Elettronika TXUD2000A User Manual

TXUD2000/ATSC UHF TV Transmitter

CODE TXUD2000/ATSC TITLE TXUD2000/ATSC UHF TV TRANSMITTER REV 0 DATE 11/02/09

Registration number: IT-17686

Registration number: IT-24436

SS 96 Km 113

70027 Palo del Colle (Ba) ITALY

T el. [phone]

Fax [phone]

E-mail: [e-mail]

Web site: http://www .elettronika.it

WARNING

The apparatus described in this manual has been designed and manufactured with devices to safe­guard 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 inci­dental 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.

3

Warranty

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.

4

INTRODUCTION

The apparatus described in this manual is the latest of this series, offering high performances, remark­able reliability and a wide range of characteristics, it all at a competitive 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.

5

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 sticks 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.

6

Treatment of electrical shock

1) If victim is not responsive follow the A, B, C’ s of basic life support.

PLACE VICTIM FLA T ON HIS BACK ON A HARD SURF ACE

A - AIR WA Y

If unconscious, open airway lift up neck, push

forehead back, clear out mouth if necessary,

observe for breathing.

B - BREA THING

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 - CIRCULA TION

Check carotid pulse. If pulse

absent, begin artificial circulation.

Call for medical assistance as soon as possible.

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 BREA TH.

7

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 pre­vent avoidable loss of life.

TREA TMENT 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.

8

Communication N°1 -2002/95/CE - RoHS Directive

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;

2) Such devices must be brought to proper centres able to perform the adequate processing in order to
recycle their parts where possible and dispose of the raw materials contained therein;

3) For equipment purchased from Elettronika after the 13th of August 2005, the gathering, transport, processing,
recycle and disposal operations are responsibility of Elettronika who will bear all related expenses;

4) For equipment purchased from Elettronika before the 13th of August 2005 , the gathering, transport,
processing, recycle and disposal operations are responsibility of Elettronika, who will bear all related expenses,
only if you are purchasing from us new equipment in substitution of the disposed one;

5) Electric and electronic devices contains lead in soldering, cables, etc. This substance pollutes the environment
and may be accumulated in the organism of plants and mammals. It is dangerous for humans because it may
affect blood, bone marrow, peripheral and central nervous system and kidneys, causing anaemia,
encephalopathies (e.g., convulsions), peripheral neuropathies, cramps of the abdomen and kidney damages.
Besides it affects human reproduction and growth.
These devices also contain mercury . From the environmental point of view, this substance is highly toxic for
aquatic life, and can be accumulated in the organism of fish.
Long-term damages to humans can affect the central nervous system and the kidneys, producing irritability ,
emotional instability , tremors, damages to the mind and the memory , language disorders. It may also irritate
and whiten the gums, and its effects may be cumulative. Based on tests on animals, it may affect the human
reproduction or growth.
There is also chrome, which may result in irritation of the eyes and respiration system.
Cadmium is also present. In humans it may damage lungs, due to repeated or prolonged contact with its dust,
and kidneys. It may cause cancer .

6) The symbol below marks the devices which cannot be disposed of along with normal wastes, as stated in

1) and 2) above.

7) The payment of fees is foreseen for the non-allowed disposal of such devices.

9

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10

TXUD2000/ATSC

UHF TV TRANSMITTER

User’s manual

11

TXUD2000/A TSC UHF TV TRANSMITTER

DESCRIPTION

The TXUD2000/A TSC belongs to the High Power UHF products family of T elevision Transmitters fully in
LDMOS solid state technology .
The TXUD2000/ATSC series represents the 2kW ATSC TV transmitter operating in the UHF Band for
Common amplification process (separate amplification available) of the V ideo and Audio carriers and for
Digital TV signals of different standards. 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 V ideo and Audio signal processing is provided for all Analogue and Digital TV Standards and all types of
Audio applications (Mono and Dual Sound - NICAM) together with colour systems such as P AL - NTSC ­SECAM. The transmitter ensures optimal performance also with Digital TV signals (DVB-T , A TSC, DTMB,
etc.). 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.
When equipped with a dual-mode exciter (Analogue and DVB-T), the transmitter can quickly and easily
switch from analogue broadcasting mode to DVB-T broadcasting mode (and vice versa), to enable a
comfortable operation during the transition period to the full-digital broadcasting time.
The RF Amplifier is made up by four RF Amplifier Modules installed in a power rack; the modules are
dedicated for the V ideo and Audio carriers common amplification and for Digital TV 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 Amplifier 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. Controller and peripherals are connected by a RS485 full-duplex bus.
Power supply output voltages and currents, Forward and Reflected Powers of any single power amplifier are
monitorized by Amplifier Control unit.
In that way there is a single interface point between user and all the transmitter. The operator inter-face is
made by a high resolution LCD graphic display and a simple keyboard, the menu is very friendly and easy to
use.
The Amplifier 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.

12

TECHNICAL CHARACTERISTICS

RF SECTION

Analog Operation

Frequency Range ............................................................................................................................................. 470 - 860MHz

Output Power .......................................................................................................................................................... 5kW PEP

Gain (±2)......................................................................................................................................................................... 27dB

Video / Audio Power Ratio ...................................................................................... 10/1 single sound - 20/1/0.2 dual sound

Out Stage Technology ............................................................................................................................Solid State LDMOS

V ideo / Audio Amplification ..................................................................................................................................... Common

Standards ................................................................................................................................................................ G , K, I, M

Sound Transmission .................................................................... FM single sound - Dual sound coding IRT - NICAM 728

Harmonics and Suppression Emission..................................................................................... In compliance with CCIR rec.

Intermodulation Products from V ideo and Audiio.......................................................................................................< 50dB

Frequency Stability .........................................................................................................................2.5ppm (option 0.05ppm)

RF Input Connector ................................................................................................................................................ N Female

RF Output Connector........................................................................................................................................... EIA 1+5/8”

Digital Operation

Output Power (DVB-T) ......................................................................................................................................1200W RMS

Output Power (A TSC)........................................................................................................................................ 2000W RMS

DVB-T Modes......................................................................................................... All the modes listed in ETSI EN 300 744

DVB-T MER ....................................................................................................................................................... > 33dB RMS

DVB-T Shoulders Attenuation (After non-critical mask 6-cavity filter) ............................................................. > 40dB RMS

DVB-T Output Spectrum ............................................................................................................. Compliant ETSI EN 300 744

A TSC Symbol Rate ...................................................................................... 10.76MBaud/s (Compliant to A TSC Doc. A/53)

A T SC SN R .........................................................................................................................................................> 27dB RMS

A TSC Shoulders Attenuation (After simple mask cavity filter ref. total output power) ..................................... > 46dB RMS

A TSC Output Spectrum ......................................................................................................... Compliant to A TSC Doc. A/64

VIDEO SECTION

Video Input ...........................................................................................................................................BNC 75Ω Connector

Nominal Input Level............................................................................................................................................. 1Vpp ±6d B

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 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 V ariation ................................................................................................................................................ < 2%

2T k Factor .....................................................................................................................................................................< 2%

13

AUDIO SECTION

Nominal Input Level (±50kHz dev.) ...................................................................................................................-10 to +8dBm

Input Impedance ............................................................................................................................................ 600Ω balanced

Pre-emphasis .................................................................................................................................................................. 50µs

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)

AM Signal to nokise ratio ............................................................................................................. > 50dB (referred to 100%)

AM Synchronous Modulation ..................................................................................................... > 40dB (referred to 100%)

METERING

Output Forward Power (Peak or RMS)
Output Reflected Power (Peak or RMS)
Unbalance Power (last unbalance load in output combiner)
Transmitter T emperature
Power Amplifier Forward Power (Peak or RMS)
Power Amplifier Reflected Power (Peak or RMS)
Power Amplifier Input Power (Peak or RMS)
Power Amplifier Heatsink Temperature
Pallet Current
Power Supply Voltage
W orking Timer

INDICATIONS

Cooling Blower W orking (with icon on front display)
Transmitter Interlock (with icon on front display)
Alarm (with red LED on front panel)
Transmitter ON/OFF (with green LED on front panel)
Remote ON/OFF (with orange LED on front panel)
Input Mains Phase Missing (with green LED on Power Control panel)

PROTECTIONS

Mains Phase Lack
Output Forward Power
Output Reflected Power
Rack Cooling Failure
Power Amplifier Forward Power
Power Amplifier Reflected Power
Power Amplifier Heatsink Temperature
Module Current
Power Supply Voltage

REMOTE CONTROL SECTION

Parallel Interface........................................................................................................................... ON/OFF, Alarms, Interlock

Serial Interface ...................................................................................... RS232 or RS485 (Full monitoring and management)

14

GENERAL

Power Supply Voltage ................................................................................................... 3P+N 380V ±15%, 3P+N 230V ±15%

Power Supply Frequency ........................................................................................................................................ 50 - 60Hz

Power Factor .................................................................................................................................................................> 0.98

Analog Power Consumption (Black) ....................................................................................................................... 13.45kV A

Digital Power Consumption (DVB-T) .......................................................................................................................... 9.0kVA

Digital Power Consumption (ATSC) ......................................................................................................................... 10.2kV A

Housing .........................................................................................................................................................1 Rack 19”-42U

W eight (Amplifier / Rack)................................................................................................................................. 485kg / 500kg

AirFlow ................................................................................................................................................................... 2500m3/h

Temperature ..................................................................................................................................................... -5°C to +45°C

Isolation Transformer (Power / W eight)...........................................................................................................20kV A / 250kg

Specifications and characteristics are subject to change without notice

15

INST ALLA TION REQUIREMENTS

This section explain how to install and configure the transmitter for your location All internal switching and
setup should be done by qualified service person.

PARAMETER REQUIREMENTS

TRANSMITTER

ROOM

INSTALLATION

AREA

TEMPERATURE

ELECTRICAL

PLANT

MAINS SYSTEM

AIR COOLING

ANTENNA

The room should be clean and free of dust. The building floor
shuold be able to support a load capacity >1000kg/m

2

The transmitter should be ins talled to have space around enough

for ventilation and for maintenance actions to be allowed.

The minimun requirement space is one meter outer boundary of

transmitter.

The transmitter is designed to work from -5° up t o 45°C, anyway

to ensure long life is better to keep the room temperature lower
than 35°C.

The transm itter p ower c onsumpti on is <10.2kVA (13.45kVA in
analog mode), we suggest to design the main power line
capacity increased by at least more than 50%.

The mains system should be three phase with neutral. The

trasmitter is available in two different mains voltage models for

380VAC and 230VAC system.
Th e ou t let air sh oul d be con v oy ed ou t of th e room by su itable d uct s

(the transmitter air output adapters has a diameter of 320mm).
The air flow required is 2500m

3

/h.

Th e t ransmit ter RF ou t pu t int erf ace is EIA 1+5 /8” (others interface
can be supplied on request in order to match the antenna feeder
or com biner inp ut) . The RETUR N LOSS of t he system s hou ld be
greater than 27dB in the operation channel.

Note: the standard cooling system is supplied with internal ventilation system, air inlet and outlet ar e
on the top. Other different installations can be proposed for various air connection arrangements.

16

SWITCH ON PROCEDURE

Before to switch on the Transmitter is extremely important to check:

- The right connections for the RF system (antenna or external combiner) and take greatest care for the Inner

in each coaxial connections;

- the right connections with the Mains Power Supply network, the Neutral line must be present and connected,

and the correspondence with the voltage nominal value request;

- the right working of the earth-ground connections system, for people safety and transmitter right operation;

- the right connections inside the transmitter with input/output RF cable to/from amplifier block and combiner/

divider system, if for transport or installation reason you had disconnected them before.

T o follow with first switch on please follow the below indications:

- Set in OFF position all the frontal switch, Main, Amplifier Control and Amplifiers Block;

- turn ON the Mains and the Amplifier’ s switch. The Amplifier Control checks the communications with the

amplifier block. If the communication is ok you can turn ON the Amplifier Control, now automatically the
rack’s blowers and the exciter are switched ON;

- give little power in to the amplifier and check if all the indicator are in the right situation (no reflected, no

unbalance on the Amplifier Control, more or less the same indication for current and power for all the
amplifiers block);

- increase the power slowly slowly . At rated maximum output power some watts might be shown as Reflected

Power due to isolation of directional coupler or return loss from antenna system.

EXCITER DESCRIPTION

The ATSC TRANSMITTER is an 8-VSB A TSC professional exciter , designed for the most demanding
digital TV broadcasting applications. It integrates a modulator module with up-to-date FPGA technology and
advanced digital signal processing algorithms in order to generate an absolutely accurate output 8-VSB signal,
with exceptionally optimized modulation and the output filtering techniques.
V ery high linearity performances are possible thanks to very careful RF design over the entire VHF and UHF
bands and with an optimal digital precorrection engine working simultaneously in the time and frequency
domains. A high degree of reliability is guaranteed, moreover , by the use of oversized cooling devices and by
control circuits operated by modern microprocessor technologies. The A TSC TRANSMITTER can be used
as a stand-alone 5W RMS transmitter or as a driver stage for amplifiers of greater power . The excellent
spectral purity of the conversion oscillator lets the A TSC TRANSMITTER radiate an 8-VSB signal with an
excellent MER value. The A TSC TRANSMITTER is equipped with a powerful ASI/SMPTE inputs management
block which allows to manage the Transport S tream (TS) inputs in a fully redundant configuration, thus
significantly improving the reliability of the whole broadcasting system in every operating condition.
The ATSC TRANSMITTER is totally compliant to the A/53, A/54 and A/64 A TSC recommendations with
6MHz output channel bandwidth, in VHF and UHF bands.

17

RF AMPLIFIER MODULE DESCRIPTION

The RF Amplifier Modules place in the TXUD2000A TSC Transmitter station are equipment designed to
simplify transport and installation. Born to ensure high working reliability they excel also for their great
performance.
Thanks to the excellent linearity of the amplifiers, achieved with the use of the state-of-the-art LDMOS
(UHF) technology , these equipment allow excellent performance both with analog and digital TV signals.
The design redundancy (a power supply for every MOS device), the oversized unbalanced power dummy
loads, the wide input range of the switching-mode power supplies, allow a NO STOP transmission 24h per
day . The temperature of the amplifiers is guaranteed by a forced air cooling system extremely noiseless.
The presence of Amplifier Control that collects all measures from amplifiers and from antenna system ensure
a single control point to access to all MOSFET currents, power supplies voltages, temperature of the heat
sinks, amplifiers output powers together with the RF power reading of the output antenna system.
A multifunctional display on the Amplifier Control makes it possible to verify all the operating parameters of
the unit. The amplifiers in the series are remotable by wired telemetry connector or by serial communication,
RS232 on front panel or RS485 on rear panel of the Amplifier Control.

CHANNEL CHANGE PROCEDURE

T o proceed with a channel change operation, please follow the below indications:

- Follow the channel change indications on users manual of the exciter;

- from each RF Amplifier Modules select the new closest channel frequency;

- tune the Bandpass Output Filter on new channel;

- if the difference with the two channel is less than 10 you don’t need to change the power amplifier phase

balance. Otherwise, connect a digital meter to a DC Monitor (BNC) on each dummy load and keep low the
value, by tuning the microstrip length on the input divider;

- connect a W attmeter and a Dummy Load;

- set the rated output power and tune the right Forward Power indication on the Amplifier Control display;

- set the output at 10% of the rated ones, swap the Forward and Reflected cable on the rear of the Amplifier

Control and set the reflected indication.

The 3dB Output Coupler is a wide band type and don’t need any tuning operations.

DIGIT AL UPGRADE

The amplifier is ready to operate with a DVB-T signal keeping the same analogue high performance.

- Replace the analogue Bandpass Filter with a digital ones (critical or not critical mask are well supported);

- select the RMS Detector instead of peak one on Amplifier Control and on each power amplifier to have the

right power indication and the new power alarm threshold;

18

- replace the analogue Cxciter with a DVB-T ones. If you use a DVB-T Modulator with IF output you can

use the IF VEGA input;

- the output power should be around 1/4 (in DVB-T mode) or 1/3 (in A TSC mode) of the analogue rated power

(for example: the 5kW = 1.2kW rms in DVB-T mode or 5kW = 2.0kW rms in ATSC mode).

19

Component list APT200B/ATSC

Elettronika Code Description Qty Page 1/2

01404 BYPASSING CAP ACITOR 2
02015 BNC CONNECTOR FOR RG58 CABLE 7
02408 90° 7/16” MALE-90° 7/16” FEMALE CONNECTOR 1
02459 EIA 1+5/8” INNER CONNECTOR 1
02502 SMA SOCKET FOR RG58 CABLE 3
02526 EIA 1+5/8” RIGID LINE 1.00
02527 EIA 1+5/8” ANGLE 5
02791 DB9 MALE SOCKET P ANEL MOUNTING 7
02844 2 POLES SHIELDED SOCKET 2
02865 4 POLES SHIELDED SOCKET 2
02871 DB9 SHELL 7
02886 3m 16A MALE/FEMALE CABLE 1
02893 3 WA Y MALE SCREW TERMINAL 3
02894 3 WA Y FEMALE SCREW TERMINAL 3
03205 HP 5082/2800 DIODE 2
05447 ALLOY COPPER BAR DRILLED 3
05448 M6 BAR METALS 1
06648A EIA 1+5/8” DIRECTIONAL COUPLER 1
06655A UHF DTV BANDP ASS FIL TER 1
06870 90° EIA +15/8” MECHANICAL DET AIL 1
07528A 2 POLES 16A CURRENT DEVICES 1
07549 4x63A CURRENT DEVICES 1
07550A 1P+N 500V FUSE-HOLDER 1
07553 220V GREEN LIGHT 1
07558B TIMER MODULAR FINDER 1
07574 63A CONT ACTOR 1
07620 HIGH GRID 2
07625 EBM BLOWER 2
07625A 3uF CAP ACITOR 2
07810 AC FILTER 1
07970 PVC PROTECTION 2
08504 RG58 50Ω CABLE 14.00
A9029 7.5kW UHF MUL TICOUPLER 1
APG012C AMPLIFIER CONTROL 1
APG050F 230V AC THREE-PHASE POWER CONTROL 1
APT144CM AUTV/1500LD LMOS UHF TV AMPLIFIER 4
C0205 MULTIPOLE CABLE 7.00
C0798 MERLIN PLASTIC T AP 2
CMS6006 1m 1/2” CABLE WITH 7/16” MALE CONNECTOR 4
CMS6009 1.5m 1/2” CABLE WITH 7/16” MALE CONNECTOR 3
CSS5011 N MALE-N MALE CONNECTOR FOR RG58 CABLE 5
DET1069 DET1069R0 BLOCK FOR CONT AINERS WITH WHEELS 11
DET1126 DET1126R0 EIA 1+5/8” RIGID LINE SUPPORT 2
DET1183 DET1183R3 BAR SUPPOR T GUIDE 12
DET1184 DET1184R4 ANGOLAR SUPPORT EQUIPMENT 8

20

DET1201 DET1201R1 ANGOLAR SUPPORT BOX 8
DET1204 DET1204R0 GUIDE SUPPORT 2
DET1205 DET1205R0 GUIDE SUPPOR T AMPLIFIER CONTROL 2
DET1283 DET1283R0 BAR SUPPORT BANDP ASS FIL TER 2
DET1287R2P DET1287R2 DISTRIBUTOR NETWORK COVERAGE 1
DET1288 DET1288R0 SPECIAL SPREADING GUIDE EXCITER 2
DET1294 DET1294R1 GUIDE DIN DISTRIBUTION NETWORK 1
DET1334R0P DET1334R0 FIXING ANGOLAR AC FILTER NETWORK 1
DET1336R0P DET1336R0 FIXING PLA TE FIL TER NETWORK 1
DET1343R2P DET1343R2 ANGOLAR SUPPORT EQUIPMENT 4
DET1350R0P DET1350R0 DIN GUIDE SUPPORT POWER CONTROL 1
DET1351R0P DET1351R0 SUPPORT NETWORK COVER. DISTRIB. 2
DET1362R2Z DET1362R2 SUPPORT DIRECTIONAL COUPLER 1
DET1367R0P DET1367R0 ANGOLAR SUPPORT EQUIPMENT 2
DET1416R0P DET1416R0 SUPPORT FAN CAP ACIT OR 1
DET1528R0P DET1528R0 BAR SUPPORT OUTPUT COUPLER 2
DET1529R0P DET1529R0 FIXING DEIAL OUTPUT COUPLER 2
DET1646R0P DET1646R0 CONVEYER 2
FUS04 4A 500V FUSE 2
MTG0143AR0 0.7+0.7+1.4kW UHF DUMMY LOAD 1
MTG0149AR0 4 W AY UHF INPUT DIVIDER 1
P AN0080 PAN0080R0 1U FRONT P ANEL 3
P AN0082 PAN0082R0 3U FRONT P ANEL 1
SCH0268AR0 FAN CABLE BOARD 1
R0032 PLASTIC BOX FOR DOCUMENTS 1
RAK0006U42 42U OMP RACK 1
V0769 BLACK PLASTIC T AP 1
V0929 TETRAPOLAR TERMINAL 1
V0973 5 POLES AC SOCKET COVER 1
V0974 AC SOCKET COVER 1
V0975 CABLE HEAD 1
V0976 FEMALE CONT ACT 5
V0989 4 WAY AC MULTISOCKET 1

21

2 x AXIAL FANS EBM

A2E 250-AM06-13

1 = CONTROL
2 = N
3 = T
4 = S
5 = R

FANS POWER 1

MAINS INPUT

DRIVER POWER

APG050F

POWER CONTROL

APG012C

AMPLIFIER

CONTROL

MULTIPLE

SOCKET

5
4

3

5
4

3

5
4

3

2

1

21

2

1

MAINS INPUT

MAINS INPUT

MAIN

AUX

MAINS INPUT

1 = NC
2-5 = L
4-3 = L

1 = NC
2-5 = L
4-3 = L

1 = NC
2-5 = L
4-3 = L

= G

= G

= G

APD043A
EXCITER

EXCITER

(Optional)

ATS

(Optional)

APT144CM

AUTV/1500LD

APT144CM

AUTV/1500LD

APT144CM

AUTV/1500LD

GROUND BAR

= G

2

5

1 = NC

GND T S R

4

1

3

2-5 = L
4-3 = L

APT144CM

AUTV/1500LD

22

246

3 4

1

8

7

53

2

1

GND N TSR

A2

A1

5

6 8

7

1

MAINS FILTER

2
3
4
5
6
7
8

FN 256-64-52

4P 63A/6000MAIN BREAKER

4P 63A/COIL 230VCONTACTOR

4A 500V 28x10mmFUSE

FINDER 81.01TIMER

2P 16A/6000MAIN BREAKER

110/230V GREENLIGHT

2X10A+GSOCKET

470-860MHz

4 WAY HYBRID SPLITTER

RF OUT

RF OUT RF IN RF OUT RF OUT

L3

L2

L1

A1

A2

A3

A4

L3

L1 L2

RF INPUT CONNECTIONS

RF OUTPUT CONNECTIONS

DUMMY LOAD CONNECTIONS

INTERCONNECTIONS CABLE

23

A2

A3

A4

A1

RF MONITOR CONNECTION

24

RS485 AMPLIFIER CONNECTIONS

FWD AND REF CONNECTIONS

AGC CONNECTION

REMOTE CONTROL CONNECTIONS

25