Powerwave Technologies NTGS86AA Installation & Service Manual Download Page 4

4

Section

GENERAL DESCRIPTION

1-1.  INTRODUCTION

This manual contains information and procedures for installation, operation, and maintenance of
Powerwave’s model NTGS86AA single channel power amplifier (SCPA).  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 NTGS86AA is a linear, single-channel 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 an indoor and outdoor North American Cellular Base Stations.  Its flat base plate
allows for mounting on a flat thermal-absorbing surface to provide adequate heat dissipation,
thereby avoiding the use of any built-in fans.

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 +26 Vdc.

1-3.  FUNCTIONAL AND PHYSICAL SPECIFICATIONS

Functional and physical specifications for the amplifier are listed in table 1-1.

1

Summary of Contents for NTGS86AA

Page 1: ...CE MANUAL SINGLE CHANNEL POWER AMPLIFIER NTGS86AA 869 894 MHz 25 WATTS AVERAGE POWER 12 August 1998 Powerwave Technologies Inc Tel 949 757 0530 2026 McGaw Avenue Fax 949 757 0941 Irvine CA 92614 Web S...

Page 2: ...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 Loa...

Page 3: ...Connector 18 Pin Molex 2 2 2 2 RS485 Connector 2 3 4 1 NTGS86AA Single Channel Power Amplifier Functional Block Diagram 4 2 5 1 NTGS86AA Amplifier Test Setup Diagram 5 3 5 2 RF Input CDMA Source 5 3...

Page 4: ...el 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 an indoor and outdoor North America...

Page 5: ...15 dB for any 2 MHz band within frequency range Output Protection Mismatch Protected Input Port Return Loss VSWR 2 1 Max Out of Band Spurious Less than 14 dBm DC Input Power 26 0 5 Vdc 260 mV p p max...

Page 6: ...6 RF OUTPUT RF INPUT 18 PIN MOLEX CONNECTOR RF SAMPLE RS485 CONNECTOR 9 900 12 515 1 670 Figure 1 1 NTGS86AA Single Channel Power Amplifier...

Page 7: ...e whole installation Circuit breakers should be thermal type capable of handling the maximum anticipated inrush current in a load center with a master switch 2 3 UNPACKING AND INSPECTION This equipmen...

Page 8: ...connector WARNING Turn off external primary DC power before connecting cable to 18 pin Molex connector 5 Connect power alarm and control cable to 18 pin Molex connector 6 Check your work before apply...

Page 9: ...7 Ground GND 8 Ground GND 9 Ground GND 10 Anxiety output RS 422 level ANX 11 Enable input RS 422 level ENABLE 12 Enable input RS 422 level ENABLE 13 Alarm output RS 422 level ALARM 14 Alarm output RS...

Page 10: ...inated 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 betw...

Page 11: ...recting 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...

Page 12: ...eby optimizing the spurious emissions mask of the CDMA output signal 4 5 AMPLIFIER MODULE COOLING Each amplifier module is contained within a thermally conductive chassis which when properly mounted o...

Page 13: ...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...

Page 14: ...mplifier 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 t...

Page 15: ...15 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 NTGS86AA Amplifier Test Setup Diagram...

Page 16: ...urce Impedance 50 Ohms VSWR 1 2 1 Supply Voltage 26 Vdc 0 1 Vdc TEST SPECIFICATION MIN MAX DATA RF Gain Vcc 26 Vdc PO 25 W Freq 880 MHz Table 1 1 1 dB Table 1 1 1 dB Spurious Emissions Vcc 26 Vdc PO 2...

Page 17: ...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 warrant...

Page 18: ...ing 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 will result in considerable delays in re...

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