Electronika LDMOS UHF SERIES User Manual

Medium power tv amplifier

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LDMOS UHF SERIES

MEDIUM POWER TV AMPLIFIER

User's manual

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Summary of Contents for Electronika LDMOS UHF SERIES

Page 1 LDMOS UHF SERIES MEDIUM POWER TV AMPLIFIER User’s manual...
Page 2 This page is intentionally blank...
Page 3: Table Of Contents
Section 1 - Information Contents: 1.1 Description 1.2 Main Features 1.3 Technical characteristics 1.4 Front panel 1.5 Rear panel Rear connections...
Page 4: Description
MEDIUM POWER TV AMPLIFIER SERIES 1.1 DESCRIPTION The amplifier belongs to the Medium Power Amplifier products family of Television Amplifiers fully in solid state LDMOS technology. These TV Amplifiers operate in the UHF Band with Common amplification process (separate amplification available) of the Video and Audio carriers.
Page 5: Technical Characteristics
1.3 TECHNICAL CHARACTERISTICS RF SECTION - Analog Operation Frequency Range ................................UHF Output Power (±0.5dB) ............................... 1300W Amplification Class ................................AB Gain (±2dB) ..................................28dB Technology ............................. Solid State LDMOS RF Input Connector ..............................N Female Impedance ..................................50Ω RF Output Connector (Amplifier / Rack) ................... 7/16” Female / EIA 7/8” Impedance ..................................
Page 6 PROTECTIONS Output Forward Power Output Reflected Power Unbalance Power RF Modules Current Power Supply Voltage PROTECTIONS Forward Power (Analogue) ............................1500W Reflected Power (Analogue) ............................150W Forward Power (DVB-T) ..............................400W Reflected Power (DVB-T) ............................... 40W Forward Power (ATSC) ..............................600W Reflected Power (ATSC) ..............................
Page 7: Front Panel
1.4 FRONT PANEL 1. Function keys 2. LCD Graphic Display RS232 for connection 3. Status LEDs to PC with ERCoS software 4. RS232 Socket and for firmware upgrade 5. RF Monitor Connector Pin 2: 6. Main Switch Pin 3: Pin 5:...
Page 8: Rear Panel
1.6 REAR PANEL FUSE FUSE FUSE 1. Breaker 2. AC 220V OUT Socket Wired Telemeasures connector EXCITER for connection 3. AC 400V IN Socket to Driver Module . FAN 3.15A Fuse Pin 1: FWD power (Analog out) Pin 2: REF power (Analog out) Pin 1: .
Page 9 Section 2 - Installation Contents: 2.1 Operating environment 2.2 First installation 2.3 Connection with VEGA Transmitter 2.4 Stand-alone Amplifier configuration in Dual Drive version 2.5 Slave multi-Amplifier configuration with Amplifier Control 2.6 Stand-alone Amplifier configuration with Elettronika RCU 2.7 Stand-alone Amplifier configuration with direct PC connection...
Page 10: Operating Environment
2.1 OPERATING ENVIRONMENT You can install the equipment 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. Do not locate the equipment directly above a hot piece of device.
Page 11: Connection With Vega Transmitter
When the equipment is put within a combined system it is directly connected to the input splitting and output combining systems. Before fully powering the equipment, 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.
Page 12: Stand-Alone Amplifier Configuration In Dual Drive Version
2.4 STAND-ALONE AMPLIFIER CONFIGURATION IN DUAL DRIVE VERSION 19kHz VIDEO LEFT RIGHT DIRECT REMOTE MAIN CTRL RF AUX IN RF OUT RF MAIN IN MAIN MAIN LEFT RIGHT AUX CTRL MAIN MAIN MAIN REMOTE RS232/485 LEFT RIGHT AC 400V IN RF IN RS485 TELEMEASURES...
Page 13: Slave Multi-Amplifier Configuration With Amplifier Control
2.5 SLAVE MULTI-AMPLIFIER CONFIGURATION WITH AMPLIFIER CONTROL From SPLITTER AMPLIFIER CONTROL AMPLIFIER AC 400V IN RF IN RS485 TELEMEASURES BREAKER AC 200V OUT To COMBINER RF OUT...
Page 14: Stand-Alone Amplifier Configuration With Elettronika Rcu
2.6 STAND-ALONE AMPLIFIER CONFIGURATION WITH ELETTRONIKA RCU AC 400V IN RF IN RS485 TELEMEASURES BREAKER AC 200V OUT RF OUT 2.7 STAND-ALONE AMPLIFIER CONFIGURATION WITH DIRECT PC CONNECTION SERIAL PORT...
Page 15 Section 3 - Operation Contents: 3.1 Operation 3.2 Display 3.3 Menus 3.4 Firmware upgrade...
Page 16: Operation
3.1 OPERATION At startup, after initial image, the display shows the main screen with the RF powers as below: The user may turn on and off the amplifier by means of the switch on the front panel. The control board turns on all the power supplies, the exciter (if any), and internal cooling fans.
Page 17: Menu
3.2 DISPLAY The Control Board is provided with a modern pixels graphic display with blue background. Normally it always shows a title bar (on the top line) and a status bar (on the bottom line). The ‘Title bar’, shows the name of the amplifier (TV Amplifier) and the current time.
Page 18 The display only shows three items at a time: all the items can be scrolled by the UP and DOWN arrow keys. Any item can be chosen by selecting it and pressing the RET key. Menu entries with an arrow on the right open sub-menus when chosen.
Page 19 Log/Alarms The control board is provided with an external EEPROM and a clock. Any alarm or switching event with the time at which it occurred is saved in the EEPROM. The Log/ Alarms sub-menu allows to manage this log. It is possible to see the events stored in the log by selecting Log/Alarms View Log/ Alarms.
Page 20 working (i. e. there is at least one power supply working). The menu entry Working Timer View Timer allows to check the hours for which the timer has been enabled. Working Timer Timer Reset resets the timer. Thresholds This is a screen showing the alarm threshold of each signals monitored by the control board.
Page 21 alone mode or set a slave address by means of the UP and DOWN arrow keys. The changes made are saved by pressing the RET key or discarded pressing the ESC key. Remote The amplifier may be controlled either locally, by means of the keys and display, or remotely.
Page 22: Firmware Upgrade
3.4 FIRMWARE UPGRADE The microcontroller is provided with a built-in Flash memory containing the firmware. The firmware can be updated with a later version without removing the apparatus from the rack and/or replacing the chip. To upgrade it, connect a PC to the RS232 socket on the front panel of the apparatus by means of a cable DB9 male - DB9 female (pin-to-pin).
Page 23 Section 4 - Diagram Contents: - APT144 AUTV/1500LD Cable diagrams - APT144C_APT144CM AUTV/1500LD Component list - APT144DM_APT144DM/DIG AUTV/1500LD Component list - Modules description...
Page 24 TEMP...
Page 25 TEMP...
Page 26 Component list APT144C_APT144CM Elettronika Code Description Page 1/2 00664 LM35DT THERMAL SENSOR 01041 1nF 50V CERAMIC CAPACITOR 02228 N FEMALE CONNECTOR (APT144CM) 02502 SMA SOCKET FOR RG58 02695 DB9 CONNECTOR FOR IU008059 CABLE 02699 FEMALE 10WIRE CONNECTOR 02700 FEMALE 16WIRE CONNECTOR 02830 10A GREEN PLUG 02876...
Page 27 Elettronika Code Description Page 2/2 SCH0223AR1 CONTROL BOARD AND DISPLAY SCH0265AR0 MAINS DISTRIBUTION BOARD SCH0288AR1 POWER SUPPLY INTERFACE BOARD V0760 BLACK PLASTIC TAP (APT144CM) V0962 TERMINAL BLOCK (APT144CM) Z0021 MECHANICAL DETAIL Z0081 MECHANICAL DETAIL Z0673 COVER...
Page 28 Component list APT144DM_APT144DM/DIG Elettronika Code Description 02029 UG909 CONNECTOR FOR RG 58 CABLE 02410 7/16” CONNECTOR FOR 1/2” CABLE 02450 EIA 7/8” CONNECTOR FOR 1/2” CABLE 02458 EIA 7/8” INNER 02502 SMA SOCKET FOR RG58 CABLE 02791 DB9 MALE SOCKET PANEL MOUNTING (APT144DM) 2 (APT144DM/DIG) 02871 DB9 SHELL...
Page 29 CONTROL BOARD SCH0223AR1 DESCRIPTION The Control Board SCH0223A manages the operational logic of the amplifier: switching on and off, power supply and fans, alarms and protections, remote control, human-machine interface. All of that is performed by a modern and powerful 16 bit micro-controller, which is the main part of the board. Figure 1: Simplified block diagram of the control and display board...
Page 30 It can be seen that the micro-controller is the heart of the control system, to which the various peripherals (power supply, serial ports, telemeasure socket, AGC port, RF amplifier module, ROM, clock, display and keys) are interfaced. - Power Supply The board is powered with a continuous +24V voltage applied on the J14 connector.
Page 31 micro-controller acquires the forward and reflected powers, unbalancing (if any), and temperature of the critic amplification area. It also allows to inhibit the transistors in case of reflected power alarm, by means of a totally hardware, thus extremely fast protection. Depending on the apparatus, this connector may also allow to enable or disable the cooling fans of the critic area.
Page 32 TELEMEASURES The J9 telemeasure connector (10 pins socket) is directly wired on a DB9 female connector placed on the rear panel. There are input and output digital lines (TTL level) and analog output lines on this connector, which are used to monitor and control the amplifier by means of a general-purpose remote control system. The correspondence between the pins of the J9 connector on the board and the DB9 female connector on the rear panel, as well as the meaning of the various lines, is shown in table 3 below (the directions are in respect to the micro-controller on the board).
Page 33 level of the interlock signal becomes high (this line has a pull-up towards the +5V power supply voltage as well) and the interlock protection activates switching off the amplifier. Note that in case the interlock protection is not used, the pin 4 of the DB9 telemeasure connector and the earth pin (pin 5) must be short circuited. Otherwise it is possible to disable the monitoring of the interlock chain from menu (see user manual).
Page 34 PIN N° PIN N° TYPE DIRECTION DESCRIPTION ON DB9 ON J10 Ground AGC Alarm Digital Output 0V = Alarm 5V = Normal AGC Alarm Digital Output 0V = Alarm 5V = Normal Not used Not used Not used Nout used Analog Output Forward power...
Page 35 SCH0223AR1 Top layer Component layout...
Page 36 SCH0223AR1 Bottom layer Component layout...
Page 37 SCH0223AR1 COMPONENT LIST Part Name/Number Description Qty. Comps. Page 1/2 BATT BH001RB 3093_90 03093 03090 BATTERY HOLDER BATT1 CC 100nF-S 01065C 01065C Y5V 1206 CAPACITOR C2, C7-10, C12, C16, C19, C21-27, C29, C31, C33, C37-40, C44-46, C49, C58-61, C63, C65, C66-69, C74, C76, C78-81, C83-84, C87, C90 CC 15pF-S 01088 01088 SMD 1206 CAPACITOR...
Page 38 Part Name/Number Description Qty. Comps. Page 2/2 IND T100uH-1.8A 4958 04958 TOROIDAL-STORAGE J CON HD515V/05-4PVE 02881+02882 PANDUIT PCB CON. 1 J DB9_F-0° LT 02794 PCB CONNECTOR DB9 J FC-10P 02697-02699 02697+02699 PCB CONNECTOR J1-2, J6, J8-12 J FC-16P 02701-02700 02701+02700 PCB CONNECTOR J PAN2 02739 02739 PCB CONNECTOR J5, J7...
Page 39 MAINS DISTRIBUTION BOARD SCH0265AR0 SCH0265AR0 Component layout SCH0265AR0 COMPONENT LIST Part Name/Number Description Qty. Comps. CC 2nF2 2kV 01045A 01045A CERAMIC CAPACITOR C1-2 CNV AC-DC ATC-12S E0037 AC DC CONVERTER CNV1 D 1N4148 03001 03001 DIODE D1-2 DL LEDG3 03053 03053 GREEN LED DIODE 3mm J CON HD515V/05-4PVE 02881+02882 PANDUIT PCB CON.
Page 40 POWER SUPPLY INTERFACE BOARD SCH0288AR1 SCH0288AR1 Component layout SCH0288AR1 COMPONENT LIST Part Name/Number Description Qty. Comps. CC 1nF-S 01096 01096 SMD 1206 CAPACITOR C1-16 DZ 5V1-S 03128 03128 SMD ZENER DIODE DZ1-8 J FC-10P 02697-02699 02697+02699 PCB CONNECTOR J2-3, J6-7 J FC-10P PCB FEMALE 02706 PCB FEM.
Page 41 LDMOS UHF AMPLIFIER MODULE MTF0070CR0 DESCRIPTION The MTF0070C is the RF Amplifier module of the AUTV/1500LD based on LDMOS technology. The RF Amplifier module is composed by eight broadband amplifier boards (SCH0192A) coupled together by means of Wilkinson combiners, driven by means another amplifier board. The module also includes the cooling heatsink and a small Interface board (SCH0221A) which forwards power supply to the two stages, groups the power and temperature into a single connector, more easily managed inside the transmitter.
Page 43 SCH0192A SCH0192A RF AMPLIFIER BOARD #1 RF AMPLIFIER BOARD #5 SCH0192A SCH0192A RF AMPLIFIER BOARD #2 RF AMPLIFIER BOARD #6 SCH0192A SCH0192A RF AMPLIFIER BOARD #3 RF AMPLIFIER BOARD #7 SCH0192A SCH0192A RF AMPLIFIER BOARD #4 RF AMPLIFIER BOARD #8 FLORIDA 32-1123 SCH0192A...
Page 44 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 45 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 (± 1dB) Compare to the typical curve eclosed - Adjustment procedure Polarisation current calibration 32V stabilised power supply 10A amperometer...
Page 46 Solder a wire STEP 4: Fastening of the LDMOS transistors: after properly cleaning the plate surface, smear a thin layer of silicone fat on the lower side of the flange of the MOSFETs, fasten them to the heat sink and solder the gate first, then the drain.
Page 47 SCH0192AR0 LDMOS UHF Amplifier Board Component layout...
Page 48 SCH0192AR0 COMPONENT LIST Elettronika Code Description Manufacturer, Mfr. Code Comps. 00045A 2K2 1206 5% 1/4W RESISTOR PHICOMP, RC1206JR072K2L R1-4 00042A 1K2 1206 1% 1/4W RESISTOR PHICOMP, RC1206FR071K2L R5-6, R9-10 00800 50K 3.8" SQUARE TRIMMER BOURNS, 3296W-1-503 R7-8 00056B 18K 1206 5% 1/4W RESISTOR PHICOMP, RC1206JR0718KL R11-12 00075A...
Page 49 AMPLIFIER INTERFACE BOARD SCH0221AR0 SCH0221AR0 Component layout SCH0221AR0 COMPONENT LIST Part Name/Number Description Qty. Comps. CC 100nFAVX 01065A 01065A CERAMIC CAPACITOR C1, C3, C6, C8 CE 100uF100V 01795B ELET. CAPACITOR CE 100uF50V 01795 01795 ELET. CAPACITOR CE 10uF35V-S 01778A 01778A ELET. SMD CAPACITOR 2 C4-5 D 1N4007 03009 03009 DIODE...
Page 50 SP500-27/48 DE2 SWITCHING POWER SUPPLY E0012 - 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 51 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 ±...