Elettronika AUTV/3500LD User manual

AUTV/3500LD
LDMOS - UHF TV Solid State Amplifier
Users manual
CODE: APT137BM TITLE: AUTV/3500LD REV: 0 DATE: 09/06/05

SS 96 Km 113
70027 Palo del Colle (Ba) ITALY
Tel. [phone]
Fax [phone]
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 Technical characteristics .......................................................................................... 15
Section 2 - Installation ..................................................................................................... 17
2.1 Operating environment ............................................................................................ 18
2.2 Preliminary operations ............................................................................................. 18
2.3 Telemeasuring socket connections ......................................................................... 19
2.4 RS232, RS485 and AGC Socket connections ......................................................... 19
2.5 Preventive maintenance .......................................................................................... 20
Front panel .................................................................................................................... 21
Rear panel ..................................................................................................................... 22
Section 3 - Operation....................................................................................................... 23
3.1 Operation ................................................................................................................. 24
3.2 Display ..................................................................................................................... 25
3.3 Menu ........................................................................................................................ 25
- RF Powers ................................................................................................................ 27
- Power Supply ........................................................................................................... 27
- Log/Alarms ............................................................................................................... 27
- Working timer ........................................................................................................... 28
- Thresholds ............................................................................................................... 28
- RMS/Peak................................................................................................................ 29
- Date/Time ................................................................................................................ 29
- Display ..................................................................................................................... 29
- Frequency (only for FM Amplifiers) .......................................................................... 30
- Slave address .......................................................................................................... 30
- Remote .................................................................................................................... 30

- Interlock .................................................................................................................... 30
- Firmware release ......................................................................................................31
- Serial number .......................................................................................................... 31
Section 4 - Diagram ......................................................................................................... 33
Cable diagram ...............................................................................................................34
AUTV/1500LD Component layout ................................................................................. 35
RF section Block Diagram ............................................................................................. 36
MTF0070BR0 Amplifier module - Component list ............................................................ 37
APT117B AUTV/1500LD - Component list ....................................................................... 39
SCH0192AR0 (200W UHF LDMOS Amplifier module) ................................................ 41
- Calibration procedure............................................................................................... 42
PN1010AR2 (8 Way coupler for 1kW LDMOS) ............................................................. 50
PN1014AR2 and PN1015AR2 (a Way Wilkinson left and right) .................................... 53
PN1057AR1 (2 Way Wilkinson for 1,5kW LDMOS) ....................................................... 56
SCH0223AR1 (Control board and display) ................................................................... 58
- Description ............................................................................................................... 58
- Power Supply ........................................................................................................ 59
- Connectors ........................................................................................................... 59
- Firmware update .......................................................................................................64
SCH0221AR0 (Amplifier interface)................................................................................ 75
SCH0215AR0 (Mains distribution board) ...................................................................... 77
E0026 (1kW 32Vdc Switching power supply) ................................................................. 79

5
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.

6
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. 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 customs 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 of the tube who needs to use, and as such to replace immediately the product, will have
to buy a new one and provide to the relevant payment, further to the issuing by the seller of a regular commercial invoice. After the adequate tests made
by the manufacturer, should the result be positive, that is confirm the defect in manufacturing, the seller will issue a regular credit note in the name of
the buyer and return the amount paid. Should the result be negative, that is detect a negligence in the installation or use by the buyer, he will have no
right against the seller.
Warranty

7
INTRODUCTION
The apparatus described in this manual is the latest of this series, offering high performances, remark-
able reliability and a wide range of characteristics, it all at a low cost.
Its is easy to install and use. It only takes to follow the installation procedure as shown in this manual:
after having removed all from the package, you only have to follow step by step the description in the
various sections.
Before starting to use the apparatus, remember to:
read carefully the general safety information contained in this section;
follow the instructions for the installation and set up of the apparatus;
read all the remaining sections of this manual in order to know well the apparatus and learn
how to obtain the best of its characteristics.
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. Each individual
chapter represents a single apparatus composing the whole station.

8
WARNING!
The currents and voltages in this equipment are dangerous!
Personnel must at all times observe safety regulation!
This manual is intended as a general guide for trained and qualified personnel who are aware of the
dangers inherent in handling potentially hazaedous electrical and electronic circuits.
It is not intended to contain a complete statement of all safety precautions which should be observed by
personnel in using this or other electronic equipment.
The installation, operation, maintenance and service of this equipment involves risks both to personnel
and equipment, and must be performed only by qualified personnel exercising due care.
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.
During installation and operation of this equipment, local building codes and fire protection standards
must be observed.
WARNING!
Always disconnect power before opening covers,
doors, enclosures, gates, panels or shields.
Always use grounding nsticks and short out high
voltage points before servicing. Never make
internal adjustments, perform maintenance or
service when alone or when fatigued.
Do not remove, short-circuit or tamper with interlock switches on access covers, doors, enclosures,
gates, panels or shields.
Keep away from live circuits, know your equipment and dont take chances.
WARNING!
In case of emergency ensure that power has been disconnected.

9
A - AIRWAY
If unconscious, open airway lift up neck, push
forehead back, clear out mouth if necessary,
observe for breathing.
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
B - BREATHING
If not breathing, begin artificial breathing. Tilt
head, pinch nostrils, make airttght seal, 4 quick
full breaths. Remember mouth to mouth resuscita-
tion must be commenced as soon as possible.
C - CIRCULATION
Check carotid pulse. If pulse
absent, begin artificial circulation.
Approx. 80sec.: 1 rescuer, 15 compressions, 2 quick breaths.
Approx. 60sec.: 2 rescuers, 5 compressions, 1 breath.
NOTE: DO NOT INTERRUPT RHYTHM OF COMPRESSIONS WHEN
SECOND PERSON IS GIVING BREATH.
Call for medical assistance as soon as possible.

10
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. The following information is not intended to be
a complete first-aid procedure, it is brief and is only to be used as a reference. It is the duty of all
personnel using the equipment to be prepared to give adequate Emergency First Aid and thereby pre-
vent avoidable loss of life.
TREATMENT OF ELECTRICAL BURNS
1) Extensive burned and broken skin.
- Cover area with clean sheet or cloth (cleansed available cloth article);
- do not break blisters, remove tissure, remove adhered particles of clothing, or apply any salve or
ointment;
- treat victim for shock as required;
- arrange transportation to a hospital as quickly as possible;
- if arms or legs are effected keep them elevated.
NOTE
If medical help will not be available within an hour and the victim is conscious and not vomiting, give
him a weak solution of salt and soda: 1 level teaspoonful of salt and 1/2 level teaspoonful of baking
soda to each quart of water (neither hot or cold).
Allow victim to sip slowly about 4 ounces (half a glass) over a period of 15 minutes.
Discontinue fluid if vomiting occurs (do not give alcohol).
2) Less severe burns - (1st & 2nd degree).
- Apply cool (not ice cold) compresses using the cleansed available cloth article;
- do not break blisters, remove tissue, remove adhered particles of clothing, or apply salve or ointment;
- apply clean dry dressing if necessary;
- treat victim for shock as required;
- arrange transportation to a hospital as qickly as possible;
- if arms or legs are affected keep them elevated.

11
LDMOS - UHF TV AMPLIFIER
AUTV/3500LD
Users manual

12
INTRODUCTION
The AUTV/3500LD belongs to the High Power UHF products family of Television Transmitters fully in solid
state technology.
The AUTV/3500LD series represents the 3,5kW TV Transmitters operating in the IV/V Band for Common
amplification process (separate amplification available) of the Vision and Sound carriers. This Transmitters
family has been designed to offer to the customer high performances, high reliability and greater simplicity in
their operation and maintenance procedures.
The Vision and Sound signal processing is provided for all TV Standards and all types of Audio applications
(Mono & Dual sound - NICAM) together with colour systems such as PAL - NTSC - SECAM. Thanks to
the amplitude and phase pre-correction circuit, it is possible to cancel the distortions in the output stage, thus
cutting down the operating costs. The RF transposition in the driver is carried out by a synthesizer with various
possibilities of accuracy and stability as well as precision offset locked by internal or external frequency
reference.
The RF amplifier is made up by three RF modules installed in a power rack, the modules are dedicated for the
Vision and Sound carriers common amplification. The amplifiers employ solid state LDMOS technology in
order to obtain wide band, reliability, and high efficiency. Each RF module has a built-in switching-mode
power supply unit, self-protected against overcurrents and overvoltages, as well as overtemperature and
VSWR for RF parameters. The cooling system is fully contained into the transmitter. The control unit provides
full management of the transmitter without the presence of the operator, the system includes a central controller
and several peripheral units installed in each RF module and rack. The control device includes a fault finding
system to detect equipment malfunctions and locate the faulty subassembly which needs to be replaced. The
interlock circuit is independent on the software and remains always operational whether computer control is
present or not. The operator interface is made by a high resolution LCD graphic display and a simple keyboard,
the menu is very friendly and easy to use.
The Control Unit can be fully controlled in REMOTE mode via link or via modem in RS232 or other interface.
The equipment design allows the soft degradation (RF power loss) for several transistors faults.
AUTV/3500LD
LDMOS - UHF TV SOLID STATE AMPLIFIER

13
TECHNICAL CHARACTERISTICS
RF SECTION
Frequency range 470 - 860MHz
Output power 3,5kW PEP
Vision / Sound power ratio 10/1 single sound - 20/1/0.2 dual sound
Out stage technology Solid State LDMOS
Vision / Sound amplification Common
Standards G, K, I, M
Sound transmission FM single sound - Dual sound coding IRT - NICAM 728
Harmonics and spurious emission In compliance with CCIR rec.
Intermodulation products from vision and sound < = 56dB
Frequency stability 2,5ppm (option 0,05ppm)
VISION SECTION
Video input BNC 75Wconnector
Nominal input level 1Vpp ± 6dB
Return loss > = 30dB
DC Restoration Clamped to the blanking level without affecting the burst
White limiter At 90% picture signal without affecting the chrominance
Transmission characteristics
Sideband spectrum response According to the standard
Amplitude frequency response According to the standard
Group delay variation without receiver
pre-correction and TV demodulator in flat < = ± 35ns
Non linearity distortion (10 to 75% mod.) < = 5%
Differential gain (10 to 75% mod.) < = 5%
Differential phase (10 to 75% mod.) < = 5°
Signal to random noise ratio (weighted 0.2 to 5MHz) > = 60dB
Blanking level variation < = 2%
2T k factor < = 2%
SOUND SECTION
Nominal input level (± 50kHz dev.) -10 to +8dBm
Input impedance 600Wbalanced
Pre-emphasis 50ms
Transmission characteristics
Amplitude-frequency response 40 to 15000Hz ± 0.5dB
Total harmonic distortion < = 0.5%
FM Signal to noise ratIO
(referred to ± 50kHz dev. f = 400Hz) > = 60dB (weighted)

14
AM Signal to noise ratio > = 50dB (referred to 100%)
AM Synchronous modulation < = 40dB (referred to 100%)
REMOTE CONTROL
Parallel interface On/Off, Alarms, Interlock
Serial interface RS232 (Full monitoring and management)
GENERAL
Power supply voltage 3x380VAC, ±10% (other on request)
Frequency 50-60Hz, ± 5%
Temperature operating range 0 to 45°C
Altitude Up to 2.500 meters (> = 2.500m with additional cooling system)
Power consumption (cooling system included) < = 10,2kVA (black level)
Power factor > = 0.9
Cooling Forced air
Dimensions Rack 19-36U

AMPLIFIER CONTROL
O
MICROPROC ESSOR C ONTROLL ED SYST EM
RS2 32
CODE: APG012C TITLE: AMPLIFIER CONTROL REV: 1 DATE: 10/02/04

16
1.1 CONTROL SYSTEM OVERVIEW
The control system is made up by some Slave boards, which check locally the amplifier modules, and a
Master board to monitor the status of the Slave boards in each module and show on a graphic display all
the checked parameters.
The number of the Slaves changes depending on the output power of the amplifier. The communication
between Master and Slaves is made via RS485 standard. The Master board reads the overall parameters of
the equipment (Forward and Reflected power and Unbalancing), polls (interrogaes in sequence) the local
boards, shows on the display the values requested by the user, indicates alarm conditions, if any, and allows
to change some of the operating parameters of the apparatus. Besides it realizes a serial data interface to an
external system able to analyse the working parameters of the equipment, using the RS232 and RS485
communication protocols.
1.2 FUNCTIONS
At start-up, the display of Amplifier Control module shows an informational message concerning the equipment
and its firmware version.
- Main menu
The main menu has: a list of the amplifier modules, the measure of some parameters of the power in antenna,
a window with icons to show the alarm status (Alarm Status Window) and some general information, that is
date, time, temperature inside the module and, for FM equipment, transmission frequency.
The following picture is an exact representation of the main menu screen.
AMPLIFIER CONTROL
O
MICROPROCESSORCONTROLLED SYSTEM
RS2 3 2

17
if the communication with the slave is correct and then
if the communication with the slave is interrupted
ON
if the amplifier module is OFF
OFF
if the amplifier module is ON
In the Amplifier List, next to each module, the following symbols can be found:
The UP and DOWN arrow keys allow to select one of the slave, the alarm list, or a menu allowing to change
some settings of the control module and the apparatus; the RET key is used to confirm the selection.
In the main and slave menu the Alarm Status Window (which position is indicated by an arrow in the picture
below) is shown: the gate symbol displays the status of the INTERLOCK, in case of alarm this icon blinks
and the buzzer ringgs.
The INTERLOCK signal is a control available to the user to manage an ON/OFF sensor.
When the relevant PIN is grounded, the Master board does not signal any alarm, as soon as the PIN is left
floating, an alarm is detected; the rotating screw symbol shows that the FANS work normally; in case of alarm
this icon blinks and the buzzer rings; the bell symbol appears in case of alarm detected by the control module
or the amplifier. It blinks if the alarm condition is terminated and the alarm itself can be displayed in the Alarm
List.
If one of the parameters of a Slave or any of the ones directly checked by the Master is alarmed, the general

18
Note that no numerical value is shown for amplifiers which are not communicating with the control module.
alarm LED and the alarm icon blink until the Alarm List is checked to see the type of alarm occurred.
Besides, if an alarm for any of the powers of the signals in antenna occurs, the relevant measure in the
Antenna window of the display and the relevant LED on the front panel of the Master module blink until the
measure decreases below the threshold level, determined by the nominal power of the amplifier.
If the slave modules are working and an INTERLOCK or FANS alarm occurs, aside from the indication
explained above, the amplifiers are switched off. This happens immediately after an INTERLOCK alarm, or
about 7 seconds after a FANS alarm is detected.
In case the amplifiers are communicating but switched off, or they are not communicating and the INTERLOCK
alarm contact is open, a WARNING condition occurs: buzzer on and blinking ALARM LED on the front
panel; while if it is the FANS alarm contact to be open, the icon of the alarm appears in the box.
Further to any of these two alarms it is possible to choose whether to turn off the amplifiers or not. In fact,
there is a submenu of the Settings menu which allows to choose whether to turn off the amplifiers connected
to the control module as a consequence of an INTERLOCK and FAN alarm.
- Slave menu
By selecting one of the slaves, it is possible to see all the parameters of that amplifier module in two pages. The
first one shows voltages and currents Power Supply, the second one shows RF Powers: forward and reflected
power, temperature and, for some amplifiers, unbalancing and input power. The UP and DOWN keys allow
to scroll the local measures of all the slaves, page by page. The ESC key is used to go back to the main menu.
The following pictures show the menu screen of one amplifier.

19
- Alarm List
By selecting the Alarm List, 26 pages listing the latest 130 alarms saved are shown. Each page shows 5
alarms, each contained in a box providing the following information: progressive number of the alarm, starting
with the most recent; number of the module in which the alarm occurred, following the Blk. Message (the
indication AC means that the alarm occurred in the Amplifier Control module); parameter in alarm, date and
time of the alarm. Next to the parameter showing the alarm type there may be a bell symbol. In case it is not
here, the alarm event has been communicated by an amplifier connected to the control module. These events
are different and on option of the Settings menu allows to choose whether they are displayed or not in the
alarm list.
The saved alarm can be deleted by keeping simultaneously pressed theUP and DOWN keys. The ESC key
is used to go back to the main menu. The picture shows a page of the list, containing both alarms and general
events.
1.3 PROGRAMMING MODE
The Settings menu gives access to programming mode. As shown below, the menu offers a list of settings next
to a window showing the default parameter set, or the one selected previously, when the pointer is moved on
the relevant options.
The menu under the cursor is accessed by pressing the RET key. This is shown by the Enabled Menu. Once

20
Description of the submenus included in Settings.
SUBMENU OPERATION
Update the time and date shown in the main menu box.
Selection of the analogue voltage signal (PEAK or RMS) to convert and
display the Forward power in antenna. A message in the main menu screen
confirms current choice.
It is possible to remotely control the apparatus, thus to monitor the parameters
shown on the display of Amplifier Control module and check the status of the
transmitter.
This is done through RS232 or RS485 standard serial communication, digital
and analog inputs through the DB25 telemetering connector on the rear panel
of the Amplifier Control module.
If the Local mode is set in this menu, the control module and the apparatus
can only be controlled locally, and a remote command is ignored. If Remote
is set instead, the REMOTE LED on the front panel of the module lights up
after going back to the main screen. From then on, incoming remote commands
from either the serial port or the telemeasuring connector on the rear panel
are handled (Note 1).
Clock / Date
FWD Read Mode
Remote Control
the menu is accessed, it is possible to change the value of the displayed fields or select a function by means of
the arrow keys. The RET key is used to confirm the selection (an acoustic signal should be heard). The ESC
key (or no key pressed for more than 7 seconds) sends back to the setting list. Pressing it again (or pressing
no key for more than 10 seconds) brings back to the main menu.
Every selection made in the Settings menu is stored into the EEPROM until it is changed again, this allows to
remember the settings status after an equipment reset.