Operation and Maintenance Manual

385700-4006-006 INTRODUCTION
Document use is restricted to that described on cover 1-6
1.4 LOCATIONS AND DESCRIPTIONS OF MAJOR COMPONENTS
Refer to Figure 1-1 Distribution Line Amplifier (4 port) for a view of the external connections
of the 4 port DLA. The 2 port DLA does not include J5 or J6. The mechanical outline of the
DLA is given in CHAPTER 6. The following paragraphs contain the description of the
Distribution Line Amplifier.
Figure 1-1 Distribution Line Amplifier (4 port)
1.4.1 Distribution Line Amplifier Principles of Operation
The bi-directional Distribution Line Amplifier operates within two sub-regions of the 2400 –
2483.5 MHz ISM band. It filters and amplifies at the BDR center frequency of 2416.64 MHz.
in one direction (FWD) and at the MDR center frequency of 2467.86 MHz in another direction
(RVS).
The RF signal at each amplifier is routed through a diplexer (filter) to divide the signal into two
paths: forward and reverse. The DLA has a direction control switch which changes the signal
path to the opposite direction upon the command from the user control equipment network
data interface via the alarm and control interface board. The internal status of the DLA is
monitored by the Amplifier Alarm Detectors. The status signals are sent to the USER control
equipment network data interface via the alarm and control interface.
The BDR path, also referred to as the PA channel or channel 1, contains a power amplifier.
The maximum PA output of the 4 port DLA is < +27 dBm per output port. The PA output port
of the 2 port DLA is < +30 dBm. The PA channel maintains a constant output power over a
user adjustable range. See Table 1-2 Distribution Line Amplifier Specifications for the input
range over which the output power is adjustable. The PA channel also contains an input