044-05243 Rev A
1-1
Chapter 1
Product Description
Introduction
This manual provides information and procedures for installation, operation, and maintenance of the
OS-1933-E0-003 Multi-Carrier Power Amplifier (MCPA) Outdoor Booster System.
Scope of Manual
This manual is intended for use by service technicians familiar with similar types of equipment. It contains
service information required for the equipment described and is current as of the printing date. Changes which
occur after the printing date may be incorporated by a complete manual revision or alternatively as additions.
General Description
The outdoor system (OS), shown in Figures 1-1 through 1-4, is a three-way system operating in a 6
0
MHz
transmit frequency band from 1930 to 199
0
MHz with an instantaneous bandwidth of any 60MHz within the
operating transmit band and an uplink frequency range of 1850 to 191
0
MHz.
The OS has a sturdy aluminum IP55 rated cabinet with front and rear locking hinged doors equipped with
intrusion alarms. The door latches are 1/4 turn and require a 10 mm hex socket wrench or nut driver to open
and close. The doors can be secured with a padlock with a 1/2 inch maximum shank diameter. The front and
rear doors contain removable, washable air filters.
Bolt inserts located on the cabinet side and bottom panels are for mounting the OS to a secure fixed location.
RF connections are located on the interface bulkhead plate at the bottom rear of the cabinet. External power,
communications, and alarm cables are routed through access holes located adjacent to the bulkhead. Cabinet
ground is also located next to the interface bulkhead.
The OS system provides three forms of alarm reporting; Form-C contact closure, ethernet (web page), and
wireless modem.
Major features of the OS cabinet include the following:
MCPA
The MCPA module, shown in Figure 1-5, is a 1900 MHz RF amplifier. The MCPAs operational features include
a front panel RF OFF/ON/RESET switch and a multicolored LED indicator to display system status. MCPA
faults are reported via the status alarm web page.
RF Conditioning Unit (RFCU)
The RF Conditioning Unit (RFCU) shown in Figure 1-6 combines up to four separate BTS feeds; two duplexed
and two simplexed. The RFCU combines, attenuates, and conditions the RF signals. If a critical system failure
occurs, the RFCU places the system into bypass mode. The RFCU has two Low Noise Amplifier Units with
adjustable gain, each located between the output and input duplexer on the RX path and the diversity RX path.
Performance of the RFCU is monitored and reported via the Ethernet web pages. Faults from the RFCU are
mapped to Form-C and optional wireless modem alarms.
❑
Up to three MCPAs. (one per sector, up to 160W)
❑
Three RF Conditioning Units (RFCU).
❑
One Control Module
❑
One power system containing up to four rectifier modules.
❑
Two variable-speed fan assemblies, front and rear doors.
