SPECTRIAN
MCPS2135 SERIES
MCPA
MultiCarrier Amplifier Systems
INSTALLATION & OPERATION
MANUAL
July 2001
IntroductionPlanning and PreparationIntroduction
2001 Spectrian Corporation. This document contains
proprietary information of Spectrian Corporation . No part of this
manual may be copied or disclosed without written authorization
of Spectrian Corporation. All rights reserved.
ii MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
TABLE OF CONTENTS
1 Introduction .................................................................................................................................................11
1.1 About this Manual ...............................................................................................................................11
1.2 Safety Information..............................................................................................................................22
1.3 Introduction to the MCPS2135 Family ...........................................................................................22
1.3.1 MCPA Module Functional Description .................................................................................44
1.3.2 MCPS2135 Amplifier System.................................................................................................55
2 Planning and Preparation............................................................................................................................77
2.1 Installation Planning...........................................................................................................................77
2.2 Site Planning Guide............................................................................................................................77
2.2.1 Site Considerations ....................................................................................................................77
2.2.2 Rack Installation Considerations.............................................................................................88
2.2.3 Cable Connections .....................................................................................................................99
2.3 Determine the required RF input power......................................................................................1010
2.3.1 Set RF input drive power for each channel........................................................................1111
2.4 Prepare for Installation ...................................................................................................................1212
2.4.1 Inventory Received Equipment ...........................................................................................1212
2.4.2 Unpack Received Equipment ...............................................................................................1212
2.4.3 Repackaging for Return Shipment......................................................................................1413
3 MCPS2135 Installation...........................................................................................................................1514
3.1 Introduction......................................................................................................................................1514
3.2 Task safety equipment, tools and materials ................................................................................1514
3.3 Rack Installation..............................................................................................................................1615
3.3.1 Install Shelf Subassembly.....................................................................................................1615
3.3.2 Install Modules in Shelf........................................................................................................1716
3.4 Cable and Wire Connections.........................................................................................................1716
3.4.1 Connect Chassis Ground Wire.............................................................................................1716
3.4.2 Connect DC Input Power Cables.........................................................................................1716
3.4.3 Connect RF Output and Input Cables.................................................................................1817
3.4.4 Connect Alarm Interface Cables ..........................................................................................1918
3.5 Finish Installation............................................................................................................................1918
3.5.1 Set the MCPS2135 unit address..........................................................................................1918
3.5.2 Verify Installation..................................................................................................................1918
4 System Start-Up .......................................................................................................................................2119
4.1 Introduction......................................................................................................................................2119
4.2 Safety Information and Tools........................................................................................................2119
4.3 Verify system installation..............................................................................................................2119
MCPS2135 System Operation iii
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
4.4 Power Up the MCPS2135..............................................................................................................2220
5 MCPS2135 System Monitoring............................................................................................................2321
5.1 Introduction......................................................................................................................................2321
5.2 Monitoring the MCPS2135 System Operation..........................................................................2321
5.3 Alarm Definitions............................................................................................................................2321
5.3.1 Alarm classification...............................................................................................................2321
5.3.2 Alarm Responses ....................................................................................................................2422
5.4 MCPS2135 Alarm Limits and Protection Circuits....................................................................2523
5.4.1 MCPA Module Analog Protection Circuits.......................................................................2523
5.4.2 MCPA Module Alarms .........................................................................................................2624
5.4.3 MCPA System Alarms ..........................................................................................................2725
6 Troubleshooting and Maintenance ........................................................................................................2826
6.1 Introduction......................................................................................................................................2826
6.1.1 Safety Information.................................................................................................................2826
6.2 Troubleshooting...............................................................................................................................2927
6.2.1 Using LED Indicators ............................................................................................................2927
6.2.2 Using the Diagnostic Port Output.......................................................................................2927
6.2.3 Using Remote Alarm Monitoring........................................................................................2927
6.3 Periodic Maintenance.....................................................................................................................3028
6.3.1 Dust Removal.........................................................................................................................3028
6.3.2 Visual Inspection....................................................................................................................3028
6.4 Module Replacement......................................................................................................................3028
6.4.1 Replacing an RF Module ......................................................................................................3028
6.4.2 Replacing an AMM...............................................................................................................3028
6.4.3 Replacing shelf subassembly ...............................................................................................3129
6.5 Module Service................................................................................................................................3129
6.5.1 Replacing MCPS2135 Fan Modules...................................................................................3129
Appendix A1 Spectrian, Inc. Offices ............................................................................................................3331
Appendix A2 Major Electrical Specifications.............................................................................................3432
Appendix A3 Major Mechanical Specifications.........................................................................................3533
Appendix A4: MCPS2135 System Checkout............................................................................................3937
MCPS System Checkout........................................................................................................................3937
Equipment Required ................................................................................................................................3937
Setup Procedure .......................................................................................................................................3937
Performance Checkout Procedure.........................................................................................................4038
iv MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
1 Introduction
Chapter 1 introduces the MCPS2135 Series of Multi Carrier Power Amplifier
(MCPA) Systems. It describes structure of this manual and introduces the different
MCPS2135 Series amplifiers.
1.1 About this Manual
The following manual descr ibes how to install, operate, and maintain the
MCPS2135 series of amplifiers. It is arranged into the following sections.
Section 1, Introduction, introduces the systems in the MCPS2135 family and their
main features and describes how the system documentation is organized.
Section 2, Preparation and Planning, contains information helpful for planning
the installation and assuring proper preparation for the installation.
IntroductionIntroduction
Section 3, Installation Instructions , describes how to properly install the
MCPS2135 am plifier system.
Section 4, System Start-up, has procedures for power -up and initial check out of
the MCPS2135 amplifier system.
Section 5, System Monitoring, presents information on basic and optional methods
of MCPS2135 system monitoring.
Section 6, Troubleshooting and Maintenance, describes how to diagnose faults
using the indicator LED’s and status/alarm messages. Section 6 also has
instructions for routine maintenance and for installation of new field-replaceable
modules in the MCPS2135 amplifier
Appendix A1, Spectrian, Inc. Company Offices, contains company locations and
other contact information.
Appendix A2, Electrical Specifications , details the electrical specifications met by
the MCPS2135 amplifier systems, including the Connector Pin-outs and Interface
Protocols used in the front panel diagnostic port and the optional base station
alarm and control interfaces.
Appendix A3, Mechanical Specifications , includes mechanical and environmental
specifications met by the MCPS2135 amplifier systems.
Appendix A4, MCPS2135 System Check Out, has the procedure for a quick
operational check of the MCPS2135 amplifier system.
MCPS2135 Operations Manual 1
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
Throughout this manual, notes, cautions and warnings are used with this
convention:
. Note: Suboptimal or out-of-specification performance will result from not
following the instructions presented in ‘notes’.
∗ Caution: Follow ‘caution’ notes to avoid possible damage to equipment.
+ Warning: Injury to personnel, equipment fire, or other hazardous situations
will result from not properly following ‘warning’ instructions.
1.2 Safety Information
The MCPS2135 has been designed for maximum safety and reliability when it is
installed, used, and maintained in accordance with the procedures and instructions
in this manual by trained and qualified technicians. To ensure the safe and
compliant operation of the system, always follow the safety and operational
recommendations in this manual.
+ WARNING: The MCPS2135 produces high levels of RF radiation. Severe
radiation burns can occur if recommended safety precautions are not strictly
observed.
-- Do not operate exposed circuitry or radiating elements with personnel in close
proximity to the radiating source. Always replace covers and shields during
operation.
-- Persons with cardiac pacemakers should avoid exposure to RF radiating
elements.
-- Exposing the human eye to high levels of radio-frequency radiation may
result in the formation of cataracts.
+ WARNING: Do not install or operate theMCPS2135 amplifier in the presence
of flammable gases or fumes.
+ Each RF Module and the shelf subassembly weigh 22.7 kgs (50 lbs); when
crated for shipping an MCPS2135 system can weigh in excess of 131.5 kgs (290
lbs) and be unbalanced. To avoid injuries or damage, use care and obtain
assistance when lifting MCPS2135 components.
∗ Always use the recommended safety equipment.
∗ Please read and understand all instructions and warnings before handling an
MCPS2135.
∗ MCPS2135 amplifiers may only be installed in restricted access areas (dedicated
equipment rooms, equipment closets, or the like) in accordance with Article 110-
16. 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA No. 70.
1.3 Introduction to the MCPS2135 Family
The MCPS2135 is a modular, ultr a-linear cellular-frequency amplifier system
providing up to 500 Watts (total) of output power. Designed for maximum
flexibility and reliability, the MCPS2135 can increase the range and capacity of
new or existing base stations.
2 MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
Modulation Formats
The MC PS2135 can amplify any number of signal carriers using AMPS, CDPD,
IS-136 TDMA, IS-136HS GSM, IS-136HS EDGE, or IS-95 CDMA modulation
up to the maximum rated system output power.
Modularity
The MCPS2135 family is designed for operation with 1 to 4 amplifier modules,
each providing up to 135 Watts of RF output power (exclusive of combining
losses).
Mounting Configurations
The MCPS2135 amplifier systems are available in a variety of configurations.
Mounting kits are available for installation in 19-inch, 23-inch, 600mm, 24-inch,
or 25-inch equipment racks. Multi -module shelves are 8 RU (14 in.) high. Single
module shelves are 3 RU (5.25 in.) high.
Peripheral Products
Spectrian offers optional products to assist in base station configuration and setup. Among these products are multi -port RF combiners, bandpass filters,
preamplifiers, and AC/DC power rectifiers. Please consult with the factory or
sales for more information on these peripheral products.
RF Interfaces
The Spectrian MCPS2135 has a single RF input for combined input signals, and a
single RF output to the transmit filter. There is also a single module configuration
with three input connectors combined within the amplifier and a single output
connector.
Alarms and Control
The MCPS2135 system provides visual status information through front-panel
LED indicators. Status information is also transmitted via a front-panel RS-232
port using Spectrian’s optional Graphical User Interface program.
The MCPS2135 can also be optionally equipped with additional alarm and control
interfaces, including dry-contact or TTL alarm connections RS-232 or RS-422
interfaces to network operations and administration systems.
The MCPS2135 is designed to enable system maintenance without removing the
amplifier from service. In multi -module (high power) systems, the RF modules
can be hot-swapped during operation without affecting calls in process. The
Amplifier Management Module (AMM) can be easily replaced in the field. The
amplifier modules are designed so the cooling fans can be replaced in the field by
qualified service technicians, greatly reducing service shipping costs and turnaround time.
MCPS2135 System Operation 3
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
1.1.11.3.1 MCPA Modul e Functional Description
To achieve the high level of linearity required to support multiple cellular carriers
at the minimum cost, the RF modules in the MCPS2135 use a single loop feedforward correction architecture with two amplification paths – the main path,
containing the main amplifier, and the error path, containing the error amplifier.
The combination of these two paths in a feed forward loop configuration results in
a signal in which the distortion products have been cancelled, enabling highly
linear operation of the amplifier.
Main
Preamplifier
RF Input
Delay
Line
Vector Mod
Cancellation
Controller
Σ
Carrier
Cancellation
Figure 1: RF Module Functional Block Diagram
1.1.1.11.3.1.1 Main Loop
Driver
Amp
Error
Vector Mod
Main
Amp
Output Module
Delay Filter
τ
RF Output
Pilot
Generator /
Reciever
Error
Amp
The output of the main amplifier contains both the desired signal and Inter modulation Distortion (IMD) products. This signal is coupled off and combined
with the undistorted input signal coupled off the preamplifier. The relative delay
and phases of these signals are adjusted so they combine to cancel out the desired
signal, creating an error signal composed of only the main amplifier IMD
products. The cancellation process is controlled by a Digital Signal Processor,
which insures optimum carrier cancellation over all environmental conditions.
1.1.1.21.3.1.2 Error Loop
The error signal is amplified in the error loop. The amplified error signal is then
combined with the output of the main amplifier containing both the desired signal
and distortion products such that the distortion products cancel. The error loop
provides the adjustments and controls necessary to assure that the amplitude,
phase and delay of both signals result in the desired cancellation.
4 MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
1.1.1.31.3.1.3 Amplifier Management Unit
The Amplifier Management Unit (AMU ) monitors and controls performance of
the various subassemblies within the RF module. The AMU provides operating
status information via front panel LEDs. Within a multi -module system, the AMU
provides status to the MCPS2135 AMM.
1.1.21.3.2 MCPS2135 Amplifier System
A fully-equipped MCPS2135 consists of a rack -mounted shelf containing up to
four RF modules. Multi -module systems contain an Alarm Management Module,
and an internal divider/ combiner. A block diagram of the system is shown in
Figure 2.
RF
Input
Splitter
Status Port
RS-232
Figure 2 System Block Diagram
135 W MCPA
Modules
1
2
÷÷
3
4
Alarm Management
Module
Basestation Interface
RS-422 or RS-485
Combiner
RF
Output
ΣΣ
The standard MCPS2135 configurations are summarized in Table 1. Please
consult the factory or Spectrian sales for configurations not listed here.
MCPS2135 System Operation 5
2001 Spectrian Corporation. All rights reserved.
IntroductionPlanning and PreparationIntroduction
Power Dimensions
(W x D x H)
135W 5.25” x 18” x 14” Single module with communication interface
135W 19” x 18” x 3 RU Single module configuration in 19 in. housing
135W 23” x 18” x 3 RU Single module configuration in 23 in. housing
250W to 500 W 23” x 18” x 8 RU 2 to 4 modules combined
250W to 500 W 24” x 18” x 8 RU 2 to 4 modules combined 24 inch rack config
Comments
Table 1: MCPS2135 System Configurations
MCPA modules
The RF modules are ultra-linear amplifiers optimized for high power amplification
of cellular signals. Each RF module provides up to 135 Watts of RF output power.
Multi-module systems have combiner losses which reduce the output power of
each module to approximately 125 Watts. The RF module has been discussed in
section 1.2.1
Amplifier Management Module
The Amplifier Management Module (AMM) contains the system control and
alarm management logic and the interface to external operation and control
systems.
Divider/Combiner
The divider/combiner used in multi -module systems allows the RF modules to
function as a single system. The combiner has an active architecture, which
automatically reconfigures to minimize combining losses if an RF module should
fail.
6 MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and PreparationPlanning and PreparationIntroduction
2 Planning and Preparation
2.1 Installation Planning
It is important to ensure proper planning and site preparation is complete prior to
beginning the installation of the MCPS2135. The following sections describe
installation considerations and the information required before beginning the
installation procedure. Spectrian Applications Engineering is always available to
assist with planning for the installation of the MCPS2135.
1.22.2 Site Planning Guide
For each MCPS2135 cell site installation, there must be a Site Planning or Site
Engineering guide giving the detailed information on the site considerations, rack
installation, cable connections, and Radio Parameters.
. Note: Local building and fire codes govern the manner in which some site
preparation and installation tasks are performed. Spectrian recommends that
you consult your local building inspector or a licensed engineer to ensure that
the site installation conforms to local building codes.
2.2.1 Site Considerations
Intended Installations
The MCPS2135 system is intended for installation only in restricted access areas
(dedicated equipment rooms, equipment closets, environmental shelters, or the
like) in accordance with Articles 110-16, -17, and -18 of the National Electrical
Code, ANSI/NFPA No. 70.
Weight
The MCPS2135 shelf and each RF module weigh approximately 50 pounds (22.7
kg); the fully equipped system weighs 250 pounds (113.3 kg). The system must
be installed, using the appropriate mounting kit, into a rack capable of supporting
the unit, and located on a floor or surface capable of supporting the combined
weight of the rack, the MCPS2135, and the installer or technician.
Floor Covering
If you intend to use a floor cover ing under the MCPS2135, avoid combustible
materials, industrial carpeting, and materials that will permit generation of
electrostatic charges.
Illumination
The MCPS2135 is designed to be installed and serviced under normal workroom
lighting. During installation, room lighting must be bright enough to allow
reading instructions and inspection of modules, but not so bright as to interfere
MCPS2135 System Operation 7
2001 Spectrian Corporation. All rights reserved.
Planning and PreparationPlanning and PreparationIntroduction
with viewing the status LED indicators on the front panel. The MCPS2135 should
be oriented or shielded so that direct sunlight does not fall upon the front panel.
Fire Protection
Spectrian recommends that the MCPS2135 installation site be equipped with
smoke detectors and an automatic fire-extinguishing system. In addition, for
personnel safety, the site should be equipped with a portable halon or CO2 fire
extinguisher.
Altitude
When installing the MCPS2135 above 5000 ft (1542 m), derate the maximum
operating temperature by 2° C per 1000 ft (304 m) above 5000 ft.
Ventilation
The MCPS2135 requires unrestricted airflow around the MCPS2135. The site
must be ventilated or air-conditioned so that ambient air does not exceed 50°
Celsius (122° F).
Ambient air quality
The MCPS2135 should be installed in a location that is free of airborne dust and
toxic or corrosive fumes.
Vibration and Noise
The MCPS2135 tolerates moderate levels of vibration and ambient noise . The
MCPS2135 should not be installed in a location subject to mechanical shocks or
vibrations conducted from nearby mechanical equipment. The MCPS2135
generates fan noise below 65 dBa during operation and no additional acoustic
treatment of the site is needed.
Lightning Protection
Spectrian recommends that all power, RF, and signal lines that connect to the
MCPS2135 be protected by approved lightning arrestors. Your local fire or safety
codes will determine the type of lightning protection required.
Grounding
Spectrian recommends that the MCPS2135 and entire equipment rack be grounded
with an engineered grounding system , including a ground halo and ground rods.
1.1.22.2.2 Rack Installation Considerations
Rack Space
Multi-module MCPS2135 systems require 8U of rack space in a 23” or a 24” rack.
Optional mounting hardware for other rack sizes is also available. When used, the
optional preamplifier requires an additional 2U above the shelf. Single module
shelves require 3U of rack space.
Clearance
During operation, the MCPS2135 requires front cabinet clearance for unrestricted
cooling air input, plus a minimum of 4 inches (102mm) behind the MCPS2135 to
exhaust hot air. Some additional rear clearance is desirable to accommodate routing
the RF input and output cables and the DC power cables to their connections on the
rear of the unit.
8 MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and PreparationPlanning and PreparationIntroduction
1.1.32.2.3 Cable Connections
DC Power Supply
The MCPS2135 requires customer -supplied connections to the site +27 VDC
power supply. The MCPS2135 is normally connected to the power supply with a
separate connection for each RF module; a single connection to each shelf is also
possible using the optional shelf power bus. Table 2 shows the required current
and recommended power service for MCPS2135 systems with the indicated
number of active amplifier modules installed in a system shelf.
# RF
Modules
1 135W 55 Amps 2 wires (2/module), #6AWG, #10 lugs
2 250W 110 Amps 4 wires (2/module), #6AWG, #10 lugs
3 370W 165 Amps 6 wires (2/module), #6AWG, #10 lugs
4 500W 220 Amps 8 wires (2/module), #6AWG, #10 lugs
RF Output
Power
I
,
(Max)
27 VDC
Recommended Servi ce
1 ea. 60A Circuit Breaker
2 ea. 60A Circuit Breaker
3 ea. 60A Circuit Breaker
4 ea. 60A Circuit Breaker
Table 3: Individual Power Connections to each RF Module
Single Bussed Connection
When using the bussed connection option, the service should be sized for a fully
equipped shelf. This will provide adequate service with capacity for future
expansion.
Recommended Service: 2 Wires, #2AWG, ¼”narrow tongue lug (T&B 55116 or
equivalent); 1 ea. 240A Circuit Breaker.
Chassis Ground Wire
The MCPS2135 shelf requires a customer -supplied chassis ground connection using
#8AWG with a ¼” ring lug .
RF Input and Output Cables
The MCPS2135 requires a single customer -supplied SMA male RF input cable
and a single customer -supplied male type-N RF output cable. The RF output cable
must be rated to properly handle the MCPS2135 output power. The female
connectors are on the rear of the MCPS2135 shelf. Spectrian offers optional RF
cables for use in connecting the MCPS2135 amplifier.
Alarm Interface Cables
The MCPS2135 requires customer -supplied interface cables to the system alarm
interfaces. The standard system has screw terminal connections to form C-relay
alarm contacts; optional RS 422 serial connections are also available. The alarm
connection opti ons for the MCPS2135 are listed in Appendix A3.
MCPS2135 System Operation 9
2001 Spectrian Corporation. All rights reserved.
Planning and PreparationPlanning and PreparationIntroduction
Radio Parameters
To set up the MCPS2135, the installer must know the following radio parameters
for the MCPS2135 installation.
• Total Planned Output Power
• Number of CDMA Frequency Assignments and power of each FA
• Number of AMPS/TDMA/CDPD Channels and power of each channel
• Planned System Gain
Installation Equipment
Refer to the Tools and Materials listing in the following sections for the required
MCPS2135 installation and test supplies.
1.32.3 Determine the required RF input power
Before applying RF input power to the MCPS2135, determine the input drive level
and output power needed for each channel being amplified by using the RF Drive
Power Worksheet, shown below.
Once the required RF input power for each channel is determined, continue to the
next step, setting the RF input drive power.
10 MCPS2135 Operations Manual
2001 Spectrian Corporation. All rights reserved.
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