Powerwave Technologies MCPS2135 MultiCarrier Amplifier System User Manual 1 1

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User Manual

SPECTRIAN

MCPS2135 SERIES

MCPA

MultiCarrier Amplifier Systems

INSTALLATION & OPERATION

MANUAL

July 2001

IntroductionPlanning and PreparationIntroduction

ii MCPS2135 Operations Manual

2001 Spectrian Corporation. This document contains

proprietary information of Spectrian Corporation . No part of this

manual may be copied or disclosed without written authorization

IntroductionPlanning and PreparationIntroduction

MCPS2135 System Operation iii

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

IntroductionPlanning and PreparationIntroduction

iv MCPS2135 Operations Manual

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

IntroductionIntroduction

MCPS2135 Operations Manual 1

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 describes 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.

Section 3, Installation Instructions, describes how to properly install the

MCPS2135 amplifier 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.

IntroductionPlanning and PreparationIntroduction

2 MCPS2135 Operations Manual

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, ultra-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.

IntroductionPlanning and PreparationIntroduction

MCPS2135 System Operation 3

Modulation Formats

The MCPS2135 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 set-

up. 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 turn-

around time.

IntroductionPlanning and PreparationIntroduction

4 MCPS2135 Operations Manual

1.1.11.3.1 MCPA Module 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 feed-

forward 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.

Figure 1: RF Module Functional Block Diagram

1.1.1.11.3.1.1 Main Loop

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.

Main

Vector Mod

Driver

Amp

Main

Amp Delay Filter

Output Module

Pilot

Generator /

Reciever

Cancellation

Controller

Carrier

Cancellation Error

Vector Mod

Preamplifier

Delay

Line

Error

Amp

RF Input

RF Output

IntroductionPlanning and PreparationIntroduction

MCPS2135 System Operation 5

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.

Figure 2 System Block Diagram

The standard MCPS2135 configurations are summarized in Table 1. Please

consult the factory or Spectrian sales for configurations not listed here.

÷÷

135 W MCPA

Modules

Alarm Management

Module

Splitter

Basestation Interface

RS-422 or RS-485

ΣΣ

Combiner

Input RF

Output

Status Port

RS-232

IntroductionPlanning and PreparationIntroduction

6 MCPS2135 Operations Manual

Power Dimensions

(W x D x H)

Comments

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

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.

Planning and PreparationPlanning and PreparationIntroduction

MCPS2135 System Operation 7

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 covering 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

Planning and PreparationPlanning and PreparationIntroduction

8 MCPS2135 Operations Manual

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.

Planning and PreparationPlanning and PreparationIntroduction

MCPS2135 System Operation 9

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 RF Output

Power I(Max),

27 VDC Recommended Service

1 135W 55 Amps 2 wires (2/module), #6AWG, #10 lugs

1 ea. 60A Circuit Breaker

2 250W 110 Amps 4 wires (2/module), #6AWG, #10 lugs

2 ea. 60A Circuit Breaker

3 370W 165 Amps 6 wires (2/module), #6AWG, #10 lugs

3 ea. 60A Circuit Breaker

4 500W 220 Amps 8 wires (2/module), #6AWG, #10 lugs

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 options for the MCPS2135 are listed in Appendix A3.

Planning and PreparationPlanning and PreparationIntroduction

10 MCPS2135 Operations Manual

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.

Planning and PreparationPlanning and PreparationIntroduction

MCPS2135 System Operation 11

RF Drive Power Worksheet

A) Total output power (POUT) required = W dBm

B) Determine total output required for each fully loaded

CDMA Frequency Assignment (FA):

# of FA’s =

total power per FA =

total CDMA power (PCDMA) =

Total available analog power (PAN ) =

= P

OUT

– P

CDMA

) W

D) Total # of analog channels, including setup (#ch) =

E) Maximum per channel analog output power (PAN/ch) =

/ch = P

/# of channels) W dBm

F) System Gain (Gain) * = dB

G) Maximum composite input power (PIN) =

= P

OUT

in dBm – Gain in dB) dBm

H) Maximum per channel analog input power (PIN/ch ) =

/ch in dBm = P

/ch in dBm – Gain in dB) dBm

* NOTE: Depends on configuration which is factory settable from 30 dB to 60 dB. On single

module systems, the gain may be adjusted by the end user with Spectrian’s Graphical User

Interface software. Consult with factory or Spectrian Sales for more information.

1.1.12.3.1 Set RF input drive power for each channel

∗ Caution: If the RF Input Cable is connected to the MCPS2135, disconnect it

from the MCPS2135. Connect the RF input cable to the Power Meter for the

following step.

∗ Caution: Make sure that the power to be measured with the meter does not

exceed the manufacturers recommended maximum input level.

Switch on the RF input drive power at the customer provided host system exciter

following the instructions supplied with your RF source equipment.

Set and verify the RF input drive level for each individual channel

1. Key-on each RF input channel individually.

2. Monitor the RF input using a HP436A or equivalent power meter.

3. Verify that the maximum input power for the channel does not exceed the

calculated levels on the RF Drive Power worksheet (line H).

4. Key off the channel and repeat for the remaining channels. Continue to

verify the required channel input power is not exceeded.

Planning and PreparationPlanning and PreparationIntroduction

12 MCPS2135 Operations Manual

After verifying the power of each individual channel individually, ensure that the

total average input power remains less than or equal to the maximum rated

composite power calculated in (G) of the worksheet.

1. Key-on all channels at one time, including any CDMA F.A.s, and

measure input power.

2. If the average composite input power exceeds the calculated average

composite input power (line H), readjust all channels as necessary to

ensure average input power remains less than or equal to specifications.

Turn off all channels. The drive power is now set properly.

1.42.4 Prepare for Installation

Before beginning the installation, verify that all the necessary site and radio

information, installation materials, tools, and MCPS2135 equipment are on hand.

Correct any problems or omissions before continuing. Refer to the following

Receiving and Unpacking Procedure to prepare the MCPS2135 equipment.

1.1.12.4.1 Inventory Received Equipment

1. Upon receipt of the MCPS2135, remove the packing lists, installation kit, and

other documents attached to the shipping container.

2. Examine shipping documents to make certain that they agree with your copy

of the order. If there is a discrepancy between the order and the items or

quantity shipped, contact your Spectrian Customer Service representative

listed in Appendix A1 of this manual.

3. Check the packing list and verify that all necessary equipment has been

delivered, and that the parts are undamaged. If any evidence of shipping

damage is noted, notify the delivery agency before continuing.

∗ Caution: If the container or contents appear to be damaged, you must contact

the carrier without delay and file a damage claim. If shipping damage occurred,

the carrier may wish to have a claims agent present when the MCPS2135 is

unpacked and inspected. To protect your warranty rights, you must also notify

your Spectrian representative and advise that the MCPS2135 was damaged

during shipment.

2.4.2 Unpack Received Equipment

Uncrating, inspecting, and preparing the MCPS2135 for site installation will

require some tools and materials not included in the shipment. Use of the

following materials is suggested to perform these tasks.

. Note: Assemble all tools, materials, and safety equipment before beginning

work.

Safety Equipment

• Safety glasses

Planning and PreparationPlanning and PreparationIntroduction

MCPS2135 System Operation 13

• Work gloves

• Steel-toe shoes

• Back-support belt

Tools

• Box knife

• Pair of large scis sors

• Inspection flashlight or lamp

• Pen or pencil

• Strap cutter

• Straight-blade screwdriver

Other Materials

• A copy of the Purchase Order

• A copy of the Packing List

Unpack equipment

1. Open the shipping container(s) and inspect the contents. Using the required

safety equipment and tools, carefully cut the metal and/or nylon straps that

surround the shipping containers. When using a box knife or scissors, take

care not to damage the contents of the box. Take care to avoid scratching the

cabinet finish.

2. Do not remove the ESD protective wrapping that surrounds the cabinet, unless

wearing an ESD protective wrist strap. If possible, remove this material by

unwrapping the MCPS2135 by hand, rather than cutting this material with

scissors or knives. Spectrian recommends not removing the protective

wrapping until installation.

3. Remove spacers, packing inserts, protective coverings, plastic bags, and other

shipping materials from the outside of the MCPS2135. Avoid using knives or

scissors to perform this task.

4. Carefully collect and dispose of the packing materials. Many of the packing

materials used by Spectrian are suitable for recycling and need not contribute

to landfills.

5. While inspecting the unpacked MCPS2135, compare the quantity and labeling

of each module with shipping documents and the purchase order. If there is

an unresolved discrepancy between the order and the items received, contact

your Spectrian representative.

6. Inspect the MCPS2135 exterior for evidence of shipping damage. Metal

surfaces should not be dented or scratched. Panels, handles, screws, and

indicators should appear undamaged and properly aligned. Connectors should

be tightly affixed to the cabinet, with no visible dents or distortion.

. Note: If you discover damage during inspection, contact the shipper and

Spectrian at once. The shipper will furnish instructions on how to document the

discovered damage. Spectrian will arrange to promptly ship replacement parts.

Planning and PreparationPlanning and PreparationIntroduction

14 MCPS2135 Operations Manual

2.4.3 Repackaging for Return Shipment

If it is necessary to repackage the MCPS2135 for return shipment, contact

Spectrian Customer Service for detailed instructions. If possible, use the

original cartons and inserts to package equipment for return. Otherwise, use

suitable shipping cartons and foam inserts to prevent damage in transit.

MCPS2135 InstallationPlanning and PreparationIntroduction

MCPS2135 System Operation 15

3 MCPS2135 Installation

3.1 Introduction

The following section describes how to install the MCPS2135 series amplifier in a

base station.

Each MCPS2135 system features rear-access RF input and output connectors, a

DC voltage input receptacle, and a front-access RS-232 status interface connector.

Additional optional features include a rear-access RS-422 serial interface

connector and a remote alarms interface connector. Specific connector pinout

information for your MCPS2135 configuration is provided in Appendix A3.

Please read and understand the instructions and warnings in this section and at the

beginning of this manual before handling or unpacking the MCPS2135 modules.

The MCPS2135 is designed to be installed by trained and qualified technicians.

+ Warning: Each MCPS2135 amplifier module and the shelf subassembly weigh

50 lbs (22.7 kgs); when crated for shipping an MCPS2135 system can weigh in

excess of 290 lbs (131.5 kgs) and be unbalanced. To avoid injuries or damage,

use care and obtain assistance when lifting a crate containing MCPS2135

components.

∗ Caution: Do not attempt to move an MCPS system with modules installed.

∗ Caution: Provide bottom support when removing an MCPA module to avoid

damage to the fan housing.

. 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.

1.23.2 Task safety equipment, tools and materials

The following safety equipment, tools, and materials are recommended to perform

the installation tasks in this section.

Safety Equipment

• Safety glasses

• Work gloves

• Back-support belt

Tools

• Heat Gun (Master 10008 – MAS or equivalent)

MCPS2135 InstallationPlanning and PreparationIntroduction

16 MCPS2135 Operations Manual

• Cable Cutter (Klein 63050)

• Flat and Phillips screwdrivers

• Adjustable wrench

• ESD protective wrist strap

• Inspection lamp or flashlight

• Crimping tool (T & B TBMS or equivalent)

• Digital Volt Meter (DVM)

• Torque Driver (Mountz TLS1360 or equivalent)

• Current Meter

• Wire Strippers (Greenlee 45109 or equivalent)

Materials

• Pressurized can of spray-on contact cleaner

• Rack-mounting hardware and fasteners

• DC Power, RF, and signal cables

• Crimp -on circular lugs

• 8 AWG insulated (green) copper ground wire

• Shrink Tubing

3.3 Rack Installation

The MCPS2135 series amplifiers mount in the equipment rack using rack-

mounted side support rails .

The MCPS2135 shelf subassemblies are labeled with the part and serial numbers,

using standard EIA part identification, date code, and serializing methods. It is

also labeled with the appropriate FCC approvals.

All MCPS2135 shelf subassemblies contain all internal wiring for DC power and

RF signal distribution to the RF modules and the interfaces to the cell site.

Brushless DC cooling fans are mounted on each RF module; cooling air is drawn

through grille openings in the front of each module and discharged through the

rear.

+ Warning: The MCPS2135 shelf sub-assembly weighs approximately 50 lbs

(22.7 kg). Use caution when lifting; obtain assistance if necessary.

3.3.1 Install Shelf Subassembly

1. Make certain that adequate vertical space within the rack enclosure is

available. Verify that there will be at least 4 inches (10cm) of space

behind the unit when installed for cooling air flow.

2. Put on an ESD protective wrist strap, and properly ground it.

3. Unpack the MCPS2135 side mounting rails and attachment hardware and

install them in the rack as shown on the accompanying job sheet.

MCPS2135 InstallationPlanning and PreparationIntroduction

MCPS2135 System Operation 17

4. Unpack the MCPS2135 shelf and record its serial number. Ensure the

shelf is in the proper upright vertical orientation and slide it onto the

mounting rails.

5. Use the supplied mounting screws to attach the shelf to the rack. Tighten

rack mounting screws securely.

3.3.2 Install Modules in Shelf

1. Unpack each RF module. Align each module with the guides in an

amplifier slot and slide the module as far as possible into the shelf,

making sure the module is fully seated. Note that each module weighs

approximately 50 lbs (22.7 kg); get a helper to assist if necessary.

Tighten the fasteners at the bottom of each faceplate to lock the modules

in place.

2. Unpack and install the Amplifier Management Module (AMM) module

in the rightmost slot of the shelf. Tighten the fastener at the bottom of the

faceplate to lock the module in place.

3. Inspect the alignment of the finished installation, and adjust if needed. If

no problems are found, rack installation is complete.

3.4 Cable and Wire Connections

3.4.1 Connect Chassis Ground Wire

1. Locate the chassis ground stud on the rear of the MCPS2135 for ground

wire attachment.

2. Measure the distance and routing between the MCPS2135 ground stud

and an attachment point to earth ground. Cut a length of #8 AWG

insulated (green) solid copper wire sufficient for the connection.

3. Crimp a ¼” circular lug to one end of the ground wire.

4. Remove the nut and lock washer on the MCPS2135 ground stud. Attach

the DC ground wire lug to the grounding stud on the MCPS2135, and

replace the lock washer and nut. Tighten the nut securely.

5. Connect the other end of the ground wire to the appropriate earth ground.

6. Use a DVM to verify that the resistance between the chassis ground and

true earth ground is less than 100 Ohms.

7. Inspect the finished connection. If no problems are discovered, ground

wire installation is complete.

3.4.2 Connect DC Input Power Cables

The MCPS2135 power connection can be made using a pair of wires for each RF

module, or via a single bussed connection. The DC input voltage cabling must be

terminated by crimped lugs and sized to the correct wire gauge to accommodate

the wire length and the DC current requirements of the MCPS2135 in accordance

MCPS2135 InstallationPlanning and PreparationIntroduction

18 MCPS2135 Operations Manual

with local building codes and industry practice. Refer to Table 2 for the

recommended power supply circuit and wire sizing for each option.

+ WARNING: Do not perform DC lead installation with energized leads. Ensure

that the DC power supply is OFF for all installation activities!

1. Locate the positive and negative terminals on the customer-provided DC

power source, and verify polarity with a DVM.

2. Locate the power supply lugs at the top of the rear of the shelf

subassembly. The four #10 lugs are for the per-RF-Module connection

option, the single pair of ¼” lugs are for the bussed power option.

Determine which set of lugs will be used for this installation.

3. Measure the distance and routing between the power source and the

MCPS2135 DC lugs.

4. For each power connection being made, cut equal lengths of wire for

power and return. Strip and connect each wire to the appropriate power

connection, using the crimping tool and the supplied ground lug.

∗ Caution: Verify the polarity of each supply wire prior to connecting them to the

shelf subassembly. A reversed-polarity connection will severely damage the

MCPS2135 and will void the product warranty.

5. Crimp the appropriate terminal lugs onto each power supply wire.

6. Attach one positive supply wire and one return wire to each of the four

sets the power supply lugs at the top of the rear of the shelf subassembly.

Tighten the attachment nuts firmly.

7. Inspect the finished connection. If no problems exist, the DC input power

cable installation is complete.

3.4.3 Connect RF Output and Input Cables

The MCPS2135 has one female type-N amplified RF output for connection to a

customer-supplied coaxial cable terminated with a male connector, and one female

SMA RF input for connection to an customer-supplied input cable terminated with

a male SMA connector.

+ WARNING: Do not perform RF cable installation with DC power applied to the

MCPS2135. Ensure that the input DC power supply is OFF before handling RF

cables.

∗ Caution: The Output cable must be connected before connecting the Input

cable.

. Note: The integrity of RF cabling is critical to the electrical performance of the

MCPS2135. Ensure connectors are properly assembled, are free of debris, and

are clean.

1. Locate the male N-type RF output connector on the end of the coaxial

cable attached to the output load. Inspect the connector and clean if

necessary; fix any problems with the cable or connector before

proceeding.

MCPS2135 InstallationPlanning and PreparationIntroduction

MCPS2135 System Operation 19

2. Locate the female N-type RF connector labeled “RF OUTPUT” on the

MCPS2135.

3. Screw the male cable connector firmly onto the female RF output

connector of the MCPS2135.

4. Locate the male input RF connector on the end of the coaxial cable from

the RF signal source. Inspect the connector for damage or irregularity,

and fix any problems with the cable or connector before proceeding.

5. Locate the female SMA connector labeled “RF INPUT” on the rear of the

MCPS2135.

6. Screw the male cable connector firmly onto the MCPS2135 female

connector.

3.4.4 Connect Alarm Interface Cables

1. The MCPS2135 provides optional factory-configured connections for dry

contact, TTL, or RS-422 communications and alarm output to the

customer system. Refer to the connector pin-out and descriptions in

Appendix A3for the connections applicable to your MCPS2135.

2. Locate the interface connectors located on the rear of the shelf

subassembly behind the Amplifier Management Module (AMM). Inspect

the connector and clean if necessary; correct any problems with the cable

or connector before proceeding.

3. Connect the male connector or input wires to the connector mounted on

the MCPS2135. Tighten the two screws on the cable connector (if any)

firmly.

3.5 Completing the Installation

3.5.1 Set the MCPS2135 unit address

Each MCPS2135 may be configured with a unique address (0 – 7) for commands

and status reports sent through the RS-422 port.

If this option is included in the MCPS2135, locate the rotary switch on the rear of

the MCPS2135 Amplifier Management Module. Set the switch to the desired

address.

1.1.23.5.2 Verify Installation

Recheck all physical and electrical connections to the MCPS2135 and remedy any

problems discovered.

Once the installation is verified, the MCPS2135 is ready to be set up and placed in

service, as described in the next section.

System Start-UpPlanning and PreparationIntroduction

20 MCPS2135 Operations Manual

4 System Start-Up

4.1 Introduction

This section contains instructions on powering up the MCPS2135 amplifier

system. These procedures should be followed after installing the MCPS2135

amplifier system in the rack.

1.24.2 Safety Information and Tools

To avoid injury, installers, technicians, and maintenance personnel must follow

Spectrian's recommended procedures and observe safety precautions.

+ Warning: The MCPS2135 should only be operated by trained and qualified

personnel. Always follow safety warnings.

+ Warning: 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. Do not operate exposed

circuitry or radiating elements with personnel in close proximity to the radiating

source. Always replace covers and shields during operation.

. Note: Before shipment, the MCPS2135 was inspected and found free of

mechanical and electrical defects. The electrical performance of the MCPS2135

should be verified using these procedures. If there is any deficiency, or if

electrical performance is not within specifications, notify your Spectrian

representative immediately.

Tools

The following tools are recommended to perform installation tasks.

• HP 436 Power meter

• Digital Volt Meter (DVM)

4.3 Verify system installation

Before operating the MCPS2135, verify proper installation as described in the

previous section.

1. Verify that there are no obstructions to airflow in the front or rear of the

MCPS2135.

2. Ensure that the DC power supply at the site is functioning normally. DO

NOT turn on the DC supply to the MCPS2135 at this time.

3. Ensure that the MCPS2135 is physically connected to an input RF signal

source and terminated in an output load. Ensure that the RF signal level has

been set properly. DO NOT turn on the RF signal source at this time.

System Start-UpPlanning and PreparationIntroduction

MCPS2135 System Operation 21

4. If used, verify that the MCPS2135 address is set correctly.

+ WARNING: The RF output of the MCPS2135 should be connected to a 50-ohm

load before DC power is turned on. The load must be capable of dissipating at

least 500 watts average power and 6,300 watts of peak power.

After mechanical and electrical installation tasks are complete, the MCPS2135 is

ready for power-on check.

1.44.4 Power Up the MCPS2135

∗ Caution: Read and understand all of the following steps before taking any

action.

. Note: The MCPS2135 should be powered on and enabled before the RF input

power is applied.

1. Switch on the DC input power to the MCPS2135. Measure the input

voltage at the bus bar connections at the rear of the unit and verify it is

27VDC. Adjust the power supply if necessary.

Following the power-up self-test, the MCPS2135 AMM POWER LED

should be GREEN, indicating that the unit is functional and that in input

voltage is between 24 and 28 VDC. If the POWER LED is amber, red, or

does not light, turn off the DC input power and correct the power supply

fault.

The ENABLE switch should be “ON”. The MCPS2135 RF modules will

automatically be ENABLED. All four LEDs on each MCPA module

should be GREEN.

To DISABLE an RF module, set the front panel ENABLE/DISABLE

switch to DISABLE; the ENABLE LED will then be RED.

2. Wait 5 minutes for the MCPS2135 to reach a stable operating temperature

and to charge the real-time clock backup power. DO NOT apply

commercial traffic signal power during this time.

3. If the MCPS2135 is connected to a remote operations center via one of

the rear panel interface connections, verify no alarms have been reported.

4. Verify that all MCPS2135 status LED indicators remain GREEN.

5. If any LED indicators are AMBER or RED, then RF modules are

disabled or there is a problem which must be remedied before continuing.

Refer to section 6, Troubleshooting.

∗ Caution: Before applying RF input power to the MCPS2135, verify that the

applied RF input power for a single channel and the sum of all channels is

below the calculated maximum rated RF input.

MCPS2135 System MonitoringPlanning and PreparationIntroduction

22 MCPS2135 Operations Manual

5 MCPS2135 System Monitoring

5.1 Introduction

This section describes methods for monitoring the MCPS2135 amplifier system

operation.

1.25.2 Monitoring the MCPS2135 System Operation

The MCPS2135 Amplifier Management Module (AMM) has a front panel RS-232

status port. This port provides the option to monitor the operation and status of the

MCPS2135 using a laptop computer, if desired.

A LabView-based Graphical User Interface (GUI), which can run on

Windows95, 98, or NT4.0-based laptop computers is available from Spectrian.

1.35.3 Alarm Definitions

Fault management may be accomplished by various means with the MCPS2135.

The MCPS2135 includes alarm LEDs, an RS-232 diagnostics port, and an optional

base station status/alarm interface. These LEDs may be used for visual

diagnostics by on-site technicians. Refer to Section 5 for details on the

MCPS2135 alarm and protection circuits.

1.1.15.3.1 Alarm classification

The MCPS2135 fault management subsystem classifies faults into three

categories. In order of escalation, these are minor faults, major faults, and critical

faults.

1.1.1.15.3.1.1 Minor Alarm

A minor problem exists, but the fault does not require a module to be taken out of

service.

Routine service attention is recommended.

1.1.1.25.3.1.2 Major Alarm

A major problem exists such that the MCPS2135 is not meeting all performance

specifications, but the unit is not automatically disabled.

Urgent service attention is required or the unit may take itself out of service.

MCPS2135 System MonitoringPlanning and PreparationIntroduction

MCPS2135 System Operation 23

1.1.1.35.3.1.3 Critical Alarm

A major failure or a condition exists that could result in damage. The MCPS2135

is automatically taken out of service.

Immediate service attention is required.

1.1.25.3.2 Alarm Responses

The fault management system automatically responds when a fault is detected.

Responses vary in impact from alarm notification with no subsequent action (for

minor faults) to alarm notification and shut-down (for critical faults). The

hierarchy of responses is designed to keep the MCPS2135 in operation unless

continued operation would result in damage to the unit. Under some fault

conditions, the MCPS2135 continues to operate in a degraded state. The operator

may choose to continue to operate in a degraded state, shed channels, or shut down

the MCPS2135 until repairs can be completed.

1.1.1.15.3.2.1 Automatic Alarm resets

Critical Alarm

When a critical alarm occurs, the MCPS2135 will automatically be DISABLED

(i.e., taken out of service) until the operator re-ENABLES the unit.

Major Alarm

When a major fault is detected, the MCPS2135 attempts to clear the fault by

performing a reset. In most cases, the MCPS2135 will attempt to reset five times.

If the alarm condition fails to clear after five attempts, the MCPS2135 remains in

operation with the fault alarm set.

In the case of an over-temperature major alarm, the fault manager will attempt to

clear the alarm one time only by resetting. If the fault condition does not clear, the

alarm classification will escalate to critical (out-of-service), and the MCPS2135

will shut down and remain off-line until returned to service by the operator.

Alarm Transient Supression

To minimize false alarms from transient anomalies, the fault management system

is designed with built-in hysteresis and filtering. If the fault condition persists past

the filter interval, the appropriate fault alarm is set.

1.1.1.25.3.2.2 Manual Alarm resets

When a major Alarm is detected, the operator may choose from the following

options:

• Take no action and allow the MCPS2135 to operate in a degraded state until

service can be performed.

• Shed input channels to reduce the power to the MCPS2135.

• Disable the RF Module using the front panel switch, diagnostic port, or

optional base station alarm and control interface

MCPS2135 System MonitoringPlanning and PreparationIntroduction

24 MCPS2135 Operations Manual

1.45.4 MCPS2135 Alarm Limits and Protection Circuits

The MCPS2135 series of multicarrier power amplifiers has a wide range of alarm

configurations available. These may be specified to meet the demands of specific

applications. In addition, the MCPA modules have built-in protection circuits to

prevent damage from unintentional misuse. Module alarms may be summarized

and reported to a BTS using a customized interface. This hierarchical system

insures that Spectrian’s MCPS2135 series amplifier systems remain robust with a

minimum of false alarms, but promptly report any real issues to the base station

controller.

The default alarm limit settings and analog protection circuit operation for the

MCPS2135 family of MCPA amplifier systems are summarized below. The

information contained herein is provided for reference only. Guaranteed

specification limits must be negotiated between prospective customers and

Spectrian. There are three levels of the alarm/protection hierarchy:

• Analog Protection Circuits – Configured in hardware design to protect the

MCPA.

• MCPA Module Alarms – Most are software configurable for specific

applications.

• Amplifier System Alarms – Summarizes MCPA and Alarm Management

Module status.

In general, analog protection circuit limits are set by design, and may not be

changed. MCPA alarm limits are software configurable, and may be tailored to

meet customer alarm specifications. Individual MCPA alarms are not displayed

on the module front panel, but they are accessible through Spectrian’s Graphical

User Interface (GUI) software. System level alarms are summaries of the module

alarm status (minor/major/critical), as well as the Amplifier Management Module

(AMM) and the communication link between the modules and the AMM. The

summary set-up is configurable using the amplifier GUI software.

1.1.15.4.1 MCPA Module Analog Protection Circuits

The MCPS2135 MCPA module design incorporates circuits to prevent MCPA

module damage by common misuse conditions. The circuits react automatically to

the conditions shown in Table 3 with the limits set as noted. These limits are not

adjustable by software configuration.

Control Condition Speed Latch

Input Overdrive > 10 dBm @ Input (configured for 57 dB module gain) 2 msec No

Main Amp Overdrive > 4 dBm @ Vectormod Input 35 µsec No

Error Amp Overdrive > -7 dBm @ Vectormod Input 35 µsec No

Overvoltage Clamp Internal DC line is limited to 28V by linear regulation

up to 30V input 10 msec No

Circuit Breaker > 75 A current draw 25 msec Yes

Table 3: Analog Protection Circuit

MCPS2135 System MonitoringPlanning and PreparationIntroduction

MCPS2135 System Operation 25

1.1.25.4.2 MCPA Module Alarms

The set points, delay, reset points, and latching conditions of all three types of

alarms are software configurable. Some Minor alarm settings can be specified by

the customer but must be agreed upon between the customer and Spectrian prior to

installation or modification. Alarm limits for Major and Critical Alarms are fixed

and can not be modified, insuring long term reliability of the MCPA module.

Type Indicator Condition Action / Response

No Alarm LED Green Normal operation None

Minor LED Amber System functional but with degraded performance None

Major LED Red System malfunctioning but operating (degraded

performance) System Reset after Dwell

Critical LED Red Continuous operation may induce damage System Shutdown after Dwell

Table 4: Module Alarm Hierarchy

Description GUI

Mne-

monic

Minor

Alarm Set

Point

Major

Alarm Set

Point

Critical Alarm

(Module

Shutdown)

Critical

Alarm

Dwell

Time

Critical

Alarm

Latch

Hyst-

eresis

Reset

Point

Inlet Temperature TMP > 50 °C > 70 °C > 70 °C 10 min. No 50 °C

Main Amp Base

Temp TMP N/A > 90 °C > 90 °C, >120 °C,

no dwell 10 min. No 70 °C

Error Amp Base

Temp TMP N/A > 90 °C > 90 °C, >120 °C,

no dwell 10 min. No 70 °C

PCM Base Temp TMP N/A > 90 °C > 90 °C, > 120 °C,

no dwell 10 min. No 70 °C

Over/Under Voltage OVS/

UVS 22 to 24V

20 to 22V or

28 to 30V <20V or >30V 5 sec No 24V or

28V

IM Degradation LOP Loop 2

SNR < 0 dB VMOD at

rail N/A N/A No N/A

Load VSWR VSR >4:1 >10:1 N/A N/A No N/A

RF Overdrive OPR >150W >170W >170W 2 sec Yes 150W

Fan Failure FAN Low RPM

(≤50%

rated)

1 Fan

Failed 2 Fans Failed None No N/A

+8V DC-DC

Converter OVS/

UVS N/A <7V, >9V <7V, >9V 2 sec Yes N/A

+16V DC-DC

Converter OVS/

UVS N/A <14V, >18V <14V, >18V 2 sec. Yes N/A

-16V DC-DC

Converter OVS/

UVS N/A -18V, >-14V

-18V, >-14V 2 sec. Yes N/A

Input Current CKT N/A >60A >60A No Delay After 3

Failures N/A

BPM Power Cell

Failure STK 1 Power

Cell Failure 2 Power

Cell Failure > 2 Power Cell

Failure No Delay Yes N/A

Gain Drop GAN N/A < -3 dB N/A 2 sec. No < -1 dB

Table 5: Default Alarm Descriptions and Settings

MCPS2135 System MonitoringPlanning and PreparationIntroduction

26 MCPS2135 Operations Manual

1.1.35.4.3 MCPA System Alarms

A multimodule MCPA system will have an Amplifier Management Module

(AMM) that summarizes the status of all modules and reports this information to

the base transceiver station (BTS). The format of this information is usually

customized for specific customers. Options for physical layer customization

include:

• Parallel TTL Interface – Summary bits for individual module status.

• Serial Interface (RS-232, RS-422) – Customized strings sent to BTS interface.

• Form-C Relay Contacts – Wired directly into BTS.

Messaging layer customization is usually specified by the customer. In addition

Spectrian does maintain an internal standard for serial messaging. System status is

generally a combination of the module status. This is also specified by the

customer. An example of a system alarm hierarchy might be as noted in the table

below.

MCPA Alarm

Condition Amplifier System Status Summary Logic

Minor At least one module reporting a minor alarm OR

Major At least one module reporting a major alarm OR

Critical At least 3 modules reporting a critical alarm AND

Table 6: Typical MCPS System Alarm Hierarchy

Troubleshooting and MaintenancePlanning and PreparationIntroduction

MCPS2135 System Operation 27

6 Troubleshooting and

Maintenance

6.1 Introduction

The following chapter provides basic information about diagnosis of problems

with the MCPS2135. Please read the following safety information prior to

beginning diagnosis and repair actions.

+ Warning: Troubleshooting and repairs should be performed only by trained and

qualified personnel or at authorized Spectrian repair depots. Observe all safety

warnings and use the required safety equipment when performing the tasks

described in this chapter.

. Note: Before shipment, theMCPS2135 was inspected and found free of

mechanical and electrical defects. The electrical performance of theMCPS2135

should be verified using these procedures. If there is any deficiency, or if

electrical performance is not within specifications, notify your Spectrian

representative immediately.

Tools

The following tools are recommended to perform system service tasks.

• HP 436 Power Meter

• Digital Volt Meter (DVM)

6.1.1 Safety Information

To avoid injury, installers, technicians, and maintenance personnel must follow

Spectrian's recommended procedures and observe all safety precautions.

+ Warning: The MCPS2135 transmits high power at radio frequencies. Severe

radiation burns can occur if recommended safety precautions are not strictly

observed.

+ Warning: 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. Do not operate exposed

circuitry or radiating elements with personnel in close proximity to the radiating

source. Always replace covers and shields during operation.

+ Warning: Except where specifically indicated, always disconnect RF input

power and DC input power to the MCPS2135 before performing procedures that

do not require power. For those procedures that do require power, be extremely

Troubleshooting and MaintenancePlanning and PreparationIntroduction

28 MCPS2135 Operations Manual

cautious in handling test leads, tools, and equipment near live circuits. Never

reach into an enclosure for the purpose of servicing or adjusting live equipment.

6.2 Troubleshooting

Refer to section 5.3 for a definition of alarm types and the significance of those

alarm types.

1.1.16.2.1 Using LED Indicators

Each MCPS2135 RF Module is equipped with four LED indicators mounted on

the front panel. The system Alarm Management Module has two LED indictors

mounted on the front panel. These indicators provide useful status and diagnostic

information to operators and technicians.

Module

LEDs Green Amber Red

POWER Voltage OK, 26 VDC 22-24 V or 28-29V; RF

has degraded performance <22 V or >29V; RF

shuts down

ENABLED Enabled N/A Disabled

STATUS OK Minor Alarm Major or Critical

Alarm

FAN OK N/A Fan Failure

AMM LEDs Green Amber Red

DC POWER Voltage OK, 26 VDC 22-24 V or 28-29V;

system has degraded

performance

<22 V or >29V;

system shuts down

STATUS No Faults N/A System Fault Exists

1.1.26.2.2 Using the Diagnostic Port Output

Use of the Diagnostic Port is described in the release notes with the interface

software distribution.

1.1.36.2.3 Using Remote Alarm Monitoring

The MCPS2135 can include an optional alarm or control interface to base station

monitoring systems. These systems provide a serial interface to transmit status

codes to a remote host computer and receive a limited set of commands from the

host. For systems with such an interface, the interface is described in detail in the

specifications Appendix, A3.

. Note: The MCPS2135 fault management system and its associated alarms and

fault indicators operate independently of the serial interface.

Troubleshooting and MaintenancePlanning and PreparationIntroduction

MCPS2135 System Operation 29

6.3 Periodic Maintenance

6.3.1 Dust Removal

Keep the air inputs and outputs of the MCPS2135 free of dust or other material

that could block cooling airflow.

1.1.26.3.2 Visual Inspection

Periodically visually inspect the MCPS2135 to ensure that all indicators are

functioning normally and that all system interfaces are properly connected.

1.46.4 Module Replacement

The RF modules of the MCPS2135 are hot-swappable field replaceable units

which can be removed and inserted while the system is online without affecting

the operation of the other units in the system.

1.1.16.4.1 Replacing an RF Module

+ WARNING: The RF Module is very heavy, 50 lbs (22.7 kg). Get assistance if

necessary.

∗ Caution: Provide bottom support when removing an MCPA module to avoid

damage to the fan housing.

1. Disable the RF Module being replaced by switching the front panel switch to

DISABLE. The ENABLE LED will be RED.

2. Undo the RF Module front panel fastener.

3. Slide the RF Module out of the shelf subassembly.

4. Place the RF module in a safe, static-free location.

5. Set the ENABLE switch on the replacement module to the DISABLE

position.

6. Insert the replacement RF Module.

7. Fasten the RF Module front panel fastener.

8. Set the ENABLE switch on the replacement module to the ENABLE position.

9. The RF Module will automatically self-test and then ENABLE; the ENABLE

LED will then be GREEN.

6.4.2 Replacing an AMM

1. Turn off the DC power to the MCPS2135.

2. Undo the AMM front panel fasteners.

3. Slide the AMM module out of the shelf subassembly.

4. Place the AMM in a safe, static-free location.

Troubleshooting and MaintenancePlanning and PreparationIntroduction

30 MCPS2135 Operations Manual

5. Slide the new AMM into the shelf sub-assembly.

6. Fasten the AMM front panel fastener.

7. Turn on the DC power to the MCPS2135. The system will perform a power-

up self-test automatically.

8. The POWER LED will be GREEN.

6.4.3 Replacing shelf subassembly

+ Warning: Turn off the DC voltage and RF power prior to replacing an

MCPS2135.

+ Warning: Remove all DC and RF connectors prior to removing the MCPS2135

from the rack.

∗ Caution: Do not attempt to move an MCPS system with modules installed.

1. Remove the RF Modules’ front panel retaining screws.

2. Remove the RF modules from the rack.

+ WARNING: The RF Module is very heavy (50 lbs / 22.7 kg). Get assistance if

necessary.

3. Set each RF Module aside in a clean, safe place, free of electrostatic charges.

4. Remove the rack retaining screws. Grasp the front panel with both hands and

pull the MCPS2135 straight out from the rack.

5. Set the disconnected MCPS2135 aside in a clean, safe place, free of

electrostatic charges.

6. Remove the replacement MCPS2135 from its static-protective packaging.

. Note: You may wish to record the serial number on your repair record before

installing the module.

7. Follow the installation and operation instructions in Sections 3 and 4 to place

the unit back in service.

6.5 Module Service

6.5.1 Replacing MCPS2135 Fan Modules

+ WARNING: The RF Module is very heavy (50 lbs / 22.7 kg). Get assistance if

necessary.

∗ Caution: Provide bottom support when removing an MCPA module to avoid

damage to the fan housing.

1. Disable the RF module with the failed fan.

2. Remove the RF module with the failed fan from the rack.

3. Place the RF module on a clean, static-free work surface.

Troubleshooting and MaintenancePlanning and PreparationIntroduction

MCPS2135 System Operation 31

4. Remove the screws securing the fan module to the RF module.

5. Disconnect the wiring harness from the fan module.

6. Connect the harness to the new fan module.

7. Replace the fan module and replace the attachment screws.

8. Replace the RF module in the rack.

9. Enable the module. Following the automatic power-up reset sequence, the

FAN indicator LED should be GREEN.

Appendix A1 Spectrian, Inc. OfficesPlanning and PreparationIntroduction

32 MCPS2135 Operations Manual

Appendix A1 Spectrian, Inc.

Offices

Spectrian Headquarters

350 West Java Drive

Sunnyvale, Calif. 94089

Ph: 408-745-5400

Fax: 408-541-0263

Web: www.spectrian.com

Spectrian, Asia Office

4TH FL., Ensung Building,

601-18, Yoksam-Dong, Kangnam-Ku,

Seoul, 135-080, Korea

Ph: 822-545-6441

Fax: 822-545-6062

Centralized customer service:

For customer service support please direct all requests, questions, comments, and

inquires to cs@spectrian.com or mail to:

Spectrian Customer Service Department

350 West Java Drive

Sunnyvale, Calif. 94089

Ph: 800-793-7222

Fax: 408-541-0263

Technical Support Line

Ph: 408-745-5416

Appendix A2 Major Electrical SpecificationsPlanning and

PreparationIntroduction

MCPS2135 System Operation 33

Appendix A2 Major Electrical

Specifications

Major Equipment Specifications for the MCPS2135 Amplifier System

Electrical Specifications Specification @ 25ºC

Frequency Range 869 - 894 MHz

Average Power¹ into 50 Ohms 135W (51.3 dBm) to 500W (57.0 dBm)

Intermodulation Distortion (IMD) -65 dBc with AMPS and/or TDMA IS-136, or IS-

97 CDMA dual mode input sources under nominal

conditions

CDMA Adjacent Channel Power2 < -45 dBc, 750 KHz offset, 30 KHz res bandwidth

@ 881 MHz, 100W Output < -60 dBc, 1.98 MHz offset, 30 KHz res bandwidth

Receive Band Noise 60 dBc

Carrier Spacing (AMPS/TDMA) 60 KHz min., 25 MHz max.

Power Output Stability for Single Frequency ± 0.5 dB under nominal conditions

Operating Bandwidth up to 25 MHz

Gain Factory set, 30 to 60 dB, 85 dB with optional

preamp

Gain Flatness vs. Frequency ± 0.5 dB (over all temps)

Gain Variation over Temp @ Any Inband Frequency ± 1 dB

Forward Power Sample Port Coupling -50 dB typ.

Input/Output Port Return Loss -15 dB min.

Second/Third and Greater Harmonic Output -50 dBc / -70 dBc

DC Input Voltage Range 26 to 28VDC

DC Input Current @ 27VDC 135W single RF module – 55A

250W two RF modules – 110A

370W three RF modules –165A

500W four RF modules – 220A

1Power levels at the output of the system combiner will vary depending on the configuration.

2Measured at the RF module output connector and in accordance with IS-97.

Appendix A3 Major Mechanical SpecificationsPlanning and

PreparationIntroduction

34 MCPS2135 Operations Manual

Appendix A3 Major Mechanical

Specifications

Mechanical Specifications

Operating/Storage Temperatures 0ºC to 50ºC/-40ºC to 85ºC

Size, 4 module shelf (D x W x H)

(Excludes mounting ears and handles). 17.72 x 21.56 x 13.97 in. max

(450 x 547.62 x 354.84 mm max.)

Size, 1 module shelf 17.72 x 17.0 x 5.25 in. max

(Excludes mounting ears and handles). (450 x 431.72 x 133.33 mm max.)

Weight, 4 module shelf (Empty) Installed: approx. 45 lbs (20 kg)

Shipping: approx. 60 lbs max. (27 kg)

Weight, 1 module shelf (Empty) Installed: approx. 22 lbs (9 kg)

Shipping: approx. 29 lbs max. (13 kg)

Weight, 1 module Installed: approx. 50 lbs max. (22.7 kg)

Shipping: approx. 65 lbs max. (29.5 kg)

Connectors RF Input(s): SMA (F)

RF Output(s): N (F)

RF Output Sample Port: SMA (F)

DC Inputs: 10-32 and ¼-20 threaded lugs

DC Ground: ¼-20 threaded lugs

Maintenance Port: RS232

Alarms Port: RS422 (standard)

RS232 (Front panel port) pinout: Pin 1 GND

Pin 2 TX

Pin 3 RX

Pin 4 N/C

Pin 5 GND

Pin 6 N/C

Pin 7 RTS

Pin 8 CTS

Pin 9 N/C

Indicators AMM: DC On, Alarm LEDs

MCPA Modules: DC On, Enable, Alarm, Fan

LEDs

Appendix A3 Major Mechanical SpecificationsPlanning and

PreparationIntroduction

MCPS2135 System Operation 35

Mechanical Outlines

MCPS2135 500W

Appendix A3 Major Mechanical SpecificationsPlanning and

PreparationIntroduction

36 MCPS2135 Operations Manual

MCPS2135 135W Configuration

Appendix A3 Major Mechanical SpecificationsPlanning and

PreparationIntroduction

MCPS2135 System Operation 37

MCPA Module for MCPS2135 Family

Appendix A4: MCPS2135 System CheckoutPlanning and

PreparationIntroduction

38 MCPS2135 Operations Manual

Appendix A4: MCPS2135

System Checkout

MCPS System Checkout

In some cases, it may be desirable to perform a system checkout prior to

installation to insure proper operation. The following procedure is included here

only for reference. Accurate specification verification is not guaranteed when

using this procedure.

Equipment Required

• HP4432 Signal Generator

• Sorenson DHP40-250 DC Power Supply

• HP8561A Spectrum Analyzer

• HP436 Power Meter

• HP8481A Power Head

• 750W, 30 dB Attenuator

• Digital Volt Meter (DVM)

Setup Procedure

1. Connect Sorenson DHP-40-250 DC power supply to DC input as outlined

in Section 3.4.

2. Connect HP4432 CDMA Signal Generator to RF input. Set RF level to –

30 dBm. Set I/Q input to internal CDMA generator, IS-97 with EQ, 9

Walsh Codes.

3. Connect Attenuator to RF Output

4. Connect HP8481A Power Sensor to Attenuator output.

5. Connect HP8561A Spectrum Analyzer to Sample Port Output. Set

ATTEN=10 dB, RBW=30kHz, VBW=10kHz, Vid. Avg.=100,

SPAN=10MHz.

Appendix A4: MCPS2135 System CheckoutPlanning and

PreparationIntroduction

MCPS2135 System Operation 39

Performance Checkout Procedure

1. Set current limit on Sorenson power supply to appropriate level as listed

in Table 2.

2. Set DC voltage to 27 ± 1V.

3. With no RF applied, verify that idle current is approximately 13A x

number of MCPA RF modules.

4. Apply RF signal, and slowly increase power to maximum rated power as

listed in Appendix A2.

5. Verify that the total DC current is approximately that listed in Table 2.

6. Perform ACPR measurement. Verify that mask specification exceeds

specification listed in Appendix A2.

INDEXPlanning and PreparationIntroduction

40 MCPS2135 Operations Manual

7 INDEX

acoustic treatment 8

airborne dust 8

air-conditioning 8

alarm configurations 23

alarm connection 9

Alarm Definitions 21

alarm output

connection 18

alarm/protection hierarchy 23

ambient noise 8

AMM 6

installation 16

replacement 28

Amplifier Management Module 6

Amplifier Management Unit 5

Amplifier System Alarms 23

AMPS

modulation 3

AMU 5

Analog Protection Circuit

summary table 23

Analog Protection Circuits 23

average power

rated 32

Block Diagram

RF module 4

building codes 7

bussed power option

DC power 17

cabinet clearance 8

cancellation 4

Caution

definition 2

CDMA 3

CDPD 3

chassis ground 9

checking 16

connection 16

combiner

active 6

combiner losses

output 6

combustible materials

floor covering 7

composite power 11

cooling air 15

critical faults

definition 21

customer service

contact information 31

DC input voltage range 32

DC power supply

requirements 9

DC wire

connecting 17

default alarm

settings 23

degraded operation 22

derate

for altitude 8

DISABLE

RF module 20

dust

removal 28

error loop 4

error signal 4

ESD protective wrapping 13

fan

replacement 29

feed-forward 4

fire codes 7

fire-extinguishing

in site 8

floor covering 7

form C 9

frequency 32

INDEXPlanning and PreparationIntroduction

MCPS2135 System Operation 41

Graphical User Interface 3, 21, 23

ground halo

site 8

grounding system

site 8

guides

module alignment 16

hot air

exhaust 8

hot-swappable

RF modules 28

input drive level

worksheet 10

installation

verify 19

installations

intended 7

Introduction 1

IS-136 TDMA 3

IS-95 3

lighting

working area 7

lightning arrestors 8

lightning protection 8

main loop 4

major faults

definition 21

MCPS address

setting 18

Mechanical Outlines 34

minor faults

definition 21

Module Alarm Hierarchy

table 24

module alarms

summarized 23

Module Alarms 23

Module Replacement 28

multimodule MCPA 25

Note

definition 2

out of service

alarm 22

over-temperature

alarm reset 22

packing lists 12

Periodic Maintenance 28

physical layer

alarms 25

pinout

RS232 33

planning

site 7

positive supply

connecting 17

powering up 19

power-up self-test 20

problem

diagnosis 26

protection circuits

built-in 23

radio parameters 10

recommended power service 9

Replacing MCPS2135 Fan Modules 29

required current 9

return shipment 13

return wire

connecting 17

RF cabling

integrity 17

RF input drive

setting 11

RF load

test 20

RF module

disabling 20

installation 16

RF output

connecting 17

safety equipment

installation 14

self-reset

automatic 22

shipping containers

opening 13

shipping damage 12

shipping documents 12

side support rails 15

INDEXPlanning and PreparationIntroduction

42 MCPS2135 Operations Manual

smoke detectors 8

summarized

alarms 23

uncrating 12

unrestricted airflow 8

vibration 8

Warning

definition 2

weight 7

wrist strap 13, 15

Powerwave Technologies MCPS2135 MultiCarrier Amplifier System User Manual 1 1

Powerwave Technologies, Inc. MultiCarrier Amplifier System 1 1

User Manual

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