Hitachi EC701HP User manual

700W UHF 8VSB-ATSC Transmitter
EC701HP
Operation Manual
Rodovia BR 459 - KM 121, 121A - Córrego Raso - 37540-000 - Santa Rita do Sapucaí - MG - Brasil
Tel: [phone] - Fax: [phone] | [e-mail] - www.hitachi-linear.com.br

W A R N I N G
All rights reserved. No part of this manual may be reproduced or transmitted in any
form, by any means (electronic, photocopying, recording or otherwise) without the prior
permission of the publisher, except where permitted by law.

HitachiKokusai LinearEquipamentosEletrônicosS/A
TECHNICAL ASSISTANCE
WARRANTY
In our Quality Management System, since several devices are received without proper identification and explanations; we
are now working with previous approval for maintenance devolution.
Therefore, in case of maintenance please contact:
Hitachi KokusaiLinear Equipamentos Eletrônicos S/A
Phone: [phone] / Fax: [phone] E-mail: [e-mail]
And inform: Client Name, Equipment Part Number, Serial Number and a brief explanation of the occurrence.
With this intel we shall send the ARM number (Authorization for Return of Material), which is mandatory to appear in the
invoice.
1. All equipment shall have warranty coverage of the supplier against manufacturing or assembly faults conducted by the
supplier, for the period of 12 months, counting from the issuing of the sales invoice. The period is irrevocable except in cases
of extended warranty previously noted in contract.
2. During warranty time, the supplier will repair, with no additional charge, the faulty products, providing adjustments, replacing
or re-manufacturing, of all the equipment or its modules and components that present unusual behavior;
2.1. The repaired/replaced products are covered for an additionalperiod of 3 (three) months or up to the end of the original
warranty time, taking into count the longer period;
2.2. If the additional 3 (three) months term, referred above, is higher than the original warranty term, the warranty will only
extend to the repaired/replaced modules or components;
2.3. The warranty will become effective in the supplier’s factory, therefore it’s not a responsibility of the supplier: the
shipment of any modules, components or any other equipment or accessory. These expenses will be, when due, a
responsibility of the Purchaser.
2.4. The Purchaser may choose a visit of the supplier’s technical personnel , instead of submitting the goods for factory
repair, although the expenses relative to transportation, lodge and nourishment of the supplier’s technicians will occur at
sole expense of the Purchaser, upon budget approval.
3. The supplier is relieved of the warranty terms in the here in after situations:
3.1. Faults or defects caused by AC Mains variation, atmospheric phenomena or accidental;
3.2. Faults or defects caused by inadequate installation of the goods, not complying with the OPERATING MANUAL(S)
or caused by negligence of the minimum infrastructure requirements in the installation site, which is referred in the ANNEX
1 herein attached.
3.3. Faults or defects caused by inadequate usage of the products, not complying with the OPERATING MANUAL(S) or
by lack of proper preventive maintenance recommended in the product’s manual.
3.4. In event of the goods and its accessories are submitted to 3rd Party maintenance, unauthorized by the supplier, as
well as removal or violation of its serial number.
4. The supplier shall employ, during warranty term, original parts and components listed by the product’s manufacturer.
5. The technical assistance must be held by the SUPPLIER or its accredited personnel or companies, failing which will result
in warranty voidance.

HitachiKokusai LinearEquipamentosEletrônicosS/A
MANDATORYCONDITIONS FOR
TRANSMITTER INSTALATION, FOR
VALIDATING THE WARRANTY TERMS
1. Propergrounding;
2. Properlightning-rod;
3. Shelter with ventilation, foot-print, and
temperature in compliance with the transmitter’s
standards.
4. Voltage regulator in compliance with transmitter’s
consumption.
Noncompliance with any of above-mentioned terms
will automatically result in the suspension of the
warranty terms.
WARNING

HIGH POWER E-COMPACT TV TRANSMITTERS: from 0 to 25
MEDIUM POWER E-COMPACT TV TRANSMITTERS: from 0 to 30
ºC
LOW POWER E-COMPACT TV TRANSMITTERS: from 0 to 35
HIGH POWER AND MEDIUM POWER E-COMPACT TV TRANSMITTERS: from0 to 80%
LOW POWER E-COMPACT TV TRANSMITTERS: from 0 to 90%
HitachiKokusai LinearEquipamentosEletrônicosS/A
Current Gauge
(mm2) Current Gauge (mm2) Current Gauge (mm2) Current Gauge (mm2) Current Gauge (mm2) Current Gauge (mm2)
M220 P+N+G 1 phase with neutral : 220Vac between phase and neutral 13 1.5 25 6 38 10 50 16 75 35 100 50
B220 2P+G 2 phases, without neutral: 220Vac between phases 13 1.5 25 6 38 10 50 16 75 35 100 50
T220 3P+G 3 phases, without neutral:220Vac between phases 13 1.5 23 4 23 4 34 10 45 10 68 25
T380 3P+N+G 3 phases with neutral: 380Vac between phases, 220Vac
between phase and neutral 13 1.5 13 1.5 13 1.5 26 6 26 6 39 10
(*) (*) (*)
2.8 kVA 5.5kVA 8.3kVA 11kVA 16.5kVA 22kVA
EC708HPEC701HP EC702HP EC703HP EC704HP EC706HP
TOPIC
The grounding system, to which Hitachi Kokusai Linear’ TV transmitter will be attached, must be designed and implemented by trained professionals. An
improper grounding system may put at risk, not just the equipment but the life of the professionals working in the shelter. To be considered proper, the
groundingmust havea resistanceofno more than 5 .
GROUNDING
AC MAINS
It is important to have isolation between energy stations of the shelter and the TV transmitter, which is achieved with the usage of isolator transformers.
Thus is guaranteed that no AC Mains’ transient coming from the shelter will be passed on to the TV transmitter or vice-versa. Besides, Hitachi Kokusai
Linear’ TV transmitter features switching power supplies that require purely sinusoidal power input, and voltage regulators or no-breaks without isolator
transformers have no assurance of a purely sinusoidal outputs. The isolator transformer must also be exclusive to the TV transmitter and its dimensioning
must use thesame standards employedin the dimensioningof thevoltage regulator or no-break,ie, at least 30% higher thanthe TVtransmitter’s specified
consumption(in KVA).
It is important to have isolation between energy stations of the shelter and the TV transmitter, which is achieved with the usage of isolator transformers.
Thus is guaranteed that no AC Mains’ transient coming from the shelter will be passed on to the TV transmitter or vice-versa. Besides, Hitachi Kokusai
Linear’ TV transmitter features switching power supplies that require purely sinusoidal power input, and voltage regulators or no-breaks without isolator
transformers have no assurance of a purely sinusoidal outputs. The isolator transformer must also be exclusive to the TV transmitter and its dimensioning
must use thesame standards employedin the dimensioningof thevoltage regulator or no-break,ie, at least 30% higher thanthe TVtransmitter’s specified
consumption(in KVA).
STABILITYINSULATION
WIRE GAUGE
MINIMUM INFRASTRUCTURE REQUIREMENTS
The Atmospheric Discharge Protection System – ADPS is comprised by the lightning rod and its accessories. The tower and shelter must be protected
against Atmospheric Discharges, through a FRANKLIN lightning rod, dimensioned and installed by the USER, following the criteria defined by NBR 5419
(in its latest version) and including all thestation installations within theprotectionzonedefinedinthe Level I electro-geometric model ofrolling spheres.
The usage of coaxial protectors is advisable for cables which connect internal and external equipments (antennas, microwave heads, tower converters).
These shields are devices featuring gas-sparklers that short-circuit to the ground, any surges discharged in the coaxial cables. Must be within the shelter,
closetothe equipment and withits groundwire boundin the equipment’s rack ground.
LIGHTNING ROD
ADPS
TEMPERATUREHUMIDITY
The relative humidity within the shelter is a solely important factor for best performance and longer lifetime of the equipment. Hitachi Kokusai Linear’
devices must operate in dry environments; this is also achieved by proper Climate Control Systems. In accordance with transmission power, the relative
humidity must be:
Shouldnever be condensation,as water may damage internal circuitry of thetransmitter.
CLIMATE CONTROL
PROTECTORS
ANNEX I
(*) Due to the number of amplifiers not be multiple of 3, the current is not equal to the 3 phases (unbalanced system).
The current quoted in the table is more loaded phase to sizing effect of conductors and protection.
Said gauge is the minimum recommended for the transmitter in question, ifthe cable lengthis large, consider voltage drop in the cable maximum of 5%
The section ofthe neutral conductor should be the same phase.
The section ofthe ground conductor may be 10% of the phase conductors, not being less than 1mm2.
The settings onthe green background with table are the recommended settings for each transmitter model.
For best performance andlonger lifetime of theequipment, it is important that theshelter features astrict climatecontrol, through theinstallationof an air-
conditioning system. For project purposes, consider the thermal dissipationspecifiedto thetransmitter (BTU/h), thethermal dissipation of the other devices
in theshelter, the thermal charge cause by solar incidence and all other thermal charges within theshelter. Itis recommended that theinternal pressure of
the shelter is slightly positive, avoidingtheentranceofoutsidecontaminants. According to thetransmission power, theinternal temperature oftheshelter
should be:
In the event of damage caused by inefficient or improper Climate Control Systems within the shelter, will automatically result in the suspension of the
warranty terms.
•
•
•
•
•
ºC
ºC

Top view ............................................... 3-10
External Connections ............................ 3-26
Photo - EC701HP Tansmitter ......................... 1-21
1
Indice
Section 1 - Introduction
1.1 Purposeof thisManual................................................ 1-1
1.2 Basic Knowledge Required ........................................ 1-1
1.3 Structure.......................................................................... 1-1
1.4 GeneralDescription .................................................... 1-2
1.4.1 Transmitter’s Control System ........................ 1-3
1.4.2 E-Compact ATSC Transmitters Models ....... 1-6
1.4.3 Composition...................................................... 1-6
1.4.4 Block Diagram of the System ......................... 1-7
1.4.5 Functional Description of the System ........... 1-8
1.4.5.1 ATSC Digital Exciter ............................. 1-8
1.4.5.2 Coaxial Relay (Optional Dual Excitation)
............................................................................... 1-14
1.4.5.3 Power Splitter....................................... 1-14
1.4.5.4 UHF Power Amplification System .... 1-14
1.4.5.5 Power Combiner................................. 1-17
1.4.5.6 LoadsBank .......................................... 1-17
1.4.5.7 Filtering System ................................... 1-18
1.4.5.8 RF Sampling Probe ............................ 1-18
1.4.5.9 Power Supplies................................... 1-18
1.4.5.10 Electrical Distribution Drawer (MCCB)
.............................................................................. 1-19
1.4.5.11 Cooling System ................................. 1-19
1.5 Technical Specification - E-Compact TV ATSC
Transmitters...................................................... 1-20
1.6
Section 4 - Initial Activation
4.1 Introduction.......................................................... 4-1
4.2 Connections and Final Checks ....................... 4-9
4.3 Possible operations with the Transmitter in
Operation............................................................. 4-9
4.3.1 Communication....................................... 4-9
4.3.2 Serial terminal Emulators ..................... 4-10
4.3.3 Forbidden operations ............................ 4-10
4.3.4 Safeguards.............................................. 4-10
4.4 Automatic Power reduction Table .................... 4-11
Section 2 - Minimum Installation
Requirements
2.1 Introduction..................................................................... 2-1
2.2 Minimum Requirements .............................................. 2-1
2.2.1 Electric Power.................................................... 2-1
2.2.1.1 Grounding ........................................................ 2-1
2.2.1.2 Stability.............................................................. 2-1
2.2.1.3 Insulation ......................................................... 2-2
2.2.1.4 WireGage........................................................ 2-4
2.3 Atmospheric Discharge Protection System ............. 2-4
2.3.1 LightningArresters............................................. 2-4
2.3.2 CableProtectors ................................................ 2-4
2.4 AirConditioning .............................................................. 2-5
2.4.1 Temperature....................................................... 2-5
2.4.2 Humidity.............................................................. 2-5
2.4.3 Cooling............................................................... 2-5
3.7.2.2Internal Connections ............................. 3-21
Connections............................................3-21
Assembly Instructions ........................... 3-19
On Site Physical Assembly ............................... 3-19
AC Power Cable Connections .......... 3-18
Power Feeding Options ........................ 3-18
Power Network Connections ........................... 3-18
TopPanel................................................ 3-173.5.3
Section 3 - Installation
3.1 Introduction...........................................................3-1
3.2 Inspection .............................................................3-1
3.3 Installation Recommendations ....................... 3-1
3.3.1 Preventive Protection ............................ 3-1
3.3.2 Tower....................................................... 3-2
3.3.3 Fastening of cables, antennas and
connectors.............................................. 3-2
3.3.4 Equipment Installation Indoors ........... 3-4
3.3.5 Equipment Grounding .......................... 3-4
3.3.6 Electric Installation Grounding ............ 3-5
3.3.7 PowerSupply.......................................... 3-5
3.4 MechanicalDrawings.......................................... 3-6
3.4.1 FrontView................................................ 3-6
3.4.2 Rear View................................................. 3-7
3.4.3 Isometric view ......................................... 3-8
3.4.4 Dimensions (mm) .................................. 3-9
3.4.5
3.5 FrontPanel.......................................................... 3-11
3.5.1 DigitalExciter.......................................... 3-11
3.5.2 PowerDrawer ........................................ 3-14
3.6
3.6.1
3.6.2
3.7
3.7.1
3.7.2
3.7.2.1

Transistor BiasAdjustment........................ 5-27
2
Section 5 - System Operation Manual
5.1 Introduction ................................................................ 5-1
5.1.1 FrontPanel.................................................... 5-1
5.2 Digital Exciter - The Master Control Unit .............. 5-1
5.2.1 Keypad ........................................................... 5-2
5.2.2 Display........................................................... 5-2
5.2.3 Signaling ....................................................... 5-2
5.3 Flowcharts Screens.................................................. 5-3
5.3.1 Presentation and Main Options ................. 5-3
5.3.2 Setup Menu ................................................... 5-4
5.3.3 Measurements ............................................ 5-8
5.3.4 SystemAlarms / Log .................................... 5-10
5.3.5 RemoteAccess............................................ 5-11
5.3.6 Options........................................................... 5-12
5.4 Startup ....................................................................... 5-13
5.5 SetupMenu............................................................... 5-13
5.5.1 PowerSetup ................................................. 5-15
5.5.2 TransmitterSetup....................................... 5-15
5.5.3 Image Frenquency Suppression ............... 5-16
5.5.4 LO Adjustment (LO Leakage Suppression)
.......................................................................... 5-18
5.5.5 Active / De-active Pre-Correction ............... 5-18
5.5.6 ModulationSettings..................................... 5-20
5.5.7 Time and date configuration ...................... 5-21
5.5.8 Password...................................................... 5-21
5.5.9 TransportStream Input ................................ 5-22
5.5.10 AlarmsMask.................................................. 5-23
5.5.11 USBSetup..................................................... 5-23
5.5.12 USB HostAccess Setup ............................. 5-24
5.5.13 CrestFactorReduction............................... 5-24
5.5.14 Clock Reference.......................................... 5-25
5.5.15 Restore Web Password to Default............ 5-27
5.5.16
5.5.17 PATemperatureControl.............................. 5-29
5.6 MeasurementsMenu.............................................. 5-30
5.6.1 Power............................................................ 5-32
5.6.2 TransportStream......................................... 5-32
5.6.3 RF Power Drawer Measurements ............ 5-33
5.6.4 ExciterPower Supply................................... 5-36
5.6.5 Communication among RF drawers ........ 5-36
5.6.6 Software/HardwareVersion ....................... 5-37
5.6.7 Automatic LevelControl.............................. 5-38
5.6.8 ClockMeasurements.................................. 5-39
5.6.9 PowerSupplyVoltages............................... 5-40
5.7 AlarmSystem............................................................ 5-40
5.7.1 CurrentAlarms.............................................. 5-40
5.7.2 AlarmLog ...................................................... 5-41
5.7.3 DrawersAlarms ........................................... 5-42
5.7.4 ClearPastAlarms........................................ 5-43
5.8 Remote Management System (Telesupervision) 5-47
5.8.1 IPConfiguration ........................................... 5-47
5.8.2 MaskConfiguration ..................................... 5-48
5.8.3 GatewayConfiguration ............................... 5-48
5.8.4 Host Address Configuration ...................... 5-48
5.9 Options ...................................................................... 5-50
Section 6 -
Preventive / Corrective Maintenance
6.1 Introduction................................................................. 6-1
6.2 Preventive Maintenance.......................................... 6-1
6.2.1 Quiescent currents Automatic adjustment
procedure.................................................................. 6-5
6.3 CorrectiveMaintenance ........................................... 6-6
6.3.1 Visual identification of alarms (leds) ....... 6-6
6.3.2 Measurements readings ........................... 6-6
6.3.3 Power DrawerAir Filter ............................... 6-7
6.3.4 Power Drawer Fan Replacement ............. 6-9

This manual is divided into six (6) sections, which provide the following information:
Manual Rev. 0.1 - February 2018 1-1
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Section 1
Introduction 1
1.1 Purpose of this Manual
The purpose of this manual is to provide the technical information required for the installation
and operation of transmitters in UHF TV signals (digitalATSC) in the E-Compact series.
HitachiKokusaiLinearElectronicEquipmentS/Arecommendsthatyou carefullyreadthesections
of thismanual before installing oroperating this equipment.
1.2 Basic Knowledge Required
Follow the necessary knowledge and skills to operate the equipment under:
• Knowledge of electronic circuits of Radio Frequency;
• Knowledge of electricity and electrical systems;
• Knowledge of digital electronics;
• Conducting tests and Digital TV signals measures inATSC standard;
• Knowledge of radiant systems;
• Conducting tests and measures of Radio Frequency;
• Practice in the management of radio frequency measures equipment(spectrumAnalyzer, RF
power meter, Vector NetworkAnalyzer, couplers, attenuators, etc).
1.3 Structure
Section 1 - Introduction
Thissectionprovidesgeneraloverview,models,functionaldescriptionandtechnicalspecifications
for all models of transmitters ATSC of the E-Compact series.
Section 2 - Installation Requirements
This section describes the criteria of the minimum requirements of the infrastructure for the
equipmentinstallation,suchas:electricalpowersystem,lightningprotection andairconditioning.
Section 3 - Installation
This section provides the procedures for physical and electrical wiring of the TV transmitter.

Provides informationfor preventive / corrective maintenance.
Preventive / Corrective Maintenance
1-2
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
This section contains a general description of the ATSC TV transmitters of the E-Compact
series. Included in thissection are thefunctional description of powerdrawersanddigital exciter,
block diagrams and technical specifications of the system.
1.4 General Description
Figure1-1 Front ViewATSCTransmitters
Section 4 - Initial Activation
This section describes which steps to be performed in the initial activation of the equipment.
Section 5 – Operation of the Control System
Information of navigation and Operation using the front keypad as well as identifications and
functions of all controls and indicators of the outer panel.
Section 6 –
Manual Rev. 0.1 - February 2018
EC701HP
EC704HP
EC703HP
EC702HP
EC708HP
EC706HP EC712HP
Image for illustrative purpose
8RU 25RU 40RU 2x 40RU

1-3
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
HP transmitters Family (High Power) has high efficiency and high power density.
The high´spower line consists of refrigerated air transmitters with output powers of 700W up to
8.5kW (after filter) toATSC standard.
The intelligent digitalmanagement system using microcontrollers,allows controland monitoring
in real time of all transmitter functions. All operation is performed through keypad and digital
display both located on the front panel, through which we have access to all readings, alarms
and settings.
The RF amplification system is comprises by a splitter, power drawers in parallel, each with its
own power supply and independent supervision and isolated combiner.
1.4.1 Transmitter’s Control System
Control Architecture for Hitachi Kokusai Linear’ Transmitters:
Hitachi Kokusai Linear’stransmitter controlsystemallowscontrol and monitoring,through front
display, all parameters of the equipment.
Thissystemiscomprised bya controlunit(exciter’s integrated function)whichthrougha RS485/
MODBUS network, gather and sends information to the power drawers.
Main Features:
Management of all equipment functions and power drawers across the front display.
High Efficiency providing low power consumption.
Doherty amplifiertechnology with LDMOS High Voltage transistors
Compact Design.
Amplifierwithquickcouplingconnection(HotSwap),facilitatinginstallationandmaintenance.
Digital automatic Pre-correction automatic (linear and nonlinear)
Control of the transmitter integrated to the exciter.
Userinterface through display allows monitoring and configurationof the equipment.
Software for measuring measures the main parameters of the transmitter without the need
for expensive equipment and specific.
WEB and SNMP interface for remote management.
Option of automaticredundancy inexcitation (optional).
GPS receiver for internal time base (optional)
Power supplies with power factor correction.
Power protection reflected with gradual reduction of the direct power control (foldback).
Start with Inrush.
Combiners and isolated splitters, allowing removal and insertion of drawers with the
connected equipment (provided that the draweris turned off).
Manual Rev. 0.1 - February 2018

1-4
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Below the table of power drawers of addresses and exciters on MODBUS.
Table 1-1Addresses of power drawers and Exciters - MODBUS
MODEL MODULE ADDRESS MODBUS (decimal) Pinout configuration (MSB) A2A1A0(LSB)
(binary)
EC701HP PA Drawer#1 003 000
PA Drawer#1 003 000
PA Drawer#2 004 001
PA Drawer #1 003 000
PA Drawer #2 004 001
PA Drawer #3 005 010
PA Drawer #1 003 000
PA Drawer #2 004 001
PA Drawer #3 005 010
PA Drawer #4 006 011
PA Drawer #1 003 000
PA Drawer #2 004 001
PA Drawer #3 005 010
PA Drawer #4 006 011
PA Drawer #5 007 100
PA Drawer #6 008 101
PA Drawer #1 003 000
PA Drawer #2 004 001
PA Drawer #3 005 010
PA Drawer #4 006 011
PA Drawer #5 007 100
PA Drawer #6 008 101
PA Drawer #7 009 110
PA Drawer #8 010 111
ExciterA 100 -
ExciterB 101 -
1+1Control
Unit 234 -
Comum
EC704HP
EC706HP
EC708HP
EC702HP
EC703HP
Manual Rev. 0.1 - February 2018

1-5
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
TheArchitecture of Control for Hitachi Kokusai Linear Transmitters is composed of subcontrol
blocks characterized by Control / Exciter Drawers and by Power Drawer. This architecture
allows the distribution of control functions.
The main control block represents the Control / Exciter Drawer and the sub-control blocks
represent the Power Drawers and Telesupervision Drawer (Remote Control Drawer).
Each sub-block only reports monitoring information to the main control block, and in some
situations the main control block can also transmit commands to the sub-blocks.
The Information reported to the controlblock is displayed on the primary display.
The control center of each block and sub-block consists of a microcontroller module of 16-bit
and 32-bit, according to its functionalitydescribed below:
a)- Main Control Module:
Themaincontrolmodulereceivesinformationfromtheothermodules,processesthisinformation
for displaying on the LCD and sends it to the system telesupervision. The main module is also
responsibleforchecking abnormalconditionsandgeneratealarms,controlof transmitted power
levels and general user interface. The main control module can also send commands to the
sub-blocks in situations where it is necessary to enable specific protections for sub-blocks and
also for the control of information sent and received by the remote supervision system.
b)- Power Drawer’s Control Module
Thecontrolmodulesendsinformationtothemainmoduleonrequest.Thismodulehasaprotection
system fully independent of the main control module. The control module is responsible for
monitoring the power supplies, the readings of forward and reflected power, cooling system,
control of quiescent current according to temperature variation.
Alphanumeric User Interface
The Control/Exciter drawer has a LCD display in it’s front panel companied by a keyboard with
six keys,which are: ENTER, ESC, LEFT, RIGHT, UP, DOWN.There is also close to these keys
a set of indicative LEDs for Control/Exciter drawer alarms.
Communication between blocks and sub-blocks
The Control / Exciter Drawer uses a communication system called MODBUS. This is a serial
communication network operated by the Main Control Module in which each node (sub-block)
has its own address. This communication system works with the differential transmission
avoiding interferencenoise.
Manual Rev. 0.1 - February 2018

1-6
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
1.4.2 E-Compact ATSC Transmitters Models
The E-Compact TV series consists of transmitters that have a rated power of 700Wrms to
8,500Wrms (digital). Followingin Table 1-2, the available model are listed.
Table 1-2 E-CompactATSCTransmitterModels(HighPower)
Note: The powerlevelsare given inaverage power for criticalmask (50dB). The power
is measured at the transmitter’s output after the filter.

1.4.3 Composition
The general structure of an E-Compact transmitter series consists of the following stages:
- Exciter with frontal display
- Coaxial Relay (*1)
- Power Splitter(*2)
- Power Drawer(s)
- Power Combiner (*3)
- Reflectometer
- Filtering System
- Power System (*4)
- Ventilation System
Notas:
(*1) Used only in equipment setupdual exciters.
(*2) The splitter is on the equipmentwith more than one power drawer.
(*3) Thecombiner is present only ondeviceswith more thanone power drawer.
(*4) The components of the AC input (In-Rush, circuit breakers, etc.) of the transmitter are contained in a
drawercalledMCCB(except EC701HPmodel).
MCCB: MouldedCase Circuit Breaker.
TRANSMITTER
MODEL NUMBEROF POWER DRAWER OUTPUTRATEDPOWER (Wrms)
EC701HP 1 700
EC702HP 2 1400
EC703HP 3 2100
EC704HP 4 2900
EC706HP 6 4200
EC708HP 8 5600
EC712HP 12 8500
Manual Rev. 0.1 - February 2018

700Wrms
Block Diagram of theTransmitter model EC701HP
Figure 1-2 contains the block diagram of the 700W transmitter, EC701HP model.
1-7
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
1.4.4 Block Diagram of the System
Figure 1-2
Manual Rev. 0.1 - February 2018
Connector
RS485
ON/OFF
Manual
Status
RF OUT
750W
PA
Breaker
RFIN
RF Conector
DIN
220 Vac
RF EXCITER
RF After Filter
RFBeforeFilter
EC701HP –RF SYSTEM BLOCK DIAGRAM
10MHz OUT
ASI IN 2
ASI OUT 2
1PPSIN
1PPSOUT 10MHzIN
ASI IN 1
ASI OUT 1
TUNERIN
GPSANTENA
USB
Ethernet*
GV 40087
Meas.
Slow
Fuse
220V
Tomada AC
RF OUT
N
sma
Fans
MOD GV 4992
AC OUTLET
RF
Connector
DIN
Low Pass
Filter
MASK
FILTER
RF Out
1 5/8" EIA
After Filter RFSample
Before Filter
RFSample

1-8
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
The exciter is formed by the MOD GV 40153 module drawer more optional (internal GPS, and
1.4.5.1 ATSC Digital Exciter
1.4.5 Functional Description of the System
other software optional). This equipment is responsible for generating the digital TV signal and
can perform, among otherfunctions, for controlling the output power and the pre-correction of
distortions caused by filtering and amplification stages of a transmitter.
Has the following main modules:
1. AC-DC Converter (MOD 4779 FTE 1RU +28V/80W);
2. Ethernet/USB-Host/Device interfaceboard (MOD CIM3744 DIGIand USB);
3. Keyboard (MOD CIM3717 TECLADO 1U);
4. Display (MOD CIM 30165 LCD 2x40);
5. MODVENP40X4024V1U;
6. DC-DC Converter (MOD CIM30143 PWR 8001 V4);
7. OutputAmplifier (MOD4803 PA100mW 4001);
8. MOD 4854 EXC DIGI8001 V4 (MOD 4854);
9. CIM3832 GPS 8001 (Optional);
10. MOD VENP RADIAL 24V 1U.
The Digital Exciter is responsible for providing an RF signal to excite the amplification stage of
theequipment.
The exciter input is a BNC connector that may receive either an ASI or SMPTE310M transport
stream. The modulation process follows ATSC A/53E recommendation, and is a complex
modulation process generating identical phase-modulated orthogonal IF carriers, (I) and (Q) at
frequencyof 18.833916MHz.
10
4
5
3
2
1
6
8
7
9
Figure 1-3 - Internal View
Manual Rev. 0.1 - February 2018

1-9
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Both(I)and (Q) modulated carriersare routed intotheIF/UHF up-converter.The localoscillatoris
a synthesized time-based PLL via an internal VOCXO (Voltage / Temperature Oven Controlled
Crystal Oscillator). This oscillator can receive external reference one among 6 possibilities;
(External 1PPS GPS, Internal1PPS GPS, External 10MHz orInput Transport Stream).
The on-channel modulated signal is routed to the RF amplifier, a classA highly linear amplifier
with enoughhead room toaccommodatefuturesignalamplitude expansionduringthe non-linear
pre-correction process.
Theexciter outputdeliversa 100mW maxRFoutputlevel,(+20dBm)atthedesiredUHFchannel,
driving the RF power amplifiers line-up. The overall RF output power is kept over control via an
internal power control loopALC.
The power sensors for direct and reverse power are integrated also on this same PC Board;
allow the power control feature fora several different types and models of transmitters.Asample
of the of the RF signal delivery to the load is necessary to be present, so the external loop to
control the RF power is closed. (External Power Control Loop).
The Master ControlUnit (MCU) of the unit is embedded inthe exciter. The MCUinteracts with all
functionality present within the equipment. It further interfaces externally via a keypad and an
LCD display.
The MCU receives information proceeding from several modules, as the DTV modulator, Up-
Converter, RF amplifiers, RF samples and the administration of passwords. Via keypad it is
possible to read and program thepower leveldelivered bythe transmitter. Majorchangeson the
transmitter configuration are possible with factory assistance.
The Digital Exciter interacts with the HITACHIproprietary software (GUI8001) that performs the
implementation of linear and non-linear pre-correction as required; the software also conducts
measurements on the demodulated signal, such as MER and power spectrum readings,
among others.
ATTENTION: In the event of any changes being required in the settings of the
equipment, the Service Department of Hitachi Kokusai Linear should be consulted
for furtherinformation on the procedures to be adopted.
Figure 1-4
Front view- Digital Exciter
Manual Rev. 0.1 - February 2018

Figure 1-5 contains the 1st part of the block diagram of the exciter
1-10
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Block Diagram - Digital Exciter 100mW.
Voltage
Clamp
LPF
ASI 1
Equalizer
ASI 2
Equalizer
10 MHz
Zero Cross
PPS
Schmitt
Trigger
UBLOX
GPS
Sat/UHF
Tuner
MAC/PHY
USB/FIFO
Rear
Rear
USB
Rear Ethernet
ASI 1 ASI 2
10MHz
in
PPS in
GPS
ant.
Transmitter
Control.
Green
Connector
10MHz
OCXO 1:4
TS
Priority
Switch BTS
Decompressor Integrated
Multiplexer Remultiplexer SFN Reed
Solomon ISDB
Modulator Linear
Pre-correction Shape Filter
Interpolation IF Complex
Mixer Non-Linear
Pre-correction TX
Balance DAC
Interface
ADC
Interface
Nios
System Control/Config.
External Capture.
Communication.
ASI
Output
Switch
External
Capture
Memories
SRAM
External
Nios
Memories
SRAM
External
Nios
Serial
Flash
External
Shared
Serial
Flash
OCXO Control
1Hz PLL Internal
PLLs
SFN
Memories
SRAM
Delay
Adjust
Memory
SRAM
Time
Interleaving
Memory
SRAM
SYSCLK
Microcontroller
System Control/Config.
Transmitter Control/Config..
User Interface
DAC
7dB
LPF
7dB
LPF
1:2 1:2
ADC
3dB
FPGA_CLK
DAC_CLK
ADC_CLK
TEST_POINT_1
DAC_CLK ADC_CLK
ASI Output
IF I
TEST
POINT
2
IF Q
TEST
POINT
3
Feedback
SPI
Voltage
Converter
5V/3V3
IF Mute
+28V
DAC_ENABLE
DAC_ENABLE
Lock_Detect 1
Lock_Detect 1 Lock_Detect 2
10MHz out
10MHz lo 10MHz sysclk
10MHz
sysclk
ALC SPI_LO
Keyboard/Display
DIGI
FPGA
Digital Board
FPGA
Voltage
Clamp
LPF
ASI 1
Equalizer
ASI 2
Equalizer
10 MHz
Zero Cross
PPS
Schmitt
Trigger
UBLOX
GPS
MAC/PHY
USB/FIFO
Rear
Rear
USB
Rear Ethernet
ASI 1 ASI 2
10MHz
in
PPS in
GPS
ant.
Transmitter
Control.
Green
Connector
10MHz
OCXO 1:4
TS
Priority
Switch BTS
Decompressor Integrated
Multiplexer Remultiplexer SFN Reed
Solomon ISDB
Modulator Linear
Pre-correction Shape Filter
Interpolation IF Complex
Mixer Non-Linear
Pre-correction TX
Balance DAC
Interface
ADC
Interface
Nios
System Control/Config.
External Capture.
Communication.
ASI
Output
Switch
External
Capture
Memories
SRAM
External
Nios
Memories
SRAM
External
Nios
Serial
Flash
External
Shared
Serial
Flash
OCXO Control
1Hz PLL Internal
PLLs
SFN
Memories
SRAM
Delay
Adjust
Memory
SRAM
Time
Interleaving
Memory
SRAM
SYSCLK
Microcontroller
System Control/Config.
Transmitter Control/Config..
User Interface
DAC
7dB
LPF
7dB
LPF
1:2 1:2
ADC
3dB
FPGA_CLK
DAC_CLK
ADC_CLK
TEST_POINT_1
DAC_CLK ADC_CLK
ASI Output
IF I
TEST
POINT
2
IF Q
TEST
POINT
3
Feedback
SPI
Voltage
Converter
5V/3V3
IF Mute
+28V
DAC_ENABLE
DAC_ENABLE
Lock_Detect 1
Lock_Detect 1 Lock_Detect 2
10MHz out
10MHz lo 10MHz sysclk
10MHz
sysclk
ALC SPI_LO
Keyboard/Display
DIGI
FPGA
Digital Board
FPGA
Figure 1-5
1st Part - Block Diagram: Exciter
Manual Rev. 0.1 - February 2018

1-11
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Voltage
Variable
Attenuator
Voltage
Variable
Attenuator
RF
Switch
Before Filter in
After Filter in
PAD
2dB Passive
Mixer PAD
2dB
18dB
PAD
6dB
17dB
17dB
Level
Detector
1:3LPF Feedback
Test_Point_5
LPF LPF
Balance Balance
LO
Null
DAC
Active
Mixer
LO_Q
LO_I
I+
I-
Q+
Q-
RF Mute
+28V
Reflected
Local
Oscillator
2nd Harmonic
Filter
Selection
Voltage-Controlled
Variable Gain
Amplifier
VGA
2xLO
ALC
IFI
IF Q
CH out
Lock_Detect 2
10MHz lo
LO
LO
Test_Point_4
SPI_LO
SPI_LO Up-Converter
Down-Converter
Analog Board
UP-Converter
Down-Converter
Voltage
Variable
Attenuator
Voltage
Variable
Attenuator
RF
Switch
Before Filter in
After Filter in
PAD
2dB Passive
Mixer PAD
2dB
18dB
PAD
6dB
17dB
17dB
Level
Detector
1:3LPF Feedback
Test_Point_5
LPF LPF
Balance Balance
LO
Null
DAC
Active
Mixer
LO_Q
LO_I
I+
I-
Q+
Q-
RF Mute
+28V
Reflected
Local
Oscillator
2nd Harmonic
Filter
Selection
Voltage-Controlled
Variable Gain
Amplifier
VGA
2xLO
ALC
IFI
IF Q
CH out
Lock_Detect 2
10MHz lo
LO
LO
Test_Point_4
SPI_LO
SPI_LO Up-Converter
Down-Converter
Analog Board
UP-Converter
Down-Converter
Figure 1-6
2nd Part - Block Diagram: Exciter
Manual Rev. 0.1 - February 2018

1-12
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Description of main circuits:
Equalizer input circuit ASI 1 e 2
Equalize and convert DVB-ASI signal intoa differential LVDSsignalto the FPGA.
Circuit Cable Driver of the outputs ASI 1 e 2
Converts the LVDS signal provided by the FPGAto DVB-ASI electrical standard. The twoASI
outputs have the same content.
GPS Ublox (Optional)
GPS receiver module with input for active antenna (amplified) supplied with +5 V (via coaxial
cable) and output PPS (Pulse Per Second) with LVTTLlevels.
PPS Input and Output
Uses components schmitt trigger as interface, has high input impedance (> 1M) and low
output impedance (~ 35). Compatible with TTL/ LVTTLlevel input and LVTTL output.
10MHz Input and output
The inputcircuit is azerocrossing detectorwith animpedanceof 50andACcoupling.Provides
a signal of 10MHz square with LVTTLlevels for the FPGAfor input between 0 and +10 dBm.
The output with an impedance of 50provides a sinusoidal signal with +8 dBm ~ 700mV DC
level to a load 50or 4Vpp and 1.5 V average for high impedance loads (> 1M).Theoutput
signalis a sample of 10MHz fromtheOCXO, a temperature-controlled oscillator and a frequency
range of approximately + /-1.5 ppmor+ /- 15Hz.
SYSCLK – System’s Clock
The sysclkcircuitis basicallycomposedof twomain components,the first is theclockgenerator
(CIHMC830LP6)thatreceivesthereferenceof10MHzandgeneratesasignalof1377.56643358
MHz (8xSYS_CLK)through the fractional PLL and integrated VCO.
Thesecondcomponentistheclockdistributor(ICAD9510)which performsa frequency division
of 8 and 16 forgenerating the signs of 172.195804197 MHz (FPGA_CLK, and DAC_CLK and
test point SYSCLK) and 86.09790209 MHz (ADC_CLK)respectively.
This circuit is configured via SPI interface, by the microcontrollerA512 during system startup.
The Lock Detect output is used for verification of this circuit.
The frequency of the system clock for 6MHz BW is achieved through tithe 8192 * 106/63.
Digital Modulator
TheASIreception blocks, remultiplexing, modulationand corrections are describedthrough the
languages VHDLand Verilog and synthesizedusingthe Quartus IIsoftware.ASOC(Systemon
a Chip)using Nios processor isalso present for theexecutionof the functions of conFiguretion,
control and communication of the systemusing functions described inANSI Clanguage.
The FPGA basically makes the treatment of the input transport stream and modulates this
information according to theATSC standard, generating a complex digitalFI (Iand Qsignals of
16-bit signed complementing 2) with a sampling rate of 86.0979 MSPS. Also performsthe linear
and non-linear pre-correction, the capture and storage of internal signals and of feedback to
implement the tasks of pre-correction and measures.
Manual Rev. 0.1 - February 2018

1-13
Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling -ATSC - High Power
Digital-to-Analog Converter and Analog FI generation
Composed of the DAconverter, reconstruction filter (low pass with fc ~ 50MHz) and FI
amplifier.
TheDAconverteroperatesat172.0195804MSPS(interpolationfactorequalto2)andtheoutput
amplifier with gain of 7dB has a protection circuit that inhibits its operation during the transient
power supply and system startup.
TheFIsignalsIandQ(In-phaseand Quadrature)are centeredon18,834MHz(obtainedbytithe
1024 * 106/63), with an average power of -20 dBm +/- 0.5 dB and intermodulation lower than
-55 dBc at +/-3.25.
Local Oscillator
The LO circuit is essentially composed of the CI (fractional PLL + VCO) receiving the 10MHz
reference and generates a signal corresponding to twice the frequency of the local oscillator
(used by the mixer complex of the up-converter to generate the LO signal with 0° and 90°) and
alsobyCIHMC432whichisafrequencydividerby2(LOsignalformonitoringanddownconvert).
The valueof thefrequencyof the localoscillatorcanbe obtained bythefollowing equation 6MHz
BW):
LO(C) = (C-14)*6*106+ 473*106+ 1*106/7 + 1024*106/63 [Hz]
In which C is the desired channel: 14..69
Eg: C=54. LO = (54-14)*6*106+ 473*106+ 1*106/7 + 1024*106/63 = 729,396825 MHz
This circuit isconfigured via SPI interface forA512 microcontroller during system startup. Lock
Detect output is used to check this circuit.
Up-converter
The channel conversion is done by the CIADL5385, a mixer complex (FI input in quadrature)
and input 2xLO (internal generation of LO 0 ° and 90 °) where the main features are canceling
the image frequency (top rate: LO +FI)and reduced leakage of the local oscillator.
The cancellation of the image frequency isoptimizedby adjusting theFI quadrature (amplitude
and phase adjustment between Iand Q signals).
The reductionof LO leakage ismaximized byaddinga voltageoffsetinorderto compensate for
the imbalance present in the DC ports of FI.
The minimum expected frequency image rejection is -50dBc and LO leakage is -40dBc.
The converted signal in frequency, lower rate (C = LO - FI), is then submitted to the selector
circuit lowpass filter of 2nd harmonic of four bands, VHF B1 (channels 2-6), VHF B3 (channels
7-13),UHFLow(14-42)and UHF High (43-69), automaticallyselected according to the channel
by the microcontrollerA512.
ThenextstepistheVoltage-ControlledVariable GainAmplifier (CIADL5330)whichappliesagain
proportional totheALCvoltage(Gmin ~= -34 dB toALC = 0V e Gmáx ~= +22 dB toALC = 1,4V)
applied to the pin 24 of the VGA (after resistive divider). The typical maximumoutput power is
0dBmforanintermodulationsmallerthan-50dBcat+/-3.25MHz fromthe centerof the channel.
Down-converter
The circuit“down-converter”performs the selection of one of the two feedback signals (Before
andAfter Filter or Before andAfterFilter), performs the beating of this signalwith1xLOusing a
real passive mixer and gets a FIsignal centered at 18.834 MHz.
Manual Rev. 0.1 - February 2018