Powerwave Technologies 5JS0034 CELLULAR AMPLIFIER User Manual USERS MANUAL

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Document ID	25171
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Document Description	USERS MANUAL
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	9.27kB (115928 bits)
Date Submitted	1999-03-01 00:00:00
Date Available	1999-05-19 00:00:00
Creation Date	2001-07-03 13:41:11
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-07-03 13:41:16
Document Title	USERS MANUAL

®
INSTALLATION & SERVICE
MANUAL
MULTICHANNEL
POWER AMPLIFIER
G3L-800-25-001
869-894 MHz
25 WATTS AVERAGE POWER
15 JANUARY 1999
Powerwave Technologies, Inc.
2026 McGaw Avenue
Irvine, CA 92614
044-05058 Rev. A
Tel: 949-757-0530
Fax: 949-757-0941
Web Site: www.powerwave.com
TABLE OF CONTENTS
Par.
No.
1-1
1-2
1-3
Section 1
General Description
Page
No.
Introduction .............................................................................................1-1
General Description ...............................................................................1-1
Functional and Physical Specifications ...................................................1-1
Section 2
Installation
2-1
2-2
2-3
2-4
2-5
2-6
Introduction .............................................................................................2-1
Electrical Service Recommendations......................................................2-1
Unpacking and Inspection.......................................................................2-1
Installation Instructions............................................................................2-2
Amplifier Module Power, Alarm, Control, and RF Connector ..................2-2
Amplifier Module RS-232 Connector.......................................................2-4
Section 3
Operating Instructions
3-1
3-2
Introduction .............................................................................................3-1
Initial Start-Up and Operating Procedures ..............................................3-1
Section 4
Principles of Operation
4-1
4-2
4-3
4-4
4-4.1
4-4.2
4-4.3
4-4.4
4-4.5
4-5
4-6
Introduction .............................................................................................4-1
RF Input Signal .......................................................................................4-1
RF Output Load.......................................................................................4-1
Amplifier Functional Description..............................................................4-1
Predriver Amplifier...................................................................................4-1
Three Stage Driver Amplifier ...................................................................4-1
Main Amplifier .........................................................................................4-2
Alarm Monitoring and Control..................................................................4-2
Loop Control Circuit ................................................................................4-2
Amplifier Module Cooling ........................................................................4-2
Power Distribution ...................................................................................4-2
TABLE OF CONTENTS (Continued)
Par.
No.
5-1
5-2
5-3
5-4
5-4.1
5-5
Section 5
Maintenance
Page
No.
Introduction .............................................................................................5-1
Periodic Maintenance..............................................................................5-1
Test Equipment Required For Test .........................................................5-1
Performance Test....................................................................................5-2
Amplifier Performance Test.....................................................................5-2
Field Replacement of the Module ...........................................................5-7
Section 6
Troubleshooting
6-1
6-2
6-3
6-3.1
6-3.2
Introduction .............................................................................................6-1
Troubleshooting ......................................................................................6-1
Return for Service Procedures ................................................................6-1
Obtaining an RMA...................................................................................6-1
Repackaging for Shipment......................................................................6-1
LIST OF ILLUSTRATIONS
Figure
Page
No.
No.
1-1
G3L-800-25-001 Amplifier Showing Front Panel.....................................1-3
1-2
G3L-800-25-001 Amplifier Showing Rear Panel .....................................1-4
2-1
Power, Alarm, Control, and RF Connector (D-Subminiature 21WA4, Male
Connector) .........................................................................................................2-3
2-2
RS-232 Connector (on Rear of G3L-800-25-001 Module) ......................2-4
4-1
G3L-800-25-001 Multi Channel Power Amplifier Functional Block Diagram
4-2
5-1
G3L-800-25-001 Amplifier Test Setup Diagram ......................................5-3
LIST OF TABLES
Table
No.
1-1
2-1
2-2
5-1
5-2
Page
No.
G3L-800-25-001 Multichannel Power Amplifier Functional Specifications1-2
Amplifier Module Power, Alarm, Control, and RF Connector Definition ..2-3
Amplifier Module RS-232 Connector Definition.......................................2-4
Periodic Maintenance..............................................................................5-1
Test Equipment Required .......................................................................5-2
5-3
6-1
Multichannel Power Amplifier Test Data Sheet .......................................5-4
Troubleshooting ......................................................................................6-1
Section
GENERAL DESCRIPTION
1-1. INTRODUCTION
This manual contains information and procedures for installation, operation, and
maintenance of Powerwave’s model G3L-800-25-001 multichannel power
amplifier. The manual is organized into six sections as follows:
Section 1. General Description
Section 2. Installation
Section 3. Operating Instructions
Section 4. Principles of Operation
Section 5. Maintenance
Section 6: Troubleshooting
1-2. GENERAL DESCRIPTION
The G3L-800-25-001 (see figures 1-1 and 1-2) is a linear, multichannel power
amplifier that operates in the 25 MHz frequency band from 869 MHz to 894 MHz.
It is designed as a self-contained module with EMI containment for use in both
indoor and outdoor North American cellular base stations. The G3L-800-25-001
accepts single channel and transmit voice RF signals. The G3L-800-25-001 uses
an internally generated tone to optimize its performance. The system operating
band (A or B) is externally provided to the G3L-800-25-001 so that it knows where
the tone frequency is going to be. If the operating band is A, then a tone at B
band is generated; if the operating band is B, then a tone at A band is generated.
Each amplifier module has a power, alarm, and control connector that allows the
host system to monitor the amplifier module performance. Primary power for the
amplifier is +27 Vdc.
1-3. FUNCTIONAL AND PHYSICAL SPECIFICATIONS
Functional and physical specifications for the amplifier are listed in table 1-1.
Table 1-1. G3L-800-25-001 Multichannel Power Amplifier Functional Specifications
Frequency Range
Maximum Average Input Power
Continuous Average Output Power
Spurious Emissions
RF Gain
Gain Flatness:
Gain Variation
(Temperature and Voltage)
Output Protection:
Input Port Return Loss:
Operating Temperature:
Storage Temperature:
Operating Humidity:
Storage Humidity:
DC Input, Alarm, and Control
Connector:
RF Input Connector:
RF Output Connector:
Phase
Phase Tracking
IMD
Output Return Loss
Harmonic Output
Communications
Status Indicators: POWER ON:
MINOR:
MAJOR:
Internally Generated Alarms
Externally Generated Alarms
Hot Swap Capable
DC Input Power:
Power Supply Current
Overload Protection
Dimensions (inches):
869-894 MHz (25 MHz Bandwidth)
-13 dBm
25 Watts
-60 dBc maximum (820 MHz – 900 MHz)
-50 dBc maximum (all other frequencies)
57±0.5 dB
±0.5 dB (869 MHz – 894 MHz)
±0.7dB (From 25 ºC, across specified temperature range.)
±0.7dB (From 27 V, across specified voltage range.)
Mismatch Protected
-12 dB at any given power level
0 ºC. to +50 ºC. (room ambient)
-40 ºC. to +65 ºC. (room ambient)
5% - 95% Relative Humidity (noncondensing) not to exceed
0.024 grams of water per gram of dry air.
5% - 95% Relative Humidity (noncondensing)
21WA4 (male, D-sub)
21WA4 (male, D-sub)
21WA4 (male, D-sub)
180±5 degrees (measured at 880 MHz, 25 ºC, any power level)
±10 degrees (from 25 ºC, across specified temperature range)
-60 dBc (8 carriers, continuous phase random, equal carrier
spacing of 1.25 MHz. Any power up to maximum average output
power.)
-18 dB (at any power level)
-45 dBc (at any number of carriers, any power level.)
RS-485 interface for control and status
Green LED = Power applied
Yellow LED = Minor alarm (loop failure)
Red LED
= Major alarm (module failure and shut down)
Over temp., DC over voltage, Overpower, VSWR, Loop fail.
Fan failure: Open collector pulled low = amp functioning
Open collector floating high = amp failure
Unit is capable of being replaced without shutting down power.
+27±0.1 Vdc, 260 mV p-p max. ripple, ≤350 watts
15 amps max. (at max. RF power out)
20 A (circuit breaker / on-off switch)
Height: 13.82; width: 2.64; depth: 15.57
13.82
MINOR
MAJOR
15.57
2.64
Figure 1-1. G3L-800-25-001 Amplifier Showing Front Panel
Figure 1-2. G3L-800-25-001 Amplifier Showing Rear Panel
21WA4 Male D-Sub Connector
21WA4 D-Sub Connector
Section
INSTALLATION
2-1. INTRODUCTION
This section contains unpacking, inspection, and installation instructions and recommendations for
the Model G3L-800-25-001 Multichannel Power Amplifier. Carefully read all material in this section
prior to equipment unpacking or installation. Also read and review the operating procedures in
Section 3 prior to installing the equipment. It is important that the licensee perform these tasks
correctly and in good faith. If applicable, carefully read Parts 73 and 74 of the Federal
Communications Commission (FCC) rules to determine how they apply to your installation. DON'T
TAKE CHANCES WITH YOUR LICENSE.
2-2. ELECTRICAL SERVICE RECOMMENDATIONS
Powerwave Technologies recommends that proper AC line conditioning and surge suppression be
provided on the primary AC input to the +27 Vdc power source. All electrical service should be
installed in accordance with the National Electrical Code, any applicable state or local codes, and
good engineering practice. Special consideration should be given to lightning protection of all
systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors are
recommended in the service entrance. Straight, short ground runs are recommended. The
electrical service must be well grounded.
Each amplifier system should have its own circuit breaker, so a failure in one does not shut off the
whole installation. Circuit breakers should be thermal type, capable of handling the anticipated
inrush current, in a load center with a master switch.
2-3. UNPACKING AND INSPECTION
This equipment has been operated, tested and calibrated at the factory. Carefully open the
container(s) and remove the amplifier module(s). Retain all packing material that can be
reassembled in the event that the unit must be returned to the factory.
CAUTION
Exercise care in handling equipment
during inspection to prevent damage
caused by rough or careless handling.
Visually inspect the amplifier module 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 the connector. If the equipment is damaged, a claim should be filed with the carrier
once the extent of any damage is assessed. We cannot stress too strongly the importance of
IMMEDIATE careful inspection of the equipment and the subsequent IMMEDIATE filing of the
necessary claims against the carrier if necessary. If possible, inspect the equipment in the
presence of the delivery person. If the equipment is damaged, the carrier is your first area of
recourse. If the equipment is damaged and must be returned to the factory, write or phone for a
return authorization. Powerwave may not accept returns without a return authorization. Claims for
loss or damage may not be withheld from any payment to Powerwave, nor may any payment due
be withheld pending the outcome thereof.
WE CANNOT GUARANTEE THE FREIGHT
CARRIER'S PERFORMANCE
2-4. INSTALLATION INSTRUCTIONS
The G3L-800-25-001 amplifier module is designed for installation in a subrack that permits access
to the subrack for connection of DC power, RF, and monitor cables.
To install the amplifier proceed as follows:
1. Install subrack in equipment rack or cabinet and secure in place.
2. Connect antenna cable to subrack.
3. Connect the transceiver output(s) to subrack.
4. Connect RS-232 cable to subrack.
5. Connect alarm and control cables to subrack.
WARNING
Verify that all circuit breaker switches on the subrack
are in the OFF position. Turn off external primary DC
power before connecting DC power cables.
7. Connect positive primary power and negative primary power to the subrack.
subrack power connections.
Tighten the
8. Place power on/off switch on the amplifier front panel in the “off” (down) position. Insert the
plug-in amplifier module(s) in the subrack. Tighten top and bottom thumbscrews.
9. Check your work before applying DC voltage to the system. Make certain all connections are
tight and correct.
10. Measure primary DC input voltage. DC input voltage should be +27 Vdc ±1.0 Vdc. If the DC
input voltage is above or below the limits, call and consult Powerwave before you turn on your
amplifier system.
11. Refer to section 3 for initial turn-on and checkout procedures.
2-5. AMPLIFIER MODULE POWER, ALARM, CONTROL, AND RF CONNECTOR
The power, alarm, control, and RF connections on the amplifier are made through a 21WA4 male
connector (figure 2-1) and are listed and described in table 2-1.
10
Table 2-1. Amplifier Module Power, Alarm, Control, and RF Connector Definition
PIN
10
11
SIGNAL
GROUND
RxD+
RxDTxD+
TxDRACK A2
RACK A1
RACK A0
I/O
DATA IN
DATA IN
DATA OUT
DATA OUT
ADDRESS IN (MSB)
ADDRESS IN (MiddleSB)
ADDRESS IN (LSB)
AMP A2
FAN FAIL
ADDRESS IN (MSB)
INPUT
12
AMP A1
ADDRESS IN (MiddleSB)
AMP A0
ADDRESS IN (LSB)
13
14
15
16
17
A1
A2
A3
A4
RF INPUT
Vin
GROUND
RF
OUTPUT
SOURCE
SIGNAL NAME
SERIAL-RS485
SERIAL-RS485
SERIAL-RS485
SERIAL-RS485
GROUND PIN FOR A HIGH,FLOAT FOR A LOW
GROUND PIN FOR A HIGH,FLOAT FOR A LOW
GROUND PIN FOR A HIGH,FLOAT FOR A LOW
NOT USED
GROUND PIN FOR A LOW,FLOAT FOR A HIGH
GROUND PIN FOR A LOW,FLOAT FOR A HIGH
GROUND PIN FOR A LOW(PASS),FLOAT FOR A
HIGH(FAIL)
NOT USED
GROUND PIN FOR A LOW,FLOAT FOR A HIGH
NOT USED
NOT USED
NOT USED
PDM 24 SERIES COAX
TYPICALLY 27 VOLTS DC
POWER SUPPLY RETURN
PKZ 26 SERIES COAXIAL CONNECTOR (50 OHM,
.050” CENTER CONTACT)
Figure 2-1. Power, Alarm, Control, and RF Connector (D-SubMiniature 21WA4, Male Connector)
11
2-6. AMPLIFIER MODULE RS-232 CONNECTOR
The RS-232 connection on the amplifier is made through a 4-pin male Molex connector (figure 2-2).
The connector is defined in table 2-2.
Figure 2-2. RS-232 Connector (on Rear of G3L-800-25-001 Module)
Table 2-2. Amplifier Module RS-232 Connector Definition
PIN
NUMBER
DESCRIPTION
RS-232 Rx
RS-232 Tx
Summary Alarm
Ground
Section
OPERATING INSTRUCTIONS
3-1. INTRODUCTION
This section contains operating instructions for the Multicarrier Amplifier.
3-2. INITIAL START-UP AND OPERATING PROCEDURES
To perform the initial start-up, proceed as follows:
1. Double check to ensure that all input and output cables are properly connected.
CAUTION
Before applying power, make sure that the input and output of the
amplifier are properly terminated at 50 ohms. Do not operate the
amplifier without a load attached. Refer to table 1-1 for input power
requirements. Excessive input power may damage the amplifier
NOTE
The output coaxial cable between the amplifier and the antenna must
be 50 ohm coaxial cable. Use of any other cable will distort the output.
12
2. Turn on supply that provides +27 Vdc to the amplifier system.
3. Place power on/off switch on the amplifier front panel in the “on” (up) position.
4. Turn on external exciter/transceiver and apply RF input signals.
Section
PRINCIPLES OF OPERATION
4-1. INTRODUCTION
This section contains a functional description of the G3L-800-25-100 Multichannel
Power Amplifier.
4-2. RF INPUT SIGNAL
The maximum input power should not exceed the limits specified in table 1-1.
4-3. RF OUTPUT LOAD
The load impedance should be as good as possible (1.5:1 or better) in the working
band for good power transfer to the load.
4-4. AMPLIFIER FUNCTIONAL DESCRIPTION
The G3L-800-25-001 amplifier (figures 1-1, 1-2, and 4-1) is a linear, multichannel
power amplifier that operates in the 25 MHz frequency band from 869 MHz to 894
MHz at an output power of 25 watts. Each amplifier is a self-contained module
and is functionally independent of any other amplifier modules in the system.
Each amplifier module has an alarm board that monitors the amplifier
performance. If a failure or fault occurs in an amplifier module, it is transmitted to
the host system via the D-subminiature 21Wa4 connector at the rear of the
module.
The amplifier is compliant to the requirements of FCC Part 22 and TIA/EIA IS97A
with respect to spurious emissions. Constant gain is maintained by continuously
comparing active paths with passive references, and correcting for small
variations through the RF feedback controls. All gain variations, for example
those due to temperature, are reduced to the passive reference variations. The
amplifier module is comprised of:
A preamp
A driver amplifier
A main amplifier
An error and preerror amplifier
13
Alarm monitoring and control
4-4.1. PREDRIVER AMPLIFIER
The input of the amplifier employs two stages of class AB amplification which
provide approximately 13.5 dB of gain in the 25 MHz frequency band from 869
MHz to 894 MHz. The amplifier operates on +27 Vdc.
4-4.2. THREE STAGE DRIVER AMPLIFIER
The input of the amplifier employs three stages of class AB amplification which
provide approximately 32 dB of gain in the 25 MHz frequency band from 869 MHz
to 894 MHz. The amplifier operates on +27 Vdc.
14
4-4.3. MAIN AMPLIFIER
The main amplifier employs class AB amplification for maximum efficiency. The
signal provides approximately 11 dB of gain in the 25 MHz frequency band. The
output from the main amplifier is typically 30 watts. The amplifier operates on +27
Vdc, and a bias voltage of +5 Vdc, and is mounted directly on a heat sink. The
alarm logic controls the +5 Vdc bias voltage that shuts down the amplifier.
Predriver
RF
IN
13.5 dB
Gain
Three Stage
Driver
32 dB
Gain
Main Amp
11 dB
Gain
Control
RF
OUT
Control
LOOP CONTROL CIRCUIT
ALARM CIRCUIT
Figure 4-1. G3L-800-25-001 Multichannel Power Amplifier Functional Block
Diagram
4-4.4. ALARM MONITORING AND CONTROL
In the amplifier, all normal variations are automatically compensated for by the
loop control circuit. However, when large variations occur beyond the adjustment
range of the loop control, a loop fault will occur. The alarms are output via a
21WA4 D-sub connector on the module for subsequent remote monitoring.
4-4.5. LOOP CONTROL CIRCUIT
The primary function of the loop control circuit is to reduce the spurious emissions
of the RF signal at all amplifier stages. The loop control circuit controls internal
amplifier parameters of all amplifier stages, thereby optimizing spurious
emissions.
4-5. AMPLIFIER MODULE COOLING
Each amplifier module is contained within a thermally conductive finned chassis
which, when properly cooled with external fans, will provide sufficient cooling to
maintain the amplifier within the specified operating temperature range.
4-6. POWER DISTRIBUTION
15
Primary DC power for the amplifier is provided by the host system. The amplifier
module has a DC/DC converter that converts the +27 Vdc to +15 Vdc, +5 Vdc,
and +8 Vdc for internal use.
Section
MAINTENANCE
5-1. INTRODUCTION
This section contains periodic maintenance and performance test procedures for the Multichannel
Power Amplifier. It also contains a list of test equipment required to perform the identified tasks.
NOTE
Check your sales order and equipment
warranty before attempting to service or
repair the unit. Do not break the 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 the factory.
5-2. PERIODIC MAINTENANCE
Periodic maintenance requirements are listed in Table 5-1. Table 5-1 also lists the intervals at
which the tasks should be performed.
Table 5-1. Periodic Maintenance
TASK
Inspection
Cables and
Connectors
Performance Tests
INTERVAL
12 Months
12 Months
ACTION
Inspect signal and power cables
for frayed insulation. Check RF
connectors to be sure that they
are tight.
Perform annual test per
paragraph 5-5.
5-3. TEST EQUIPMENT REQUIRED FOR TEST
Test equipment required to test the amplifier is listed in Table 5-2. Equivalent test equipment may
be substituted for any item, keeping in mind that a thermistor type power meter is required.
NOTE
All RF test equipment must be calibrated to 0.05
dB resolution. Any deviation from the nominal
attenuation must be accounted for and factored
into all output readings.
16
Table 5-2. Test Equipment Required
MANUFACTURER
MODEL
MENCLATURE
Signal Generator
20 dB Attenuator, 250 Watt
20 dB Attenuator, 20 Watt (2 each)
Spectrum Analyzer
Coax Directional Coupler
Power Meter / Sensor
Arbitrary Waveform Generator
Network Analyzer
Current Probe
Source Diskette
CDMA Generator
H.P.
Tenuline
Tenuline
H.P.
H.P.
H.P.
Sony
H.P.
8656B
8560E
778D
437B / 8481A
AWG2021
8753C
Powerwave
Noise Com
800-1
5-4. PERFORMANCE TEST
Performance testing should be conducted every 12 months to ensure that the amplifier system
meets the operational specifications listed in table 5-3. Also verify system performance after any
amplifier module is replaced in the field. The test equipment required to perform the testing is listed
in table 5-2, and the test setup is shown in figure 5-1.
NOTE
The frequencies used in this test are typical for an amplifier with a
25 MHz band from 869 MHz to 894 MHz. Select evenly spaced
F1, F2, F3, and F4 frequencies that cover the instantaneous
bandwidth of your system.
5-4.1. AMPLIFIER PERFORMANCE TEST.
To perform the test, proceed as follows:
1. Connect test equipment as shown in figure 5-1.
NOTE
Do not apply any RF signals at this time.
AMPLIFIER SPURIOUS EMISSIONS TEST:
2. With the RF input signal to the amplifier set to be as shown in figure 5-2, use the spectrum
analyzer to measure the spurious emissions performance. Record test data in table 5-3.
Verify that it is within the specifications shown in table 1-1. Switch tested amplifier to OFF.
GAIN TEST:
3. Disconnect spectrum analyzer from test setup, and connect the network analyzer.
4. Set network analyzer as follows:
a. Power output to -13 dBm.
b. Frequency start to 869 MHz.
c. Frequency stop to 894 MHz.
d. Normalize the network analyzer for gain and return loss.
5. Check the amplifier gain across the band from 869 MHz to 894 MHz. Gain should be as
specified in table 1-1. Record test data in table 5-3.
17
INPUT RETURN LOSS TEST:
6. Read and record the S11 return loss measurement on network analyzer. Record test data in
table 5-3.
Figure 5-1. G3L-800-25-001 Amplifier Test Setup Diagram
18
Table 5-3. Multichannel Power Amplifier Test Data Sheet
DATE__________________________________
MODULE S/N ___________________________
TEST CONDITIONS:
Load and Source Impedance: 50 Ohms
VSWR: < 1.2:1
Supply Voltage: +27 Vdc ±0.1 Vdc
TEST
SPECIFICATION
MIN
MAX
DATA
RF Gain
Spurious
Emissions
Gain Flatness
Input Return
Loss
PASS
Vcc = 27 Vdc
PO = 25 W
Freq. = 880 MHz
Vcc = 27 Vdc
PO =25 W
869 - 894 MHz Band
Vcc = 27 Vdc
PO =25 W
869 - 894 MHz Band
Vcc = 27 Vdc
PO = 25 W
869-894 MHz Band
Table 1-1
-0.5 dB
Table 1-1
+0.5 dB
-60 dBc
±0.5 dB
-12 dB
FAIL
Tested by
19
5-5. FIELD REPLACEMENT OF THE MODULE
The G3L-800-25-001 multichannel power amplifier module can be replaced in the field on site by a
qualified technician with experience maintaining RF power amplifiers and similar equipment:
To replace a power amplifier module, proceed as follows:
1. Set on/off switch on the front panel of the amplifier module to OFF (down).
2. Loosen two thumbscrews that secure amplifier module to subrack.
CAUTION
When removing the amplifier from the subrack, it is very important
to support the amplifier such that the rear of the module does not
suddenly drop when the guide rail disengages from the track. A
drop such as this could damage the rear 21WA4 multipin
connector.
3. With steady even pressure, use handle on front of amplifier to pull module out of
subrack.
4. Install replacement in reverse order of steps 1 through 3 above.
Section
TROUBLESHOOTING
6-1
INTRODUCTION
This section contains a list of problems which users have encountered and a few suggested actions
that may correct the problem. If the suggested corrective action does not eliminate the problem,
please contact your Powerwave field representative or the factory for further instructions.
NOTE
Check your sales order and equipment
warranty before attempting to service or
repair the unit. Do not break the 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 the factory.
6-2
TROUBLESHOOTING
Refer to table 6-1 for troubleshooting suggestions.
Table 6-1. Troubleshooting.
SYMPTOM
SUGGESTED ACTION
G3L-800-25-001 Inoperative
1. Check for proper power supply voltage.
2. Verify all RF connections.
20
3. Verify that unit does not have a major fault (red LED on
front panel). Recycle power.
6-3
RETURN FOR SERVICE PROCEDURES
When returning products to Powerwave, the following procedures will ensure optimum response.
6-3.1
Obtaining an RMA
A Return Material Authorization (RMA) number must be obtained prior to returning
equipment to the factory for service. Please contact our Customer Service Department at
(949) 757-0530 to obtain this number. Failure to obtain this RMA number may result in
considerable delays in receiving repair service.
6-3.2
Repackaging for Shipment
To ensure safe shipment of the amplifier, it is recommended that the package designed for
the amplifier be used. The original packaging material is reusable. If it is not available,
contact Powerwave’s Customer Service Department for packing materials and information.
21

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