Table of Contents
Advertisement
385700-4006-006
2.5 PREPARATION FOR USE
2.5.1 Distribution Line Amplifier Setup
A Distribution Line Amplifier is part of a wayside antenna system; a RADIAX
distribution system. The amplifier provides signal gain to offset the signal loss of the system.
The signal loss is based on the length and type of cable used. The Distribution Line Amplifier
includes gain adjustments for both channels as well as adjustable thresholds for the status
signals.
Channel 1, whose center frequency is 2416.64 MHz, is referred to as the Power Amplifier (PA)
or downlink channel. Refer Figure 1-3 DLA Internal View for the location of the PA module
(part number 385700-2012). The output of this channel is a nominal +30 dBm for a two port
DLA. The output of a 4 port DLA is a nominal +27 dBm per PA output port. For the downlink
channel, the signal input level as well as the output level are monitored. R
adjustment points on the PA module. See Figure 2-7 PA Module Outline for more details.
Channel 2, whose center frequency is 2467.84 MHz, is referred to as the Low Noise Amplifier
(LNA) or uplink channel. Refer to Figure 1-3 DLA Internal View, for for the location of the LNA
module (part number 385700-2011). A pilot tone module within the Distribution Line Amplifier
serves as a constant input signal for the LNA channel. The output level of the pilot tone is
monitored within the LNA module. No user adjustment of this signal is required. Because of
the diplexers within the DLA the pilot tone may not be observable at the external DLA coaxial
connectors. The input signal range of the LNA channel is approximately -30 dBm to < -100
dBm. R
and R
are adjustment points on the LNA module. See Figure 2-8 LNA Module
1
2
Outline for more details.
A configuration sheet is included with the DLA that specifies the adjustable settings at the time
of shipping the equipment.
The direction of the DLA must be set by the user for proper operation. The amplifier direction
status is indeterminate after powering up the unit. This manual assumes that either the user's
system control interface is available or a test box similar to an example given at the end of this
manual is used.
Document use is restricted to that described on cover
CAUTION
Before applying power to the Distribution
Line Amplifier, securely connect the RF
ports to 50-ohm terminations. Failure to
observe these cautions can damage the
equipment.
INSTALLATION
based signal
, R
, and R
are
1
2
3
2-8
Advertisement
Table of Contents
