse direction reverses the direction of the signals
within the line amplifier as well as the signals that appear on J3 and J4 of the line amplifier.
2.3 CABLE AND GROUND REQUIREMENTS
The following paragraphs contain the requirements for constructing the interconnect cabling
between the DLA vendor supplied equipment.
The chassis of the DLA must be bonded to earth with 6-guage solid conductor. See Figure
1-1. Connection to the DLA is made at ground lug provided at the connector panel of the
DLA.
The RF coaxial cables that are connected to the main radiating cable under normal conditions
must support potential bends in the path from the main radiating cable to the DLA plate. Loss
through this cable must be less than 2 dB.
For the ALARM/CONTROL interface (direction and amplifier status signals), construct signal
cabling using 16 gauge shielded cabling.
All signal cables shall be shielded for EMI reduction.
Document use is restricted to that described on cover
2-2
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