PHLTXUP10001000 Watt Analog TV Broadcast Transmitter

VEGA UHF - TV System Userís manual CODE: APT139NM2 TITLE: VEGA REV: 0 DATE: 15/02/05 SS 96 Km 113 70027 Palo del Colle (Ba) ITALY Tel. +39 (0)80 626755 Fax +39 (0)80 629262 E-mail: [email protected] Web site: http://www.elettronika.it Registration number: IT-17686 Registration number: IT-24436 Index Index ................................................................................................................................... 3 Warning .............................................................................................................................. 5 Warranty ............................................................................................................................. 6 Introduction ....................................................................................................................... 7 Content of the manual....................................................................................................... 7 Treatment of electrical shock ........................................................................................... 9 First-aid ......................................................................................................................... 10 Treatment of electrical burns.......................................................................................... 10 Note ............................................................................................................................... 10 Section 1 - Information .................................................................................................... 13 1.1 Description............................................................................................................... 14 1.2 Main features ...........................................................................................................14 1.3 Technical characteristcs........................................................................................... 15 Front panel .................................................................................................................... 16 Rear panel ..................................................................................................................... 17 Section 2 - Installation..................................................................................................... 19 2.1 Menu management ................................................................................................. 20 2.2 Menu description ..................................................................................................... 22 - Multistandard Audio Mono Section .......................................................................... 22 - Multistandard Audio Stereo Section (Option) ........................................................... 25 - Multistandard Video Section .................................................................................... 29 - Multistandard IF Precorrector Section ...................................................................... 31 - Multistandard Local Oscillator Section with Line Offset ............................................ 32 - Multistandard Local Oscillator Section with Field Offset (Option) ............................. 34 - Multistandard Channel Filter Section ....................................................................... 36 - Controller Module Section ....................................................................................... 39 - RF Amplifier Module Section ................................................................................... 43 - BUS Structure Section ............................................................................................. 45 - External Reference Section ..................................................................................... 46 2.3 Alarms and automation............................................................................................ 48 2.4 External AGC: Implementation and details .............................................................. 50 2.5 Power handling ........................................................................................................ 53 2.6 VEGA Factory setting............................................................................................... 54 - Setup Configuration ................................................................................................... 55 Section 3 - Diagram ......................................................................................................... 57 Cable diagram ...............................................................................................................58 APT139NM2 VEGA - Component list ............................................................................... 59 MTG0071AR1 (Multistandard Audio Mono Modulator Module) .................................... 60 MTG0078AR0 (Multistandard Audio Stereo Modulator Module)................................... 67 MTG0072AR0 (Multistandard Video Modulator Module) .............................................. 76 MTG0073AR0 (Multistandard IF Precorrector Module) ................................................. 86 MTG0084AR0 (Multistandard UHF Local Oscillator Module) ..................................... 102 MTG0075AR0 (Multistandard UHF Channel Filter Module) ....................................... 108 MTG0079AR0 (Controller odule)................................................................................. 112 MTG0076AR0 (External Referement Module) ............................................................ 118 MTF0088BR0 (15W UHF Amplifier Module)............................................................... 122 SCH0194AR1 (BUS Structure).................................................................................... 130 E0017 (SP300-27 Switching power supply) ...................................................…

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57 _______________________________________________________________________________________________ Section 3 - Diagram Contents: - Cable diagram - APT139NM2 VEGA Component list - Modules description 58 59 Part Name CodeDescriptionQty S0007MODULAR STRUCTURE1 MTG0077AR0POWER SUPPLY MODULE1 MTG0076AR0EXTERNAL REFEREMENT MODULE1 MTG0078AR0MULT. AUDIO STEREO MODULATOR - OPT.1 MTG0072AR0MULT. VIDEO MODULATOR MODULE1 MTG0073AR0MULT. IF PRECORRECTOR MODULE1 MTG0084AR0MULT. LOCAL OSCILLATOR MODULE1 MTG0075AR0MULT. CHANNEL FILTER MODULE1 MTG0079AR0DISPLAY AND POWER SUPPLY MODULE1 MTF0088BR015W UHF AMPLIFIER MODULE1 05352SAW FILTER SF0036BA01033T (EX 523) B/G1 OPT016OPTION NOTCH FILTER UHF VEGA1 S0007 VEGA Structure Part Name CodeDescriptionQty 05627BOARD GUIDE cod. 010Z00010 05616FRONT METAL SIDE M 2.5 cod. 000EA0842 05552B3-4U HANDLE KIT cod. 235.0122 DET1010DET1010R1 DOWN DIN GUIDE FOR VEGA1 05611AFRONT METAL SIDE cod. 000DA0842 05611BREAR METAL SIDE cod. 000DA0852 CON0256CON0256R0 LEFT SIDE FOR VEGA1 05609AANGULAR FOR HANDLE cod. 116ZF0012 05617REAR METAL SIDE M 2.5 cod. 000EA0852 SCH0194AR1BUS STRUCTURE1 05636APERFORATED COVER RACK cod. 405MB0842 0269910 WAYS FEMALE CONNECTOR cod. IDS10FSR14 0286720 CONT. FEMALE CONNECTOR cod. IDS20FSR14 028846 WAYS MALE KSC 6 EXTR. CLAMP-HOLDER2 028814 WAYS MALE KSC 4 EXTR. CLAMP-HOLDER2 028972 WAYS MALE 90∞ KSCO2 EXTR. CLAMP-HOLDER 1 VEN00004PAPST FAN mod. 4184NXH 24V1 07596FAN GRID LZ 2011 DET0875IDET0875R1 CONVEYER FAN FOR VEHA INOX P.2678 1 CON0239CON0239R0 RIGHT SIDE FOR VEGA1 08878RG316 50W 41626-SMB 90∞ 260mm DIN CABLE1 08879RG316 50W 41626-SMB 220mm DIN CABLE2 08880RG316 50W 41626-41626 120mm CABLE3 DET1056DET1056R1 UP DIN GUIDE FOR VEGA1 02513SMB 90∞ R114186000 SOCKET1 02515SMB R114313000 SOCKET1 08502RG316 50W CABLE1 Component listAPT139NM2 - VEGA 60 MULT. AUDIO MONO MODULATOR MODULEMTG0071AR1 DESCRIPTION The audio signal enters the module through one 600W balanced or 10kW unbalanced XLR connection, which may be placed either on the front or rear panel and software- selected. It is conditioned by a digital power-meter with a ±8dB 0.5dB-step dynamic and muting. Then there are the emphasis and clipping stages (which can be inserted via software), before the frequency modulation of the audio carrier. The control system of the audio subcarrier is a PLL which locking frequency can be selected via software depending to the transmission standard, while the reference frequency comes from the video module. The control frequency comes from a VCTCXO inside the module to foresee the possibility of a separated-audio system, for which the 20MHz may be locked to a more precise system coming from the 5/10MHz bus. The carrier obtained this way is modulated in frequency and level-conditioned by an IF gain stage trough a digital power-meter with a ±3dB dynamic in fine tuning before being added to the video carrier. The following control signal for the modulator operation are present on the board: PLL lock status of the audio subcarrier, Overload on the audio input, Peak level of the deviation of the audio subcarrier. All of the operating parameters of the board are managed by the built-in micro-processor. Communication to outside are performed trough RS485 bus. TECHNICAL CHARACTERISTICS Input impedance600W - 10kW selectable Nominal level2Vpp -•/+8dB InputFront and back XLR selectable EmphasisFLAT-50msec (FLAT-75usec) Deviation limiterSelectable Low-pass filter15kHz excludible Frequency response< ±0.5dB THD< 0.5% Intermodulation< 60dB (d2,d3) Synchronous AM S/N> 50dB Asynchronous AM S/N> 70dB FM S/N CCIR> 72dB Analog measuresCarrier FM deviation Carrier frequency synthesisPLL Audio carrier characteristicsOn/Off selection and level adjustment > ±3dB Frequency referenceInternal TCXO externally lockable External interfaceMicroprocessor with RS485 protocol FirmwareRe-configurable through RS485 61 62 The module contains the following blocks: 1. Input relay ñ chooses the audio source between the XLR on the front panel of the module and the one on the back of the apparatus and selects the input impedance to 600W or 10kW; both switching are managed by the software. 2. Audio level regulation stage ñ regulates the level of the audio signal by means of a digital potentiometer which can be programmed trough a uWIRE interface (with 0.5dB step between -8dB and +8dB). 3. Emphasis stage ñ inserts an emphasis curve on the audio signal with a time constant depending on the standard (50,75us); the choice can be selected via software. 4. Deviation limiter ñ cuts the audio level to limit the FM deviation; its intervention is handled by the software and the intervention of the clipper, if any, is signalled by a red LED on the front panel. 5. Low-pass filter ñ filters the audio signal before the modulation to suppress external residues from the audio band (20Hz-15kHz); the filter can be inserted by means of jumpers on the board. 6. Audio signal level measurement ñ this stage detects the peak level of the audio signal providing a conditioned analog voltage for the A/D conversion; the voltage will be processed by the microcontroller of the display board (see MTG0079) to be shown as VU-METER. 7. Frequency modulator ñ converts to intermediate frequency the audio signal as FM modulation of a carrier. 8. Carrier level regulation stage ñ switches on and off the audio carrier and the regulation within at least ±3dB of the level referring to the video carrier. 9. IF amplifier ñ amplifies the audio carrier to obtain an output level of -6dBm. 10. Output low-pass filter ñ filters the harmonics of the audio carrier. 11. Audio IF oscillator ñ generates the audio carrier performing the PLL frequency synthesis; the selectable standards and the lock indication are handled by the software. 12. 20MHz reference ñ the frequency reference for the PLL synthesis of the carrier is generated by a TCXO which may be locked to a more precise 5/10MHz external reference (see MTG0076). 13. Controller ñ all of the described…

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102 MULT. UHF LOCAL OSCILLATOR MODULEMTG0084AR0 DESCRIPTION The synthesis system of the local oscillator for the channel conversion is based on a control technique which allows to obtain the programming of the standard, the channel (split into the three bands I, III, IV/V) and the line offset (as multiple of the line frequency of the video signal) via software, with no change to be made. The module includes an internal VCTCXO reference which can be locked to a more precise 5/10MHz reference (trough the bus) needed if the field offset is used. TECHNICAL CHARACTERISTICS Nominal level+13dBm ±1dB FM S/N ccir unweight.> 65dB FM S/N ccir wght.> 60dB Analog measuresVCO control voltage Carrier frequency synthesisA PLL OffsetLine offset, step ±1/12 line frequency O.L. carrier characteristicsOn/Off selection and fine adjust Frequency referenceInternal TCXO externally lockable External interfaceMicroprocessor with RS485 protocol FirmwareRe-configurable via RS485 103 104 The module contains the following blocks: 1. Local oscillator ñ generated the carrier to be synthesised, it is split into three windows (I-II / III / IV-V band) to ensure the coverage of all of the TV channels to be implemented for all standards. 2. Radio-frequency splitter ñ splits the signal coming from the local oscillator by means of splitters and amplifiers, with 10dB attenuation and gain respectively, to ensure the complete isolation of the LO from the other stages and to minimise the ëfrequency pullingí phenomenon. 3. PLL stage ñ synthesises the desired channel by locking the LO to a 20MHz frequency reference by means of a PLL which can be configured via uWire and provides the locking and line-offset indication (LED on frontal panel); the choice is made via software. 4. Active ring filter ñ stabilises the system in PLL retro-action and e has to be modified if the operating band of the module changes (see table attached to the electrical diagram). 5. Conditioning stage of the correction voltage ñ conditions the correction voltage of the PLL ring providing a conditioned analog voltage for the A/D conversion; the voltage is processed by the microcontroller of the display board (see MTG0079) to be displayed as VU-METER. 6. Mixer ñ in the UPCONVERTER version of the module, converts to channel the intermediate frequency coming from the pre-corrector (see MTG0073) using a LEVEL13 mixer (in case the module is only used as LO, see REPEATER configuration, this stage is not present and the synthesised carrier goes directly to the output of the module). 7. 20MHz reference ñ the frequency reference to the PLL synthesis of the carrier is generated by an internal TCXO which fine control of the frequency is internally generated via PWM by the microcontroller or, alternately, can be locked to a more precise 5/10MHz external reference (see MTG0076). 8. Controller ñ all of the described operations are managed by a microcontroller communicating to the user interface board (see MTG0079) by RS485 protocol; the local controller stores the status of the module and a reprogramming of the firmware (possible via RS485 from the display board) does not alter its contents. CALIBRATION PROCEDURE - List of instrument MEASUREINSTRUMENT Lock of the carriers and reference - Spectrum analyser - Oscilloscope - Tester 105 The calibration procedure of the module requires a complete structure of display board (see MTG0079) and extension module (see MTG0095) in order to perform the software selection which will be referred to later and power the module itself.. - Menu of the Multistandard UHF Local Oscillator Module Verification of the local oscillator section ñ connect a spectrum analyser to the monitor of the J4 module and check the sections therein: qConfigure the module with Output Enabled, LineOffset Zero, Ref Internal and Channel on the desired channel, and calibrate C1(C2 and C3) to lock the carrier to the LO frequency of the standard and channel set (to change the standard refer to the standard changing procedure) and obtain a locking voltage between 2V and 3V on TP1, checking that VCO is on Lock in the display menu. Verification of the external reference section ñ connect a spectrum analyser to the monitor of the J4 module and check the sections therein: qConfigure the module with Ref Internal and check that it is possible to find adjust the synthesised frequency by acting on Tune. - Description of the adjustment points COMPONENTDESCRIPTION C1, C2, C3 Tuning of the local oscillator (SCH0292 - 0309 - 0310) J3 LO input J5, J8 RF link (absent in case of LO configuration) J4 LO monitor (panel) JP1 Unused J2 Testpoint for the debug of the PLL 106 Component layout for adjustment points 107 Component layout SCH0293AR0 Component layout SCH0292AR0 108 MULT. UHF CHANNEL FILTER MODULEMTG0075AR0 DESCRIPTION The module filters the signal coming from the conversion mixer removing the local oscillator and the upper side-band and contains the voltage-controlled gain stage composed by a pin-diode attenuation cell followed by a wide-band amplification stage used as driver of the final stage. TECHNICAL CHARACTERISTICS Input/output impedance 50W R.O.S.>20dB Filter type Active 5-cell band-pass RF-attenuation type 4 PIN-diodes cell Output amplifier Wide band Overall gain 25dB (max.) The module contains the following blocks: 1. Active band-pass filter ñ filters the lower side-band after conversion, it is split into three windows (I-II / III / IV-V band) to ensure the coverage of all of the TV channels to be implemented for all standards, and contains the PIN-diode attenuation cell for the gain control. 2. Wide-band amplifier ñ amplifies the filtered channel in order to obtain the correct driving level for the RF final stages (see MTF0088-0087-0089). CALIBRATION PROCEDURE - List of instruments MEASUREINSTRUMENT Calibration of the channel filter - Network analyser - Spectrum analyser with tracking 109 The calibration procedure of the module requires a complete structure of display …

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AUTV/1000LD LDMOS - UHF TV Solid State Amplifier Userís manual CODE: APT148B TITLE: AUTV/1000LD REV: 0 DATE: 11/03/05 SS 96 Km 113 70027 Palo del Colle (Ba) ITALY Tel. +39 (0)80 626755 Fax +39 (0)80 629262 E-mail: [email protected] Web site: http://www.elettronika.it Registration number: IT-17686 Registration number: IT-24436 3 WARNING The apparatus described in this manual has been designed and manufactured with devices to safe- guard the users. In any case it is recommended that during any operation of installation, maintenance, miscellaneous interventions and calibrations requiring the apparatus to be switched on, THE USER TAKES ALL THE PRECAUTIONS AGAINST INCIDENTS It is required to use the proper clothes and protection gloves in order to prevent damages from inci- dental contacts with high-voltage parts. The manufacturer declines every responsibility in case the recommendations above are not followed. IMPORTANT The component lists attached to the relevant electrical diagrams indicate for each item the reference, the description and the type normally used. The Elettronika S.r.l. though reserves the right to use or supply as spare parts components with equivalent characteristics but of a different type, assuring anyway the optimal work of the apparatus in accordance with the specifications. The enclosed monographs are solely owned by Elettronika S.r.l. The use of anything enclosed in this technical manual without explicit authorization given by Elettronika S.r.l. will be prosecuted by the law. The data and technical characteristics of the apparatus described in this manual are not compelling for the manufacturer. The Elettronika S.r.l. reserves the right to make, without previous notice, modifications or updates in order to improve the quality of the product. The general conditions of supply and sale are described in the contracts. The delivery time are in accordance with the products and quantities ordered. 4 Summary of warranty We, ELETTRONIKA S.r.l., SS096 Km 113 Z.I. PALO DEL COLLE (BA) ITALY, warrant to the ORIGINAL PURCHASER of a NEW product, for a period of one (1) year from the date of purchase by the original purchaser (the ìwarranty periodî) that the new ELETTRONIKA product is free of defects in materials and workmanship and will meet or exceed all advertised specifications for such a product. This warranty does not extend to any subsequent purchaser or user, and automatically terminates upon sale or other disposition of our product. Items excluded from this ELETTRONIKA warranty We are not responsible for product failure caused by misuse, accident, or neglect. This warranty does not extend to any product on which the serial number has been defaced, altered, or removed. It does not cover damage to loads or any other products or accessories resulting from ELETTRONIKA product failure. It does not cover defects or damage caused by use of unauthorized modificstions, accessories, parts, or service. What we will do We will remedy any defect, in material or workmanship (except as excluded), in our sole discretion, by repair, replacement, or refund. If a refund is elected, then you must make the defective or malfunctioning component available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers or at our factory. Expenses in remedying the defect will be borne by ELETTRONIKA, including one-way surface freight shipping costs within the United States. (Purchaser must bear the expense of shipping the product between any foreign country and the port of entry in the United States and all taxes, duties, and other customís fee(s) for such foreign shipments). How to obtain warranty service You must notify us of your need for warranty service not later than ninety (90) days after the expiration of the warranty period. We will give you an authorization to return the product for service. All components must be shipped in a factory pack or equivalent which, if needed, may Desclaimer of consequential and incidental damages You are not entitled to recover from us any consequential or incidental damages resulting from any defect in our product. This includes any damage to another product or products resulting from such a defect. Warranty alterations No person has the authority to enlarge, or modify this warranty. The warranty is not extended by the lenght of time for which you are deprived of the use of the product. Repairs and replacement parts are provided under the terms of this warranty shall carry only the unexpired portion of this warranty. Design changes We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured. Legal remedies of purchaser There is no warranty which extends beyond the terms hereof. This written warranty is given in lieu of any oral or implied warranties not contained herein. We disclaim all implied warranties, including without limitation any warranties of merchantability or fitness for a particular purpose. No action to enforce this warranty shall be commenced later than ninety (90) days after expiration of the warranty period. Warranty for electronic tubes The warranty applied for electronic tubes is the one given by the manufacturer of the tube. In the event that the product shows anomalies within the deadline of the validity of the warranty given by the manufacturer of the product itself, the buyer will have to return it to the seller with the needed documents and the written description of the defect. The seller will ship the broken tube to the manufacturer in order to effect the necessary technical tests to find out the cause of the anomaly. Meanwhile the buyer…

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31 _______________________________________________________________________________________________ Section 4 - Diagram Contents: - Cable diagram - MTF0077AR0 Amplifier module - Component list - SCH0192AR0 (200W UHF LDMOS Amplifier module) - SCH0223AR1 (Control board and display) - SCH0259AR0 (RF Amplifier interface) - SCH0265AR0 (Mains distribution board) - SCH0288AR1 (Interface board) - E0012 (SP500-27-DE2 Switching power supply) 32 33 Part Name CodeDescriptionQtyPage 1/2 00441TERMINAZIONE 50W 500W 32-1123-50-51 01400C. PAS. 2499-003-X5U0-102M11 024027/16 FEMMINA ANIM. FILET. cod. 01421 SCH0192AR0SCHEDA AMPLIFIC. 200W UHF LDMOS PHILIPS7 00424TERMINAZIONE 50W 250W 32-1037-50-56 03207DIODO HSMS-2802*L313 00028A82W RESISTENZA SMD 1/4W3 01041D1nF COND, SMD 1206 2%3 08527CAVO HF-85 ENDIFORM0,40 08502CAVO RG316 50W1,70 CAV092CAVO RG179 75W DA 10cm8 DET0732DET0732R1 PIASTRINA SUPPORTO CONNESSIONI 1 DET0959DET0959R0 SPESSORE x PN1120A1 02520GE 65125 D/22 SMA A VIT. RG174/c1 02512J01151A0531 PRESA SMA SEN. BAT1 DET0868DET0868R0 SPESS. ACC. DIR. ING. 1000W UHF1 PN1083AC.S. PN1083AR2 ACCOPPIATORE INGRES. 1500W 1 PN1091AC.S. PN1091AR3 ACCOP. DIREZ. OUT 1500W UHF 1 DET0839DET0839R2 ACCOPPIATORE DIREZIONALE1 DET0810DET0810R0 PART. x ACCOPPIATORE DIREZIONALE 1 00029D100W RESISTENZA SMD 1206 1%1 00221B75W RESISTENZA SMD 1206 1%2 01408C. PAS. 5000PF2 DET0811DET0811R1 CHIUS. x ACCOP. DIREZIONALE1 DET0812DET0812R1 ANELLO IN TEFLON x ACCOP. DIR.1 000010W REISTENZA SMD 12062 PN1077AC.S. PN1077AR2 COMBINATORE 6VIE 1kW UHF1 PN1120AC.S. PN1120AR1 COMBINATORE 2VIE 1kW UHF1 PN1118AC.S. PN1118AR1 DIVISORE 2VIE 1kW UHF1 PN1066AC.S. PN1066AR3 DIVIS. 3VIE UHF 1kW DESTRO1 PN1080AC.S. PN1080AR2 DIVIS. 3VIE 1kW UHF SINIST.1 DET0960DET0960R0 SPESSORE x PN1077A1 DET0961DET0961R0 CHIUSURA MODULO RF 1kW UHF1 00383RESISTENZA SMD 1W 2512 100R 224/027212 00395560W RESISTENZA SMD 1W 224-03732 00399220W RESISTENZA SMD 1W 224-03172 00403270W RESISTENZA SMD 1W 2512 1%12 DET0901DET0901R0 DISSIPATORE 1kW UHF 6 MOD.1 DET0902DET0902R0 SPONDINA ANT. 1kW UHF 6 MOD.1 DET0903DET0903R0 SPONDINA POST. 1kW UHF 6 MOD.1 DET0803DET0803R1 SPOND. LATERALE 1kW IIIBd1 DET0905DET0905R0 SPONDINA CENTR. 1kW UHF 6 MOD. 1 DET0906DET0906R0 SPONDINA LATER. SX 1kW UHF 6 MOD. 1 DET0907DET0907R0 SPONDINA PILOTA 1kW UHF 6 MOD. 1 DET0908DET0908R0 SPOND. WILKINSON 1kW UHF 6 MOD. 2 Component listMTF0077AR0 Amplifier module 34 Part Name CodeDescriptionQtyPage 2/2 08503ACABLE RG302 75W0,20 08521CAVO RG179 BU 75W0,54 DET0904DET0904R0 SPONDINA LAT. DX 1kW UHF 6 MOD. 1 35 Part Name CodeDescriptionQty APT148AAMPLIFICATORE UHF 1000W LDMOS MEANWELL 1 06659BANDPASS FILTER CL3N60C-AEE IV/VBd1 RO156FRACK 20U 565x1000 CON COPER. FORATO1 Z0500TAV. 1081RF GUIDA RACK 3000W P. 2328 ZN4 DET0462DET0462R0 BARRA x RACK SOSTEGNO PCAV ZN 4 PAN0082PAN0082R0 PANN. FRONT. 3U CON POLICARB.2 PAN0080PAN0080R0 PANN. FRONT. 1U CON POLICARB.1 PAN0081PAN0081R0 PANN. FRONT. 2U CON POLICARB.2 CSS5011CAVO IN RG58 DA 1.5MT NM/NM1 CON0093CON0093R3 POSTERIORE RACK 20U VR P. 25441 CMS6006CAVO 1/2î DA 1MT CONN. 7/16(M) BN2033911 02502J01150A0041 SMA x RG58/c1 08504CABLE RG58 50W1 02009GE35145 D/60 BN (UG909/cxRG58)1 07595VENTOLE G2E160.AD01.211 07595ACOND. 6uF VENTOLA G2E160.AD01.211 Z0114REGGI TUBO ARIA x 1kW P. 2058 TAV. 358/A ZN1 DET0434DET0434R2 ANCORAGGIO FLANG. 7/8 CON RACK 1 DET0564DET0564R0 COLLARE FISS. EIA 7/81 DET0565DET0565R0 ANCORAGGIO COLL. EIA 7/81 02450CONNECTOR EIA 7/8î FOR 1/2î cod. 97131 02458INNER EIA 7/8î cod. 01351 08515ACABLE 1/2î LDF4-50A 50W1 02410CONNECTOR 7/16 x 1/8î SP 10 CLX 1601 07959BGRIGLIA x VENTOLA G2E160.AD01.211 07596GRIGLIE VENTOLE LZ 2011 DET0609DET0609R0 BARRETTA REGGI FILTRO2 R0031CERNIERA PER SCURETTO LACCATA2 D0101CHIAVE QUADRA MM8 E3-8-11 D0100CHIUSURA A COMPRESSIONE SE3-1010-0452 DET0671DET0671R0 SPES. x CERNIERA REG. PORTIERA2 Component listAPT148B - AUTV/1000LD 36 This page is intentionally blank 37 200W UHF LDMOS AMPLIFIER MODULESCH0192AR0 DESCRIPTION The RF module is an integrated TV linear amplifier designed for UHF band, this module employs push-pull LDMOS technology in order to achieve very good efficiency, high linearity and reliability. LDMOS transistors operate in AB class. It is a wideband amplifier over the full frequency, no adjustment is required for the channel change. The board includes RF section amplifier, bias circuit, protection circuit and matching networks. A silver plated copper plate is brazed with PCB in order to obtain low thermal resistance. Providing a minimum of 200W Pk sync linear power, this module is the perfect amplifier for any broadband UHF power transmitter. TECHNICAL CHARACTERISTICS Output power300W max Input power15W max Frequency470 - 860MHz Gain> 13dB LDMOS Power supply32V ±2% LDMOS Bias current @+32V Vdc 2A RF Input impedance50W RF Output impedance50W Input / Output return loss> = 15dB Drain efficiency47% @ 250W Storage temperature range-50∞ to +150∞C Dimensions (LxWxH)165x95x29mm 38 CALIBRATION PROCEDURE - Technical characteristics Power supply voltage32V (± 2%) Polarisation current1.0 cold for each device (2A total), ± 0.1A Gain for low signalNot less than 13dB in the 470-860MHz band (± 1dB) Compare to the typical curve eclosed - Adjustment procedure Polarisation current calibration32V stabilised power supply 10A amperometer Gain curveNetwork analyser - Adjustment points description R7-R8 (Trimmers)Adjust the current absorbed in stand-by (1.0A per device) Middle frequency 660MHz, span 500MHz, 2dB/div., reference to the arrow - Curve response graphic 39 - Calibration steps STEP 1.Close the input and the output of the module by connecting them to a 50 WW WW W dummy load and connect the spectrum analyser through a directive sample, in order to look for self-oscillation of the module, if any (anyway the module has been designed so that it would not self-oscillate even if totally de- coupled, without any input or output load). STEP 2.Check the voltages of the polarisation circuits without assembling the transistors firs…

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