Powerwave Technologies MCPA4080 PCS Multicarrier Ultra-Linear Power Amplifier User Manual revised

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Date Submitted	2001-12-07 00:00:00
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Document Title	revised user manual

SPECTRIAN
MCPS4080 SERIES
MCPA
MultiCarrier Amplifier Systems
INSTALLATION & OPERATION
MANUAL
December 2001
Rev 1.5
Introduction
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
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Introduction
TABLE OF CONTENTS
Introduction....................................................................................................................................1
1.1
About this Manual...................................................................................................................1
1.2
Safety Information...................................................................................................................2
1.3
Introduction to the MCPS4080 Family...................................................................................3
1.3.1
MCPA Module Functional Description ..........................................................................4
1.3.2
MCPS4080 Amplifier System.........................................................................................5
Planning and Preparation.................................................................................................................7
2.1
Installation Planning................................................................................................................7
2.2
Site Planning Guide.................................................................................................................7
2.2.1
Site Considerations..........................................................................................................7
2.2.2
Rack Installation Considerations.....................................................................................8
2.2.3
Cable Connections...........................................................................................................9
2.3
Determine the required RF input power................................................................................10
2.3.1
2.4
Prepare for Installation..........................................................................................................12
2.4.1
Inventory Received Equipment.....................................................................................12
2.4.2
Unpack Received Equipment ........................................................................................12
2.4.3
Repackaging for Return Shipment ................................................................................13
MCPS4080 Installation .................................................................................................................14
3.1
Introduction...........................................................................................................................14
3.2
Task safety equipment, tools and materials ..........................................................................14
3.3
Rack Installation....................................................................................................................15
3.3.1
Install Shelf Subassembly .............................................................................................15
3.3.2
Install Modules in Shelf ................................................................................................16
3.4
Cable and Wire Connections.................................................................................................16
3.4.1
Connect Chassis Ground Wire ......................................................................................16
3.4.2
Connect DC Input Power Cables ..................................................................................16
3.4.3
Connect RF Output and Input Cables ...........................................................................17
3.4.4
Connect Alarm Interface Cables ...................................................................................18
3.5
Set RF input drive power for each channel ...................................................................11
Finish Installation..................................................................................................................18
3.5.1
Set the MCPS4080 unit address ....................................................................................18
3.5.2
Verify Installation..........................................................................................................18
System Start-Up ............................................................................................................................19
4.1
Introduction...........................................................................................................................19
4.2
Safety Information and Tools................................................................................................19
4.3
Verify system installation......................................................................................................19
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
iii
Introduction
4.4
Power Up the MCPS4080......................................................................................................20
MCPS4080 System Monitoring.....................................................................................................21
5.1
Introduction............................................................................................................................21
5.2
Monitoring the MCPS4080 System Operation......................................................................21
5.3
Alarm Definitions ..................................................................................................................21
5.3.1
Alarm classification.......................................................................................................21
5.3.2
Alarm Responses ...........................................................................................................22
5.4
MCPS4080 Alarm Limits and Protection Circuits ................................................................23
5.4.1
MCPA Module Analog Protection Circuits...................................................................23
5.4.2
MCPA Module Alarms..................................................................................................24
5.4.3
MCPA System Alarms ..................................................................................................24
Troubleshooting and Maintenance ................................................................................................26
6.1
6.1.1
Introduction............................................................................................................................26
6.2
Safety Information.........................................................................................................26
Troubleshooting.....................................................................................................................27
6.2.1
Using LED Indicators ....................................................................................................27
6.2.2
Using the Diagnostic Port Output..................................................................................27
6.2.3
Using Remote Alarm Monitoring..................................................................................27
6.3
Periodic Maintenance ............................................................................................................28
6.3.1
Dust Removal ................................................................................................................28
6.3.2
Visual Inspection...........................................................................................................28
6.4
Module Replacement.............................................................................................................28
6.4.1
Replacing an RF Module ...............................................................................................28
6.4.2
Replacing an AMM .......................................................................................................28
6.4.3
Replacing shelf subassembly.........................................................................................29
6.5
6.5.1
Module Service......................................................................................................................29
Replacing MCPS4080 Fan Modules .............................................................................29
Appendix A1 Spectrian, Inc. Offices.....................................................................................................31
Appendix A2 Major Electrical Specifications.......................................................................................32
Appendix A3 Major Mechanical Specifications ...................................................................................33
Appendix A4: MCPS4080 System Checkout......................................................................................36
MCPS System Checkout................................................................................................................36
Equipment Required......................................................................................................................36
Setup Procedure .............................................................................................................................36
Performance Checkout Procedure .................................................................................................37
iv
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Introduction
1 Introduction
Chapter 1 introduces the MCPS4080 Series of Multi Carrier Power Amplifier
(MCPA) Systems. It describes structure of this manual and introduces the different
MCPS4080 Series amplifiers.
1.1 About this Manual
The following manual describes how to install, operate, and maintain the
MCPS4080 series of amplifiers. It is arranged into the following sections.
Section 1, Introduction, introduces the systems in the MCPS4080 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
MCPS4080 amplifier system.
Section 4, System Start-up, has procedures for power-up and initial check out of
the MCPS4080 amplifier system.
Section 5, System Monitoring presents information on basic and optional methods
of MCPS4080 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 MCPS4080 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 MCPS4080 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 MCPS4080 amplifier systems.
Appendix A4, MCPS4080 System Check Out, has the procedure for a quick
operational check of the MCPS4080 amplifier system.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Introduction
Throughout this manual, notes, cautions and warnings are used with this
convention:
✎
☛
Note: Sub-optimal 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.
1.1.1 Equipment Changes
Spectrian Corporation reserves the right to make minor changes to the equipment,
including but not necessarily limited to component substitution and circuitry
changes. Modifications that impact this manual may subsequently be incorporated
in a later revision of this manual.
1.2 Safety Information
The MCPS4080 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 MCPS4080 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 theMCPS4080 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 MCPS4080 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 MCPS4080 components.
Always use the recommended safety equipment.
Please read and understand all instructions and warnings before handling an
MCPS4080.
MCPS4080 amplifiers may only be installed in restricted access areas (dedicated
equipment rooms, equipment closets, or the like) in accordance with Article 11016. 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA No. 70.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Introduction
1.3 Introduction to the MCPS4080 Family
The MCPS4080 is a modular, ultra-linear PCS-frequency amplifier system
providing up to 290 Watts (total) of output power. Designed for maximum
flexibility and reliability, the MCPS4080 can increase the range and capacity of
new or existing base stations.
Modulation Formats
The MCPS4080 can amplify any number of signal carriers using IS-136 TDMA,
IS-136HS GSM, IS-136HS EDGE, or IS-95 CDMA modulation up to the
maximum rated system output power.
Modularity
The MCPS4080 family is designed for operation with 1 to 4 amplifier modules,
each providing up to 100 Watts of RF output power (exclusive of combining
losses).
Mounting Configurations
The MCPS4080 amplifier systems are available in a variety of configurations.
Mounting kits are available for installation in 23-inch, 600mm, 24-inch, or 25-inch
equipment racks. Multi-module shelves are 12 RU (21 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 MCPS4080 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 MCPS4080 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 MCPS4080 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 MCPS4080 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
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
Introduction
qualified service technicians, greatly reducing service shipping costs and turnaround time.
1.3.1 MCPA Module Functional Description
To achieve the high level of linearity required to support multiple PCS carriers at
the minimum cost, the RF modules in the MCPS4080 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.
MainPath
Phase/Amplitude
Control
Output Module
Main Amp
Delay Filter
Preamplifier
τ
RF Input
RF Output
Pilot
Generator /
Reciever
Amplifier
Manangement
Delay
Line
Unit
Σ
Carrier
Cancellation
Error Path
Phase/Amplitude
Control
Error Amp
Figure 1: RF Module Functional Block Diagram
1.3.1.1 Main Loop
The output of the main amplifier contains both the desired signal and Intermodulation 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.
1.3.1.2 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
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Introduction
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.
1.3.1.3 Amplifier Management
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 MCPS4080 AMM.
1.3.2 MCPS4080 Amplifier System
A fully-equipped MCPS4080 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.
Splitter
100 W MCPA
Modules
Combiner
RF
Input
÷
Σ
RF
Output
Status Port
RS-232
Alarm Management
Module
Basestation Interface
RS-422 or RS-485
Figure 2 System Block Diagram
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
Introduction
The standard MCPS4080 configurations are summarized in Table 1. Please
consult the factory or Spectrian sales for configurations not listed here.
Power
Dimensions
Comments
(W x D x H)
80-100W
23” x 20” x 3 RU
Single module configuration in 23 in. housing
145W to 290 W
21” x 20” x 8 RU
2 to 4 modules combined in 21 in. rack
configuration
Table 1: MCPS4080 System Configurations
MCPA modules
The RF modules are ultra-linear amplifiers optimized for high power amplification
of PCS signals. Each RF module provides up to 100 Watts of RF output power.
Multi-module systems have combiner losses, which reduce the output power of
each module by approximately 10%. The RF module has been discussed in
section 1.2.1 The end user is responsible for creating a frequency plan and power
allocation, which ensures that in no case the peak output power of a base station
transmitter exceeds 100 watts.
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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
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 MCPS4080. 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 MCPS4080.
2.2 Site Planning Guide
For each MCPS4080 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 MCPS4080 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 MCPS4080 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 MCPS4080, and the installer or technician.
Floor Covering
If you intend to use a floor covering under the MCPS4080, avoid combustible
materials, industrial carpeting, and materials that will permit generation of
electrostatic charges.
Illumination
The MCPS4080 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
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
with viewing the status LED indicators on the front panel. The MCPS4080 should
be oriented or shielded so that direct sunlight does not fall upon the front panel.
Fire Protection
Spectrian recommends that the MCPS4080 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 MCPS4080 above 5000 ft (1542 m), derate the maximum
operating temperature by 2° C per 1000 ft (304 m) above 5000 ft.
Ventilation
The MCPS4080 requires unrestricted airflow around the MCPS4080. The site
must be ventilated or air-conditioned so that ambient air does not exceed 50°
Celsius (122° F).
Ambient air quality
The MCPS4080 should be installed in a location that is free of airborne dust and
toxic or corrosive fumes.
Vibration and Noise
The MCPS4080 tolerates moderate levels of vibration and ambient noise. The
MCPS4080 should not be installed in a location subject to mechanical shocks or
vibrations conducted from nearby mechanical equipment. The MCPS4080
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
MCPS4080 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 MCPS4080 and entire equipment rack be grounded
with an engineered grounding system, including ground halo and ground rods.
2.2.2 Rack Installation Considerations
Rack Space
Multi-module MCPS4080 systems require 12U of rack space in a 21” 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 MCPS4080 requires front cabinet clearance for unrestricted
cooling air input, plus a minimum of 4 inches (102mm) behind the MCPS4080 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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
2.2.3 Cable Connections
DC Power Supply
The MCPS4080 requires customer-supplied connections to the site +27 VDC
power supply. The MCPS4080 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 MCPS4080 systems with the indicated
number of active amplifier modules installed in a system shelf.
# RF
Modules
RF Output
Power
80W (Typical)
I(Max),
27 VDC
45 Amps
100W (MAX)
Recommended Service
2 wires (2/module), #6AWG, #10 lugs
1 ea. 60A Circuit Breaker
145W Typical
90 Amps
4 wires (2/module), #6AWG, #10 lugs
2 ea. 60A Circuit Breaker
220W Typical
135 Amps
6 wires (2/module), #6AWG, #10 lugs
3 ea. 60A Circuit Breaker
290W Typical
180 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 MCPS4080 shelf requires a customer-supplied chassis ground connection using
#8AWG with a ¼” ring lug.
RF Input and Output Cables
The MCPS4080 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 MCPS4080 output power. The female
connectors are on the rear of the MCPS4080 shelf. Spectrian offers optional RF
cables for use in connecting the MCPS4080 amplifier.
Alarm Interface Cables
The MCPS4080 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 MCPS4080 are listed in Appendix A3.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
Radio Parameters
To set up the MCPS4080, the installer must know the following radio parameters
for the MCPS4080 installation.
•
Total Planned Output Power
•
Number of CDMA Frequency Assignments and power of each FA
•
Number of /TDMA/GSM/EDGE 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
MCPS4080 installation and test supplies.
2.3 Determine the required RF input power
Before applying RF input power to the MCPS4080, 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
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
RF Drive Power Worksheet
A) Total output power (POUT ) required =
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 ) =
(PAN = POUT – PCDMA)
D) Total # of channels, including setup (#ch)
E) Maximum per channel output power (PAN/ch)
(PAN/ch = PAN/# of channels)
F) System Gain (Gain) *
G) Maximum composite input power (PIN)
(PIN= POUT in dBm – Gain in dB)
H) Maximum per channel input power (PIN/ch )
dBm
dB
dBm
dBm
(PIN/ch in dBm = PAN/ch in dBm – Gain in dB)
* 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.
2.3.1 Set RF input drive power for each channel
☛
☛
Caution: If the RF Input Cable is connected to the MCPS4080, disconnect it
from the MCPS4080. 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.
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.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
11
Planning and Preparation
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.
2.4 Prepare for Installation
Before beginning the installation, verify that all the necessary site and radio
information, installation materials, tools, and MCPS4080 equipment are on hand.
Correct any problems or omissions before continuing. Refer to the following
Receiving and Unpacking Procedure to prepare the MCPS4080 equipment.
2.4.1 Inventory Received Equipment
☛
1.
Upon receipt of the MCPS4080, 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 MCPS4080 is
unpacked and inspected. To protect your warranty rights, you must also notify
your Spectrian representative and advise that the MCPS4080 was damaged
during shipment.
2.4.2 Unpack Received Equipment
Uncrating, inspecting, and preparing the MCPS4080 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
12
•
Safety glasses
•
Work gloves
•
Steel-toe shoes
•
Back-support belt
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Planning and Preparation
Tools
•
Box knife
•
Pair of large scissors
•
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 MCPS4080 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 MCPS4080. 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 MCPS4080, 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 MCPS4080 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.
2.4.3 Repackaging for Return Shipment
If it is necessary to repackage the MCPS4080 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.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
13
MCPS4080 Installation
3 MCPS4080 Installation
3.1 Introduction
The following section describes how to install the MCPS4080 series amplifier in a
base station.
Each MCPS4080 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 MCPS4080 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 MCPS4080 modules.
The MCPS4080 is designed to be installed by trained and qualified technicians.
☛
☛
✎
Warning: Each MCPS4080 amplifier module and the shelf subassembly weigh
50 lbs (22.7 kgs); when crated for shipping an MCPS4080 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 MCPS4080
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.
3.2 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
•
14
Heat Gun (Master 10008 – MAS or equivalent)
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
MCPS4080 Installation
•
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 MCPS4080 series amplifiers mount in the equipment rack using rackmounted side support rails.
The MCPS4080 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 MCPS4080 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 MCPS4080 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 MCPS4080 side mounting rails and attachment hardware and
install them in the rack as shown on the accompanying job sheet.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
15
MCPS4080 Installation
4.
Unpack the MCPS4080 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 MCPS4080 for ground
wire attachment.
2.
Measure the distance and routing between the MCPS4080 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 MCPS4080 ground stud. Attach
the DC ground wire lug to the grounding stud on the MCPS4080, 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 MCPS4080 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 MCPS4080 in accordance
16
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
MCPS4080 Installation
with local building codes and industry practice. Refer to Table 2 for the
recommended power supply circuit and wire sizing for each option.
☛
WARNIN, 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 back of the switched combiner
assembly. The four #10 lugs are for the per-RF-Module connection.
3.
Measure the distance and routing between the power source and the
MCPS4080 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
MCPS4080 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 MCPS4080 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
MCPS4080. 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
MCPS4080. 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.
2.
Locate the female N-type RF connector labeled “RF OUTPUT” on the
MCPS4080.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
17
MCPS4080 Installation
3.
Screw the male cable connector firmly onto the female RF output
connector of the MCPS4080.
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
MCPS4080.
6.
Screw the male cable connector firmly onto the MCPS4080 female
connector.
3.4.4 Connect Alarm Interface Cables
1.
The MCPS4080 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 MCPS4080.
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 MCPS4080. Tighten the two screws on the cable connector (if any)
firmly.
3.5 Completing the Installation
3.5.1 Set the MCPS4080 unit address
Each MCPS4080 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 MCPS4080, locate the rotary switch on the rear of
the MCPS4080 Amplifier Management Module. Set the switch to the desired
address.
3.5.2 Verify Installation
Recheck all physical and electrical connections to the MCPS4080 and remedy any
problems discovered.
Once the installation is verified, the MCPS4080 is ready to be set up and placed in
service, as described in the next section.
18
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
System Start-Up
4 System Start-Up
4.1 Introduction
This section contains instructions on powering up the MCPS4080 amplifier
system. These procedures should be followed after installing the MCPS4080
amplifier system in the rack.
4.2 Safety Information and Tools
To avoid injury, installers, technicians, and maintenance personnel must follow
Spectrian's recommended procedures and observe safety precautions.
✎
Warning: The MCPS4080 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 MCPS4080 was inspected and found free of
mechanical and electrical defects. The electrical performance of the MCPS4080
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 MCPS4080, 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
MCPS4080.
2.
Ensure that the DC power supply at the site is functioning normally. DO
NOT turn on the DC supply to the MCPS4080 at this time.
3.
Ensure that the MCPS4080 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.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
19
System Start-Up
4.
If used, verify that the MCPS4080 address is set correctly.
WARNING: The RF output of the MCPS4080 should be connected to a 50-ohm
load before DC power is turned on. The load must be capable of dissipating at
least 290 watts average power and 3,750 watts of peak power.
After mechanical and electrical installation tasks are complete, the MCPS4080 is
ready for power-on check.
4.4 Power Up the MCPS4080
☛
✎
Caution: Read and understand all of the following steps before taking any
action.
Note: The MCPS4080 should be powered on and enabled before the RF input
power is applied.
1.
Switch on the DC input power to the MCPS4080. 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 MCPS4080 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 MCPS4080 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 AMBER.
☛
20
2.
Wait 5 minutes for the MCPS4080 to reach a stable operating
temperature. DO NOT apply commercial traffic signal power during this
time.
3.
If the MCPS4080 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 MCPS4080 status LED indicators remain GREEN.
5.
If any LED indicators are AMBER, 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 MCPS4080, 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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
MCPS4080 System Monitoring
5 MCPS4080 System Monitoring
5.1 Introduction
This section describes methods for monitoring the MCPS4080 amplifier system
operation.
5.2 Monitoring the MCPS4080 System Operation
The MCPS4080 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
MCPS4080 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.
5.3 Alarm Definitions
Fault management may be accomplished by various means with the MCPS4080.
The MCPS4080 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
MCPS4080 alarm and protection circuits.
5.3.1 Alarm classification
The MCPS4080 fault management subsystem classifies faults into three
categories. In order of escalation, these are minor faults, major faults, and critical
faults.
5.3.1.1 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.
5.3.1.2 Major Alarm
A major problem exists such that the MCPS4080 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.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
21
MCPS4080 System Monitoring
5.3.1.3 Major Alarm
A major failure or a condition exists that could result in damage. The MCPS4080
is automatically taken out of service.
Immediate service attention is required.
5.3.2 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 MCPS4080 in operation unless
continued operation would result in damage to the unit. Under some fault
conditions, the MCPS4080 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 MCPS4080 until repairs can be completed.
5.3.2.1 Automatic Alarm resets
Critical Alarm
When a critical alarm occurs, the MCPS4080 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 MCPS4080 attempts to clear the fault by
performing a reset. In most cases, the MCPS4080 will attempt to reset five times.
If the alarm condition fails to clear after five attempts, the MCPS4080 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 MCPS4080
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.
5.3.2.2 Manual Alarm resets
When a major Alarm is detected, the operator may choose from the following
options:
22
•
Take no action and allow the MCPS4080 to operate in a degraded state until
service can be performed.
•
Shed input channels to reduce the power to the MCPS4080.
•
Disable the RF Module using the front panel switch, diagnostic port, or
optional base station alarm and control interface
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
MCPS4080 System Monitoring
5.4 MCPS4080 Alarm Limits and Protection Circuits
The MCPS4080 series of multi-carrier 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 MCPS4080 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
MCPS4080 family of MCPA amplifier systems is 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 is 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.
5.4.1 MCPA Module Analog Protection Circuits
The MCPS4080 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
Latch
Input Overdrive
> -2 dBm @ Input (configured for 55dB module gain)
No
Error Amp Overdrive
> -15 dBm @ Carrier Cancellation Input
No
Over voltage Clamp
Internal DC line is limited to 28V by linear regulation
up to 30V input
No
Circuit Breaker
> 60 A current draw
Yes
Table 3: Analog Protection Circuit
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
23
MCPS4080 System Monitoring
5.4.2 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
Major
LED Amber
System malfunctioning but operating (degraded
performance)
System Reset after Dwell
Table 4: Module Alarm Hierarchy
Description
GUI
Mnemonic
Minor
Alarm
Set Point
Major
Alarm
Set Point
Major Alarm
(Module
Shutdown)
Critical
Alarm
Dwell Time
Critical
Alarm Latch
Hysteresis
Reset Point
Main Amp
Base Temp
TMP
75°C
> 82 ° 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
Adjustment
limit rail
N/A
N/A
No
N/A
Load VSWR
VSR
>4:1
N/A
No
N/A
RF Overdrive
OPR
N/A
>125W
2 sec
Yes
150W
Fan Failure
FAN
Low RPM
(≤50%
rated)
1 Fan
Failed
2 Fans Failed
None
No
N/A
Input Current
CKT
N/A
>60A
>60A
No Delay
After 3 Failures
N/A
Gain Drop
GAN
N/A
< -3 dB
N/A
2 sec.
No
< -1 dB
>10:1
Table 5: Default Alarm Descriptions and Settings
5.4.3 MCPA System Alarms
A multi-module 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.
The customer usually specifies messaging layer customization. In addition
Spectrian does maintain an internal standard for serial messaging. System status is
generally a combination of the module status. The customer also specifies this. An
example of a system alarm hierarchy might be as noted in the table below.
24
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
MCPS4080 System Monitoring
MCPA Alarm
Condition
Amplifier System Status
Summary Logic
Minor
At least one module reporting a minor alarm OR
Major
At least 3 modules reporting a critical alarm
AND
Table 6: Typical MCPS System Alarm Hierarchy
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
25
Troubleshooting and Maintenance
6 Troubleshooting and
Maintenance
6.1 Introduction
The following chapter provides basic information about diagnosis of problems
with the MCPS4080. 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, theMCPS4080 was inspected and found free of
mechanical and electrical defects. The electrical performance of theMCPS4080
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.
26
Warning: The MCPS4080 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 MCPS4080 before performing procedures that
do not require power. For those procedures that do require power, be extremely
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Troubleshooting and Maintenance
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.
6.2.1 Using LED Indicators
Each MCPS4080 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
LED’s
Green
Amber
POWER
Voltage OK, 26 VDC
<22 V or >30V; RF shuts down
ENABLED
Enabled
Disabled
STATUS
OK
Major Alarm
FAN
OK
Fan Failure
AMM LED’s
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
6.2.2 Using the Diagnostic Port Output
Use of the Diagnostic Port is described in the release notes with the interface
software distribution.
6.2.3 Using Remote Alarm Monitoring
The MCPS4080 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 MCPS4080 fault management system and its associated alarms and
fault indicators operate independently of the serial interface.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
27
Troubleshooting and Maintenance
6.3 Periodic Maintenance
6.3.1 Dust Removal
Keep the air inputs and outputs of the MCPS4080 free of dust or other material
that could block cooling airflow.
6.3.2 Visual Inspection
Periodically visually inspect the MCPS4080 to ensure that all indicators are
functioning normally and that all system interfaces are properly connected.
6.4 Module Replacement
The RF modules of the MCPS4080 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.
6.4.1 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 AMBER.
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
28
1.
Turn off the DC power to the MCPS4080.
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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Troubleshooting and Maintenance
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 MCPS4080. The system will perform a powerup 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
MCPS4080.
Warning: Remove all DC and RF connectors prior to removing the MCPS4080
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 MCPS4080 straight out from the rack.
5.
Set the disconnected MCPS4080 aside in a clean, safe place, free of
electrostatic charges.
6.
Remove the replacement MCPS4080 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 MCPS4080 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.
4.
Disconnect the fan power cable.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
29
Troubleshooting and Maintenance
30
5.
Unfasten the 4x captive retaining nuts & remove the fan module.
6.
Fasten replacement module in place using the 4x captive nuts.
7.
Connect the fan power cable.
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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Appendix A1 Spectrian, Inc. Offices
Appendix A1 Spectrian, Inc.
Offices
Spectrian Headquarters
350 West Java Drive
Sunnyvale, Calif. 94089
Ph:
Fax:
408-745-5400
408-541-0263
Web:
www.spectrian.com
Spectrian, Asia Office
4TH FL., Ensung Building,
601-18, Yoksam-Dong, Kangnam-Ku,
Seoul, 80-080, Korea
Ph:
Fax:
822-545-6441
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:
Fax:
800-793-7222
408-541-0263
Technical Support Line
Ph:
408-745-5416
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
31
Appendix A2 Major Electrical Specifications
Appendix A2 Major Electrical
Specifications
Major Equipment Specifications for the MCPS4080 Amplifier System
Electrical Specifications
Frequency Range
Average Power¹ into 50 Ohms
Specification @ 25ºC
1930 - 1990 MHz
80W (49.0 dBm) typical,
100W (50.0 dBm) max.
Intermodulation Distortion (IMD)
-63 dBc with TDMA IS-136,
CDMA Adjacent Channel Power2
< -45 dBc, 885 KHz offset, 30 KHz res bandwidth
@ 1960 MHz, 100W Output
< -60 dBc, 1.98 MHz offset, 30 KHz res bandwidth
<-13 dBm, 2.25 MHz offset, 1MHz res bandwidth
Receive Band Noise
60 dBc
Carrier Spacing (TDMA)
60 KHz min., 20 MHz max.
Power Output Stability for Single Frequency
± 0.5 dB under nominal conditions
Operating Bandwidth
up to 20 MHz
Gain
Factory set, 45 to 55 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
-45 dBc / -70 dBc
DC Input Voltage Range
26 to 28VDC
VDC
DC Input Current @ 27
± 1 VDC
45A Max @ 80 Watts
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.
32
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Appendix A3 Major Mechanical Specifications
Appendix A3 Major Mechanical
Specifications
Mechanical Specifications
Operating/Storage Temperatures
Size, 4 module shelf
(Excludes mounting ears and handles).
0ºC to 50ºC/-40ºC to 85ºC
(D x W x H)
19.7 x 19.7 x 21.0 in. max
(500 x 500 x 533 mm max.)
Size, 1 module shelf
(Excludes mounting ears and handles).
19.7 x 21.7 x 5.25 in. max
(500 x 550 x 133. mm max.)
Weight, 4 module shelf (Empty)
Installed: approx. 45 lbs (20 kg)
Shipping: approx. 60 lbs max. (27 kg)
Installed: approx. 22 lbs (9 kg)
Shipping: approx. 29 lbs max. (13 kg)
Installed: approx. 50 lbs max. (22.7 kg)
Shipping: approx. 65 lbs max. (29.5 kg)
Weight, 1 module shelf (Empty)
Weight, 1 module
Connectors
RF Input(s): SMA (F)
RF Output(s): N (F)
RF Output Sample Port: SMA (F)
DC Inputs: 10-32 threaded lugs
DC Ground: 10-32 threaded lugs
Maintenance Port: RS232
Alarms Port: RS422 (standard)
RS232 (Front panel port) pinout:
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Indicators
AMM: DC On, Alarm LEDs
MCPA Modules: DC On, Enable, Alarm, Fan
LEDs
GND
TX
RX
N/C
GND
N/C
RTS
CTS
N/C
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
33
Appendix A3 Major Mechanical Specifications
Mechanical Outlines
MCPS4080 Shelf Configuration
34
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Appendix A3 Major Mechanical Specifications
MCPA Module for MCPS4080 Family
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
35
Appendix A4: MCPS4080 System Checkout
Appendix A4: MCPS4080
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
36
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.
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
Appendix A4: MCPS4080 System Checkout
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.
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
37
INDEX
7 INDEX
acoustic treatment
airborne dust
air-conditioning
alarm configurations
alarm connection
Alarm Definitions
alarm output
connection
alarm/protection hierarchy
ambient noise
AMM
installation
replacement
Amplifier Management Module
Amplifier Management Unit
Amplifier System Alarms
AMPS
modulation
AMU
Analog Protection Circuit
summary table
Analog Protection Circuits
average power
rated
Block Diagram
RF module
building codes
bussed power option
DC power
cabinet clearance
cancellation
Caution
definition
CDMA
CDPD
chassis ground
checking
connection
38
23
21
18
23
16
28
23
23
23
32
17
16
16
combiner
active
combiner losses
output
combustible materials
floor covering
composite power
cooling air
critical faults
definition
customer service
contact information
DC input voltage range
DC power supply
requirements
DC wire
connecting
default alarm
settings
degraded operation
derate
for altitude
DISABLE
RF module
dust
removal
error loop
error signal
ESD protective wrapping
fan
replacement
feed-forward
fire codes
fire-extinguishing
in site
floor covering
form C
frequency
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.
11
15
21
31
32
17
23
22
20
28
13
29
32
INDEX
Graphical User Interface
ground halo
site
grounding system
site
guides
module alignment
hot air
exhaust
hot-swappable
RF modules
input drive level
worksheet
installation
verify
installations
intended
Introduction
IS-136 TDMA
IS-95
lighting
working area
lightning arrestors
lightning protection
main loop
major faults
definition
MCPS address
setting
Mechanical Outlines
minor faults
definition
Module Alarm Hierarchy
table
module alarms
summarized
Module Alarms
Module Replacement
multimodule MCPA
Note
definition
out of service
alarm
over-temperature
3, 21, 23
16
28
10
19
21
18
34
21
24
23
23
28
25
22
alarm reset
packing lists
Periodic Maintenance
physical layer
alarms
pinout
RS232
planning
site
positive supply
connecting
powering up
power-up self-test
problem
diagnosis
protection circuits
built-in
radio parameters
recommended power service
Replacing MCPS4080 Fan Modules
required current
return shipment
return wire
connecting
RF cabling
integrity
RF input drive
setting
RF load
test
RF module
disabling
installation
RF output
connecting
safety equipment
installation
self-reset
automatic
shipping containers
opening
shipping damage
shipping documents
side support rails
MCPS4080 System Operation
2001 Spectrian Corporation. All rights reserved.
22
12
28
25
33
17
19
20
26
23
10
29
13
17
17
11
20
20
16
17
14
22
13
12
12
15
39
INDEX
smoke detectors
summarized
alarms
uncrating
unrestricted airflow
40
23
12
vibration
Warning
definition
weight
wrist strap
13, 15
MCPS4080 Operations Manual
2001 Spectrian Corporation. All rights reserved.

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