FCC ID: E675JS0067 W-CDMA Multi-Channel PCS Amplifier

1930-1990 MHz Installation & Service Manual Model NTUM30DA Multi-Channel PCS Amplifier 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved June 2003 NTUM30DA Installation & Service Manual 2003 Powerwave Technologies Incorporated. All rights reserved. Powerwave Technologies, and the Powerwave logo are registered trademarks Powerwave Technologies, Inc. reserves the right to make changes to the documentation and equipment, including but not limited to component substitution and circuitry changes. Changes that impact this manual may subsequently be incorporated in a later revision of this manual. June 2003 Powerwave Technologies, Inc. 1801 East St. Andrew Place Santa Ana, CA 92705 Tel: (714) 466-1000

(888) 797-9283 Fax: (714) 466-5800 Web Site: www.powerwave.com 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved ii June 2003 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 3-1 3-2 NTUM30DA Installation & Service Manual Table Of Contents 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 Power In Connector ....................................................................................................................................... 2-2 Data I/O Connector......................................................................................................................................... 2-3 P3: Differential IIC Clock, Receive, & Transmit Connector................................................................... 2-4 P4: IIC, Power, Alarms, & Controls Connector......................................................................................... 2-4 P5: IIC, RS485, Power, & Other Signals Connector ................................................................................. 2-6 Section 3 Operating Instructions 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 Input Amplifier ................................................................................................................................................ 4-1 4-4.1 1st Loop Phase & Gain.................................................................................................................................... 4-1 4-4.2 4-4.3 Driver Amplifier .............................................................................................................................................. 4-2 4-4.4 Main Amplifier ................................................................................................................................................ 4-2 4-4.5 Multifunction Board....................................................................................................................................... 4-2 4-5 Amplifier Module Cooling ............................................................................................................................ 4-2 Power Distribution......................................................................................................................................... 4-3 4-6 4-7 Amplifier Alarms............................................................................................................................................. 4-3 4-7.1 Minor Alarms................................................................................................................................................... 4-3 4-7.1.1 Main Loop Cancellation Alarm (1st Loop Alarm)...................................................................................... 4-3 4-7.1.2 Error Loop Cancellation Alarm (2nd Loop Alarm)...................................................................................... 4-4 4-7.1.3 Gain Alarm ....................................................................................................................................................... 4-4 4-7.1.4 Partial Failure of Main Amplifier Alarm (Transistor/Device Fail) ........................................................ 4-4 4-7.1.5 Over Temperature Warning Alarm.............................................................................................................. 4-4 4-7.1.6 Power Supply Warning Alarm ..................................................................................................................... 4-4 4-7.1.7 High DC Power Consumption Warning Alarm.......................................................................................... 4-4 4-7.2 Major Alarms................................................................................................................................................... 4-5 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved iii June 2003 NTUM30DA Installation & Service Manual Section 4 Principles of Operation (continued) Par. No. 4-7.2.1 Over Temperature Shutdown Alarm........................................................................................................... 4-5 4-7.2.2 Power Supply Shutdown Alarm .................................................................................................................. 4-5 4-7.2.3 High DC Power Consumption Shutdown Alarm ....................................................................................... 4-6 Page No. 5-1 5-2 5-3 6-1 6-2 6-3 6-3.1 6-3.2 Figure No. 1-1 1-2 1-3 1-4 2-1 2-2 2-3 4-1 4-2 4-3 Table No. 1-1 2-1 2-2 4-1 5-1 6-1 Section 5 Maintenance Introduction ..................................................................................................................................................... 5-1 Periodic Maintenance................................................................................................................................... 5-1 Field Replacement Of The Module.............................................................................................................. 5-1 Section 6 Troubleshooting Introduction ..................................................................................................................................................... 6-1 Trouble shooting............................................................................................................................................. 6-1 Return for Service Procedures .................................................................................................................... 6-1 Obtaining an RMA .......................................................................................................................................... 6-1 Repackaging for Shipment ........................................................................................................................... 6-1 List Of Illustrations Page No. NTUM30DA Amplifier .................................................................................................................................... 1-1 NTUM30DA Amplifier Bottom View............................................................................................................ 1-3 NTUM30DA Amplifier Side View ................................................................................................................ 1-3 NTUM30DA Amplifier Front Panel .............................................................................................................. 1-4 NTUM30DA Amplifier Front Panel .............................................................................................................. 2-2 Power In Connector ....................................................................................................................................... 2-2 Data I/O Connector......................................................................................................................................... 2-3 NTUM30DA Amplifier Block Diagram........................................................................................................ 4-2 Minor Alarm Reporting Sequence .............................................................................................................. 4-3 Major Alarm Reporting Sequence .............................................................................................................. 4-5 List Of Tables Page No. NTUM30DA Multichannel Power Amplifier Functional Specifications.............................................. 1-2 Power In Connector Definition .................................................................................................................... 2-2 Data I/O Connector Definition...................................................................................................................... 2-3 Alarm Summary .............................................................................................................................................. 4-6 Periodic Maintenance................................................................................................................................... 5-1 Troubleshooting.............................................................................................................................................. 6-1 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved iv June 2003 NTUM30DA Installation & Service Manual Section 1 General Description Section 1 General Description 1-1 Introduction 1-1 Introduction This manual contains information and procedures for installation, operation, and maintenance of This manual contains information and procedures for installation, operation, and maintenance of Powerwaves model NTUM30DA multichannel power amplifier (MCPA). The manual is organized Powerwaves model NTUM30DA multichannel power amplifier (MCPA). The manual is organized into six sections as follows:

into six sections as follows:

Section 1. General Description Section 1. General Description Section 2. Installation Section 2. Installation Section 3. Operating Instructions Section 3. Operating Instructions Section 4. Principles of Operation Section 4. Principles of Operation Section 5. Maintenance Section 5. Maintenance Section 6. Troubleshooting Section 6. Troubleshooting 1-2 General Description 1-2 General Description The NTUM30DA is a linear, multichannel power amplifier that operates with an instantaneous The NTUM30DA is a linear, multichannel power amplifier that operates with an instantaneous bandwidth of 20 MHz (determined by the base station) in the 60 MHz frequency band from 1930 bandwidth of 20 MHz (determined by the base station) in the 60 MHz frequency band from 1930 MHz to 1990 MHz. It provides either 30 watts (UMTS) or 45 watts of power, based on the select-

MHz to 1990 MHz. It provides either 30 watts (UMTS) or 45 watts of power, based on the select-

able operating mode. It provides for two RF inputs: a primary input and a redundant input. able operating mode. It provides for two RF inputs: a primary input and a redundant input. Each amplifier module has a power, and data I/O connector that allows the host system to moni-

Each amplifier module has a power, and data I/O connector that allows the host system to moni-

tor the amplifier module performance. Primary power for the amplifier is -48 Vdc. tor the amplifier module performance. Primary power for the amplifier is -48 Vdc. 1-3 Functional & Physical Specifications 1-3 Functional & Physical Specifications Functional and physical specifications for the amplifier are listed in table 1-1. Functional and physical specifications for the amplifier are listed in table 1-1. Figure 1-1. NTUM30DA Amplifier Copyright Powerwave Technologies, Inc., June 2003. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 044-05141 Rev. A 1-1 June 2003 NTUM30DA Installation & Service Manual Table 1-1 NTUM30DA Multichannel Power Amplifier Functional Specifications Frequency Range

*Instantaneous Bandwidth Input Power Continuous Average Output Power 1930-1990 MHz (60 MHz Bandwidth) 20 MHz 1.4 dBm without damage (operating);

15 dBm without damage (non-operating) 45 Watts (46.53 dBm) Mode 1 30 Watts (44.77 dBm) Mode 2 Spurious Emissions @

Maximum Rated Output Power Frequency Offset Fcl: lower frequency center of the emission block. Fcu: upper frequency center of the emission block. F = the frequency gap between the lower or the upper carrier of the emission block and the center of the measurement filter (BW) Fcl- 2.780 MHz< F Fcl- 2.515 MHz Fcu+ 2.515 MHz F < Fcu+ 2.780 MHz Fcl- 3.515 MHz< F Fcl- 2.780 MHz Fcu+ 2.780 MHz F < Fcu+ 3.515 MHz Fcl- 4.0 MHz< F Fcl- 3.515 MHz Fcu+ 3.515 MHz F < Fcu+ 4.0 MHz Fcl- 12.5 MHz< F Fcl- 4.0 MHz Fcu+4.0 MHz F < Fcu+12.5 MHz Max Level dBm Measurement filter BW

- 16 30 kHz

[-16-15*(Fo-2.780)]

30 kHz

-27

-14 30 kHz 1 MHZ RF Gain Output Dynamic Range Mode 1 Mode 2 Output Protection:

Input Port Return Loss:

46.5 1 dB 21.5 dB 19.77 dB Mismatch Protected

< 1.43:1 Max. Out of Band Spurious:

Frequency band 9 kHz 150 kHz 150 kHz 30 MHz 30 MHz 1 GHz 1 GHz Fc1 - 60 MHz Fcl - 60 MHz Fcl - 50 MHz Fcl - 50 MHz Fcl 12.5 MHz Fcu + 12.5 MHz Fcu + 50 MHz Fcu + 50 MHz Fcu + 60 MHz Fcu + 60 MHz 12.75 GHz Max Level (dBm) Measurement filter BW

-39 dBm

-39 dBm

-39 dBm

-33 dBm

-28 dBm

-16 dBm

-16 dBm

-28 dBm

-33 dBm 1 kHz 10 kHz 100 kHz 1 MHz 1 MHz 1 MHz 1 MHz 1 MHz 1 MHZ DC Input Power:

Normal voltage range:

Extended voltage range:

Abnormal voltage range:

Power Consumption:

Mode 1 Mode 2 Reverse polarity protected

-38 V to 58 V

-36 V to 38 V and -58 V to 60 V 0 V to 36 V and -60 V to 72 V 375 W max. 300 W max. Copyright Powerwave Technologies, Inc., June 2003. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 044-05141 Rev. A 1-2 June 2003 NTUM30DA Installation & Service Manual Table 1-1 (Cont.) NTUM30DA Multichannel Power Amplifier Functional Specifications Table 1-1 (Cont.) NTUM30DA Multichannel Power Amplifier Functional Specifications Operating Temperature:

Operating Temperature:

Storage Temperature:

Operating Humidity:

Storage Humidity:

Interface Connectors:

RF Input RF Output

-48 Vdc Power and Ground Alarms and Sensing

-15 C to +95 C (internal temperature sensor)

-15 C to +95 C (internal temperature sensor)

-40 C to +85 C 5 % - 95 % Relative Humidity (Non-condensing) 5 % - 95 % Relative Humidity (Non-condensing) SMA Female N Female 3W3 D-Sub 25-Pin D-Sub 22 lbs 12.82 (W) x 15.70 (D) x 2.94 (H) Weight Dimensions (inches):

*The base station reports the lowest carrier frequency and the activated RF carriers. The ampli-

fier then sets the pilot frequency accordingly. All dimensions are in inches And are for reference only Figure 1-2. NTUM30DA Amplifier Bottom View Figure 1-3. NTUM30DA Amplifier Side View Copyright Powerwave Technologies, Inc., June 2003. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 044-05141 Rev. A 1-3 June 2003 NTUM30DA Installation & Service Manual Figure 1-4. NTUM30DA Amplifier Front Panel Copyright Powerwave Technologies, Inc., June 2003. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 044-05141 Rev. A 1-4 June 2003 NTUM30DA Installation & Service Manual Section 2 Installation 2-1 Introduction This section contains unpacking, inspection, and installation instructions and recommendations for the Model NTUM30DA Multi Channel Power Amplifier. Carefully read all material in this sec-

tion 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 Com-

munications 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 -48 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 elec-

trical 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 & Inspection This equipment has been operated, tested and calibrated at the factory. Carefully open the con-

tainer(s) and remove the amplifier module(s). Retain all packing material that can be reassem-

bled in the event that the unit must be returned to the factory. Exercise care in handling equipment during inspection to prevent damage caused by rough or careless handling. CAUTION 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 extrane-

ous 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 impor-

tance 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 re-

course. 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 CAR-

RIER'S PERFORMANCE 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 2-1 June 2003 NTUM30DA Installation & Service Manual 2-4 Installation Instructions (Refer to figure 1-1) The NTUM30DA amplifier module is designed for installation on a heatsink that permits access to the module for connection of the RF cables and the power, alarm, and control connectors. To install the amplifier proceed as follows:

Figure 2-1 NTUM30DA Amplifier, Front Panel View Install the amplifier and secure in place with appropriate mounting screws. See figure 2-1. 1. 2. Connect the antenna cable to TRANSMITTER female N-type connector. 3. Connect the transceiver output cables to the RF IN female SMA connectors. Turn the front panel Power switch off before connecting the power cable. WARNING 4. Connect the power, and data cables to matching Power In and Data I/O connectors. Refer to paragraphs 2-5 and 2-6 following for appropriate port and pin connections. 5. Check your work before applying DC voltage to the system. Make certain all connections are tight and correct. 6. Measure primary DC input voltage. DC input voltage should be -48 0.5 Vdc. If the DC in-

put voltage is above or below the limits, call and consult Powerwave before you turn on your amplifier system. 7. Refer to section 3 for initial turn-on and checkout procedures. 2-5 Power In Connector The -48 Vdc power and ground connections on the amplifier are made through a 3-pin female D-Sub connector (figure 2-2) and are listed and described in table 2-1. 3 2 1 Figure 2-2 Power In Connector Table 2-1 Power In Connector Definition Pin 1 2 3 Signal

-48 V Chassis Gnd

.-48V_RTN Description

-48 Vdc for MCPA Chassis Ground

-48 Vdc return, grounded to MCPA chassis ground 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 2-2 June 2003 NTUM30DA Installation & Service Manual 2-6 Data I/O Connector The alarms and sensing connections on the amplifier are made through a 14-pin micro-fit con-

nector (figure 2-3) and are listed and described in table 2-2. 14 1 25 13 Figure 2-3 Data I/O Connector Table 2-2 Data I/O Connector Definition Signal Manuel control GND PA-Enable-Actif +

PA-Enable-Actif -

PA_presence_reset GND_presence_reset Reserved GND Reserved Reserved GND Reserved Reserved UART TX+ (TRM to MCPA) UART TX- (TRM to MCPA) Reserved UART RX+ (MCPA to TRM) UART RX- (MCPA to TRM) GND Reserved Reserved Reserved Reserved Reserved Reserved Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Description Control ON/OFF Ground Control Control Towards controller Ground Reserved Ground Reserved Reserved Ground Reserved Reserved Base Station Control and Alarm Signaling Base Station Control and Alarm Signaling Reserved Base Station Control and Alarm Signaling Base Station Control and Alarm Signaling Ground Reserved Reserved Reserved Reserved Reserved Reserved 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 2-3 June 2003 NTUM30DA Installation & Service Manual Section 3 Operating Instructions 3-1 Introduction This section contains operating instructions for the Multicarrier Cellular Amplifier. 3-2 Initial Start-Up & Operating Procedures There are no operating controls or indicators on the NTUM30DA amplifier module. To perform the initial start-up, proceed as follows:

1. Verify that all input and output cables are properly connected, per section 2. CAUTION Before applying power, make sure that the input and output of the amplifier are prop-

erly terminated at 50 ohms. Do not operate the amplifier without a load attached. Re-

fer 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 co-

axial cable. Use of any other cable will distort the output. NOTE 2. Turn on supply that provides -48 Vdc to the amplifier system. 3. Turn the amplifier front panel switch to On. The amplifier will run through built-in-test for a few seconds, and notify the BTS when the loops converge. The base station allows up to 30 seconds for this step to complete. 4. Turn on external exciter/transceiver and apply RF input signals. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 3-1 June 2003 NTUM30DA Installation & Service Manual Section 4 Principles of Operation 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 NTUM30DA amplifier (figures 1-1 and 4-1) is a linear, MCPA that operates in the 60 MHz frequency band from 1930 MHz to 1990 MHz with an instantaneous bandwidth of 20 MHz. The operating band is determined by the operating frequency selection(s) of the base station (refer to table 1-1). The amplifier produces 45 watts of output power when operated in mode 1 or 30 watts of output power when operated in mode 2. Each amplifier is a self-contained module and is func-

tionally independent of any other amplifier module(s) 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 RS-485 interface. The amplifier is compliant to the requirements of FCC rules 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 varia-

tions, for example those due to temperature, are reduced to the passive reference variations. The amplifier module is comprised of:

An input amplifier 1st Loop Phase & Gain A driver amplifier A main amplifier A multifunction board 4-4.1 Input Amplifier RF is fed to the input amplifier, which consists of an isolator at the input, bandpass filter, voltage variable attenuators (VVA), and phase shifters for gain control and phase sweeping functions. The circuits in this section of the amplifier are controlled by a microprocessor on the Multifunction board. At its output, the input amplifier splits the signal to the 1st Loop Phase and Gain circuit, and the carrier cancellation circuit. 4-4.2 1st Loop Phase & Gain The 1st Loop Phase & Gain circuit is a predistortion amplifier. The input signal is predistorted such that it linearizes the output of the main amp at the rated output power of the MCPA. It also contains the main loop VVAs and phase shifters. All the predistortion voltages and loop voltages are controlled by a microprocessor. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-1 June 2003 NTUM30DA Installation & Service Manual 4-4.3 Driver Amplifier The driver amplifier consists of two stages of class AB amplification, which provide the approxi-

mately 40% of the gain in the 60 MHz frequency band from 1930 MHz to 1990 MHz. 4-4.4 Main Amplifier The main amplifier employs two class AB amplification stages for maximum efficiency. It provides approximately 40% of the gain in the 60 MHz frequency band. The output from the main amplifier is typically higher than the rated output power of the MCPA, to allow for losses associated with the components in the remaining RF path. The RF signals are then applied to a delay line and directional coupler, where the distortion products are cancelled out and the amplifier power per-

formance is monitored. 4-4.5 Multifunction Board The multifunction board consists of feed forward loop control and alarm circuits. The MCPA com-

municates to the host system through the multifunction board, which gathers the status informa-

tion of the amplifier and reports to the host system via the RS-485 interface when instructed. It also protects the MCPA from adverse conditions such as overpower, input overdrive, over-

voltage, etc. A microprocessor on the multifunction board also controls two loops in the feed-

forward system. 1st Loop Phase & Gain Driver Main Amp

-40dB

-30dB Delay

-10dB RF Out RFL PWR Pre Amp Delay 2nd Loop Phase & Gain Error Amp Feed Forward Loop control FWD PWR

+15 +5 -5 Power Supply

+27VDC Alarms & Display Smart Rack Front Panel Figure 4-1 NTUM30DA Multichannel Power Amplifier Functional Block Diagram 4-5 Amplifier Module Cooling Each amplifier module is contained within a thermally conductive chassis and properly mounted on an adequate thermal surface, which provides sufficient cooling when forced air is circulated over the heat sink fins to maintain the amplifier within the specified operating temperature range. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-2 June 2003 NTUM30DA Installation & Service Manual 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. 4-7 Amplifier Alarms 4-7.1 Minor Alarms When a minor alarm condition occurs, the alarm is latched into a minor alarm condition. The am-

plifier alarm state is read by the BTS the next time the amplifier is poled by the BTS. After the alarm status is sent the minor alarm register is cleared, unless the alarm condition still exists. If the amplifier receives a Enable Command or Clear Alarms Command, all minor alarms will be cleared. If the amplifier is disabled, all minor alarms are also cleared. Minor alarms do not directly affect amplifier functionality. MCPA BTS OPERATIONAL Minor Alarm condition appears Read Power and Status command Read Power and Status response - Alarm reported Minor Alarm condition still exists Read Power and Status command Read Power and Status response - Alarm reported Minor Alarm condition disappears Read Power and Status command Read Power and Status response - No Alarm reported Figure 4-2 Minor Alarm Reporting Sequence 4-7.1.1 Main Loop Cancellation Alarm (1st Loop Alarm) During normal operation, if the 1st Loop is not locked for 30 seconds a Main Loop Cancellation Alarm is declared. During power-up, the BTS waits for 30 seconds to allow the 1st Loop to lock. When the main amplifier is first turned on, the Main Loop Cancellation Alarm ON is on until the loops converge. The BTS allows 30 seconds for the alarm to clear after putting the amplifier into Operational mode before reporting the alarm. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-3 June 2003 NTUM30DA Installation & Service Manual 4-7.1.2 Error Loop Cancellation Alarm (2nd Loop Alarm) During normal operation, if the 2nd Loop is not locked for 30 seconds a Error Loop Cancellation Alarm is declared. During power-up, the BTS waits for 30 seconds to allow the 2nd Loop to lock. When the error amplifier is first turned on, the Error Loop Cancellation Alarm ON status is on until the loops converge. The BTS allows 30 seconds for the alarm to clear after putting the amplifier into Operational mode before reporting the alarm. Detected loss of pilot signal with the error amplifier on, also leads to an Error Loop Cancellation Alarm. 4-7.1.3 Gain Alarm The gain alarm is caused by either of the following conditions:

No output power with a nominal input power.

(Pin > -3.8 dBm and Pout < 25 dBm for five seconds. Pin > +2.5 dB for five seconds. 4-7.1.4 Partial Failure of Main Amplifier Alarm (Transistor/Device Fail) A sensor detects a main or error amplifier transistor failure. A transistor failure is detected as fol-

lows:

When the main and error amplifiers are first turned on and converged, the Main VVA and Er-

ror VVA convergence points are compared to the Default Main VVA and Default Error VVA values (with temperature compensation). If either of the VVAs is significantly lower than its default value, the Partial Failure of Main Amplifier alarm is set. After the above test is performed, the Main VVA and Error VVA are continually monitored. If the Main VVA or Error VVA significantly drop then the Partial Failure of Main Amplifier alarm is set. 4-7.1.5 Over Temperature Warning Alarm The MCPA will alarm if the temperature exceeds the normal operation temperature threshold

(90C internal temperature sensor) for five seconds. This threshold is a few degrees below the Over Temperature Shutdown Alarm. 4-7.1.6 Power Supply Warning Alarm The MCPA monitors the non-converter voltages, 15V, 5V and -5V power supply voltages and alarms when of any of these DC voltages fail for at least five seconds. The normal operating range for these voltages is: 15V + 1.5V, 5V + 0.5V and 5V + 0.5. 4-7.1.7 High DC Power Consumption Warning Alarm If input DC power exceeds 375W in Mode 1 or 300W in Mode 2, for five seconds, the High DC Power Consumption Warning Alarm is set. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-4 June 2003 4-7.2 Major Alarms NTUM30DA Installation & Service Manual When a major alarm condition occurs, the alarm is latched into a major alarm condition. The am-

plifier alarm state is read by the BTS the next time the amplifier is poled by the BTS. After the alarm status is sent the major alarm register is not cleared. If the amplifier receives a Enable Command or Clear Alarms Command, all major alarms will be cleared. If the amplifier is dis-

abled, all major alarms are also cleared. Major alarms cause the amplifier to enter a STANDBY state, and the transceiver(s) associated with the amplifier will be off-the-air. The error amplifier and main amplifier are turned off. MCPA BTS OPERATIONAL Major Alarm condition appears STANDBY Read Power and Status command Read Power and Status response - Alarm reported Major Alarm condition still exists Read Power and Status command Read Power and Status response - Alarm reported Major Alarm condition disappears Read Power and Status command Read Power and Status response - Alarm reported Figure 4-3 Major Alarm Reporting Sequence 4-7.2.1 Over Temperature Shutdown Alarm The MCPA will alarm if the base plate temperature exceeds the temperature threshold at which the MCPA can be damaged (95C) for five seconds. This condition does not auto-recover and will require a reset command when the condition is corrected and the amplifier module has cooled sufficiently. 4-7.2.2 Power Supply Shutdown Alarm The MCPA monitors the converter power supply output voltages, 28V (23V in Mode 2) and 9V, and sets the Power Supply Shutdown Alarm if a power supply converter fails for five seconds or longer. The alarm is set under the following conditions and does not auto-recover:

28V > 30.8V or 28V < 24.8V in Mode 1 or 24V > 25.75V or 24V < 20.25V in Mode 2. 9V > 9.9V or 9V < 8.1V 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-5 June 2003 NTUM30DA Installation & Service Manual 4-7.2.3 High DC Power Consumption Shutdown Alarm If input power exceeds 417W in Mode 1 or 330W in Mode 2, for one second, the High DC Power Consumption Shutdown Alarm is set. Alarm Definition Implementation Table 4-1 Alarm Summary High DC Power Consumption

(Minor) Temperature Overload (Major) Temp Sensor Temperature > 90C Temp Sensor Temperature > 85C High Temperature (Minor) 9V or 28V (23V in Mode 2) more than 10%

DC/DC Converter Shutdown

(Major) out of tolerance 5V, -5V, +15V more than 10% out of toler-

DC Voltage Regulation Failure ance

(Minor) DC Power Consumption Mode 1: Input DC power > 417W Overload (Major) Mode 2: Input DC power > 330W Mode 1: Input DC power > 375W Mode 2: Input DC power > 300W 1. Input Power > +2.5 dB OR 2. Input Power > -3.8 dB AND Output Power < 25 dBm Main Amp or Error Amp transistor failure detected. 1st Loop Error > 2.5V (No persistence when amplifier first enabled.) 2nd Loop Error > 2000 (No persistence when amplifier first enabled.) Loss of Pilot detected. Partial Failure of Main Ampli-

fier (Minor) Main Cancellation Loop (Mi-

nor) Error Cancellation Loop

(Minor) Gain Control (Minor) Persistence Time 5 seconds 5 seconds 5 seconds 5 seconds 1 second 5 seconds 5 seconds (both)

30 seconds 30 seconds

(on item 1) 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 4-6 June 2003 NTUM30DA Installation & Service Manual Section 5 Maintenance 5-1 Introduction This section contains periodic maintenance and performance test procedures for the multichan-

nel 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 re-

pair 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 Interval Action Task Inspection Cables & Connectors 12 Months Performance Tests Inspect signal and power cables for frayed insulation. Check RF connectors to be sure that they are tight. No periodic maintenance is necessary beyond that recommended by the base station manufacturer. 5-3 Field Replacement Of The Module The NTUM30DA multichannel power amplifier module can be replaced in the field on site by a qualified technician with adequate ESD protection and experience maintaining RF power amplifi-

ers and similar equipment. To replace a power amplifier module, proceed as follows:

1. Turn off that specific module. 2. Disconnect the three RF cables and D-sub connectors (Power In and Data I/O). 3. Loosen 4 front panel captive screws that secure amplifier module to the base station. 4. Carefully remove amplifier module from the base station. 5. Install replacement in reverse order of steps 1 through 4 above. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 5-1 June 2003 NTUM30DA Installation & Service Manual Section 6 Troubleshooting 6-1 Introduction This section contains a list of problems and a few suggested actions that may correct the prob-

lem. 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 re-

pair 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 Troubleshooting Refer to table 6-1 for troubleshooting suggestions. Table 6-1 Troubleshooting Symptom MCPA Inoperative MCPA Not Enabled Alarm Output is (RS 422) High Verify input RF is within specified power and frequency limits Suggested Action Check for proper power supply voltage. Verify HPA-Allow-Enable line is high. 6-3 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. Please contact our Repair Department at (888) 797-9283 or (714) 466-

1000 to obtain this number, or FAX your request to (714) 466-5816. 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. 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 6-1 June 2003 NTUM30DA Installation & Service Manual Field Failure Report RMA No.: __________ S/N: __________ Customer: ___________________ Region: ________________ Technician: ___________________ Phone No.: __________ Manufacture Date: ___________ Failure Date: ___________ Site ID: _____________ Does customer want a Failure Analysis Report? Y / N Failure Mode (please circle all that apply):

Loop Fail VSWR Low Pwr Ovr Pwr DC LPA Disable Ovr Temp Alarm No RF Out Firmware Shipping Damage Missing Hardware Connector Damaged Failed During (please circle all that apply):

Installation Normal Operation Scheduled Maintenance High Traffic Hour Medium Traffic Hour Low Traffic Hour DOA? Y / N Failure Frequency:

Intermittent Permanent Failure Details:

Did other equipment fail at the same time? (Please describe) 044-05141 Rev. A Copyright Powerwave Technologies, Inc., June 2003. All rights reserved 6-2 June 2003