FCC ID: E675JS0056 Multi Carrier RF Power Amplifier

G3S-800-140-031 Installation & Service Manual Section 1 General Description 1-1 Introduction This manual contains information and procedures for installation, operation, and maintenance of Powerwaves G3S-800-140-031 multicarrier RF power amplifier. 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 G3S-800-140-031 (see figure 1-1) is a linear, feed-forward power amplifier that operates in the frequency band from 851 MHz to 869 MHz. The amplifier can simultaneously transmit multi-

ple frequencies, with better than -60 dBc third order intermodulation distortion (IMD). It is de-

signed for use in an amplifier system that is modular in design, and is ideally suited for use in base stations. The plug-in Model G3S-800-140-031 amplifier modules can each provide 140 watts of power and function completely independently of each other. The amplifier modules are designed for parallel operation to produce high peak power output and backup redundancy for remote applications. All solid-state, the system is designed to provide trouble-free operation with minimum maintenance. The system's modular construction and unique and highly effective LED-based operational status and fault indicators help minimize downtime. The turn-on and turn-

off sequences of voltages are fully automatic, as is overload protection and recycling. Inadver-

tent operator damage from front panel manipulation is virtually impossible. The amplifier module has a status connector that allows the host system to monitor the amplifier module performance. The front panel of each amplifier module has unit level status/fault indica-

tors and an RF on/off/reset switch. Primary power for the amplifier is +27 Vdc. Cooling for each plug-in amplifier module is provided by four fans, two mounted on the front and two on the rear of the module. The fans draw outside air through the front of the module and exhaust hot air out through the rear of the module. 1-3 Functional And Physical Specifications Functional and physical specifications for the amplifier are listed in table 1-2. 1-4 Equipment Changes Powerwave Technologies, Inc. reserves the right to make minor changes to the equipment, in-

cluding but not necessarily limited to component substitution and circuitry changes. Changes that impact this manual may subsequently be incorporated in a later revision of this manual. Copyright Powerwave Technologies, Inc., September 2001. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 1-1 September 2001 044-05095 Rev. A G3S-800-140-031 Installation & Service Manual 1-5 Ordering Information Table 1-1 following gives the part numbers and descriptions to be used when ordering either an entire amplifier or replacement fans. Table 1-1 Major Amplifier Components Model Number G3S-800-140-031 800-01075-003 800-00972-002 Description 140 W 851-869 MHz MCPA Module Front fan assembly Rear fan assembly. Table 1-2 G3S-800-140 Multicarrier Cellular Amplifier Functional Specifications Frequency Range Instantaneous Bandwidth Total Maximum Input Power Total Output Power IMD and In-band Spurious, mean measurement, 30 kHz bandwidth@

+26 to +28Vdc, 25C Out of Band Spurious & Noise, measured in 30 KHz BW RF Gain Gain Flatness:

Gain Variation w/ Voltage and Frequency Gain Variation Over Temperature:

Noise Figure Output Protection:

Input Port Return Loss:

Harmonics:

Out of Band Spurious:

Duty Cycle:

DC Input Power:

DC Circuit Breaker Rating Operating Temperature:

Storage Temperature:

Operating Humidity:

Storage Humidity:

DC Input, Summary Alarm, and RF Input / Output Connectors:

Heat Generation Weight Dimensions:

Electrical Service Recommendations Circuit Breakers 851-869 MHz (18 MHz Bandwidth) 18 MHz

-6.54 dBm 140 W (51.46 dBm) typical (1 Module)

-60dBc or -16 dBm max @ up to 16 equal power CW tones with a combined maximum power of P0 with a max single carrier power of P0/16 with maximum crest factor of 7.5dB up to the maximum rated RF output power.

-60 dBc max @ +26 to +28 Vdc 58 dB +0.5 dB 0.5 dB @ 27 Vdc 1 Vdc

+ 0.5 dB; 26 to 28 Vdc 0.5 dB 25 dB max Mismatch Protected 16 dB min Better than -50 dBc Better than -60 dBc Continuous

+27 Vdc 1 Vdc, 70 amps max Operational +21 Vdc to 30 Vdc 100 Amps 0 C to +50 C

-40 C to +85 C 0 % to 80 % Relative Humidity (noncondensing) 0 % to 100 % Relative Humidity (noncondensing) 21-Pin D-Subminiature Combo Connector plus single-

pin D-Sub connector for additional DC capability. 5510 BTUS (1 Amplifier) 50 lbs. 5.20 High, 17.00 Wide, 20.00 Deep Capable of handling anticipated inrush current (nor-

mally 25% over equipment maximum current draw), in a load center with a master switch. Copyright Powerwave Technologies, Inc., September 2001. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 1-2 September 2001 044-05095 Rev. A G3S-800-140-031 Installation & Service Manual Figure 1-1 G3S-800-140-031 Copyright Powerwave Technologies, Inc., September 2001. All rights reserved All specifications are subject to change without notice. Contact the factory for complete performance data. 1-3 September 2001 044-05095 Rev. A

G3S-800-140-031 Installation & Service Manual Section 2 Installation 2-1 Introduction This section contains installation recommendations, unpacking, inspection, and installation in-

structions for the Multicarrier Cellular 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 review the Federal Communications Commission (FCC) rules as 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 +27 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 capable of handling the anticipated inrush cur-

rent (normally 25% over equipment maximum current draw), in a load center with a master switch. A 70-amp circuit breaker installed in the power distribution unit is recommended for each amplifier. Either 2 or 4 AWG DC wire should be installed for each amplifier based on the cable design and length. Amplifier Power 140 140 140 140 Table 2-1 Averaged Current No. Of Amplifiers 3 Sector Averaged Current 2 Sector Averaged Current 1 Sector Averaged Current 12 9 6 1 588 441 294 49 504 336 56 378 63 2-3 Air Conditioning Each G3S-800-140-031 amplifier generates 5971 BTUs of heat at full power. A fully populated MCR30829-1-3 subrack operating at full power will generate 17,913 BTUs of heat. A full three-

sector site employing three fully populated MCR30829-1-3 subracks will generate 53,739 BTUs of heat at full power (360W per subrack). A five-ton air conditioner is needed to cool this Power-

wave equipment. A full three-sector site probably needs at least a five-ton air conditioner to cool all of the site's equipment, based on heat load averaging as described in table 2-2. Since all the amplifiers are not running at full capacity at the same time in normal operation, table 2-2 de-

scribes the heat load for a 3 sector (70%), 2 sector (80%) and omni (90%) site. Perform a site survey to determine actual air conditioning needs. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 2-1 September 2001 G3S-800-140-031 Installation & Service Manual Amplifier Power 140 140 140 140 No. Of Amplifiers 12 9 6 1 Table 2-2 Averaged Heat Loading 2 Sector 3 Sector Averaged BTU's Averaged BTU's 50,156.4 37,617.3 25,078.2 4,179.7 42,991.2 28,660.8 4,776.8 1 Sector Averaged BTU's 32,243.4 5,373.9 2-4 Unpacking And Inspection This equipment has been operated, tested and calibrated at the factory. Only in the event of se-

vere shocks or other mistreatment should any substantial readjustment be required. 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. 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 or fans. Inspect the rear panel connector for bent connec-

tor pins. 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. Pow-

erwave 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 PERFORM-

ANCE. 2-5 Installation Instructions (refer to figures 1-1 and 2-1) The G3S-800-140-031 amplifier module is designed for installation in a subrack for connection of DC power, RF, and monitor cables. To install the amplifier proceed as follows:

1. Install the subrack in an equipment rack and secure in place, based on the installation in-

structions from the appropriate manual for the subrack being installed. 2. Connect the subrack RF output to a high quality transmit filter. Powerwave recommends that a 500W average power / 10KW instantaneous peak power rated filter be used in most appli-

cations. 3. Connect the combined transceiver output(s) to the RF Input port of subrack. 4. Connect the alarm cable(s) to the alarm port of subrack. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 2-2 September 2001 G3S-800-140-031 Installation & Service Manual Verify that all circuit breaker switches on the power distribution panel are in the OFF position. Turn off external primary DC power before connecting DC power cables. WARNING 5. Connect positive primary power and negative primary power to the subrack. Tighten the subrack power connections. 6. Verify that the plug-in amplifiers front panel On/Off switch is in the Off position. 7. Inspect the 21-pin D-Sub male combo connector on the rear of each amplifier before install-

ing the amplifier in the amplifier subrack. Verify that all pins are straight, no pins are re-

cessed, that the alignment shield is not bent, and no packing material is embedded in the connector. Forcing the amplifier into the subrack at too fast a rate may cause the pins on the 21-

pin D-sub connector of the amplifier to become recessed or broken. CAUTION 8. Install the plug-in amplifier module(s) in the subrack. Tighten left and right thumbscrews un-

til finger tight. Tighten the thumbscrews with a slotted screw driver about 1/8 of a turn past finger tight. 9. Check your work before applying DC voltage to the system. Make certain all connections are tight and correct. 10. Turn the power distribution circuit breakers back on. 11. Measure primary DC input voltage. DC input voltage should be +27 Vdc 1.0 Vdc. If the DC input voltage is above or below the limits, call and consult Powerwave before you turn on your amplifier system. 12. Refer to section 3 for initial turn-on and checkout procedures. 2-6 Amplifier Module Connectors The amplifier has three connectors on the right rear of the module. The larger is a 21-pin male D-Sub combo, which provides the status, alarm, control, and power connections. The smaller BMA coaxial female connectors provide the RF connections. Refer to figure 2-1. Figure 2-1 G3S-800-140-031 Amplifier, Rear View 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 2-3 September 2001 G3S-800-140-031 Installation & Service Manual 2-6.1 Amplifier Module Status, Alarm, Control, And Power Connector The amplifier has a separate remote alarm and control connector, which may be used by the host system to monitor and control the individual amplifier modules. The status, alarm, control, and power connections on the amplifier connector are made through a 21-pin male D-Sub combo connector (figure 2-2) and are listed and described in table 2-3. 1 2 3 4 5 6 7 8 9 A1 A2 A3 A4 Figure 2-2 DC and Logic Connector (on Rear of G3S-800-140-031 Amplifier Module) 10 11 12 13 14 15 16 17 Pin A1 A2 A3 A4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Table 2-3 Amplifier Module DC and Logic Connector Definition Function Description Power Input Power Input Ground Ground RS485 +TxD RS485 +RxD Service Loop MCPA Disabled

(Summary Fault) Mod Addr 0 Mod Addr 1 TP1 Manual Download DC on stat RS485 TxD RS485 RxD SCL7 SDA7 FP Disable Output FP RST

+27 Vdc (Power Contact)

+27 Vdc (Power Contact) Ground (Power Contact) Ground (Power Contact) Serial Communication Data Out Serial Communication Data In TTL input to Amp. Gnd. for special test mode (Note 1) TTL signal normally low indicates MCPA enabled. A high level indicates that the MCPA has been disabled. Over Power, Over Voltage takes one second to activate the signal. TTL input to Amp. Gnd. supplied by shelf to identify slot. TTL input to Amp. Gnd. supplied by shelf to identify slot. TTL output. Future test point. GND to download manually TTL output. High indicates Amp is powered on. Serial Communication Data Out Serial Communication Data In No connection No connection Output, GND if the front panel switch is in the OFF position; +5 volts in-

dicates the front panel switch is in the ON position. Output, GND if the front panel switch is in the RESET position; +5 volts otherwise. GND Module Detect Ground Ground potential. Informs the subrack that an MCPA is plugged in. Note 1: Service loop grounded allows the MCPA to be enabled or disabled by the front panel switch when not mounted in the shelf. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 2-4 September 2001 G3S-800-140-031 Installation & Service Manual 2-6.2 Amplifier Module RF Connector The amplifier has separate RF connectors, which are used for the RF signal input and output. The RF connections on the amplifier connector are made through two BMA female coaxial con-

nectors (figure 2-3) and are listed and described in table 2-4. A1 A2 Figure 2-3 Amplifier RF Connector Table 2-4 Amplifier RF Connector Definition Pin A1 A2 Function RF Input RF Output Description BMA Coaxial Female, Radiall BMA Coaxial Female, Radiall 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 2-5 September 2001

G3S-800-140-031 Installation & Service Manual Section 3 Operating Instructions 3-1 Introduction This section contains operating instructions for the Multicarrier Cellular Amplifier System. 3-2 Location And Function Of Amplifier Module Controls And Indicators Primary +27 Vdc power is applied to the amplifier via a 100-amp circuit breaker (ON-OFF) lo-

cated on the left side of the amplifier front panel. The plug-in amplifier module RF control and indicators, located in the center of the amplifier front panel between the cooling fans, are shown in figure 3-1. The status and RF control functions and alarms are described in detail in the subsequent paragraphs. Figure 3-1 G3S-800-140-031 Amplifier Module RF Control and Indicators 3-2.1 Voltage Indicators And On/Off/Reset Switch 3-2.1.1 +27VDC Indicator Green LED. When lit, indicates that the +27 Vdc supply is greater than +21 Vdc and less than

+31 Vdc. If the +27 Vdc indicator goes out, the DC FAIL indicator will illuminate. This indicates that the +27 Vdc voltage dropped below +21 Vdc. 3-2.1.2 +15VDC Indicator Green LED. When lit, indicates that the +15 Vdc supply is greater than +12 Vdc and less than

+17 Vdc. If the +15 Vdc indicator goes out, the DC FAIL indicator will illuminate. This indicates that the +15 Vdc voltage dropped below +12 Vdc or increased above +17 Vdc. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 3-1 September 2001 G3S-800-140-031 Installation & Service Manual 3-2.1.3 +5VDC Indicator Green LED. When lit, indicates that the +5 Vdc supply is greater than +2 Vdc and less than +7 Vdc. If the +5 Vdc indicator goes out, the DC FAIL indicator will illuminate. This indicates that the +5 Vdc voltage dropped below +2 Vdc or increased above +7 Vdc. 3-2.1.4 -5VDC Indicator Green LED. When lit, indicates that the -5 Vdc supply is greater than -7 Vdc and less than -2 Vdc. If the -5 Vdc indicator goes out, the DC FAIL indicator will illuminate. This indicates that the

-5 Vdc voltage dropped below -7 Vdc or increased above -2 Vdc. 3-2.1.5 RF ON Switch Three position switch:

Off (down position) - Turns off amplifier module. On (center position) - Normal amplifier on position. Reset (up position) - When toggled to reset position, all the red LED indicators will turn on one at a time in sequence followed by all the green indicators one at a time in sequence; this will also reset the fault latches. If the switch is held in the reset position, a microcontroller reset will occur. This will be verified by the LEDs toggling state again. The switch is spring loaded to return to the normal ON position when released. If a fault occurs and the MCPA is disabled, the alarms can be cleared and the MCPA enabled by this reset position. The func-

tions of the switch are disabled for five seconds after a power-up condition. 3-2.2 Alarm Indicators The alarm modes described here are indicative of amplifier alarm modes made to the amplifier subrack. The amplifier subrack interprets these alarms and may subsequently deliver a different alarm indication to the host equipment. Refer to the amplifier subrack manual to determine host equipment level alarms. Refer to section 6 to interpret and correct the various alarm states. Refer to table 3-1. A Minor Alarm indicates a potential fatal amplifier problem via the amplifier front panel LEDs. and the MCPA fault will be in evaluation. A Major Alarm indicates a major problem but the MCPA module will not be disabled. A Critical Alarm is indicative of a fatal problem. The fault indicator will latch on and the MCPA module will be disabled. Both Major Alarm and Critical Alarm will be sent to the host system via the MCPA subrack. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 3-2 September 2001 G3S-800-140-031 Installation & Service Manual Table 3-1 Amplifier Module Alarm Indicators Definition Alarm Mode LED MCPA Module MCPA Disable signal

(pin 4 inTable 2-1) Condition Over Pwr Critical Red Disable Over Pwr Critical Red Disable High Temp Minor Red Enable High Temp Critical Red Disable Minor Red Enable Critical Red Disable VSWR VSWR DC Fail Minor Red Enable Critical Red Disable DC Fail Critical Red Disable DC Fail

(Over voltage) Fan Fail

(one) Major Red Enable Loop Fail Minor Red Enable Loop Fail Critical Red Disable Low Pwr Minor Red Enable Low Pwr Critical Red Disable High High Low High Low High Low High High Low Low High Low High LPA DISAB. Critical Red Disable High MCPA module output power >200 watts (Note 4) Input power >-2 dBm High temperature detected High temperature detected for longer than two minutes 14.5 W < Reflected Power < 38W 60W < Reflected power detected at output longer than approx. two min. One of the internal DC voltages dropped below or exceeded the safe threshold level Voltage out of range for longer than approx. two minutes (Note 2)

+27 Vdc input >30 V for longer than one sec. after initial detection of DC input >31 V (Note 3) Any fan failure Loop failure detected Loop failure detected longer than 2 minutes Rack controller detected MCPA out-

put is 3 dB below that of the other MCPA in the system. Rack controller detected low power condition for more than approx. two minutes Unit is manually switched off using the front panel RF ON switch, or dis-

abled by a serial command or auto shutdown by an alarm condition. NOTES:

1. RS-485 serial alarm will follow LED status. 2. The appropriate status LED shall turn off indicating which voltage is out of its range. 3. When overvoltage is detected:

a) MCPA shall shut down (disable) b) Turn on red DC Fail LED c) Set flag for DC Fail alarm 4. When overpower is detected:

a) MCPA shall shut down (disable) b) Turn on Over Pwr LED c) Set flag for Over Pwr alarm d) The MCPA module shall use a peak power detector to determine the overpower fault. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 3-3 September 2001 G3S-800-140-031 Installation & Service Manual 3-3 Initial Start-Up And Operating Procedures The amplifier module has two operating controls, both located on the front face of the module: the power ON - OFF switch and the RF ON - ON/OFF/RESET switch (refer to figures 1-1 and 3-1). To perform the initial start-up, proceed as follows:

1. Verify that all input and output cables are properly connected. 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. Refer to table 1-2 for input power requirements. Excessive input power may damage the amplifier WARNING Ensure the amplifier is turned off while disconnecting and reconnecting cables be-

tween the antenna interface and power measurement equipment. Failure to do so may cause damage to the equipment or personal injury. 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. Verify that the amplifier front panel switches are in the OFF position. 3. Turn on supply that provides +27 Vdc to the amplifier system. Do not apply an RF signal to the amplifier system 4. Place the ON - OFF circuit breaker on the amplifier in the ON position. Visually check the indicators on the amplifier module, and verify that the following indicators are on:

A. LPA DISAB. indicator (red) should be on. B. The +27VDC, +15VDC, +5VDC and -5VDC indicators (green) on the amplifier module should be on. 5. Set the RF ON switch to the ON (center) position. All red LEDs should turn off after six sec-

onds. 6. Follow the power setting procedure set forth in the amplifier subrack or system integration manual. Turn on external exciter/transceiver and apply RF input signals. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 3-4 September 2001

G3S-800-140-031 Installation & Service Manual Section 4 Principles of Operation 4-1 Introduction This section contains a functional description of the Multicarrier Cellular Amplifier. 4-2 RF Input Signal The maximum input power for all carrier frequencies should not exceed the limits specified in ta-

ble 1-2. For proper amplifier loop balance, the out of band components of the input signals should not exceed -40 dBc. The input VSWR should be 2:1 maximum (or better). 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. If the amplifier is operated into a filter, it will maintain its distortion characteristics outside the signal band even if the VSWR is infinite, provided the reflected power does not exceed one watt. A parasitic signal of less than one watt incident on the output will not cause distortion at a higher level than the normal forward distortion (i.e. -60 dBc). 4-4 G3S-800-140-031 Amplifier Module The G3S-800-140-031 amplifier is a linear, feed-forward power amplifier that operates in the 25 MHz frequency band from 851 MHz to 869 MHz. The amplifier modules are designed for parallel operation to achieve high peak power output, and for redundancy in unmanned remote locations. The amplifier module, figure 4-1, has an average output of 140 watts power (1400 watts peak power) with intermodulation products suppressed to better than -60 dBc below carrier levels. The amplifier provides an amplified output signal with constant gain and phase by adding approxi-

mately 30 dB of distortion cancellation on the output signal. Constant gain and phase is main-

tained by continuously comparing active paths with passive references, and correcting for small variations through the RF feedback controls. All gain and phase variations, for example those due to temperature, are reduced to the passive reference variations. Each amplifier module has an alarm and display board that monitors the amplifier performance. If a failure or fault occurs in an amplifier module, it is displayed on the individual amplifier front panel. The amplifier module is comprised of:

Predistorter Pre-amplifiers Main amplifier Error amplifier Two feed-forward loops with phase-shift and gain controls DC/DC power regulator Alarm monitoring, control and display panel The main amplifier employs class AB amplification for maximum efficiency. The error amplifier and feed forward loops are employed to correct signal nonlinearities introduced by the class AB main amplifier. The error amplifier operates in class AB mode. The RF input signals are ampli-

fied by a preamp and coupled to an attenuator and phase shifter in the first feed-forward loop. The main signal is phase shifted by 180 degrees and amplified in the premain amplifier. The out-

put from the premain amplifier is fed to the class AB main amplifier. The output from the main amplifier is typically 220 watts. The signal is output to several couplers and a delay line. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 4-1 September 2001 G3S-800-140-031 Installation & Service Manual The signal output from the main amplifier is sampled using a coupler, and the sample signal is combined with the main input signal and input to the second feed-forward loop. The error signal is attenuated, phase shifted 180 degrees, then fed to the error amplifier where it is amplified to a level identical to the sampled output from the main amplifier. The output from the error amplifier is then coupled back and added to the output from the main amplifier. The control loops continu-

ously make adjustments to cancel out any distortion in the final output signals. 1st Loop Phase & Gain Pre Dist Pre Main Main Amp FWD PWR

-40dB

-30dB Delay

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

+15 +5 -5 Power Supply

+27VDC Alarms & Display Smart Rack Front Panel Figure 4-1 G3S-800-140-031 Power Amplifier Module Functional Block Diagram The 2nd loop control section obtains a sample of the distortion added to the output signals by the main amplifiers, phase shifts the signals by 180 degrees, then feeds it to the error amplifier. There it is amplified to the same power level as the input sample and coupled on to the main out-

put signal. The final output is monitored by the 2nd loop and adjusted to ensure that the signal distortion and IMD on the final output is canceled out. 4-4.1 Main Amplifier The input and output of the amplifier employ two-stage, class AB amplifiers which provide ap-

proximately 32 dB of gain in the 25 MHz frequency band from 851 to 869 MHz. The amplifier op-

erates on +27 Vdc, and a bias voltage of +5 Vdc, and is mounted directly on a heat sink that is temperature monitored by a thermostat. If the heat sink temperature exceeds 90 C, a high tem-

perature fault occurs. The alarm logic controls the +5 Vdc bias voltage that shuts down the ampli-

fier. 4-4.2 Error Amplifier The main function of the error amplifier is to sample and amplify the signal distortion level gener-

ated by the main amplifier, to a level that cancels out the distortion and IMD when the error signal is coupled onto the main signal at the amplifier output. The error amplifier is a balanced multi-

stage, class AB amplifier, has 51 dB of gain, and produces up to an 80-watt output. The amplifier operates on 27 Vdc and a bias voltage of +5 Vdc, and is mounted directly on a heat sink. 4-4.3 Amplifier Monitoring In the main and error amplifier modules, all normal variations are automatically compensated for by the feedforward loop control. However, when large variations occur beyond the adjustment 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 4-2 September 2001 G3S-800-140-031 Installation & Service Manual range of the loop control, a loop fault will occur. The alarms are displayed on the front panel indi-

cators and output via a 21-pin connector on the rear of the module to the subrack summary board for subsequent remote monitoring via the ALARMS connector. Refer to paragraph 2-6 as well as figure 2-2 and table 2-3 for a description of the ALARMS connector. 4-4.4 Amplifier Module Cooling Although each amplifier module contains its own heat sink, it is cooled with forced air. Four fans are used for forced air-cooling and redundancy. The fans, located on the front and rear of the amplifier module, draw air in through the front of the amplifier and exhaust hot air out the back of the module. The fans are field replaceable. 4-5 Power Distribution Primary DC power for the system is provided by the host system to the MCR30829-1-3 Series subrack. The subrack supplies each amplifier module with +27 Vdc directly and via the RF power splitter/combiner. The amplifier module has a DC/DC converter that converts the +27 Vdc to +15 Vdc, +5 Vdc and -5 Vdc. 4-6 Intermodulation The G3S-800-140-031 amplifier is designed to deliver a 140-watt composite average power, mul-

ticarrier signal, occupying a bandwidth less than or equal to 18 MHz, in the bandwidth from 851 to 869 MHz. The maximum average power for linear operation, and thus the amplifier efficiency, will depend on the type of signal amplified. 4-6.1 Two Tone Intermodulation When measured with two equal CW tones spaced anywhere from 30 kHz to 18 MHz apart, and at any power level up to the average power, the third order intermodulation products will be be-

low -60 dBc. 4-6.2 Multitone Intermodulation Adding more tones to the signal will lower individual intermodulation products. If the frequencies are not equally spaced, the level of intermodulation products gets very low. When the frequen-

cies are equally spaced, those products fall on top of each other on the same frequency grid. The average power of all intermodulation beats falling on the same frequency is called the com-

posite intermodulation; it is -60 dBc or better. 4-7 Alarms The presence of several plug-in amplifier alarms can be detected at the DC and logic connector on the amplifier rear panel. Refer to table 2-3 and figure 2-2 for a description of the connector. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 4-3 September 2001

G3S-800-140-031 Installation & Service Manual Section 5 Maintenance 5-1 Introduction This section contains periodic maintenance and performance test procedures for the Multicarrier Cellular 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. Wear proper eye protection to avoid eye injury when using compressed air. WARNING Table 5-1 Periodic Maintenance Task Cleaning Air Vents Inspection Cables and Connec-

tors Interval 30 Days 12 Months Performance Tests 12 Months 5-3 Test Equipment Required For Test Action Inspect and clean per paragraph 5-4 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. Test equipment required to test the amplifier system is listed in table 5-2. Equivalent test equip-

ment may be substituted for any item, keeping in mind that a thermistor type power meter is re-

quired. 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. NOTE 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-1 September 2001 G3S-800-140-031 Installation & Service Manual Table 5-2 Test Equipment Required Nomenclature Manufacturer RDL Tenuline Signal Generator 30 dB Attenuator, 500 Watt Weinschel Corp. 20 dB Attenuator, 20 Watt

(2 each) Spectrum Analyzer Coax Directional Coupler Power Meter/Sensor Network Analyzer Current Probe H.P. H.P. H.P. H.P. 5-4 Cleaning Air Inlets/Outlets Model IMD-801D-03A 53-30-34 8560E 778D 437B/8481A 8753C The air inlets and outlets should be cleaned every 30 days. If the equipment is operated in a se-

vere dust environment, they should be cleaned more often as necessary. Turn off DC power source before removing fans. If dust and dirt are allowed to accumulate, the cooling efficiency may be diminished. Using either compressed air or a brush with soft bristles, loosen and remove accumulated dust and dirt from the air inlet panels. 5-5 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. NOTE The frequencies used in this test are typical for an amplifier with a 18 MHz band from 851 MHz to 869 MHz. Select evenly spaced F1, F2, F3, and F4 frequencies that cover the instantaneous bandwidth of your system. 5-5.1 Amplifier System Performance Test This test is applicable to the G3S-800-140-031 amplifier modules. To perform the test, proceed as follows:

1. Connect test equipment to the amplifier as shown in figure 5-1. NOTE Do not apply any RF signals at this time. Turn on signal generator and set frequency F1 to 854 MHz, F2 to 857 MHz, F3 to 863 MHz, and F4 to 866 MHz. Adjust each signal generator output so that the sum power output from all four signal generators equals -6 dBm at the input. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-2 September 2001 G3S-800-140-031 Installation & Service Manual

+27 Vdc Gnd Unit Under Test G3S-800-140-031 Plug-in Amplifier Module RF Out 30 dB Attenuator 500 W 20 dB Directionl Coupler 20 dB Attenuator 20 W Power Meter RF In Dir Co ect upl ion er l Att en ua tor 20 dB 20 W Spectrum Analyzer 8651E Sensor Head 8482A Filter /

Isotlator Signal Generator 10 dB Variable Attenuator Sensor Head 8482A Power Meter Figure 5-1 Amplifier System Test Setup Diagram Network Analyzer 8753C 5-5.1.1 Amplifier IMD Test And Current Test 2. Adjust attenuator for an input signal at -10 dBm. Turn on the amplifier by setting RF ON switch of amplifier. Adjust variable attenuator to set amplifier power output on power meter to 140 watts. Measure IMD on spectrum analyzer. IMD should be -60 dBc max. Record test data in table 5-3. Set RF ON switch to OFF. 3. With the amplifier module set at 140 watts power output, use the current probe (magnetic field type) and measure the dc current flow from the +27 Vdc power source. Current should be 70 amps maximum. Record test data in table 5-3. 5-5.1.2 Gain Test 4. Disconnect spectrum analyzer from test setup, and connect the network analyzer. 5. Set network analyzer as follows:

Power output to -10 dBm.

Frequency start to 869 MHz.

Frequency stop to 894 MHz.

Normalize the network analyzer for gain and return loss. 6. Check the gain across the band from 869 MHz to 894 MHz. Gain should be between 58 dB. Record test data in table 5-3. 5-5.1.3 Harmonics Test 7. With the power set at 140 watts power output, use the spectrum analyzer and check the fre-

quency band from 851 MHz to 869 MHz for harmonics. Harmonics should be 5 dBm maxi-

mum. Record test data in table 5-3. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-3 September 2001 G3S-800-140-031 Installation & Service Manual 5-5.1.4 Spurious Test 8. With the power amplifier set at 140 watts power output, use the spectrum analyzer and check the frequency band from 851 MHz to 869 MHz for spurious signals. Spurious signals should be -60 dBc maximum. Record test data in table 5-3. 5-5.1.5 Input Return Loss Test 9. Reset and turn on amplifier module. Read and record the S11 return loss measurement on network analyzer. Input return loss should be 16 dB maximum. Record test data in table 5-3. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-4 September 2001 G3S-800-140-031 Installation & Service Manual Table 5-3 Multicarrier Cellular Amplifier Test Data Sheet DATE _________________________________ AMPLIFIER S/N _________________________ TEST CONDITIONS:

Load and Source Impedance: 50 Ohms VSWR: < 1.2:1 Supply Voltage: +27 Vdc 1.0 Vdc TEST SPECIFICATION MIN 4-TONE IMD RF Gain Gain Flatness Harmonics Spurious Input Return Loss DC Power Vcc = 27 Vdc PO = 140 W Freq.: 853, 857, 863, and 866 MHz Vcc = 27 Vdc PO = 140 W Freq. = 860 MHz Vcc = 27 Vdc 1 Vdc PO =140 W 851-869 MHz Band Vcc = 27 Vdc PO = 140 W 851-869 MHz Band Vcc = 27 Vdc PO =140 W 851-869 MHz Band Vcc = 27 Vdc PO = 140 W 851-869 MHz Band Vcc = 27 Vdc PO = 140 W 4 Tones 57.5 dB

-0.5 dB MAX

-60 dBc 58.5 dB

+0.5 dB 5 dBm

-60 dBc

-16 dB 70 Amps DATA PASS _________________________________ FAIL ______________________________ Tested by ______________________________ 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-5 September 2001 G3S-800-140-031 Installation & Service Manual 5-6 Field Replaceable Parts And Modules The following parts and modules can be replaced in the field on site by a qualified technician with experience maintaining RF power amplifiers and similar equipment:

1. G3S-800-140-031 power amplifier modules 2. Cooling fans 5-6.1 G3S-800-140-031 Power Amplifier Module To replace a power amplifier module, proceed as follows:

1. Set both the RF ON On/Off/Reset switch and the power ON/OFF switch on the front panel of the amplifier module to OFF. 2. Loosen two screws that secure amplifier module to subrack. 3. Use handle on front of module, and with a steady even pressure, pull module out of subrack. CAUTION When removing the amplifier from the subrack, it is very important to support the amplifier such that the rear of the module does not suddenly drop when it disengages from the track. A drop such as this could damage the module. 5-6.2 Cooling Fans To replace a cooling fan, proceed as follows:

1. Remove amplifier module from subrack; see paragraph 5-6.1 preceding. 2. Loosen four snap fasteners that secure fan to amplifier module. Disconnect fan power con-

nector from amplifier module. Install replacement in reverse order of steps 1 and 2 above. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 5-6 September 2001

G3S-800-140-031 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 Pow-

erwave 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 Troubleshooting The following are general guidelines established to aid Field Engineers or Cell Site Technicians in the proper method of Powerwave equipment fault resolution by fault mode. 6-2.1 DC Voltage Indicators Not Illuminated 1. Check the front panel ON/OFF switch. 2. Check the power plant circuit breaker. 3. Check for +27 + 1.0 VDC at the amplifier subrack input. A. B. If the voltage is low, verify that all DC connections between the power plant and the amplifier subrack are tight. If the voltage is correct, 1. Remove the amplifier from the subrack slot and move the amplifier to another am-

plifier subrack slot. 2. Check the voltage on the power pins of the mating amplifier and amplifier subrack connector. 3. Verify that the amplifier DC connections are not damaged. 4. Return the amplifier to the factory for repair. 6-2.2 OVER PWR Illuminated or Blinking 1. 2. If all the amplifiers in a given amplifier subrack are in Over Pwr and the LPA Disable LED is illuminate, then the input RF power level is too high and the amplifiers have been turned off. RF power may be incorrectly set during equipment commissioning. This may be due to a faulty jumper cable. Verify the amplifier subrack output cables, transmit filter, and directional coupler are in proper working order. The loss between the amplifier subrack and the hatch plate is typically less than 2.0 dB. If all the amplifiers in a given amplifier subrack are in Over Pwr and the LPA Disable LED is not illuminated, then the input RF power level is too high. The amplifier subrack is attempting to maintain a safe power output level (smart subracks with True RMS power detectors and voltage variable attenuators only). RF power may be incorrectly set during equipment com-

missioning. This may be due to a faulty jumper cable. Verify the amplifier subrack output ca-

bles, transmit filter, and directional coupler are in proper working order. The loss between the amplifier subrack and the hatch plate is typically less than 2.0 dB. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 6-1 September 2001 G3S-800-140-031 Installation & Service Manual 3. If only one or two amplifiers in a given amplifier subrack are in Over Pwr and the LPA Dis-

able LED is blinking, then the amplifier subrack is probably in Sleep Mode (smart subracks with True RMS power detectors and voltage variable attenuators only). A. Pressing the On/Off/Reset switch momentarily in the Up position or cycling DC power on the amplifier should bring the amplifier back on-line. B. Sleep Mode firmware may be disabled in the field with a PC interface and software available from Powerwave. 4. Move the amplifier to another slot in a different subrack, if available. Mark the amplifier with a sticker or place a tie wrap on the handle to identify the amplifier. Monitor for future failure. A. B. If the same amplifier fails again, return the amplifier to the factory for repair. If the replacement amplifier in the original subrack fails, replace the amplifier subrack. 6-2.3 HIGH TEMP Illuminated 5. If an amplifier is in HIGH TEMP and the LPA Disable LED is illuminate, then the amplifier heat sink temperature is too high. This may be due to:

A. High ambient temperature. B. Fan failure. C. Insufficient air-volume capacity. Most of Powerwaves amplifiers require a certain amount of free-space to allow proper airflow. 6. Correct the heat problem, then reset the amplifier by momentarily pressing the Reset button on the amplifier front panel up. 6-2.4 VSWR Illuminated 7. 8. If all the amplifiers in a given amplifier subrack are in VSWR and the LPA Disable LED is il-

luminate, then the output RF reflected power level is too high and the amplifiers have been turned off. This may be due to a faulty jumper cable or transmit filter. Verify the amplifier subrack output cables, transmit filter, and directional coupler are in proper working order. The loss between the amplifier subrack and the hatch plate is typically less than 2.0 dB. This fault normally occurs during site or just following site power setting and normally takes about 10 to 15 minutes to reveal itself. This fault may not occur at low power levels (i.e. when just one or two channels are up). If one amplifier in an amplifier subrack is in VSWR and the LPA Disable LED is illuminated, then the output RF reflected power level is too high for that amplifier. This may be due to A. A damaged or recessed amplifier RF output connector. Return the amplifier to the fac-

tory for repair. Mishandling of the amplifier normally causes recessed pins. Before installing an ampli-

fier, look at the D-sub connector to ensure none of the pins are recessed, bent or that the outer connector shield is not damaged. When installing the amplifier, do not force the amplifier into the slot. Gentle even pressure is all that is needed to properly seat the amplifier. Improper seating of the amplifier. 1. Ensure the amplifier thumbscrews are properly tightened. 2. Try seating the amplifier in another subrack slot. 3. Try seating the amplifier in a subrack in another sector. B. 6-2.5 DC FAIL Illuminated 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 6-2 September 2001 G3S-800-140-031 Installation & Service Manual If an amplifier is in DC FAIL and the LPA Disable LED is illuminate, then one of the four amplifier DC voltages is either out of tolerance or not present. Return the amplifier to the factory for repair. 6-2.6 FAN FAIL Illuminated If an amplifier is in FAN FAIL, then the one of the amplifiers cooling fans has failed. Replace the fan. Fan failure does not cause the amplifier to shut down; amplifier shut down is determined by heat sink temperature. 6-2.7 LOOP FAIL Illuminated 9. Loop Fail is always accompanied by LPA Disable LED illuminated. This may be due to Inability of the amplifier to maintain a 180 phase shift between the first and second loops. A. B. A damaged error amplifier. This can be caused by 1. Out of band spurious or intermods being applied at too high of a level at the ampli-

fier input port. An input band-pass filter may be necessary to correct this problem. 2. Disconnecting amplifier RF output cables while the amplifier is still turned on. Al-

ways turn the amplifier off when moving output RF cables from the hatch plate to test equipment and back again. C. Improper power balance between amplifiers in a given subrack. 1. Ensure the amplifier thumbscrews are properly tightened. Reset the amplifier by momentarily pressing the Reset button on the amplifier front panel up. 2. Try seating the amplifier in another subrack slot. 3. Try seating the amplifier in a subrack in another sector. 6-2.8 LOW PWR Illuminated Low Power is always accompanied by the LPA Disable LED illuminated. This is due to the gain of either the internal preamplifier or main amplifier being 0.5 dB (typically) or more below the ampli-

fier specification. The amplifier should be returned to the factory. 6-2.9 LPA DISABLE Illuminated 10. LPA Disable LED illuminated indicates that the amplifier RF section is turned off. This may be due to A. An accompanied alarm indicating a critical amplifier fault (i.e. Loop Fail fault). B. A response to a subrack command, purposely inhibiting the amplifier (i.e. Sleep Mode activation) Improper seating of the amplifier in the subrack. C. 11. Ensure the amplifier thumbscrews are properly tightened. Reset the amplifier by momentar-

ily pressing the Reset button on the amplifier front panel up. 12. Try seating the amplifier in another subrack slot. 13. Try seating the amplifier in a subrack in another sector. 6-3 Return For Service Procedures 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 6-3 September 2001 G3S-800-140-031 Installation & Service Manual 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. 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved 6-4 September 2001

851-869 MHz G3S-800-140-031 Installation & Service Manual Multi-Carrier Power Amplifier 851 869 MHz 140 Watts Average Power

-65 dBc Intermodulation Distortion 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved September 2001 G3S-800-140-031 Installation & Service Manual 2001 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. September 2001 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 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved ii September 2001

Par. No. 1-1 1-2 1-3 1-4 1-5 3-1 3-2 3-3 G3S-800-140-031 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 Equipment Changes ...................................................................................................................... 1-1 Ordering Information.................................................................................................................... 1-2 Section 2 Installation Introduction................................................................................................................................... 2-1 2-1 Electrical Service Recommendations............................................................................................ 2-1 2-2 Unpacking and Inspection............................................................................................................. 2-1 2-3 Installation Instructions................................................................................................................. 2-2 2-4 2-5 Amplifier Module Connectors ...................................................................................................... 2-2 2-5.1 Amplifier Module Status, Alarm, Control, and Power Connector................................................ 2-3 2-5.2 Amplifier Module RF Connector.................................................................................................. 2-4 Introduction................................................................................................................................... 3-1 Location and Function of Amplifier Module Controls and Indicators.......................................... 3-1 Initial Start-Up and Operating Procedures.................................................................................... 3-4 Section 3 Operating Instructions Section 4 Principles of Operation Introduction................................................................................................................................... 4-1 4-1 RF Input Signal............................................................................................................................. 4-1 4-2 RF Output Load ............................................................................................................................ 4-1 4-3 G3S-800-140-031 Amplifier Module ........................................................................................... 4-1 4-4 4-4.1 Main Amplifier ............................................................................................................................. 4-2 4-4.2 Error Amplifier ............................................................................................................................. 4-2 4-4.3 Amplifier Monitoring.................................................................................................................... 4-2 4-4.4 Amplifier Module Cooling............................................................................................................ 4-3 Power Distribution........................................................................................................................ 4-3 4-4.5 Intermodulation............................................................................................................................. 4-3 4-4.6 4-4.7 Two Tone Intermodulation ........................................................................................................... 4-3 4-4.8 Multitone Intermodulation ............................................................................................................ 4-3 4-4.9 Alarms........................................................................................................................................... 4-3 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved iii September 2001 G3S-800-140-031 Installation & Service Manual Section 5 Maintenance Introduction................................................................................................................................... 5-1 5-1 Periodic Maintenance.................................................................................................................... 5-1 5-2 Test Equipment Required For Test ............................................................................................... 5-1 5-3 Clean Air Inlets/Outlets ................................................................................................................ 5-2 5-4 5-5 Performance Test .......................................................................................................................... 5-2 5-5.1 Amplifier System Performance Test............................................................................................. 5-2 5-5.2 Amplifier IMD Test .......................................................................................................................5.3 5-5.3 Gain Test....................................................................................................................................... 5-3 5-5.4 Harmonic Test............................................................................................................................... 5-4 Spurious Emissions Test............................................................................................................... 5-4 5-5.5 5-5.6 Input Return Loss.......................................................................................................................... 5-4 5-6 Field Replacement Parts and Modules.......................................................................................... 5-6 5-6.1 G3S-800-140-031 Power Amplifier Module ................................................................................ 5-6 5-6.2 Cooling Fans................................................................................................................................. 5-6 Troubleshooting Section 6 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. 1-1 2-1 2-2 2-3 3-1 4-1 5-1 Table No. 1-1 1-2 2-1 2-2 3-1 3-2 5-1 5-2 5-3 G3S-800-140-031 Front and Side View ....................................................................................... 1-3 G3S-800-140-031 Rear View ....................................................................................................... 2-2 DC and Logic Connector .............................................................................................................. 2-3 Amplifier RF Connector ............................................................................................................... 2-4 G3S-800-140-031 Amplifier Module RF Control Indicators ....................................................... 3-1 G3S-800-140-031 Power Amplifier Module Functional Block Diagram..................................... 4-2 Amplifier System Test Setup Diagram ......................................................................................... 5-3 List Of Tables Major Amplifier Components....................................................................................................... 1-2 G3S-800-140-031 MCPA Functional Specifications ................................................................... 1-2 Amplifier Module DC and Logic Connector Definition............................................................... 2-3 Amplifier RF Connector Definition.............................................................................................. 2-4 Amplifier Module RF Control and Indicators Definition ............................................................. 3-2 Amplifier Module Alarm Indicators Definition............................................................................ 3-3 Periodic Maintenance.................................................................................................................... 5-1 Test Equipment Required.............................................................................................................. 5-2 MCPA Test Data Sheet................................................................................................................. 5-5 044-05095 Rev. A Copyright Powerwave Technologies, Inc., September 2001. All rights reserved iv September 2001