PowerWave G3L-800-25-001, Installation & Service Manual

Page 1: ...SERVICE MANUAL MULTICHANNEL POWER AMPLIFIER G3L 800 25 001 869 894 MHz 25 WATTS AVERAGE POWER 15 JANUARY 1999 Powerwave Technologies Inc Tel 949 757 0530 2026 McGaw Avenue Fax 949 757 0941 Irvine CA 92614 Web Site www powerwave com ...

Page 2: ...arm Control and RF Connector 2 2 2 6 Amplifier Module RS 232 Connector 2 4 Section 3 Operating Instructions 3 1 Introduction 3 1 3 2 Initial Start Up and Operating Procedures 3 1 Section 4 Principles of Operation 4 1 Introduction 4 1 4 2 RF Input Signal 4 1 4 3 RF Output Load 4 1 4 4 Amplifier Functional Description 4 1 4 4 1 Predriver Amplifier 4 1 4 4 2 Three Stage Driver Amplifier 4 1 4 4 3 Mai...

Page 3: ...o 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 Pag...

Page 4: ...4 5 3 Multichannel Power Amplifier Test Data Sheet 5 4 6 1 Troubleshooting 6 1 ...

Page 5: ... 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 ...

Page 6: ...ale D sub RF Output Connector 21WA4 male D sub Phase 180 5 degrees measured at 880 MHz 25 ºC any power level Phase Tracking 10 degrees from 25 ºC across specified temperature range IMD 60 dBc 8 carriers continuous phase random equal carrier spacing of 1 25 MHz Any power up to maximum average output power Output Return Loss 18 dB at any power level Harmonic Output 45 dBc at any number of carriers a...

Page 7: ...7 Figure 1 1 G3L 800 25 001 Amplifier Showing Front Panel 15 57 2 64 13 82 MINOR MAJOR ...

Page 8: ...8 Figure 1 2 G3L 800 25 001 Amplifier Showing Rear Panel 21WA4 Male D Sub Connector 21WA4 D Sub Connector ...

Page 9: ... 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 ...

Page 10: ...imary power and negative primary power to the subrack Tighten the subrack power connections 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 ...

Page 11: ...R A HIGH FLOAT FOR A LOW 8 RACK A0 ADDRESS IN LSB GROUND PIN FOR A HIGH FLOAT FOR A LOW 9 NOT USED 10 AMP A2 ADDRESS IN MSB GROUND PIN FOR A LOW FLOAT FOR A HIGH 11 FAN FAIL INPUT GROUND PIN FOR A LOW FLOAT FOR A HIGH 12 AMP A1 ADDRESS IN MiddleSB GROUND PIN FOR A LOW PASS FLOAT FOR A HIGH FAIL 13 NOT USED 14 AMP A0 ADDRESS IN LSB GROUND PIN FOR A LOW FLOAT FOR A HIGH 15 NOT USED 16 NOT USED 17 NO...

Page 12: ...TRODUCTION 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 th...

Page 13: ...e 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 con...

Page 14: ...roximately 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 ...

Page 15: ...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 a...

Page 16: ...le 5 1 Table 5 1 also lists the intervals at which the tasks should be performed Table 5 1 Periodic Maintenance TASK INTERVAL ACTION Inspection Cables and Connectors 12 Months I In ns sp pe ec ct t s si ig gn na al l a an nd d p po ow we er r c ca ab bl le es s f fo or r f fr ra ay ye ed d i in ns su ul la at ti io on n C Ch he ec ck k R RF F c co on nn ne ec ct to or rs s t to o b be e s su ur re...

Page 17: ...n 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 amplifie...

Page 18: ...18 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 ...

Page 19: ...ce Impedance 50 Ohms VSWR 1 2 1 Supply Voltage 27 Vdc 0 1 Vdc TEST SPECIFICATION MIN MAX DATA RF Gain Vcc 27 Vdc PO 25 W Freq 880 MHz Table 1 1 0 5 dB Table 1 1 0 5 dB Spurious Emissions Vcc 27 Vdc PO 25 W 869 894 MHz Band 60 dBc Gain Flatness Vcc 27 Vdc PO 25 W 869 894 MHz Band 0 5 dB Input Return Loss Vcc 27 Vdc PO 25 W 869 894 MHz Band 12 dB PASS FAIL Tested by ...

Page 20: ...er to pull module out of subrack 4 Install replacement in reverse order of steps 1 through 3 above 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 furth...

Page 21: ...g 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 reu...