Powerwave Technologies 5JS0087 Users manual

G3L-850-160

Multi-Carrier

Power Amplifier

Installation and
Service Manual

044-05236 Rev A

June 2006

© 2006 Powerwave Technologies Incorporated. All rights reserved.
Powerwave Technologies, and the Powerwave logo are registered trademarks.
This Powerwave product i s inte nded only for in stallatio n in a REST RICTED A CCESS LOCATION and

this Powerwave product is des igned to operate within the no rmal operating ( typical operati ng) ranges
or conditions spec ified in this document. O peration of this equ ipment beyond the speci fied ranges in
this document may cause:

1. Spurious emissions that violate regulatory requirements.

2. The equipment to be automatically removed from service when maximum thresholds are exceeded.

3. The equipment to not perform in accordance with its specifications.
It is the operator’s responsibility of the operator to ensure this equipment is properly installed and

operated within Powerwa ve operating specificatio ns to obtain p ro per per fo rm ance fr om the e qui pme nt
and to comply with regulatory requirements.

For PERMANENTLY CONNECTED EQUIPMENT, a readily accessible disconnect device shall be
incorporated in the building permanent wiring.

G3L-850-160 MCPA Warnings, Cautions, and Notes

Warnings, Cautions, and Notes

Warnings, Cautions, and Notes are found throughout this manual where applicable. The associated
icons are used to quickly identify a potential condition that could result in the consequences described
below if precautions are not taken. Notes clarify and provide additional information to assist the user.

WARNING: This warning symbol means danger. You are in a situation that could cause
bodily injury or death. Before working on any equipment, be aware of the hazards involved
with electrical and RF circuits and be familiar with standard practices for preventing acci­dents.

CAUTION: The caution symbol means reader be careful. In this situation, the user might do
something that could result in equipment damage or loss of data.

NOTE

The note symbol means reader take note. Notes contain helpful suggestions or references
to material not covered in this document. Procedures are not contained in notes.

044-05236 Rev A i

Revision Record G3L-850-160 MCPA

Revision Record

Revision Letter Date of Change Reason for Change

A June 2006 Initial Release

ii 044-05236 Rev A

Table of Contents

Chapter 1 - Product Description

1.1.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2.Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.3.Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.4.Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.4.1.Preamplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.4.2.Main and Error Amplifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.4.3.Feed-forward Loop Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.4.4.Pilot Tone Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.4.5.Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.5.Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.6.Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Chapter 2 - Controls and Indicators

2.1.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

2.2.MCPA Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

2.2.1.MCPA Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

2.2.2.MCPA Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Chapter 3 - Install ation

3.1.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.2.Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.2.1.Damaged Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.3.Air Conditioning Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.4.MCPA Installation Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.5.Initial Start-up and Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Chapter 4 - Maintenance

4.1.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.2.Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.3.MCPA Performance Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.4.Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.5.MCPA Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4.6.Return For Service Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

4.6.1.Obtaining An RMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

4.6.2.Repackaging for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Chapter 5 - Specifications

5.1.Multi-Carrier Power Amplifier Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

044-05236 Rev A iii

List of Figures G3L-850-160 MCPA

List of Figures

Figure 1-1 MCPA Front and Rear Isometric Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Figure 1-2 MCPA Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Figure 2-1 MCPA Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2 MCPA Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 3-1 MCPA Locking Thumbscrews and Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Figure 4-1 MCPA Performance Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Figure 5-1 MCPA, Side View with Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Figure 5-2 MCPA, Bottom View with Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

List of Tables

Table 2-1 MCPA Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Table 2-2 MCPA Alarm States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Table 2-3 MCPA Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Table 3-1 MCPA Unpacking and Inspection Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Table 3-2 MCPA Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Table 3-3 Initial Start-up Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Table 4-1 Recommended Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Table 4-2 Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Table 4-3 MCPA Performance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Table 4-4 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Table 4-5 MCPA Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Table 5-1 MCPA Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

iv 044-05236 Rev A

1.1 Introduction

This manual contains information and procedures for the installation, operation, and maintenance of
the G3L-850-160 Multi-Carrier Power Amplifier (MCPA).

1.2 Scope of Manual

This manual is intended for use by service technicians familiar with similar types of equipment. It
contains service information required for the equipment described and is current as of the printing
date. Changes which occur after the printing date may be incorporated by a complete manual revision
or alternatively as additions.

The manual is organized into the following chapters:

Chapter 1 - Product Description
Chapter 2 - Controls and Indicators
Chapter 3 - Installation
Chapter 4 - Maintenance
Chapter 5 - Specifications

Chapter 1

Product Description

1.3 Product Description

The MCPA shown in Figure 1-1 is a linear, feed-forward multi-carrier power amplifier that operates in
a 25MHz frequency band from 869 MHz to 894 MHz with an instantaneous bandwidth of 25 MHz. The
instantaneous bandwidth is the maximum frequency band in which any two or more signals can
occupy. The instantaneous bandwidth of the MCPA is set automatically.

The MCPA is modular in design and ideally suited for use in GSM, EDGE, CDMA, and W-CDMA base
stations. The MCPA provides a gain of 63 dB to provide a 160 watt output. Refer to Figure 1-2 for the
MCPA functional block diagram. Refer to Chapter 5 for the MCPA specifications.

1.4 Functional Description

The MCPA is a self-contained module typically operated in parallel with other identical MCPAs as part
of a subrack assembly.

The MCPA consists of the following major functions:

• Preamplifier

• Main and error amplifiers

• Feed-forward loop control circuits

• Pilot tone generator

044-05236 Rev A 1-1

Functional Description G3L-850-160 MCPA

• Controller

Front

Rear

Figure 1-1 MCPA Front and Rear Views

1-2 044-05236 Rev A

G3L-850-160 MCPA Functional Description

RF In

Preamp

Pilot Tone

Pilot Tone
Generator

FIRST LOOP

First Loop

Phaseand Gain

First Loop
Control

VDC VDC VDCVDC

SECOND LOOP

Reflected

Delay
Filter

Error
Amplifier

Power

RF Out

(VSWR)

Premain
Amplifier

RF Sample

First Loop
Detection

Controller

User
Interface

Second

Phase and Gain

System
Faults

Delay

-5

+5+9+15

+27 VDC

Main
Amplifier

Loop

Second Loop
Control

Error Out

Forward Power / Pilot Tone Detect

Front Panel

Status

LED

Control

ON/OFF/RESET
Switch

Figure 1-2 MCPA Functional Block Diagram

1.4.1 Preamplifier

The carrier (RF In) is applied to the input port of the MCPA and fed to the preamplifier stage where it
is amplified using two stages of class A mode amplifiers. The output of the preamplifier is split into two
paths, one to the main amplifier and one to the error amplifier.

1.4.2 Main and Error Amplifiers

The main amplifier provides the balance of gain and power in the 869 MHz to 894 MHz frequency
band, using class AB amplification for maximum efficiency. The error amplifier and feed forward loops
correct signal non-linearities introduced by the class AB main amplifier.

In the error amplifier, which operates in class A mode, the RF signal is coupled to an attenuator and
phase shifter in the first feed-forward loop, phase shifted by 180 degrees and then amplified in the
premain amplifier. The output from the pre-main amplifier is fed to the class AB main amplifier and
then sampled using a coupler. The signal (RF sample) is combined with the main input signal and
input to the second feed-forward loop.

There, the RF sample is attenuated, phase shifted 180 degrees, and fed to the error amplifier where it
is amplified to a level identical to the sample output from the main amplifier. The output from the error
amplifier (Error Out) is coupled back and added to the output from the main amplifier, with the control
loops continuously making adjustments to cancel out any distortion in the final output signals.

044-05236 Rev A 1-3

Cooling G3L-850-160 MCPA

1.4.3 Feed-forward Loop Control Circuits

The primary function of the first loop is to amplify the carrier signals and isolate an error signal for the
second loop. It does this by amplifying the carrier signals and isolating an error signal which is passed
to the second loop. The first loop control section phase shifts the main input signals by 180 degrees
and constantly monitors the output for correct phase and gain.

The primary function of the second loop is to amplify the error signal to cancel out spurious products
developed in the main amplifier. The input signal is amplified by a preamplifier and fed to a coupler
and delay line. The signal from the coupler is fed to the attenuator and phase shifter in the first loop.

The second loop control section obtains a sample of the distortion added to the output signals by the
main amplifiers. The signal is phase shifted 180 degrees, then fed to the error amplifier where it is
amplified to the same power level as the input sample. The signal is then coupled to the main
amplifier output. The final output is monitored by the second loop and adjusted to ensure that the
signal distortion and intermodulation distortion on the final output is cancelled out.

During routine operation, all normal variations are automatically compensated for by the feed-forward
loop control. If large variations occur beyond the adjustment range of the loop control, the controller
shuts down the MCPA RF section and a loop fault is reported to the system.

1.4.4 Pilot Tone Generator

The pilot tone is an internally generated signal with a predetermined frequency, phase, and amplitude
is known. If the pilot signal is suppressed at the amplifier output, then the distortion created by the
main amplifier is also suppressed.

The pilot tone signal is injected into the first loop and detected at the feedforward output of the second
loop. The pilot tone is coupled off of the main amplifier creating a second pilot tone that is attenuated
and phase shifted 180 degrees to be used as the reference. The second pilot tone is amplified in the
error amplifier and mixed with the signals from the main signal path.

The first and second pilot tones should cancel each other out in an ideal situation. If the output
detector senses that the pilot tones do not cancel each other out, the information feeds back to control
the gain and phase of both the main and error amplifier paths minimizing output distortion.

1.4.5 Controller

The controller constantly compares the active RF paths with internal references for dynamic
correction of small variations through the RF feedback control circuits to maintain constant gain, and
also provides the alarm monitoring and control for the MCPA.

A front panel mounted tri-color LED provides MCPA operational status to the local operator. The OFF/
ON/RESET switch allows the operator to power on, power off or reset the MCPA. System faults are
sent to a remote location through the user interface.

1.5 Cooling

The MCPA components are mounted on a heatsink and cooled by forced air flowing over the heatsink
fins. System fans draw external air through the MCPA front panel inlet and exhaust air through the
MCPA rear panel outlet. The internal temperature is monitored to keep the MCPA within the specified
operating temperature.

1-4 044-05236 Rev A

G3L-850-160 MCPA Power Distribution

1.6 Power Distribution

The host system provides +27 VDC power for the MCPA. The DC/DC converter and voltage regulator
in the MCPA converts the +27 VDC to +15 VDC, +9 VDC, +5 VDC, and -5 VDC for internal use. The
MCPA has no built-in short-circuit protection.

The MCPA operates at full power if the system DC supply is within 26 to 30 VDC. The MCPA shuts
down if the applied DC power is less than 21.5 VDC or greater than 30.5 VDC.

044-05236 Rev A 1-5

Power Distribution G3L-850-160 MCPA

This page intentionally left blank.

1-6 044-05236 Rev A

2.1 Introduction

This chapter contains descriptions of the G3L-850-160 Multi-Carrier Power Amplifier (MCPA) controls
and indicators.

2.2 MCPA Controls and Indicators

The location of the MCPA controls and indicators are illustrated in Figure 2-1 and listed with
descriptions in Table 2-1.

Multi-color

LED Status Indicator

OFF/ON/RESET Switch

Chapter 2

Controls and Indicators

Figure 2-1 MCPA Controls and Indicators

2.2.1 MCPA Alarms

MCPA alarm conditions are reported to the system as logic level signals through the rear connector.
The front panel LED provides a visual reference for the operator of MCPA status. Refer to Table 2-1
for a listing of LED states. Refer to Table 2-2 for a listing of Alarm states.

044-05236 Rev A 2-1

MCPA Controls and Indicators G3L-850-160 MCPA

Table 2-1 MCPA Controls and Indicators

Controls and Indicators Description

Toggle Switch, Three Position

RESET (Up) Resets MCPA. LED indicates boot mod e (red), then turns s olid

ON (Center) Enables MCPA. LED indicates solid green

OFF (Down) Disables MCPA. LED Indicates solid red

LED, Status

Green (solid) RF enabled, OFF/ON/RESET swit ch set to On (center position),

Green (blinking) Standby

Yellow (solid) Minor Alarm - APC function enabled

Yellow (blinking) VSWR Warning

Red (solid) Major alarm - Critical fault present.

Red/Yellow (alternating) Downloading. Do not interrupt power.

green

normal operation, no alarm

Table 2-2 MCPA Alarm States

Alarm Definition Alarm type/LED Auto-Recovery

Output
Overpower

Automatic
Power Control
(APC)

Input
Overdrive

High
Temperature

Disables MCPA immediately if
output power is >+2 dB over rated
output RF power.

Enabled if output powe r is > 52.67
dBm.*

Disables MCPA immediately if input
RF drive is >-5 dBm

Disables MCPA if sensor
temperature is > +95° C.

Major
(Red)

Minor
(Yellow)

Major
(Red)

Major
(Red)

Input power decreases below APC
threshold (-11.2 dBm)

MCPA auto-recovers when output
power drops below rated maximum
output power.

Input power decreases below APC
threshold (-11.2 dBm)

MCPA auto-recovers when sensor
temperature drops to less than +70
°C.

2-2 044-05236 Rev A

G3L-850-160 MCPA MCPA Controls and Indicators

Table 2-2 MCPA Alarm States (Continued)

Alarm Definition Alarm type/LED Auto-Recovery

High Reverse
Power

Exceed
Maximum
Voltage

Below
Minimum
Voltage

Loop Fail
(Linearization
Alarm)

Internal DC
Fail

Device Fail Alarm if one or more output power

Disables MCPA if the reverse RF
output power is hi gher t han 49 dBm
for a duration of 1-minute.

Disables MCPA immediately if
supply DC voltage > +30.5 VDC.

Disables MCPA immediately if
supply DC Voltage < +20.5 VDC

Disables MCPA if loop convergence
fails.

Alarm if internal voltages fail or out
of range.

devices fail.

Minor (Yellow)
during 1­minute
validation
period then
changes to
Major (Red)

Major
(Red)

Major
(Red)

Major
(Red)

Minor
(None)

Minor
(None)

Reverse power must be < 48.3 dBm.

Auto-recovery when supply voltage
drops to < +29.5 VDC.

Auto-recovery when supply voltage
increases to >+24.0 VDC

Auto-recovery when loop converges.
MCPA tries to auto recover ten times
before permanent shut down. Two
minutes and 5 seconds for each try.

Auto-recovery once voltage is within
range. No shutdow n until lineari zation
alarm occurs.

No auto-recovery. No shutdown until
linearization alarm occurs.

*Note: If MCPA cannot compensate gain to maintain compliance, Output Overpower or Input Overdrive faults protect
MCPA.

2.2.2 MCPA Connectors

The MCPA power, alarm, control, and RF connections are made through a D-sub combination male
interface connector located on the rear of the MCPA. Pin assignments are illustrated in Figure 2-2 and
listed in Table 2-3. Alarms are interpreted and generated by the MCPA and reported to the base
station as a system level alarm. The PC I/O RJ-11 connector is for factory use only.

123

A1

A2

10 1112 13 14 1516 17

Figure 2-2 MCPA Interface Connector

456789

A3

A4

044-05236 Rev A 2-3

MCPA Controls and Indicators G3L-850-160 MCPA

Table 2-3 MCPA Connector Pinouts

Pin Function Pin Function

A1 RF Input (Coaxial Contact) 8 SUMMARY_FAULT (Fault info) TTL

A2 +27 VDC (Power Contact) 9 DC_ON/OFF (On/Off)

A3 Ground (Power Contact) 10 PAU_RST (System Reset) TTL

A4 RF Output (Coaxial Contact) 11 NC

1 TX_H (RS-485) 12 NC

2 TX_L (RS-485) 13 AMP_A0 (PAU ID)

3 GND 14 AMP_A1 (PAU ID)

4 RX_H (RS-485) 15 AMP_A2 (PAU ID)

5 RX_L (RS-485) 16 HPE

6 GND 17 PAU_TEMP (Voltage for

7 MOD_DET (Module Detection)

Temperature Measurement)

2-4 044-05236 Rev A

3.1 Introduction

This chapter contains unpacking, inspection, startup and installation procedures for the G3L-850-160
Multi-Carrier Power Amplifier (MCPA).

• Review this chapter prior to equipment installation.

• Review any government and local codes applicable to this installation.

• Read the instructions in this Chapter and Chapter 4 before operating the equipment.

3.2 Unpacking and Inspection

Perform the steps in Table 3-1 to unpack and inspect the MCPA.

Table 3-1 MCPA Unpacking and Inspection Instructions

Step Action

Chapter 3

Installation

1

Carefully open container and remove MCPA.

2

Visually inspect MCPA for damage that may have occurred during shipment.
Check for evidence of water damage, bent or warped chassis, loose screws or
nuts, or extraneous packing material in connectors. If possible, inspect equipment
in the presence of the delivery person.

3

If possible, retain all packing material that can be reused for repackaging
components.

3.2.1 Damaged Equipment

If the MCPA is damaged, a claim should be filed with the carrier when the extent of any damage is
assessed. Contact the factory for a return material authorization (RMA). Refer to Chapter 4 for the
return procedure.

3.3 Air Conditioning Requirem ents

The MCPA generates 2770 BTUs of heat at 36 amps, 27 VDC and 160 watts average RF power
output. The MCPA operates within the extended low temperature and high temperature environments
as listed in Chapter 5.

3.4 MCPA Installation Instructions

CAUTION: Do not slam the MCPA into the system subrack during installation. Using
excessive force can damage the MCPA interface connector.

044-05236 Rev A 3-1

Initial Start-up and Operating Procedures G3L-850-160 MCPA

(

The modular MCPA can be installed in a variety of systems. All system connections to the MCPA are
made through the MCP A rear connector, no additional wiring is required. Perform the steps in Table 3­2 to install the MCPA. Refer to Figure 3-1 for quarter-turn fastener position and switch location.

Table 3-2 MCPA Installation

Step Action

1

Set MCPA OFF/ON/RESET switch to the OFF (down) position.

2

Ensure quarter-turn fasteners are in unlocked position.

3

Lift and insert MCPA into the subrack. Turn the quarter-turn fasteners to locked
position to secure MCPA into subrack.

Quarter-turn

fastener

RF Switch:

RESET

ON

OFF

RJ-11

Connector

Factory use only)

Quarter-turn

Unlocked

Locked

Interface

Connector

fastener

Figure 3-1 MCPA Quarter-turn fasteners and Connectors

3.5 Initial Start-up and Operating Procedures

Perform the MCPA initial start-up per the instructions in Table 3-3.

CAUTION: Before applying power, e nsure input and output cables are properly ter minated at
the Duplexer front panel. Do not operate MCPA without a load attached. Excessive input
power may damage the MCPA. Refer to Chapter 5 for input power requirements.

3-2 044-05236 Rev A

G3L-850-160 MCPA Initial Start-up and Operating Procedures

Table 3-3 Initial Start-up Procedure

Step Action

1 Verify all system input and output cables are properly connected.

2 Verify +27 VDC (+/- 1 VDC) supply is available.

3 Set MCPA OFF/ON/RESET switch to ON (center) position.

4 Allow MCPA to warm-up for a minimum of two minutes before taking power readings.

044-05236 Rev A 3-3

Initial Start-up and Operating Procedures G3L-850-160 MCPA

This page intentionally left blank.

3-4 044-05236 Rev A

4.1 Introduction

This chapter contains instructions for periodic maintenance, testing and troubleshooting for the G3L­850-160 Multi-Carrier Power Amplifier (MCPA).

4.2 Periodic Maintenance

Chapter 4

Maintenance

NOTE

Periodic maintenance requirements for the MCP A are listed in Table 4-1.

Task Interval Action

Cleaning 3 Mon ths Inspect for debris especia lly arou nd fro nt p a nel ven t s. Remove

Performance tests Optional Perform testing in accordance with Paragraph 4.3.

Check your sales order and equipment warranty before attempting to service or repair unit.
Do not break seals on equipment under warranty or the warranty will be null and void. Do
not return equipment for warranty or repair service until proper shipping instructions are
received from factory.

Table 4-1 Recommended Periodic Maintenance

dust with a soft cloth/brush or vacuum cleaner

4.3 MCPA Performance Tests

MCPA Performance tests are only performed at the factory. Refer to the troubleshooting instructions
in Section 4.4.

4.4 Troubleshooting

Perform the instructions in Table 4-2 in the case of an MCPA fault or alarm.

Table 4-2 Troubleshooting

Step Action

1 Check for proper DC supply voltage.

2 Set the OFF/ON/RESET switch momentarily to RESET (Up) position.

3 Contact your field representative or the factory if fault does not clear.

4.5 MCPA Removal and Replacement

Perform the instructions in Table 4-3 to remove and replace a MCPA.

044-05236 Rev A 4-1

Return For Service Procedu re s G3L-85 0- 160 MCPA

CAUTION: Do not slam the MCPA into the system during installation. Using excessive force
can damage the MCPA connector.

CAUTION: When removing the MCPA from the system, support the MCP A to pr event the rear
of the MCPA from suddenly dropping when the guide rail disengages from the track.
Dropping the MCPA can damage the rear multi-pin connector. The MCPA weighs
approximately 28.60 lbs. (12.97 kg).

Table 4-3 MCPA Removal and Replacement

Step Action

1 Set MCPA OFF/ON/RESET switch to OFF (down).

2 Loosen two quarter-turn fasteners that secure MCPA to the subrack.

3 With steady even pressure, use handle on front of the MCPA to pull the MCPA out of the

system.

4 To replace MCPA, set MCPA OFF/ON/RESET switch to OFF (down).

5 Turn quarter-turn fasteners to Unlocked position.

6 Insert MCPA into subrack. Turn quarter-turn fasteners to locked position to secure MCPA.

4.6 Return For Service Procedures

When returning products to Powerwave, the following procedures will ensure optimum response.

4.6.1 Obtaining An RMA

A Return Material Authorization (RMA) number must be obtained prior to returning equipment and to
reduce delays in receiving repair service. Please contact our Repair Department at [phone] to
obtain this number, or FAX your request to [phone].

4.6.2 Repackaging for Shipment

To ensure safe shipment of a component, it is recommended that the original packing materials be
reused If this is not possible, use suitable shipping cartons and foam inserts to prevent damage in
transit.

4-2 044-05236 Rev A

5.1 Multi-Carrier Power Amplifier Specifications

The performance and physical specifications for the G3L-1929-160 MCPA are listed in Table 5-1.
.

Table 5-1 MCPA Specifications

Electrical Specifications/Features

Operating Frequency Band 869-894 MHz

Instantaneou s Bandwidth 25 MHz

Air Interface GSM, EDGE,.CDMA, W-CDMA

Chapter 5

Specifications

RF Output Power 160 W (Min.) with seven GSM and one EDGE signal

Maximum Input (before shutdown) -5 dBm

Duty Cycle Continuous

BTUs 2770 at 36 Amps, 27 V and 160 W average RF power output

RF Gain 63 dB

Gain Flatness ±0.5 dB (Max.)

Gain Va riation over Temperature ±0.5 dB (Max.)

Intermodulation Distortion -62 dBc (Max.)

Harmonics -13 dBm (Max.) 1 MHz Bandwidth; -50 dBc (Max.)

Out of Band Spurious -60 dBc (Max) ITU-R, SM329-9, Category A

Input Return Loss 14 dB (Min.)

Output Return Loss 16 dB (Min.)

150 W (Min.) with any combination of EDGE, GSM, W-DCDMA. Max.
four EDGE, Max eight GSM/EDGE and MAX two W-CDMA signals
130 W (Min.) with eight CDMA signals

Input Voltage Range +26 VDC to 28 VDC nominal; Operational range of 21 VDC to 30

DC Current
(Max @ APC)
(Nominal)

Efficiency >17%

VDC.
MCPA disables at less than 20.5 VDC or greater than+30.5 VDC

36 Amps at 26 V and 160 W average RF power output.

34.8 Amps at 27 V and 160 W average RF power output

044-05236 Rev A 5-1

Multi-Carrier Power Amplifier Specifications G3L-850-160 MCPA

Table 5-1 MCPA Specifications (Continued)

Mechanical Specifications/Features

Controls Three position toggle switch: OFF/ON/RESET

Alarm Indication LED; Green (normal), Yellow (minor alarm), Red (Major alarm)

Platform Compatibility Everest Power Amplifier (PA) will reduce power level to Harley/Python

RF Input / Output / Status / Alarm /
Control / DC Input Connector

DImensions 354.6 mm high, 99 mm wide, 499.9 mm deep (including handles)

Weight 12.97 kg (28.5 lbs)

Environmental Specifications/Features

Operating Temperature Range -33 ºC. to +50 ºC

Storage Temperature -40 ºC. to +70 ºC

Operating Humidity, Normal 5% to 95% relative humidity (non-condensing)

Storage Humidity 5% to 95% relative humidity (non-condensing)

APC levels if placed in a Harley/Python subrack. PA will perform at
rated power levels with Software upgrade for subrack

21-pin D-subminiature combo connector

(13.96” H X 3.9” W X 19.7” D)

5-2 044-05236 Rev A

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