TPL Communications 2-2AC RF Power Amplifier User Manual

TPL Communications Inc RF Power Amplifier

User Manual

II~ e~~~~II USERMANUALI MID-BAND VHFI CONTINUOUS DUTYI POWER AMPLIFIERSIIIII3370 SAN FERNANDO ROAD., #206I LOS ANGELES, CA 90065TEL: (323)256-3000 FAX: (323)254-3210I www.tplcom.comIIL-P A2- 2AX -RXRPS/RSPS- L5I
I-~l TABLE OF CONTENTSII .GENERAL SPECIFICATIONS 2OPERATING PRECAUTIONS 4IINSTALLATION 4I REMOTEMONITORING 5,1 OPERATOR ADJUSTMENTS 6.WARRANTY 8DI,I,- cI .',IIIIIII
I-GENERAL SPECIFICATIONS[ I FREQUENCY RANGE: 72-76 MHzMODEL POWER INPUT POWER OUTPUT DC CURRENT DRAINI PA2-2AB-RSPS-P 0.5-1 W 10 W 1.5 Amps.PA2-2AC-RXR-PS-P 0.5-1 W 60 W 4 Amps.I OPERATING MODE:.I FM/CWOPERATING VOLTAGE:I 110 VAC"c,,.:1 EIA DUTY CYCLE:100% I ContinuousI HARMONIC AND SPURIUS EMISSIONS ATTENUATION:1 Meets or exceeds FCC Certification requirements.:1 IN/OUT IMPEDANCE:50 Ohms.1 IN/OUT RF CONNECTORS:1 Type "N"RECEIVER PATH INSERTION LOSS:1 1 dB maximum11I,I Page 2.1
IIGeneral Specifications(continued)II OPERATING TEMPERATURE:I -200 to +500 Celsius.I STORAGE TEMPERATURE:-400 to +850 Celsius.I OPERATING HUMIDITY:':1 0% -85% RH (non-condensing).STORAGE HUMIDITY:I 0% -95% RH (non-condensing).IIIIIIIII~ Page 3I
I-OPERATING PRECAUTIONSfJCAUTION: This amplifier produces RF voltages that can cause painful and dangerousl RF burns. Use caution! Connect and disconnect all RF connections withthe DC power and drive power off.I DRIVE POWER: RF power transistors, although quite rugged in most respects, are easilydamaged by overdrive. Be careful no to overdrive this amplifier, even forIan instant. Higher than rated drive power may destroy the transistor andVOID ANY WARRANTY.ITERMINATIONS: The efficiency of this amplifier will degrade if it is operated into anythingbut a 50 Ohm load. Lowered effeciency may mean any, or all, of the following: lower power output, increased current drain, higher opearating tem-1 perature, and reduced life time.1 INSTAllATION~ This unit is designed for mounting in a standard 19" rack. When picking a location in the rack,cosideration must be given to the RF power output cable lengths, as well as cooling consider-I ations.Mount the unit where dust and other debris are not likely to clog the cooling fins. Avoid mount-ling the amplifier directly above hot pieces of equipment that could artificially raise the amplifi-ers temperature.IConnect the radio tranmsitter to the "RF INPUT" connector with a 50 Ohm c.~ble ~nd a type, "N" plug. Connect the antenna to the "RF OUTPUT" connector on the amplifier with 50 Ohmcoaxial cable and a type "N" plug.I Plug the AC line cord into the system AC power receptacle.1 For safety, ensure that the rack and all equipment connected to the amplifier have properACgrounds. Do not rely on coaxial cable shielding. Assure the installation has proper lightningprotection (e.g. in line coaxial protectors manufactured by PolyPhaser Corporation or equiva-::1 lent).III Page 4I
I-REMOTE MONITORING11 The monitored functions are described in other sections. These same functions are available atthe REMOTE MONITOR OB-9 connector on the rear panel. The outputs are as follows:I Monitor SignalsIIChassisGNO 1 Ground and SignalGround'I Reflected 8 V max, 1Am maxVRM 2 Power Buffer Analog alarm on =I Monitor 5.0 VP h T A t" 0.5 mAus -0-- c lVeI PTT 3 Talk Input Low 5 V max maxIOver 0 A t.20 mAen c lVeOTMP 4 Temperat- CPII t L 30 V max maxAI 0 ec or owure armI 20 mAVCC 5 +5 Volts Reference Supply +5 VOC maxI.20mARFON 6 RF Input Open ActIVe 30 V max maxI On Collector LowIForward 5 V @ 1A" m maxVFM 7 Power Buffer Analog nominalMonitor outputI Standing 20 mA". Wave Open ActiveSWR 8 R t. C II t L 30 V max maxI a 10 0 ec or ow., AlarmILow 0 A t.20 mApen c lVeLP A 9 Power C II t L 30 V max maxAlarm 0 ec or owI Page 5I
III OPERATOR ADJUSTMENTSThe operator adjustments are accessible through a slot in the cover of the RF enclosure.IThese are 10-turn potentiometers VR1 through VR5 and switch SW1. Their functions are asfollows:I Ref. Des. Function I AdjustmentI VR1 Determines the threshold for a valid input RF power level.VR2 Low RF power output threshold set to determine the alarm level for the LPAI signal at the Remote Monitor connector.VR3 Sets the Forward Power Monitor (VFM) voltage at the Remote Monitor connector.I VR4 SWR threshold set to determine the alarm level for the SWR signal at theRemote Monitor connector.I VR5 Sets the RF output power level.I SW1 Determines the method of RF output power control. The TEST position providesregulated DC control. The OPER position provides RF feedback leveling control.I A basic understanding of RF principals is necessary before making any adjustments to theIunit. This includes the knowledge of the relationship of forward and reflected power relative toSWR, etc. Adjustment also requires the familiarity and use of test equipment. If in doubt,consult your distributor, dealer or the manufacturer about changes.IIII'I"1Page 6I
II OPERATOR ADJUSTMENTS~ Switch SW2, located inside the RF enclosure, is set according to the particular configuration ofeach amplifier. This switch is factory set at the time of manufacture and should not beI changed. Never turn on more than one switch at any time!I SW2 -1 -2 -3 -414V / REM on off off offI 28V / REM off on off off14V/PSC off off on offr I 28V / PSG off off off onIIThe necessary adjustment procedure to change the RF power level must be done in thesequence shown as follows:,I Provide a proper low-VSWR RF termination for the amplifier.1. Place SW1 into the RUN position.I 2. Apply the minimum RF drive level and adjust VR5 for nominal output power.I 3. With nominal RF output, measure the voltage on pin 7 of the monitor connector (VFM)and adjust VR3 to obtain 5 voltsI 4. Reduce input drive by 3 dB and adjust VR1 so the RFON signal at pin 6 of the monitorconnector goes lowI 5. Restore minimum drive and set the output power down 3 dB from nominal with VR5.Adjust VR2 just until the LPWR signal at pin 9 of the monitor connector goes low.IIncrease the output power to nominal with VR5 while watching for the LPWR signal togo high.I6. With the RF drive off, disconnect the 50 U load and connect a 3:1 VSWR termination.Turn on drive power and set to the nominal level. Adjust VR4 just until the SWR signalat pin 8 of the monitor connector goes low.II Page 7I,--
II WARRANTYr I TPL COMMUNICATIONS has tested and found this unit to function properly and to operatewithin the parameters of its stated specifications.I TPL COMMUNICATIONS warrants that this product is free from defects in material and work-manship. If found to be defective within two (2) years from the date of purchase, the factory atIits discretion, will either repair or replace the unit at no cost provided the unit is delivered bythe owner to the factory intact. Warranty does not apply to any product which has been sub-jected to misuse, neglect, accident, improper installation or used in violation of instructionsIfurnished by us, nor does it extend to units which have been repaired or altered outside ourservice department, nor where the serial number has been removed, defaced or changed.;- SERVICE1 For service on this amplifier, contact:,. TPL COMMUNICATIONS-I Customer Service DepartmentPHONE (323) 256-3000IPHONE: (800) HI POWER -(800) 447-6937, FAX: (323) 254-3210E-Mail: sales@tplcom.comIFor information on other TPL productsvisit our website atwww.tplcom.com"II, " ;. '.,.-' "~ ':; .-'ill;'II,II;"1:1 Page 8I

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