FCC ID: E675JS0047 Maple, Model NTGY71AB

INSTALLATION & SERVICE MANUAL MULTICHANNEL POWER AMPLIFIER NTGY71AA 869-894 MHz 70 WATTS AVERAGE POWER 20 September 2000 044-05080 Rev. A Powerwave Technologies, Inc. 2026 McGaw Avenue Irvine, CA 92614 Tel: 949-809-1100 Fax: 949-757-0941 Web Site: www.powerwave.com 2

GENERAL DESCRIPTION Section 1 1-1. INTRODUCTION This manual contains information and procedures for installation, operation, and maintenance of Powerwaves model NTGY71AA multichannel power amplifier (MCPA). 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 NTGY71AA is a linear, multichannel power amplifier that operates in the 25 MHz frequency band from 869 MHz to 894 MHz. It is designed to be mounted in an enclosure with EMI containment. Its flat base plate allows for mounting on a flat thermal-absorbing surface to provide adequate heat dissipation. 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. 044-05080 Rev. A 1-1 Table 1-1. NTGY71AA Multichannel Power Amplifier Functional Specifications Frequency Range Maximum Average Input Power Continuous Average Output Power Spurious Emissions @ Maximum Rated Output Power

(70 W / 48.5 dBm) Out of Band Spurious:

RF Gain Gain Flatness:

Output Protection:

Input Port Return Loss:

DC Input Power:

Operating Temperature:

Storage Temperature:

Operating Humidity:

Storage Humidity:

Interface Connectors:

RF Input --------------------------------------

RF Output------------------------------------

+26 Vdc Power and Ground-----------

Alarms and Sensing ---------------------

Differential IIC Clock, Rcv., Xmit. ----

IIC, Power, Alarms, Controls----------

IIC, RS485, Power, Other Signals --

Dimensions (inches):

869-894 MHz (25 MHz Bandwidth) 13 dBm 70 Watts Frequency Offset Requirement 0.750-1.5 MHz 1.5-1.98 MHz 1.98-3.125 MHz

>3.125 MHz

>3.13 MHz Frequency Meas. Bandwidth 30 kHz 30 kHz 30 kHz 100 kHz 30 kHz Meas. Bandwidth

(Max.)

-46 dBc

-61dBc

-61 dBc

-14 dBm

-20 dBm Requirement

(Max.)

-50dBm

-20dBm

-14dBm 30 kHz 100 kHz 100 kHz 824 - 849 MHz Second Harmonic(s) Outside 800 MHz 50 2 dB 0.2 dB for any 1.25-MHz band within frequency range. Mismatch Protected VSWR 2:1 Max.

+26 0.5 Vdc, 260 mV p-p max. ripple, 609 watts

-15 C. to +85 C. (heatsink temperature)

-40 C. to +85 C. 5 % - 95 % Relative Humidity (Noncondensing) 5 % - 95 % Relative Humidity (Noncondensing) SMA Female SMA Female 3W3 D-Sub (Connector P1) 14-Position Micro-Fit 3.0 (Connector P2) 6-Position Micro-Fit 3.0 (Connector P3) 26-Position High Density D-Sub (Connector P4) 18-Position Micro-Fit 3.0 (Connector P5) 11.00 x 14.50; height: 1.70 044-05080 Rev. A 1-2 044-05080 Rev. A 1-3 044-05080 Rev. A 1-4 044-05080 Rev. A 1-5

INSTALLATION Section 2 2-1. INTRODUCTION This section contains unpacking, inspection, and installation instructions and recommendations for the Model NTGY71AA 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 the appropriate parts 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 in handling equipment to prevent damage Exercise care during caused by rough or careless handling. inspection 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 044-05080 Rev. A 2-1 2-4. INSTALLATION INSTRUCTIONS (Refer to figure 1-1) The NTGY71AA 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 appropriate mounting screws. 2. Connect the antenna cable to RF OUT female SMA connector. 3. Connect the transceiver output cable to RF IN frmale SMA connector. WARNING Turn off external primary DC power before connecting any cables. 4. Connect power, alarm, and control cables to matching P1 through P5 connectors. Refer to paragraphs 2-5 through 2-9 following. 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. +26 VDC POWER AND GROUND CONNECTOR P1 The +26 Vdc power and ground connections on the amplifier are made through an 3-pin female D-

Sub connector (figure 2-1) and are listed and described in table 2-1. 3 2 1 Figure 2-1. +26 Vdc Power and Ground Connector P1 Table 2-1. +26 Vdc Power and Ground Connector P1 Definition PIN 1 2 3 SIGNAL

+26V

+26V_RTN DESCRIPTION

+26 Vdc for MCPA

+26 Vdc return, grounded to MCPA chassis ground. Chassis Gnd. Chassis Ground 044-05080 Rev. A 2-2 044-05080 Rev. A 2-3 2-6. ALARMS AND SENSING CONNECTOR P2 The alarms and sensing connections on the amplifier are made through a 14-pin micro-fit connector

(figure 2-2) and are listed and described in table 2-2. Figure 2-2. Alarms and Sensing Connector P2 Table 2-2. Alarms and Sensing Connector P2 Definition PIN 1 SIGNAL

+5V_AIM 2 3 4 5 6 7 8 9 10 11 12 13 14

+5V_AIM_RTN

+26V_ALARM

+15V_ALARM REMOTE_SENSE REMOTE_SENSE_RTN

+5V_ALARM NC 26ARTN ARTN

+26V_FAN

+26V_FAN_RTN

+26V_FAN

+26V_FAN_RTN DESCRIPTION 5-volt supply for the AIM; routed directly to the fan assembly / AIM connector 5-volt supply return for the AIM; routed directly to the fan assembly / AIM connector 26V HPCA alarm input 15V HPCA alarm input Remote sense for HPCA; connected directly to 26V supply Remote sense return for HPCA; connected directly to 26V supply return 5V HPCA alarm input Not connected 26V alarm return connected to 26V return on the MCPA 5V and 15V alarm return connected to 26V return on the MCPA 26V supply for the fans; routed to fan assembly / AIM connector 26V supply return for the fans; routed to fan assembly /

AIM connector 26V supply for the fans; routed to fan assembly /

AIM connector 26V supply return for the fans; routed to fan assembly /

AIM connector 044-05080 Rev. A 2-4 2-7. DIFFERENTIAL IIC CLOCK, RECEIVE, AND TRANSMIT CONNECTOR P3 The alarms and sensing connections on the amplifier are made through a 6-pin micro-fit connector

(figure 2-3) and are listed and described in table 2-3. Figure 2-3. Differential IIC Clock, Receive, and Transmit Connector P3 Table 2-3. Differential IIC Clock, Receive, and Transmit Connector P3 Definition PIN 1 2 3 4 SIGNAL IIC_CLK+

IIC_CLK-

IIC_RX_DATA+

IIC_RX_DATA-

DESCRIPTION Differential IIC Clock to the DPM Differential IIC Clock to the DPM Differential IIC Receive Data (from DPM) Differential IIC Receive Data (from DPM) 5 6 IIC_TX_DATA+

IIC_TX_DATA-

Differential IIC Transmit Data (to DPM) Differential IIC Transmit Data (to DPM) 2-8. IIC, POWER, ALARMS, AND CONTROLS CONNECTOR P4 The alarms and sensing connections on the amplifier are made through a 26-pin high density D-Sub connector (figure 2-4) and are listed and described in table 2-4. 044-05080 Rev. A 2-5 Figure 2-4. IIC, Power, Alarms, and Controls Connector P4 044-05080 Rev. A 2-6 Table 2-4. IIC, Power, Alarms, and Controls Connector P4 Definition PIN 1 SIGNAL

+26_FAN 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

+26_FAN_RTN FAN_ALARM1 FAN_ALARM2 FAN_ALARM3 AUX_ALARM+

AUX_ALARM-

AUX_CTRL1 AUX_CTRL2

+5V_AIM_RTN

+5V_AIM IIC_CLK+

IIC_CLK-

IIC_RX_DATA+

IIC_RX_DATA-

IIC_TX_DATA+

IIC_TX_DATA-

FORCE_ON+

FORCE_ON-

+26V_FAN

+26V_FAN_RTN 22-26 NC DESCRIPTION 26V supply to the fans; routed from 12-position HPCA connector 26V supply returnto the fans; routed from 12-position HPCA connector Alarm for one of three fans in fan assembly / AIM. Generated by the fan assembly / AIM and sent to the MFRM via the MCPAs RS485 link. Alarm for one of three fans in fan assembly / AIM. Generated by the fan assembly / AIM and sent to the MFRM via the MCPAs RS485 link. Alarm for one of three fans in fan assembly / AIM. Generated by the fan assembly / AIM and sent to the MFRM via the MCPAs RS485 link. Analog voltage signal that is generated from either an external power combiner or an intrusion alarm mechanism, passed to the MFRM through the RS485. Analog voltage signal that is generated from either an external power combiner or an intrusion alarm mechanism, passed to the MFRM through the RS485. Contact closure switch on the MCPA but controlled by the MFRM software. Default status is OPEN upon power up and CLOSED on power down conditions. Contact closure switch on the MCPA but controlled by the MFRM software. Default status is OPEN upon power up and CLOSED on power down conditions. 5V supply return for the AIM. Comes from the HPCA via connector P2 and routed through MCPA. 5V supply for the AIM. Comes from the HPCA via connector P2 and routed through MCPA Differential IIC clock to the fan assembly / AIM Differential IIC clock to the fan assembly / AIM Differential IIC receive data (from fan assembly / AIM) Differential IIC receive data (from fan assembly / AIM) Differential IIC transmit data (to fan assembly / AIM) Differential IIC transmit data (to fan assembly / AIM) Routed directly from MTRM connector; turns on LEDs (in the AIM) during power-up sequence. Routed directly from MTRM connector; turns on LEDs (in the AIM) during power-up sequence. 26V supply for the fans from (HPCA) connector P2 26V supply return for the fans from (HPCA) connector P2 Not connected 044-05080 Rev. A 2-7 2-9. IIC, RS485, POWER, AND OTHER SIGNALS CONNECTOR P5 The alarms and sensing connections on the amplifier are made through a 18-pin micro-fit connector

(figure 2-5) and are listed and described in table 2-5. Figure 2-5. IIC, RS485, Power, and Other Signals Connector P5 Table 2-5. IIC, RS485, Power, and Other Signals Connector P5 Definition SIGNAL DESCRIPTION FORCE_ON+

FORCE_ON-

Turns on LEDs (in the AIM) during power up sequence;

routed directly from MTRM connector to fan assembly /

AIM connector Turns on LEDs (in the AIM) during power up sequence;

routed directly from MTRM connector to fan assembly /

AIM connector

-ALLOW_HPA_ENABLE MCPA_TX+

MCPA_TX-

MCPA_RX+

MCPA_RX-

IIC_CLK+

IIC_CLK-

+ALLOW_HPA_ENABLE Enables MCPA when high. Requires enable command via RS485 and HW_ENABLE high impedance to ground and no shutdown conditions exist. Enables MCPA when high. Requires enable command via RS485 and HW_ENABLE high impedance to ground and no shutdown conditions exist. Differential RS485 link to MTRM Differential RS485 link to MTRM Differential RS485 link from MTRM Differential RS485 link from MTRM Differential IIC clock from MTRM Differential IIC clock from MTRM Differential IIC receive data (from MTRM) Differential IIC receive data (from MTRM) Differential IIC transmit data (to MTRM) Differential IIC transmit data (to MTRM)

+5V supply voltage for the IIC circuit on MCPA; not used in any other circuits.

+5V supply voltage return for the IIC circuit on MCPA; not used in any other circuits. Cable detect line connected to GPI/O port of MTRM IIC_RX_DATA+

IIC_RX_DATA-

IIC_TX_DATA+

IIC_TX_DATA-

+5V_DC_IN CABLE_DETECT

+5V_DC_RTN 044-05080 Rev. A 2-8 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 HW_ENABLE microprocessor. Pulled high via +5V_DC_IN; connected to reset pin on microcontroller to allow MTRM reset if necessary. Hardware enable signal. MCPA enabled when shorted to chassis ground. 044-05080 Rev. A 2-9

OPERATING INSTRUCTIONS Section 3 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 NTGY71AA 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 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. NOTE 2. Turn on supply that provides +26 Vdc to the amplifier system. 3. Turn on external exciter/transceiver and apply RF input signals. 044-05080 Rev. A 3-1

PRINCIPLES OF OPERATION Section 4 4-1. INTRODUCTION This section contains a functional description of the multichannel power amplifier (MCPA). 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 NTGY71AA amplifier (figures 1-1 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 70 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 an RS485 interface. The amplifier is compliant to the requirements of FCC Part 22 with respect to spurious emissions

(see table 1-1). 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:

An input amplifier A driver amplifier A main amplifier A multifunction board 4-4.1. INPUT AMPLIFIER RF is fed to the input amplifier, which consists of a bandpass filter, VVAs, and phase shifters for gain control and phase sweeping functions. They are controlled by a microprocessor on the multifunction board. At its output, the input amplifier splits the signal to the driver amplifier and carrier cancellation circuits. 4-4.2. DRIVER AMPLIFIER The driver amplifier consists of two stages of class AB amplification which provide approximately 40 dB of gain in the 25 MHz frequency band from 869 MHz to 894 MHz. The amplifier operates on +26 Vdc, and a safe bias voltage which is controlled by microprocessors. 044-05080 Rev. A 4-1 4-4.3. MAIN AMPLIFIER The main amplifier employs two class AB amplification stages for maximum efficiency. It provides approximately 25 dB of gain in the 25 MHz frequency band. The output from the main amplifier is typically 50.2 dBm. The amplifier operates on +26 Vdc, and gate bias voltages controlled by microprocessors. 4-4.4. MULTIFUNCTION BOARD The multifunction board consists of control and alarm circuits. The MCPA communicates to the host system through the multifunction board which gathers the status information of the amplifier and reports to the host system via the RS485 interface when instructed. It also protects the MCPA from adverse conditions such as overpower, input overdrive, overvoltage, etc. A microprocessor on the multifunction board also controls two loops in the feed-forward system. INPUT AMPLIFIER DRIVER AMPLIFIER MAIN AMPLIFIER RF IN RF OUT MULTIFUNCTION BOARD

(ALARMS AND LOOP CONTROLS) Figure 4-1. NTGY71AA Multichannel Power Amplifier Functional Block Diagram 4-5. AMPLIFIER MODULE COOLING Each amplifier module is contained within a thermally conductive chassis which, when properly mounted on an adequate thermal surface, will provide sufficient cooling to maintain the amplifier within the specified operating temperature range. 4-6. POWER DISTRIBUTION Primary DC power for the amplifier is provided by the host system. The amplifier generates all the required voltages internally from the main source. 044-05080 Rev. A 4-2

MAINTENANCE Section 5 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 INTERVAL 12 Months Performance Tests 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. 044-05080 Rev. A 5-1 MENCLATURE Signal Generator 30 dB Attenuator, 250 Watt Spectrum Analyzer Coax Directional Coupler Power Meter / Sensor Network Analyzer Current Probe Source Diskette Table 5-2. Test Equipment Required MANUFACTURER Agilent (H.P.) Tenuline H.P. H.P. H.P. H.P. Powerwave MODEL ESG4433B 8562E 778D 437B / 8481A 8753D 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. 5-4.1. AMPLIFIER PERFORMANCE TEST. To perform the test, proceed as follows:

1. Connect test equipment as shown in figure 5-1. Do not apply any RF signals at this time. NOTE AMPLIFIER SPURIOUS EMISSIONS TEST:

2. Load the MFRM waveform on the ESG (signal generator). Apply this signal through a driver amplifier to the MCPA so that the RF signal going into the MCPA is approximately -1.5 dBm (adjust the input RF signal level to get 48.5 dBm output power). Measure spurious emissions. Verify that it is within specification. GAIN TEST:

3. Set input power level to power amplifier at 1.5 dBm (869, 881, and 894 MHz). 4. 5. Measure the output power in dBm. Subtract input power (in dBm) from output power (in dBm) to get gain. 6. Check the amplifier gain across the band from 869 MHz to 894 MHz. Gain should be 50 2 dB. Record test data in table 5-3. INPUT RETURN LOSS TEST:

7. Read and record the S11 return loss measurement on network analyzer. Record test data in table 5-3. 044-05080 Rev. A 5-2 Figure 5-1. NTGY71AA Amplifier Test Setup Diagram 044-05080 Rev. A 5-3 Table 5-3. Multichannel Power Amplifier NTGY71AA Test Data Sheet Tested By: ______________________ Serial No: ____________________ Pass/Fail: ______________________ Date: ________________________ 70W MCPA Test Test Conditions: Load and source impedance: 50 ohms, VSWR < 1.2:1 Supply voltage: (+26) Vdc 0.1 Vdc (unless otherwise noted). Network Analyzer Span: 25 MHz FREQUENCY (MHz) 869 894 881 MAX 50.5dB 0.2 dB/

1.25 MHz

-14 dB

-14 dB

-61 dBc

-61 dBc 23.4A

+0.5dB

+0.5dB Check Check Check Check 2.05 Marker #1 = 869 MHz, #2 = 881 MHz, #3 = 894 MHz TEST 1.00 1.01 1.02 CONDITION NETWORK ANALYZER Gain Gain Flatness 49.5dB 0 dB MIN 1.03 1.04 2.00 2.01 2.02 2.03 3.00 3.01 3.02 4.00 4.01 4.02 4.03 4.04 5.00 Input Return Loss, worst case In band Output Return Loss, worst case In band CDMA TESTS 3 CDMA TONES: @ 70W out Spec. Ana. With 10 MHz Res. BW DD @ +1.5MHz DD @ 1.5MHz Current @ 70 W (48.5 dBm) out RMS Power Detection RMS reading in Watts @ Pout = 48.5 dBm -0.5dB RMS reading in Watts @ Pout = 43.5 dBm -0.5dB ALARM TESTS Excessive DC Voltage (>27 V) Verify Over Power Alarm

(>51 dBm for >3 sec) FWD PWR Voltage (4.26V @ 48.5 dBm) REV PWR Voltage (4.26V @ 48.5 dBm) FIRMWARE VERSION 044-05080 Rev. A 5-4 5-5. FIELD REPLACEMENT OF THE MODULE The NTGY71AA 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. 2. 3. 4. 5. 6. Turn off 26 Vdc power to that specific module. Disconnect the two RF cables and connectors P1 through P5. Remove 13 screws that secure amplifier module to heat sink. Carefully remove amplifier module from heat sink. Add Thermstrate thermal interface pad to surface of replacement amplifier which mates with heatsink. Install replacement in reverse order of steps 1 through 4 above. 044-05080 Rev. A 5-5

TROUBLESHOOTING Section 6 INTRODUCTION 6-1 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 Refer to table 6-1 for troubleshooting suggestions. TROUBLESHOOTING Table 6-1. Troubleshooting. SYMPTOM MCPA Inoperative MCPA Not Enabled Alarm Output is (RS 422) High SUGGESTED ACTION 1. Check for proper power supply voltage. 1. Verify HPA-Allow-Enable line is high. Verify input RF is within specified power and frequency limits RETURN FOR SERVICE PROCEDURES 6-3 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 Repair Department at

(949) 809-1100 to obtain this number, or FAX your request to (949) 757-6676. Failure to obtain this RMA number may result in 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 Powerwaves Customer Service Department for packing materials and information. 044-05080 Rev. A 6-1

TABLE OF CONTENTS Par. No. 1-1 1-2 1-3 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 Section 1 General Description Page No. 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

+26 VDC Power and Ground Connector P1................................................................2-2 Alarms and Sensing Connector P2............................................................................2-3 Differential IIC Clock, Receive, and Transmit Connector P3..........................................2-4 IIC, Power, Alarms,and Controls Connector P4...........................................................2-4 IIC, RS485, Power, and Other Signals Connector P5 ..................................................2-6 Section 3 Operating Instructions 3-1 3-2 Introduction.............................................................................................................3-1 Initial Start-Up and Operating Procedures ..................................................................3-1 Section 4 Principles of Operation Introduction.............................................................................................................4-1 4-1 RF Input Signal .......................................................................................................4-1 4-2 RF Output Load.......................................................................................................4-1 4-3 Amplifier Functional Description................................................................................4-1 4-4 4-4.1 Input Amplifier .........................................................................................................4-1 4-4.2 Driver Amplifier ........................................................................................................4-1 4-4.3 Main Amplifier .........................................................................................................4-2 4-4.4 Multifunction Board..................................................................................................4-2 Amplifier Module Cooling..........................................................................................4-2 4-5 4-5 Power Distribution ...................................................................................................4-2 044-05080 Rev. A ii TABLE OF CONTENTS (Continued) 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 ..............................................................................5-5 Par. No. 5-1 5-2 5-3 5-4 5-4.1 5-5 Section 6 Troubleshooting Introduction.............................................................................................................. 6-1 6-1 Troubleshooting........................................................................................................ 6-1 6-2 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 No. Page No. 1-1 2-1 2-2 2-3 2-4 2-5 4-1 5-1 NTGY71AA Multichannel Power Amplifier ..................................................................1-3

+26 Vdc Power and Ground Connector P1.................................................................2-2 Alarms and Sensing Connector P2............................................................................2-3 Differential IIC Clock, Receive, and Transmit Connector P3..........................................2-4 IIC, Power, Alarms, and Controls Connector P4..........................................................2-4 IIC, RS485, Power and Other Connector P5...............................................................2-6 NTGY71AA Multichannel Power Amplifier Functional Block Diagram............................4-2 NTGY71AA Amplifier Test Setup Diagram..................................................................5-3 LIST OF TABLES Page No. NTGY71AA Multichannel Power Amplifier Functional Specifications.............................1-2

+26 Vdc Power and Ground Connector P1 Definition...................................................2-2 Alarms and Sensing Connector P2 Definition .............................................................2-3 Differential IIC Clock, Receive, and Transmit Connector P3 Definition............................2-4 IIC, Power, Alarms, and Controls Connector P4 Definition ...........................................2-5 IIC, RS485, Power and Other Connector P5 Definition.................................................2-6 Periodic Maintenance ..............................................................................................5-1 Test Equipment Required .........................................................................................5-2 Multichannel Power Amplifier NTGY71AA Test Data Sheet..........................................5-4 Table No. 1-1 2-1 2-2 2-3 2-4 2-5 5-1 5-2 5-3 044-05080 Rev. A iii 6-1 Troubleshooting.......................................................................................................6-1 044-05080 Rev. A iv