FCC ID: E675JS0028

{\ /\ 1 POWERWAVE. INSTALLATION & SERVICE MANUAL LDA9301-30 30-WATT LINEAR DISCREET AMPLIFIER 935-940 MHz 12 June 1998 Powerwave Technologies, Inc. Tel: 949-757-0530 2026 McGaw Avenue Fax: 949-757-0941 Irvine, CA 92614 Web Site: www.pway.com 044-05041 Rev. A Par. mona

RwWN A on 2-1 2-2 2-4 3-1 3-3 4-4 4-2 4-4 4-5 4-5.1 4-5.2 4-53 45.4 4-6 TABLE OF CONTENTS Section 1 Page General Description No. Introduction... oc cecpuscuttadureenuetteesneeeeneerensnsnentys 4-1 General Description...... Ad Functional and Physical Specifications. 4-1 Equipment Changes 41-1 Ordering Information 1-2 Section 2 Installation Introduction Electrical Service Recommendations ..... Unpacking and Inspection .. installation Instructions .... Section 3 Operating Instructions Introduction Location and Function of Amplifier Control and Indicators .. Initial Start-Up and Operating Procedure... cee irs:

Section 4 Principles of Operation UntrOGUCtiOn oc. se ssc. -secceessvessesesesesssnnensneneececeeesnennetanananssanenssgssgnee OSS SSS TTT 4-1 RF Input Signal. RF Output Load ... Functional Description ... LDA9301-30 Amplifier... Main Amplifier ... 4-4 Loop Control .... ee 44 Bypass Mode....... i 44 Amplifier Cooling. 4-4 Power Distribution .......scsseecsessessesseessssneneetsenenesnenenn ets FIT 4-5 044-05041 Rev. A ii TABLE OF CONTENTS (Continued) Section 5 Maintenance 5-1 Introduction .......0..0cc ete 5-2 Periodic Maintenance ............--

5-3 Test Equipment Required for Test. 5-4 Cleaning air Inlets/Outlets.......... 5-5 Performance Test...........-+-

5-5.1. Amplifier Performance Test. 5-6 Field Replaceable Parts....... 5-6.1 LDA9301-30 Amplifier... 5-6.2 5-6.3 Section 6 Troubleshooting 6-1 Introduction ..........-5 6-2 Troubleshooting ........ 6-3 Return for Service Procedure ... 6-3.1 Obtaining an RMA... 6-3.2 Repackaging for Shipment .... LIST OF ILLUSTRATIONS Figure Page No. No. 1-3 1-1 LDAQ301-30 Amplifier .....e.eececccceceeesecsscseseeeestsr estes srenenrnnnnss sess SSS TTT 2-1 LDA9301-30 Amplifier, Rear View .... 4-1 LDA9301-30 Amplifier interconnect Diagram .... 4-2 4-2 LDA9301-30 Amplifier Block Diagram .. AD 5-1 Amplifier Test Setup Die grearn ccc eosesseesssenteensceceeeeteeseneeetsenne nee ete 5-3 LIST OF TABLES Table Page No. No. 4- Major Amplifier Components 4 4-2 LDA9301-30 Amplifier Functional Specifications 4 Amplifier Control and Indicators... 5-1 Periodic Maintenance ........ 5-2 Test Equipment Required .. 6-1 Troubleshooting ccccueeustensneceeesevecsenerecseennents 044-05041 Rev. A iii GENERAL DESCRIPTION oo 4-1. INTRODUCTION This manual contains information and procedures for installation, operation, and maintenance of Powerwaves 30-watt LDA9301-30 Linear Discrete 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 4-2. GENERAL DESCRIPTION The LDA9301-30 is a single channel linear discrete power amplifier that operates from 935 to 940 MHz. The amplifier is modular in design, and is ideally suited for use in RAM-Mobitex base stations. The LDA9301-30 provides 30 watts of RF power, a 12-volt auxiliary output connection, and a fail-safe bypass mode. The amplifier consists of a DC power supply, a microprocessor control circuit, and a single stage of amplification to provide a gain minimum of 10 dB. The microprocessor control circuit controls all fail-safe bypass modes that provide protection in the event of an RF overpower input/output, an over-temperature, or loss of AC power. 4-3. FUNCTIONAL AND PHYSICAL SPECIFICATIONS Functional and physical specifications for the LDA9301-30 amplifier are listed in table 1-2. 4-4, EQUIPMENT CHANGES Powerwave Technologies, Inc. reserves the right to make minor changes to the equipment without notice, including but not necessarily limited to component substitution and circuitry changes. Such changes may or may not be incorporated in this manual, although it is our intention to keep each manual as up-to-date as possible. To that end, we ask that you, our customer, share with us information acquired in field situations which might be of assistance to another user. \f you share it with us, we'll pass it around. 044-05041 Rev. A 1-1 4-5. ORDERING INFORMATION Table 1-1 following gives the pa entire amplifier or a replacement fan. rt numbers and descriptions to be used when ordering either an Table 1-1. Major Amplifier Components LDA9301-30 MODEL NUMBER DESCRIPTION 30-Watt Linear Discreet Amplifier, 935-940 MHz. 800-00838-001 Fan Assembly. Table 1-2. LDA9301-30 Amplifier Functional Specifications Frequency Range Gain Gain vs. Frequency Second Harmonic Operation Mode Bypass Mode Modulation Format 935-940 MHz. 40 dB minimum at 30 watts output (44.8 dBm)

+0.25 dB

<60 dBc Single channel Engages on overtemperature shutdown, loss of AC power, or loss of input power. GMSK, CW Noise Power Output -90 dBm Output Power Range 20-44.8 dBm VSWR $11, S22 <1.5:1 Operating Voltage Current Draw Operating Temperature Range Storage Temperature Range Auxiliary Output Connectors 120 Vac, 47-63 Hz 2.5 amps maximum 0C - +60 C

-40 C - +85 C

+12 Vdc + 0.25 V, 500 mA Dimensions (see figure 1-1)

*30-inch mating extension provided 044-05041 Rev. A RF Type N Female mounted at rear of chassis AC TMale IEC 320 mounted at rear of chassis DC (Auxiliary Output)* Radio Shack number 274-222 Cooling Fan with air intake at the front of the unit LED Display POWER ON (green), AMP ON (green) Fuses AG line: 3A. 250 V, AGC-3 DC Auxiliary: 1A, 250 V, AGC-1 Width: 19 inches Height: 5.22 inches Depth: 12.38 inches (includes handles) 1-2 INSTALLATION ooOeeeeSSOOOe 2-1. INTRODUCTION This section contains installation recommendations, unpacking, inspection, and installation instructions for the LDA9301-30 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. [tis important that the licensee perform these tasks correctly and in good faith. If applicable, carefully read Parts 73 and 74 of the Federal Communications Commission (FCC) rules to determine how they apply to your installation. DON'T TAKE CHANCES WITH YOUR LICENSE. 2-2, ELECTRICAL SERVICE RECOMMENDATIONS Powerwave Technologies recommends that proper AC line conditioning and surge suppression be provided on the primary AC input to the amplifier. All electrical service should be installed in accordance with the National Electrical Code, any applicable state or local codes, and good engineering practice. Special consideration should be given to lightning protection of all systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors are recommended in the service entrance. Straight, short ground runs are recommended. The electrical service must be well grounded. Each amplifier system should have its own circuit breaker, so a failure in one does not shut off the whole installation. Circuit breakers should be thermal type, capable of handling an inrush current of 5 amps per amplifier, in a load center with a master switch. 2-3. UNPACKING AND INSPECTION This equipment has been operated, tested and calibrated at the factory. Only in the event of severe 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. CAUTION Exercise care in handling equipment during inspection to prevent damage caused by rough or careless handling. Visually inspect the amplifier module for damage that may have occurred during shipment. Check for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous packing material in the connector or fans. Inspect the rear panel connector for bent connector 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. Powerwave may not accept returns without a return authorization. Claims for loss or damage may not be withheld from any payment to Powerwave, nor may any payment due be withheld pending the outcome thereof. WE CANNOT GUARANTEE THE FREIGHT CARRIER'S PERFORMANCE. 044-05041 Rev. A 2-1 2-4. INSTALLATION INSTRUCTIONS (Refer to figures 1-1 and 2-1) The LDA9301-30 amplifier is designed for installation in a rack or cabinet that permits access from the rear for connection of AC power, RF, and auxiliary 12 Vdc cables and for fuse replacement. To install the amplifier proceed as follows:

1. 2. 9. Insert amplifier in equipment rack or cabinet and secure in place with four screws. Connect 50-ohm antenna cable to RF OUTPUT connector on rear of amplifier. Connect the transceiver/exciter output to RF INPUT connector on rear of amplifier. Connect 30-inch 12 Vdc cable to 12VDC connector on rear of amplifier, if it is to be used. WARNING Verify that the LINE switch on the front of the amplifier is in the off () position before applying AC power to the amplifier. Perform step 5 (following) before connecting the AC line cord to the power source. Connect AC line cable to power connector J1 on rear of amplifier. Check your work before applying AC voltage to the system. Make certain all connections are tight and correct, and that the front panel on/off switch is in the off () position. The AC line cord may now be plugged into the AC power outlet. Refer to section 3 for initial turn-on and checkout procedures. 044-0504! Rev. A 2-2 0044-05041 Rev. A 2-3 PRINCIPLES OF OPERATION SS eoooooooOoeeeEeEeEeEEEEEEEEEEE>EEEEE 4-1. INTRODUCTION This section contains a functional description of the LDA9301-30 Amplifier. 4-2. RF INPUT SIGNAL The LDA9301-30 amplifier has a power amplifier module that provides a minimum of 10 dB of gain. A microprocessor uses detector circuitry to detect RF power and provide bypass mode protection in the event of an RF input/output overpower situation, an overtemperature situation, the loss of AC power, or an amplifier module failure. Input VSWR to the LDA9301-30 should not exceed 2:1 for best performance. 4-3. RF OUTPUT LOAD The load impedance should be as good as possible (2:1 or better) in the working band for good power transfer to the load. 4-4. FUNCTIONAL DESCRIPTION The LDA9301-30 amplifier (see interconnect diagram figure 4-1 and block diagram figure 4-2) is a linear, single channel amplifier that operates in the frequency band from 935 MHz to 940 MHz. The amplifier specifications are listed in table 1-2. Each amplifier is self-contained and is functionally independent of other amplifiers. The amplifier is designed to achieve high peak power output, and for redundancy in unmanned remote locations. Each amplifier in the system can simultaneously transmit carrier frequencies at an average total power output of 30 watts. 0044-05041 Rev. A 4-1 welbeiq yoolg Jeyl|duiy O-LOs6Wa71 Z-v enbi4 VS OZ (O If os | [ oa || , Nv Ali+

JOssa.0/dOIOIYy JOSUaS ouueyL | ;

Wy ule;

cy

-O o ~ oe - 4 O _.- - - feo :

WO 4y om rom | i ul 4u youl i anu Aejoy | 7 aren moo | Lae |

oe ae 7H 9-Lb L A\ddng a o 2tous ove) BME A0SZ WE 044-0504] Rev. A 4-5, LDA9301-30 AMPLIFIER The amplifier has an output of 30 watts power with 2nd harmonics suppressed to better than -60 dBc below carrier tevel. The amplifier is comprised of:

Microprocessor board/alarm monitoring One gain stage Display LEDs Power Supply 4-5.1. MAIN AMPLIFIER The input and output of the amplifier utilizes a single-stage, class AB amplifier module which provides approximately 10 dB of gain in the MHz frequency band from 935 MHz to 940 MHz. The module contains two fail-safe SPDT relays that operate such as to provide the amplification mode and the bypass mode. A driver circuit operates the two relays. The amplifier module operates on +27 Vdc, and a bias voltage of +5 Vdc, and is mounted directly on a heat sink. The alarm logic controls the +5 Vdc bias voltage which shuts down or turns on the main amplifier. A TTL signal controls the relay driver circuit. 4-5.2. LOOP CONTROL The loop control circuitry consists of a microprocessor (see paragraph 4-2), which monitors the RF output power and provides the bypass mode protection in the event of an RF input/output overpower situation, an overtemperature situation, the loss of AC power, or an amplifier module failure. The RF output power from the model LDA9301-30 amplifier is monitored by the microprocessor. A coupled detector monitors the final RF output level and generates a DC voltage (VFWD) proportional to the RF output level. VFWD is fed back to the microprocessor. The microprocessor compares this voltage to a reference voltage and determines whether the main amplifier is working properly or not. The microprocessor also provides over-temperature protection for the amplifier. The RF module in the amplifier is mounted on a heatsink. The module has a temperature-sensing IC mounted on it which constantly monitors heat and converts it to a DC voltage. This voitage is sent to the microprocessor which shuts down the amplifier should the temperature exceed the specified temperature range. When the amplifier has sufficiently cooled down, the microprocessor re-enables the amplifier. 4-5.3. BYPASS MODE immediately after the amplifier is turned on, the unit will initialize in bypass mode for five seconds to detect any fault. Subsequently, the bypass mode is engaged on an overtemperature shutdown, loss of AC power, or loss of input power; the green AMP ON front panel LED will go off. The unit will then attempt to restart approximately every 15 minutes after fault detection. Cycling power will restart the unit and, if successful, the green AMP ON front panel LED will come on. Power level shutdown threshold is factory-set at 23 dBm with an internat adjustment capability of up to 43 dBm. Output power detection assumes that input power will be present during all normal operational modes. Loss of input power will result in loss of output power, causing the bypass to engage. 4-5.4. AMPLIFIER COOLING Although the amplifier module contains its own heat sink, it is cooled with forced air. A fan, located on the front of the amplifier and operating continuous duty from internally applied DC, provides forced air cooling by drawing ambient air in through the front of the amplifier and exhausting hot air out the rear of the amplifier. The fan is field replaceable. 044-05041 Rev. A 4-4 4-6. POWER DISTRIBUTION Primary AC power (120 Vac 47-63 Hz) for the LDA9301-30 amplifier is provided by the host system. The AC input is fused at three (3) amps. The unit has a built-in power supply that provides all internal power required. In addition, 12 Vdc is also provided at the rear of the amplifier at the 12VDC connector; it is fused at one (1) amp. 044-05041 Rev. A 4-5 MAINTENANCE 5-1. INTRODUCTION This section contains periodic maintenance and performance test procedures for the LDA9301-30 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. WARNING Wear proper eye protection to avoid eye injury when using compressed air. Table 5-1. Periodic Maintenance TASK INTERVAL ACTION Cleaning Air Vents 30 Days Inspect and clean per paragraph 5-4 Inspection Cables and 12 Months Inspect signal and power cables for Connectors frayed insulation. Check RF connectors to be sure that they are tight. Perform annual test per paragraph 5-5. Performance Tests 412 Months 5-3. TEST EQUIPMENT REQUIRED FOR TEST Test equipment required to test the amplifier system is listed in Table 5-2. Equivalent test equipment may be substituted for any item. NOTE All RF test equipment must be calibrated to 0.05 dB resolution. Any deviation from the nominal attenuation must be accounted for and factored into all output readings. 044-05041 Rev. A 5-1 Table 5-2. Test Equipment Required NOMENCLATURE MANUFACTURER MODEL Signal Generator HP. 8648B 30 dB Attenuator, 150 Watt Narda Low Pass Filter K&L Microwave, Inc. HP3L 340-1100 N/NP Spectrum Analyzer H.P. 8562E 20 dB Directional Coupier HP Power Meter / Sensor H.P. 437B / 8482A Linear Discreet Amplifier, 40 dB Power Gain tsolator 5.4, CLEANING AIR INLETS/OUTLETS The air inlets and outlets should be cleaned every 30 days. If the equipment is operated in a severe dust environment, they should be cleaned more often as necessary. Disconnect AC 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 1-2. Also verify system performance after any amplifier 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 band from 935 MHz to 940 MHz. 5-5.1. AMPLIFIER PERFORMANCE TEST. This test is applicable to a subrack equipped with one to five plug-in LDA9301-30 amplifier modules. Perform the tests applicable to your system. To perform the test, proceed as follows:

4. Connect test equipment as shown in figure 5-1. NOTE Set the offset of the power meter properly. 2. Turn on signal generator and set frequency to 937.5 MHz. 3. Set input power to unit under test (UUT) at 32.0 dBm. 4. Turnon120V AC. GAIN TEST 5. Verify that power to the UUT is set for 32.0 dBm. 6. Verify that the UUT delivers a minimum of 42.0 dBm. 2 HARMONIC TEST 7. With the power amplifier set at 30 watts (44.8 dB) power output, use the spectrum analyzer and check the frequency band from 935 MHz to 940 MHz for 2" harmonic. The 2" harmonic should be -60 dBc maximum. 044-05041 Rev. A 5-2 J9}OW HEM JaMog jndjInO wes6eiq dnjes jse] seyydwy 1-g anbi4 JezAjeuy winijoads Ja\dnoo gP 0z-

Joyenuayy aP 0 Lan JoyeJBUSS) jeubis JO} HEM JaMOd

+ (aauq) jnduj 1 I

JHA dT Jajdnoo gp 0z-

duy JOJEIQUaD jeubis Joye[os|

vat 5-3 0044-05041 Rev. A 5-6. FIELD REPLACEABLE PARTS The following parts can be replaced in the field on site by a qualified technician with experience maintaining RF power amplifiers and similar equipment:

1. LDA9301-30 Amplifier 2. Cooling Fan 3. 1- and 3-Amp Fuses 5-6.1. LDA9301-30 AMPLIFIER To replace an LDA9301 amplifier, proceed as follows:

Disconnect AC line cord from rear of amplifier. Disconnect RF INPUT and RF OUTPUT lines. Disconnect 12VDC line if connected. Loosen four screws that secure amplifier module to rack or cabinet. RWON>

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 the guide rail disengages from the track. A drop such as this could damage the rear of the amplifier. 2. Use the handles on the front of the module, and with a steady even pressure, pull the module out of the rack or cabinet. 5-6.2. COOLING FAN To replace the cooling fan, proceed as follows:

1. Verify that AC LINE switch is in the O position. 2. Pull out four snap-fastener plungers that secure fan to amplifier module. Disconnect fan power connector from amplifier module. 3. Install replacement fan in reverse order of steps 1 and 2 above. 5-6.3, FUSES The LDA9301-30 amplifier is equipped with two fuses, both located on the rear panel, as follows:

120 Vac INPUT 12 Vdc OUTPUT F1 F2 Manufacturer: Bussman Bussman Manufacturer's Number: AGC-3 AGC-1 Rating: 3 amps, 250 V 1 amp, 250 V Size: 4/4 inch diameter 1/4 inch diameter 4-1/4 inches long 1-1/4 inches long 944-05041 Rev. A 5-4 TROUBLESHOOTING 6-1 INTRODUCTION This section contains a list of problems which users have encountered and a few suggested actions that may correct the problem. If the suggested corrective action does not eliminate the problem, please contact your Powerwave field representative or the factory for further instructions. NOTE Check your sales order and equipment warranty before attempting to service or repair the unit. Do not break the seals on equipment under warranty or the warranty will be null and void. Do not return equipment for warranty or repair service until proper shipping instructions are received from the factory. 6-2 TROUBLESHOOTING Refer to table 6-1 for troubleshooting suggestions. Table 6-1. Troubleshooting. SYMPTOM SUGGESTED ACTION Verify that LINE switch is in the on (O) position Check that power connection is secure. Check 3-amp fuse F1 on rear of amplifier. Check for proper AC line voltage. Check that RF INPUT connector is properly attached. Verify that RF input signal is present. Verify that RF input power is in operational range. If steps 1-3 are not effective, wait 15 minutes and repeat;

bypass mode may have been activated. POWER ON indicator (green) is not lit AMP ON indicator (green) is not lit RwWNARWN>

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 Customer Service Department at

(949) 757-0530 to obtain this number. Failure to obtain this RMA number will result in considerable 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 Powerwave's Customer Service Department for packing materials and information. 044-0504] Rev. A 6-1