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Summary of Contents for PowerWave G3L-800-25-001
- Page 1 ® INSTALLATION & 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 044-05058 Rev. A...
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Page 2: Table Of Contents
TABLE OF CONTENTS Par. Section 1 Page General Description Introduction .....................1-1 General Description ................1-1 Functional and Physical Specifications ...........1-1 Section 2 Installation 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... - Page 3 G3L-800-25-001 Amplifier Showing Rear Panel ........1-4 Power, Alarm, Control, and RF Connector (D-Subminiature 21WA4, Male Connector) ......................2-3 RS-232 Connector (on Rear of G3L-800-25-001 Module) ......2-4 G3L-800-25-001 Multi Channel Power Amplifier Functional Block Diagram G3L-800-25-001 Amplifier Test Setup Diagram ........5-3 LIST OF TABLES...
- Page 4 Multichannel Power Amplifier Test Data Sheet ........5-4 Troubleshooting ..................6-1...
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Page 5: General Description No
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;... - Page 6 Table 1-1. G3L-800-25-001 Multichannel Power Amplifier Functional Specifications Frequency Range 869-894 MHz (25 MHz Bandwidth) Maximum Average Input Power -13 dBm Continuous Average Output Power 25 Watts Spurious Emissions -60 dBc maximum (820 MHz – 900 MHz) -50 dBc maximum (all other frequencies) RF Gain 57±0.5 dB...
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Page 7: G3L-800-25-001 Amplifier Showing Front Panel
13.82 MINOR MAJOR 15.57 2.64 Figure 1-1. G3L-800-25-001 Amplifier Showing Front Panel... -
Page 8: G3L-800-25-001 Amplifier Showing Rear Panel
Figure 1-2. G3L-800-25-001 Amplifier Showing Rear Panel 21WA4 Male D-Sub Connector 21WA4 D-Sub Connector... -
Page 9: Introduction
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. -
Page 10: Installation Instructions
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. -
Page 11: Power, Alarm, Control, And Rf Connector (D-Subminiature 21Wa4, Male Connector)
SIGNAL SIGNAL NAME GROUND RxD+ DATA IN SERIAL-RS485 RxD- DATA IN SERIAL-RS485 TxD+ DATA OUT SERIAL-RS485 TxD- DATA OUT SERIAL-RS485 RACK A2 ADDRESS IN (MSB) GROUND PIN FOR A HIGH,FLOAT FOR A LOW RACK A1 ADDRESS IN (MiddleSB) GROUND PIN FOR A HIGH,FLOAT FOR A LOW RACK A0 ADDRESS IN (LSB) GROUND PIN FOR A HIGH,FLOAT FOR A LOW... -
Page 12: Amplifier Module Rs-232 Connector
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) DESCRIPTION NUMBER RS-232 Rx... -
Page 13: Principles Of Operation
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. -
Page 14: 4-4.1 Predriver Amplifier
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. -
Page 15: 4-4.3 Main Amplifier
Control 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. -
Page 16: Periodic Maintenance
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. -
Page 17: Performance Test
AWG2021 Network Analyzer H.P. 8753C Current Probe Source Diskette Powerwave CDMA Generator 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. - Page 18 INPUT RETURN LOSS TEST: 6. Read and record the S 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 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 DATA RF Gain Vcc = 27 Vdc Table 1-1 Table 1-1 PO = 25 W -0.5 dB...
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Page 20: Field Replacement Of The Module
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. -
Page 21: Return For Service Procedures
3. Verify that unit does not have a major fault (red LED on front panel). Recycle power. 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.
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