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Elettronika AUTV/250LD User Manual

Ldmos - uhf tv amplifier
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AUTV/250LD
LDMOS - UHF TV Solid State Amplifier
CODE
APT134A TITLE
AUTV/250LD REV
0 DATE
06/11/03

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Summary of Contents for Elettronika AUTV/250LD

  • Page 1 AUTV/250LD LDMOS - UHF TV Solid State Amplifier CODE APT134A TITLE AUTV/250LD REV 0 DATE 06/11/03...
  • Page 2 SS 96 Km 113 Registration number: IT-17686 70027 Palo del Colle (Ba) ITALY Tel. +39 (0)80 626755 Fax +39 (0)80 629262 Registration number: IT-24436 E-mail: elettronika@elettronika.it Web site: http://www.elettronika.it...
  • Page 3 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.

  • Page 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 “warranty period”) 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.
  • Page 5 CONTENTS OF THE MANUAL The chapter composing this manual contain all the information concerning the use of the apparatus. For more information refer to ELETTRONIKA S.r.l. This manual is made up of different chapters, each made up of various sections.
  • Page 6 Elettronika S.r.l. shall not be responsible for injury or damage resulting from improper procedures or from the use of improperly trained or inexperienced personnel performing such tasks.
  • Page 7 Treatment of electrical shock 1) If victim is not responsive follow the A, B, C’s of basic life support. PLACE VICTIM FLAT ON HIS BACK ON A HARD SURFACE A - AIRWAY B - BREATHING If unconscious, open airway lift up neck, push If not breathing, begin artificial breathing.
  • Page 8 2) If victim is responsive: - keep them warm; - keep them as quiet as possible; - loosen their clothing (a reclining position is recommended). FIRST-AID Personnel engaged in the installation, operation, maintenance or servicing of this equipment are urged to become familiar with first-aid theory and practices.
  • Page 9 Further to the directives issued by the European Community, 2002/95/CE, 2002/95/CE and 2003/108/ CE, and to the Italian Decree of Law n° 151 dated 25 July 2005, this is to inform the customers of Elettronika S.r.l. living within the boundaries of the European Community about the following obligations: 1) It is forbidden to trash RAEE products (which includes all broadcasting products which are not expressly labelled as lead-free) along with normal wastes;...
  • Page 10 This page is intentionally blank...
  • Page 11 LDMOS - UHF TV AMPLIFIER AUTV/250LD User’s manual...
  • Page 12 This page is intentionally blank...
  • Page 13 Section 1 - Information Contents: 1.1 Description 1.2 Technical characteristics...
  • Page 14 LDMOS - UHF TV AMPLIFIER 1.1 DESCRIPTION The amplifier AUTV/250LD is an apparatus designed to be used as final power stage or driver for higher- power amplifiers in the UHF TV band. It is able to supply a power of 250W (peak sync.) in class AB and is completely realized with LDMOS technology.
  • Page 15 1.2 TECHNICAL CHARACTERISTICS RF SECTION Frequency range 470 - 860MHz Output power 250W Gain 13dB +/-1 RF Input impedance 50Ω RF Output impedance 50Ω I.M.D. (3 Tones: -8, -10, -16dB) < -54dB (with IF Pre-corrector) RF Spurious products Better than -60dB Filter insertion loss <...
  • Page 16 This page is intentionally blank...

  • Page 17: Table Of Contents

    Section 2 - Installation Contents: 2.1 Operating environment 2.2 Preliminary operations 2.3 Telemeasuring socket connections 2.4 RS232 / RS485 Socket connections 2.5 Control system 2.6 Preventive maintenance - Front panel - Rear panel...

  • Page 18: Operating Environment

    2.1 OPERATING ENVIRONMENT You can install the apparatus in a standard component rack or on a suitable surface such as a bench or desk. In any case, the area should be as clean and well-ventilated as possible. Always allow for at least 2 cm of clearance under the unit for ventilation.

  • Page 19: Telemeasuring Socket Connections

    Before powering fully the apparatus, check that the output connections of the coaxial cable to the antenna system are working. In order to this it is possible to check the indication of the reflected power at low power levels. Only if the SWR indication on the display is 0, the output power can be slowly increased.

  • Page 20: Control System

    2.5 CONTROL SYSTEM The control system allows the user to monitor the most important measures of the transmitter, voltage and current of the power supply, temperature of the RF board, forward and reflected power, by using the two keys placed on the frontal panel. The turn-on key allows to turn on and off the transmitter. In case one of the monitored measures is in alarm, the transmitter will show this.

  • Page 21: Front Panel

    Front panel DESCRIPTION LCD Display RF Monitor connector Function keys Status LEDs Main switch...

  • Page 22: Rear Panel

    Rear panel DESCRIPTION Power supply socket Auxiliary socket Breaker RS232 Socket Telemeasuring socket RF Output connector RF Input connector...
  • Page 23 _______________________________________________________________________________________________ Section 3 - Diagram Contents: - Cable diagram - AUTV/250LD Component layout - RF Section Block Diagram - SCH0192AR0 (250W UHF LDMOS Amplifier module) - SCH0122BR1 (Control board and display) - SCH0128AR1 (Amplifier interface) - E0012 (SP500/27-48 Switching power supply)
  • Page 27 200W UHF LDMOS AMPLIFIER MODULE SCH0192AR0 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.

  • Page 28: Calibration Procedure

    - Curve response graphic Middle frequency 660MHz, span 500MHz, 2dB/div., reference to the arrow CALIBRATION PROCEDURE - Technical characteristics Power supply voltage 32V (± 2%) Polarisation current 1.0 cold for each device (2A total), ± 0.1A Gain for low signal Not less than 13dB in the 470-860MHz band (±...
  • Page 29 - Calibration steps Close the input and the output of the module by connecting them to a 50Ω Ω Ω Ω Ω dummy load STEP 1. 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).
  • Page 30 capacitive trimmers, between the two pair of gates, as shown by the mounting plan. STEP 5. Connect serially a c.c. amperometer to the power supply, with scale starting from more than 5A (i.e. 10A). STEP 6. Power the module and check the MOSFET is not absorbing current; this means that the device is integral and working correctly.
  • Page 31 Component layout SCH0192AR0...
  • Page 33 COMPONENT LIST SCH0192AR0 REF. DESCRIPTION ELETTRONIKA CODE Page 1/3 2200Ω 1/4W 1206 SMD RESISTOR 00045A 2200Ω 1/4W 1206 SMD RESISTOR 00045A 2200Ω 1/4W 1206 SMD RESISTOR 00045A 2200Ω 1/4W 1206 SMD RESISTOR 00045A 1200Ω 1/4W 1206 SMD RESISTOR 00042A 1200Ω 1/4W 1206 SMD RESISTOR 00042A 50kΩ...
  • Page 34 REF. DESCRIPTION ELETTRONIKA CODE Page 2/3 100nF 1210 SMD CAPACITOR 1065G 10uF 16V SMD TANTALIUM CAPACITOR 01626A 10uF 16V SMD TANTALIUM CAPACITOR 01626A 100nF 1210 SMD CAPACITOR 1065G 100nF 1210 SMD CAPACITOR 1065G 100nF 1210 SMD CAPACITOR 1065G 100nF 1210 SMD CAPACITOR...
  • Page 35 REF. DESCRIPTION ELETTRONIKA CODE Page 3/3 COAX 2:1 BALUN 08491 COAX 4:1 BALUN 08492 COAX 4:1 BALUN 08492 4 TURNS SILV. COP. WIRE 1.2mm WOUND ON OD 5mm 07684 4 TURNS SILV. COP. WIRE 1.2mm WOUND ON OD 5mm 07684 ½...
  • Page 36 Temperature, Idc, FWD, REF). If the amplifier is switched off, the “STAND BY” indication is shown on the display and the backlight is turned off. The amplifier can be remotely controlled by serial line (contact ELETTRONIKA for details). It is configurable as RS232 or RS485.
  • Page 37 Note: When changing the voltage of the device from 230 to 110VAC, it also takes acting on the SW3 switch on the display board. Failure to do this may result in damages to the device.
  • Page 40 COMPONENT LIST SCH0122BR1 Part Name/Number Description Qty. Comps. Page 1/2 CC 100nF-S 01065C 01065C Y5V 1206 COND C1-2, C8, C11, C14, C21, C22, C24-32, C34, C40, C42, C44, C47, C49-50 CC 15pF-S 01088 01088 SMD 1206 COND C12-13 CC 1nF-S 01096 01096 SMD 1206 COND C15, C17-18, C20, C33 CC 1uF100V-S 01760A...
  • Page 41 Part Name/Number Description Qty. Comps. Page 2/2 R 1K0-1%-S 00041B 00041B RES 1/4W 1% SMD 1206 R5-6, R10, R14, R24, R38, R 1K2-1%-S 00042A 00042A RES 1/4W 1% SMD 1206 R40-42 R 22K-1%-S 00057B 00057B RES 1/4W 1% SMD 1206 R9, R13 R 2R2-S 00009A RES 1/4W 5% SMD 1206...
  • Page 42 AMPLIFIER INTERFACE SCH0128AR1 DESCRIPTION The interface board (SCH0128AR1) is used to connect the amplifier stages to the control board (SCH0122BR0) to allow to the microcontroller the reading of the RF and analogical parameters. It is simply composed of one temperature sensor, a voltage regulator, some passive componentes and a 10 pin connector J2.
  • Page 44 COMPONENT LIST SCH0128AR1 Part Name/Number Description Qty. Comps. CC 100nFAVX 01065A 01065A CERAMIC COND C1-4 D 1N4007 03009 03009 DIODE D1-2 IC LM317HV 04340A INTEG CIRCUIT IC LM35DT 00664 00664 INTEG CIRCUIT J FC-16P 02701-02700 02701+02700 PCB CONNECTOR POL J SCREWCONN2 02853 02853 PCB SCREW CONNECTOR JU JUMP2 02739-02742 02739+02742 MASCHIO PAN2...

  • Page 45: Main Features

    SP500-48 SWITCHING POWER SUPPLY E0013 MAIN FEATURES - Universal AC input / Full range - Built-in active PFC function, PF>0.95 - Protections: Short circuit / Over load / Over voltage / Over temp. - Forced air cooling by built-in DC fan - Built-in cooling Fan ON-OFF control - Built-in remote sense function - Fixed switching frequency at 110kHz...
  • Page 46 TECHNICAL CHARACTERISTICS MODEL SP500-27 SP500-48 DC VOLTAGE RATED CURRENT CURRENT RANGE 0 ~ 18A 0 ~ 10A RATED POWER 486W 480W RIPPLE & NOISE 200mVp-p 300mVp-p (max.) Note 2 OUTPUT VOLTAGE ADJ. RANGE 24 ~ 30V 41 ~ 56V VOLTAGE TOLERANCE ±...
  • Page 47 DERATING CURVE 50 (HORIZONTAL) AMBIENT TEMPERATURE ( ) OUTPUT DERATING VS INPUT VOLTAGE INPUT VOLTAGE (V) 60Hz...
  • Page 48 UHF TV OUTPUT FILTER IMD SUPPRESSOR 06604A 3 SECTION BANDPASS FILTER WITH 2 NOTCH ELEMENTS - COMB-LINE STRUCTURE, INDUCTIVE COUPLING IRISES; CONSTANT BANDWIDTH, VERY EASY TO TUNE - EXACT GENERALIZED CHEBISHEV DESIGN GIVING MAXIMUM SELECTIVITY AND MINIMUM GROUP DELAY VARIATION. SPECIFICATIONS Frequency 470 - 860MHz...

  • Page 49: Technical Description

    TECHNICAL DESCRIPTION The output UHF filter is made up of a resonators bandpass filter and two notches. It can be regulated on all the channels of UHF TV band (470 - 8690MHz) and according to all world-wide standards (intercarrier 4.5 - 6.5MHz).
  • Page 50 notches if it has to be moved and then the bandpass tunings. Execute the sequence in small steps aiming to improve the matching. SPECIFICATION OVER THE UHF BAND MEASURE VALUE Insertion loss @ V.C. < 0.65dB (Typ. 0.56) Return Loss (from V.C.-0.75 to S.C.+0.25) >...

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