Powerwave Technologies NTGS86AA Supplemento
044-05045 Rev. A
INSTALLATION & SERVICE
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 Site: www.pwav.com
TABLE OF CONTENTS
®
2
Par. Section 1 Page
No. General Description No.
1-1 Introduction ............................................................................................ 1-1
1-2 General Description .............................................................................. 1-1
1-3 Functional and Physical Specifications .................................................. 1-1
Section 2
Installation
2-1 Introduction ............................................................................................ 2-1
2-2 Electrical Service Recommendations..................................................... 2-1
2-3 Unpacking and Inspection...................................................................... 2-1
2-4 Installation Instructions........................................................................... 2-2
2-5 Amplifier Module Power, Alarm, and Control Connector........................ 2-2
2-6 RS485 Connector................................................................................... 2-3
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 Main Amplifier ........................................................................................ 4-2
4-4.2 Amplifier Monitoring ............................................................................... 4-3
4-4.3 Amplifier Module Cooling ....................................................................... 4-3
4-5 Power Distribution .................................................................................. 4-3
Section 5
Maintenance
5-1 Introduction ............................................................................................ 5-1
5-2 Periodic Maintenance............................................................................. 5-1
5-3 Test Equipment Required For Test ........................................................ 5-1
5-4 Performance Test................................................................................... 5-2
5-4.1 Amplifier Performance Test.................................................................... 5-2
5-5 Field Replacement of the Module .......................................................... 5-7
3
TABLE OF CONTENTS (Continued)
Par. Section 6 Page
No. Troubleshooting No.
6-1 Introduction .............................................................................................6-1
6-2 Troubleshooting ......................................................................................6-1
6-3 Return for Service Procedures................................................................6-1
6-3.1 Obtaining an RMA...................................................................................6-1
6-3.2 Repackaging for Shipment......................................................................6-1
LIST OF ILLUSTRATIONS
Figure Page
No. No.
1-1 NTGS86AA Single Channel Power Amplifier ......................................... 1-3
2-1 Power, Alarm, and Control 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
LIST OF TABLES
Table Page
No. No.
1-1 NTGS86AA Single Channel Power Amplifier Functional Specifications.....
1-2
2-1 18-Pin Molex Alarm, Control, and Power Connections .......................... 2-3
2-2 RS485 Pin Definition.............................................................................. 2-3
5-1 Periodic Maintenance............................................................................. 5-1
5-2 Test Equipment Required ...................................................................... 5-2
5-3 Single Channel Power Amplifier Test Data Sheet.................................. 5-4
6-1 Troubleshooting ..................................................................................... 6-1
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
5
Table 1-1. NTGS86AA Single Channel 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 @ Maximum
Rated Output Power (44 dBm)
Frequency Requirement Meas. Bandwidth
750 kHz offset -46 dBc 30 kHz
1.23 MHz offset -61 dBc 30 kHz
1.5 MHz offset -61 dBc 30 kHz
1.98 MHz offset -61 dBc 30 kHz
RF Gain 43 ±2 dB
Gain Flatness: ±0.15 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. ripple, ≤350 watts
Operating Temperature: -15 ºC. to +85 ºC. (heatsink temperature)
Storage Temperature: -40 ºC. to +70 ºC.
Operating Humidity: 5 % - 95 % Relative Humidity (Noncondensing)
Storage Humidity: 5 % - 95 % Relative Humidity (Noncondensing)
DC Input, Alarm, and Control
Connector:
18-Pin Molex
RF Input Connector: SMA Female
RF Output Connector: SMA Female
RF Sample Connector: SMA Female (27±1 dB below RF Output)
Dimensions (inches): Width: 12.515; depth: 9.900; height: 1.670
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
7
Section
INSTALLATION
2-1. INTRODUCTION
This section contains unpacking, inspection, and installation instructions and recommendations for
the Model NTGS86AA Single Channel 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 +26 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 maximum
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
8
2-4. INSTALLATION INSTRUCTIONS (Refer to figure 1-1)
The NTGS86AA amplifier module is designed for installation on a heatsink that permits access to
the module for connection of RF cables and the power, alarm, and control connector.
To install the amplifier proceed as follows:
1. Install amplifier on heatsink with thermally conductive material inserted between amplifier
module and heatsink, and secure in place with four mounting screws.
2. Connect the antenna cable to RF OUT SMA connector.
3. Connect the transceiver output cable to RF IN SMA connector.
4. Connect coupled RF output monitor cable to RF SAMPLE SMA 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 applying DC voltage to the system. Make certain all connections are
tight and correct.
7. Measure primary DC input voltage. DC input voltage should be +26 ±0.5 Vdc. If the DC input
voltage is above or below the limits, call and consult Powerwave before you turn on your
amplifier system.
8. Refer to section 3 for initial turn-on and checkout procedures.
2-5. AMPLIFIER MODULE POWER, ALARM, AND CONTROL CONNECTOR
The power, alarm, and control connections on the amplifier are made through an 18-pin Molex
connector (figure 2-1) and are listed and described in table 2-1.
Figure 2-1. Power, Alarm, and Control Connector (18-Pin Molex)
9
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PIN SIGNAL DESCRIPTION SIGNAL NAME
1 Temperature Output (0-4.7 volts) TEMP_OUT
2 Reverse Power Detection (0-4.7 volts) REV_PWR
3 Forward Power Detection (0-4.7 volts) FWR_PWR
4 Ground GND
5NCNA
6−Anxiety output (RS 422 level) ANX (-)
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 422 level) ALARM (−)
15 +26 Vdc VDD
16 +26 Vdc VDD
17 +26 Vdc VDD
18 +26 Vdc VDD
2-6. RS485 CONNECTOR
The RS485 connector (figure 2-2) allows the user to monitor the status of the amplifier, download
new firmware, and revise the amplifier attributes. The pin connections are defined in table 2-2.
Figure 2-2. RS485 Connector
Table 2-2. RS485 Pin Definition
PIN FUNCTIO
N
1Rxd+
2Rxd−
3Txd−
4Txd+
14
10
OPERATING INSTRUCTIONS
3-1. INTRODUCTION
This section contains operating instructions for the Multicarrier Cellular Amplifier.
3-2. INITIAL START-UP AND OPERATING PROCEDURES
There are no operating controls or indicators on the NTGS86AA amplifier module. 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.
2. Turn on supply that provides +26 Vdc to the amplifier system.
3. Turn on external exciter/transceiver and apply RF input signals.
PRINCIPLES OF OPERATION
4-1. INTRODUCTION
This section contains a functional description of the Single Channel Power
Amplifier (SCPA).
4-2. RF INPUT SIGNAL
The maximum input power should not exceed the limits specified in table 1-1.
Section
3
Section
4
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