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Hitachi EC701HP, Operation Manual

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Hitachi EC701HP Operation Manual Download Page 81

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5-5

Section 5 - System Operation Manual
(E-Compact ATSC Transmitters - EC701HP thru EC708HP)

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Manual Rev. 0.1 - February 2018

Summary of Contents for EC701HP

Page 1: ...VSB ATSC Transmitter EC701HP Operation Manual Rodovia BR 459 KM 121 121A Córrego Raso 37540 000 Santa Rita do Sapucaí MG Brasil Tel 5535 3473 3473 Fax 5535 3473 3474 linear linear com br www hitachi linear com br ...

Page 2: ...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 ...

Page 3: ...e 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 pe...

Page 4: ...RMS 1 Propergrounding 2 Proper lightning 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 ...

Page 5: ...the dimensioning of the voltage regulator or no break ie at least 30 higher than the TV transmitter s specified consumption in KVA STABILITY INSULATION 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 lightnin...

Page 6: ...den 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 Cable Protectors 2 4 2 4 Ai...

Page 7: ...ference 5 25 5 5 15 Restore Web Password to Default 5 27 5 5 16 5 5 17 PATemperature Control 5 29 5 6 MeasurementsMenu 5 30 5 6 1 Power 5 32 5 6 2 Transport Stream 5 32 5 6 3 RF Power Drawer Measurements 5 33 5 6 4 Exciter Power Supply 5 36 5 6 5 Communication among RF drawers 5 36 5 6 6 Software Hardware Version 5 37 5 6 7 Automatic Level Control 5 38 5 6 8 Clock Measurements 5 39 5 6 9 Power Sup...

Page 8: ...s of Radio Frequency Knowledge of electricity and electrical systems Knowledge of digital electronics Conducting tests and Digital TV signals measures in ATSC 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 Struc...

Page 9: ... diagrams and technical specifications of the system 1 4 General Description Figure 1 1 Front ViewATSC Transmitters 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...

Page 10: ...ol unit exciter s integrated function which through a 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 amplifier technology with LDMOS High Voltage transistors Compact Design Amplifier with quick coupling connection Hot Swap fa...

Page 11: ...er 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 Draw...

Page 12: ...al conditions and generate alarms control of 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 The controlmodule sends informati...

Page 13: ...ies 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 setup dual exciters 2 The splitter is on the equipment with more than one power drawer 3 The combiner is present only on devices with more than one power drawer 4 The compon...

Page 14: ... 0 1 February 2018 Connector RS 485 ON OFF Manual Status RF OUT 750W PA Breaker RF IN RF Conector DIN 220 Vac RF EXCITER RF After Filter RF Before Filter EC701HP RF SYSTEM BLOCK DIAGRAM 10MHz OUT ASI IN 2 ASI OUT 2 1PPS IN 1PPS OUT 10MHz IN ASI IN 1 ASI OUT 1 TUNER IN GPS ANTENA 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 Fi...

Page 15: ...SB Host Device interface board MOD CIM 3744 DIGI and USB 3 Keyboard MOD CIM3717 TECLADO 1U 4 Display MOD CIM 30165 LCD 2x40 5 MOD VENP 40X40 24V 1U 6 DC DC Converter MOD CIM 30143 PWR 8001 V4 7 Output Amplifier MOD 4803 PA 100mW 4001 8 MOD 4854 EXC DIGI 8001 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...

Page 16: ...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 Control Unit MCU of the unit is embedded in the exciter The MCU interacts with all functionality present within the equipment It further interfaces externally via a keypad and an LCD display The MCU receives information procee...

Page 17: ...e 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 ...

Page 18: ... 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 Sw itch Before Filter in After Filter in PAD 2dB Passive Mixer PAD 2dB 18dB PAD 6dB 17dB 17dB Level Detector 1 3 LPF 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 ...

Page 19: ...d of two main components the first is the clock generator CI HMC830LP6 that receives the reference of 10MHz and generates a signal of 1377 56643358 MHz 8xSYS_CLK through the fractional PLL and integrated VCO The second component is the clock distributor ICAD9510 which performs a frequency division of 8 and 16 for generating the signs of 172 195804197 MHz FPGA_CLK and DAC_CLK and test point SYSCLK ...

Page 20: ... is used to check this circuit Up converter The channel conversion is done by the CI ADL5385 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 is optimized by adjusting the FI quadrature amplitude and pha...

Page 21: ...ansmitting The exciter which is not selected will remain powered in standby ready to take control of the equipment 1 4 5 3 Power Splitter This passive module is a UHF power splitter in quadrature which is responsible for the clustering of power drawers in parallel configuration Receives the signal from the exciter and promotes a division 1 N 5 to excite the UHF amplifiers in the drawer power Figur...

Page 22: ...ing on the temperature Automatic control of rotation of the fan depending on the temperature of the power transistors Protection against VSWR and Overdrive Power Factor Corrector PFC at power supply PFC Protection against over current in the power supply Settings and measures via terminal Automatic restart after alarm event Matched sample of the output signal Figure 1 8 Block diagram of the power ...

Page 23: ...Frequency Range 470 782 MHz divided into 14 subbands Output Power 860W rms Power Gain Ajusted 52dB Gain adjustment range 6 dB Phase adjustment range 30 Automatic Fan Speed rpm Control 2100 to 7000 rpm RF Output connector 7 8 without flange Intermodulation shoulder Better than 36dBc Harmonic Attenuation Better than 30dBc AC Power Supply 220 VAC 180 to 240VAC Efficiency 33 Power Factor 0 98 Cooling ...

Page 24: ... drawers thus obtaining the final transmitter power 1 4 5 6 Loads Bank It is a drawer where loads of unbalance of the power combiner are packed there are different models according to the number of loads There are five models of load bank of drawers 056402 MOD GV 40041 DL0K5W EC702HP 056395 MOD GV 40040 DL1K0W EC703HP 055356 MOD GV 40027 DL1K9W EC704HP 059323 MOD GV 40082 DL4K3W EC706HP 056402 MOD...

Page 25: ...power supplies are controlled by the digital control units via the shutdown command Also report each in its respective control unit the DC voltage supplied and the consumption required by UHF amplifiers transistors In the transmitter three models of power supplies are used Module 4779 Exciter power supply Module 40008 Power Drawer s Power Supply MOD GV 40001 MOD GV 40087 Module 40039 AC Unit 1 4 5...

Page 26: ... has the following characteristics Inrush current limitation of equipment inrush Equipment protection in the event of over voltage or phase failure in the AC network Provides 50V for the load bank drawer Provides 8V for the reflectometer Provides 15V for the relay 1 4 5 10 Electrical Distribution Drawer MCCB Figure 1 12 MCCB NOTA The MOD GV MCCB drawer has different power capacities according to t...

Page 27: ...r of 580W in which the minimum power is 50W 8 May change depending on MER value channel and output power For details consult Hitachi Kokusai Linear 9 B F Before Filter A F After Filter 10 Under consultation Model EC701HP EC702HP EC703HP EC704HP EC706HP EC708HP 8 Output Power W ATSC DVB T2 ISDB T 750 700 800 1 500 1 400 1 600 2 200 2 100 2 400 3 000 2 700 3 200 4 500 4 000 4 800 6 000 5 400 6 500 A...

Page 28: ...Photo EC701HP Transmitter Front view of the EC701HP 1 21 Section 1 Introduction UHF Digital TV Transmitters E Compact Air Cooling ATSC High Power 1 6 Figure 1 13 Manual Rev 0 1 February 2018 ...

Page 29: ...rear bottom connection poles Three phase transmitters Neutral Rear bottom connection 380 VAC three phase transmitters AC Connectors Rear panel of RF PAs Individual RF Drawer Cabinet AC Grounding cables Rear Panel of PAs Individual Exciter Cabinet AC Grounding cable Rear Panel of Exciter No Breaks voltage stabilizers ASI IN Transport Stream IN Exciter to the top the cabinet RF SAMPLE Before Filter ...

Page 30: ...l in order to lower the impedance a temporary condition would be created as it would not be the natural local chemistry which will be naturally absorbed over time In this case periodic preventive checking should be made during maintenance activities The voltages delivered to each phase of the Hitachi Kokusai Linear TV transmitter must be purely sinusoidal and stabilized For this reason it is neces...

Page 31: ...adopted for the voltage stabilizers or UPS devices i e 30 above the specified TV transmitter consumption in kVA The Hitachi Kokusai Linear TV transmitter should not be installed within a radius of 10 meters from the 13kVA transformer as it could cause interferences due to the electromagnetic field or sparking in the internal brushes Recommendations 1 We recommend that the transmitter never sees th...

Page 32: ...rrection PFC powered by a UPS without PFC because all the advantage achieved by the transmitter is lost on UPS not resulting in energy savings When making this type of connection you actually had a great load resistive behavior to the UPS but its electric power sees the input of the UPS without PFC high consumption When we have a UPS with power factor correction PFC this will present a network for...

Page 33: ...ge protection system must be hot galvanized or plated with a 254 mm coat of copper The cable length from the lightning arrester up to the flowing pit cannot have any splices and the cable path must be such so as to avoid angles smaller than 90º which could create sparking points 2 3 2 Cable Protectors It is advisable to use coaxial protectors for the cables that interconnect outdoor equipment ante...

Page 34: ...environment which can be ensured by means of a suitable air conditioning system Depending on the transmission power the shelter s relative humidity should be as follows If a Hitachi Kokusai Linear equipment is damaged due to the lack or inefficiency of the air conditioning system it shall NOT be covered by the guarantee Should never be condensation as water may damage internal circuitry of the tra...

Page 35: ...ted by this guide and to protect your warranty The installation should take approximately 1 hour for all tasks related with the transmitter The installation can be completed successfully without the use of instruments and does not require special tools However for installation quality purposes a performance check is recommended as in accordance with best engineering practices We are certain that w...

Page 36: ...AND FORMS OF ELECTRONIC EQUIPMENT THE INSTALLATION OPERATION AND MAINTENANCE OF THIS EQUIPMENT THAT IS THE RESULT OF IMPROPER PROCEDURES OR USE BY INDIVIDUALS IMPROPERLY TRAINED OR LACKING THE KNOWLEDGE TO PERFORM ASSOCIATED TASKS ALL LOCAL CODES FOR BUILDING SAFETY FIRE OR RELATED STANDARDS MUST BE OBSERVED CONSULT LOCAL AUTHORITIES FOR THE STANDARDS FOR THE AREA OR REGION WHERE THE EQUIPMENT WIL...

Page 37: ...ust be sent freight prepaid and properly insured by customer When communicating with Linear please refer to your Order or Invoice Number Unpacking Use care when unpacking the equipment First perform a visual inspection of the item s to determine if any damage occurred during shipment Be sure to retain all the shipping materials crates and boxes or cartons until such time that it has been determine...

Page 38: ...pamentos Eletrônicos S A s Technical Support Department Voltage transients with a duration of micro and nano seconds are a constant challenge for the solid state circuits The downtime and the equipment maintenance make the preventive protection the best warranty against these surges This protection can be in many forms from isolation transformers and no breaks to the more efficient but more expens...

Page 39: ...t the tower is used as a part of the protection system The lightning protection device used in these cases is called lightning rod and has the function of guiding the electrical discharge safely avoiding other parts of the system to be hit and damaged by it The use of a lightning rod is MANDATORY The project and installation of grounding and lightning protection systems must be performed by specia...

Page 40: ...the distance between them depends on the kinds of antenna used and the kind of stacking used This must be studied thoroughly in order to obtain the best solution for each case Cables and Connectors All cables must be carefully installed in order not to be twisted during the installation process When using 7 8 or 1 2 cables please pay attention to their bending that must not be made in spaces small...

Page 41: ...n and continuous service during thunderstorms with lightning the use of a reliable grounding system is paramount Lightning is a transient high current eletric discharge that happens between the ground and the clouds therefore the most important part of a lightning protection system are the parts that are on the ground In order to maintain the low impedance of the technical grouding system it must ...

Page 42: ...asses to the grounding system using the grounding rig that comes with them Connect the gate and all the wires from the fence to the grounding system Connect the neutral wire from the public power line to the grounding system Connect the rig from the lightning rod to the grounding system with the shortest connection possible avoiding cable splices The tower s structure must also be connected to the...

Page 43: ...View EC701HP with double exciter 3 4 Mechanical Drawings This section shows the mechanical drawings relative to the external structure of the equipment including location of drawers Note POWER DRAWER MOD GV 40087 EXCITER MOD GV 4992 CABLESORGANIZER LOWPASS FILTER MOD 40055 RFSAMPLING PROBE MOD 40052 SOND 158 158 ...

Page 44: ...3 7 Manual Rev 0 0 March 2018 Section 3 Installation ATSC EC701HP Transmitter 3 4 2 Rear View Figure 3 2 Rear wiew Model EC701HP rack of 8 units ...

Page 45: ...3 8 Manual Rev 0 0 March 2018 Section 3 Installation ATSC EC701HP Transmitter 3 4 3 Isometric View Figure 3 3 Isometric View Model EC701HP ...

Page 46: ...3 9 Manual Rev 0 0 March 2018 Section 3 Installation ATSC EC701HP Transmitter 3 4 4 Dimensions mm Figure 3 4 Front view Figure 3 5 Side view ...

Page 47: ...3 10 Manual Rev 0 0 March 2018 Section 3 Installation ATSC EC701HP Transmitter 3 4 5 Top view Figure 3 6 Top view of EC701HP LOWPASS FILTER MOD 40055 ...

Page 48: ...hows the options 6 ETHERNET RJ45 input connector for monitoring and control via TCP IP protocol 7 USB Port USB Device Port used to GUI8001 communication with the software allowing the user perform mesuares on to the transmitter and make corrections linear and non linear 8 USB Host Port used for communication with storage devices USB Drives FAT32 up to 4GB allowing the user to import and export dat...

Page 49: ...easures the user to the transmitter and perform corrections linear and non linear 5 ASI 310M IN 2 Electric interface DVB ASI C Function Transport Stream TS input Type BNC female Impedance 75 6 ASI OUT 2 Electric interface DVB ASI C Function ASI signal sample from the modulator Type BNC female 7 1PPS OUT Function Monitoring or connection to other equipment Type BNC female 8 10MHz OUT Function 10MHz...

Page 50: ...ency network SFN Type BNC female 22 ASI OUT 1 Electric Interface DVB ASI C Function ASI signal sample from the modulator Type BNC female 23 ASI 310M IN 1 Electric Interface DVB ASI C Function Transport Stream TS input Type BNC female Impedance 75 24 ETHERNET Function Input Transport Stream over IP It supports multicast streams Unicast the UDP RTP protocols Allows access by GUI8001 software via UDP...

Page 51: ...D lights onlyGREEN indicating that is POWERED ON SHDN Power Supply Shutdown FWD Over Forward Power RFD Re ected Power PA PAFailure High Current on PA Low Current on PA Current UNBAL on PA Low Gain on PA High Temperature on PA Communication Failure on PA DRV High Current on Driver Low Current on Driver Low Current on Pre Driver High Current on Pre Driver Low Gain on Driver High Temperature onDriver...

Page 52: ...rawer s rear panel RF OUT Unflanged 7 8 RF output connector female for the power module RF IN SMA connector female for the RF input from the excitation drawer Function of the pins of PLUG IN connector Figure 3 11 PLUG IN Connector POWER SUPPLY FUSE RF INPUT PLUG IN CONNECTOR RF OUTPUT AC INPUT CONTROL INTERFACE Pin Function 1 Address A2 3 RS 485A 5 6 Address A1 7 GND 8 GND 10 11 Address A0 13 RS 4...

Page 53: ...le RF IN SMA connector female for the RF input from the excitation drawer RF SAMPLE SMARF signal sample output connector female Approximately 10dBm level AC IN AC 220V power input connector COMM DB15 connector male used for RS 485 standard serial communication between power drawer and central control RF OUTPUT RF SAMPLE FUSÍVEL DA FONTE DE ALIMENTAÇÃO ENTRADA RF ENTRADA AC INTERFACE DE CONTROLE PO...

Page 54: ...ion Equipament Managment Type RJ45 9 11 ASI 310M IN 1A ASI 310M IN 1B Function Transport Stream input Type BNC Female Impedance 75 Ohms 10 15 ETHERNET STREAMING A ETHERNET STREAMING B Function Transport Stream over IP Interface Type RJ45 12 13 ASI 310M IN 2A ASI 310M IN 2B Function Transport Stream input Type BNC Female Impedance 75 Ohms 14 16 ASI OUT A ASI OUT B Function SampleASI signal modulato...

Page 55: ...ssary to change the transmitter s electric network structure please get in contact with Hitachi Kokusai Linear Equipamentos Eletrônicos S A s Digital Support department for the corresponding instructions If the network structure is changed without previous notice the transmitter guarantee shall be suspended NEVER change the transmitter s network structure without previous instruction from Hitachi ...

Page 56: ...ed in such a way so as to ensure easy access from any side The gap between the transmitter and the shelter walls must be minimum 1 0 meter 3 In case of installation on a site that contains other transmitters connected do not position the transmitter in a location that can receive hot air from other transmitters Figure 3 15 AC Grounding Site Grounding Visual Inspection a Remove the lateral and rear...

Page 57: ...ion 3 Insert and fasten the power drawer in the rack 4 Insert and fasten the digital exciter B 5 Insert and fasten the digital exciterA 6 Insert and fasten the Ethernet switch 7 Check the presence and physical integrity of all the drawers powerfeeding and communication points EXCITER B MOD GV 4992 POWER AMPLIFIER MOD GV 40087 EXCITER A MOD GV 4992 SWITCH ETHERNET ...

Page 58: ...rnet NOTE Before making connections remove all Yellow cable ties fixed cables A RF cables These cables are used in the connections between the digital exciter and power drawer and between equipment and filter Make the connection between the output of the exciter identified as RF OUTPUT and RF IN of the power drawer Cable type Connector N M Connector SMA M RG16 50 Ohms Figure 3 17 Connector RF OUTP...

Page 59: ...d 3 pin connector located in the left side of the exciter draw er s rear panel Figure 3 18 ACInput cable ON OFFswitch and fusible Module 4992 Connect the grounding mesh in the GND screw on the rear panel of exciter Figure 3 19 Screwgrounding Digital Exciter EXCITER EXCITER SCREW GROUNDING GND Ground Connect this terminal to ground at the installation site ...

Page 60: ... connection between the connector labeled CONTROL I O on the exciter and the connector labeled RS485 in the power drawer Observe the connections in the photo below D Measurement Reading Cable and Communication Cable PIN 4 CON 2 PIN 10 CON 2 Figure 3 21 I O CONTROL connector MOD GV 4992 Red Mesh White White Red COR COR A10 A9 A8 A6 A4 PINO PINO RS485 B GND RS485 A Re ected Power Reading Direct Powe...

Page 61: ...cables from the top panel of the transmitter to the respective connectors on the rear panel of the exciter MOD GV 4992 E Transport Stream ASI Cables Connect the other points of the exciter according to the tables below Figure 3 22 ASI cables input MOD GV 4992 Figure 3 23 Top panel connections ...

Page 62: ...I OUT A ASI OUT 1 BNC F BNC M RG59 75 Ohms 7 10MHz REF IN A E r xcite E r xcite E r xcite E r xcite E r xcite 10MHz IN BNC F BNC M RG58 50 Ohms Description F Ethernet Switch Cables MOD SWT DES 1024D D LINK Make the connection between the switch module and CONTROL PORT connector of the transmitter top panel Make the connection between the switchmodule and the frontport ethernet of the exciter A Mak...

Page 63: ...power feeding Grounding Rigid line Filter Antenna Transport Stream IN A AC Power Feeding Pass theAC power feeding cables through the hole at the rack bottom and connect them to the AC input connector Figure 3 25 Equipment AC Power Cable CIRCUIT BREAKER AC INPUT CONNECTOR AC input connector Rack Identification of pins A Phase GY B GND GR YL C Phase Neutral RD ...

Page 64: ...om of the rack GROUNDING SCREW GROUNDING SCREW Before energizing the transmitter ensure that the localized circuit breaker on the right rear side of the transmitter rack is off ATTENTION Figure 3 26 Grounding screws Bottom of the rack C Rigid line Filter Antenna Connect the rigid lines as required to interconnect the equipment to the filter and the filter to the antenna ...

Page 65: ...t streams as programming source b Programming BNC connector is located on the top panel of the transmitter c Connect the applicable signal cables on the top cover of the rack D Programming Figure 3 27 Connections Panel Transmitter RF AFTER FILTER IN A GPS ANTENNA IN A ASI 1 INPUT ASI 2 INPUT ASI 1 OUTPUT External 10MHz reference ...

Page 66: ...e RF power DC currents temperature alarms and communication A Initial Precautions Firstly you must ensure that the general circuit breaker is off Ensure that the POWER ON OFF button is off should be in the OFF position Check with multimeter the AC input voltage of the transmitter and verify that it is within specifications To avoid damaging the equipment never turn on without having it connected t...

Page 67: ...output Connectionof the cable to the transmitter s antenna Connection of the measurement Reading cable Proper grounding Power source connection observe power supply T220 T380 etc Check that the AC connections are fixed properly Trigger the POWER ON OFF button of the transmitter s front panel Check the status of current alarms Setting the output power to 0 watts For security purposes access the pow...

Page 68: ... 0000 and press ENTER Select Clear Alarm Log 3000 Press ENTER Deleted alarms LED PASTALARM deleted In the Main Menu screen select Measurements and press ENTER Select Communication Satus and press ENTER In the 2500 screen will be shown the communication Status RS485 with the power drawer Resetting the status of older alarms PAST ALARM Verification of the communication Status between Power drawer an...

Page 69: ...n the readings related to the quiescent current of the transistors which can be displayed in three sequences of the 2320 screen to the power drawer 01 Use the key to view the current modules and the keys or to select the drawer The current of the Driver ID shall be about 1 2 A The currents I1 I3 I5 and I7 shall be about 1 0 A The currents I2 I4 I6 and I8 shall be about 0 A Readings sequence of pow...

Page 70: ...er use the button or To change the temperature from º C to º F press and hold and Programming the Power to 10 of rated output Gradually increase the output power of the transmitter to 10 of the rated output In the screen Main Menu 0000 select Setup Menu Press ENTER Select Power Setup and press ENTER In the screen Drawer Measurements 2300 select Temperature Press ENTER Manual Rev 0 1 February 2018 ...

Page 71: ...ton to display the remaining items on this menu Measuring the power Screen 2100 TheALC voltage is directly proportional to the RF power at the transmitter output Program the value of 10 of rated output Use the right button on your keyboard to increase the RF power Confirm the selected value by pressing the ENTER key center key on the keyboard Manual Rev 0 1 February 2018 ...

Page 72: ...re is any abnormal or differential heating in the connection joints between the transmitter filter antenna and adder s imbalance load If there is any abnormal warming in an isolated way this may indicate some flaw or imperfection in that connection This must be checked before continuing on increasing the transmitter power Use the key to display the next screen option NOTE When operating under norm...

Page 73: ...sport Stream To access the screen of BTS flow measure one should follow the following sequence of screens starting from the Measurements menu In the screen Measurements 2000 select Transport Stream Press ENTER Use the key to display the remaining items on this menu Set the Mute on TS Loss Off Manual Rev 0 1 February 2018 ...

Page 74: ... section 5 It is noteworthy that after the change of the output power of the transmitter the intermodulation B Transmitter s Pre Correction The linear and non linear pre corrections are previously applied to the transmitter in the factory C Enable and disable the linearization Non Linear Pre Correction You can enable or disable the non linear pre correction by the front panel Linear Pre Correction...

Page 75: ...tal display according to instructions given in the Operation Section of the Digital Control System If the value of the reflected power exceeds the value of 5 of rated power the control will immediately signal this fact by lighting the LED current alarm on the front panel of the digital exciter will provide on the current alarm screen and this will trigger the routine protection against reflected p...

Page 76: ... alarm and with other alarms that identifiy which of the drawers are not operating and the reason of it The EC701HP transmitter uses reduction table for modules Below the formula for calculating table PAs Power Amplifiers The default temperature value of the transistor is 60 140 F factory set the hottest transistor will be the reference The temperature can be set between 50 and 60 in Setup PATempe...

Page 77: ...s Below is a detailed description about the operational software configuration and operation system installed in the ATSC transmitters located within of the exciter On the front panel of the Exciter there is a LCD Display with 2 lines and 40 columns Also a circular keypad with a set of 4 command keys in gray color and one centered termed ENTER on black color An escape key ESC complete the set of 6...

Page 78: ...ous screen 5 2 1 Keypad 5 2 2 Display To browse over the LCD screen follow the instructions below Using the key or position the cursor represented by an arrow next to the item to be accessed Press ENTER Remark Please note that all screens are assigned a 4 digit number on the top right of the LCD screen These numbers represents the screen position on the command menu Besides the LCD screen and the ...

Page 79: ...HITACHI KOKUSAI LINEAR EC704HP 8VSB ATSC Digital Exciter Main Menu 1 5 0000 Setup Menu Main Menu 2 5 0000 Measurements Main Menu 3 5 0000 System Alarms Log Up and Down Keys Any key Channel 14 Output 2900 W TV Transmitter 10 03 16 15 24 37 idle for 5 minutes Main Menu 4 5 0000 Remote Access Main Menu 5 5 0000 Options Manual Rev 0 1 February 2018 ...

Page 80: ... Main Menu 1 5 0000 Setup Menu Esc Key Setup Menu 06 17 1000 Modulation Settings Setup Menu 07 17 1000 Time and Date Setup Setup Menu 08 17 1000 Password Setup Setup Menu 09 17 1000 Transport Stream Input Setup Menu 10 17 1000 Alarms Mask Setup Menu 11 17 1000 USB Setup Setup Menu 12 17 1000 USB Host Access Setup Setup Menu 13 17 1000 Crest Factor Reduction Setup Menu 14 17 1000 Clock Reference Se...

Page 81: ...ters may damage the equipment Continue No LO Leakage Suppression 1 2 1400 I Oset 0 00 mV Up and Down Keys LO Leakage Suppression 2 2 1400 Q Oset 0 00 mV Setup Menu 04 17 1000 LO Leakage Suppression Setup Menu 05 17 1000 Pre Correction WARNING Changing these parameters may damage the equipment Continue No Pre Correction Setup 1 2 1500 Non Linear Pre Correction Setup 2 2 1500 Linear Non Linear Pre C...

Page 82: ...1 2 1800 Enable Choose new password Password Setup 2 2 1800 Disable Password Up and Down Keys Enter Key New Password 1 1 1810 Write new password 0 0 0 0 Setup Menu 09 17 1000 Transport Stream Input Transport Stream Input Setup 1 3 1900 TS Switch Mode Automatic Transport Stream Input Setup 2 3 1900 TS Swicth Hold On Up and Down Keys Transport Stream Input Setup 3 3 1900 TS Switch Sel TS1 2 Up and D...

Page 83: ...Setup 2 8 1E00 2nd Priority External PPS Up and Down Keys Clock Reference Setup 6 8 1E00 PPBmax Cal 1500 Clock Reference Setup 8 8 1E00 Zero PPB Cal 131072 Up and Down Keys Esc Key Up and Down Keys Up and Down Keys Enter Key Esc Key Crest Factor Reduction 1 3 1D00 CFR Status Bypass Up and Down Keys Crest Factor Reduction 3 3 1D00 Factor 100 Max MER 46 0 dB Left or Right Keys Setup Menu 15 17 1000 ...

Page 84: ... Down Keys Drawer 01 02 Current 1 3 2320 I1 7 12 A I2 5 95 A Drawer 01 02 Current 2 3 2320 I3 6 59 A I4 6 29 A Drawer 01 02 Current 3 3 2320 ID 2 14 A Drawer Measurements 3 3 2300 Temperature Drawer 01 02 Temp hold 1 3 2330 T1 36 5 ºC T2 36 48 ºC Drawer 01 02 Temp hold 2 3 2330 T3 36 8 ºC T4 34 7 ºC Up and Down Keys Drawer 01 02 Temp hold 3 3 2330 TD 33 4 ºC Measurements 4 9 2000 Exciter Power Sup...

Page 85: ...ail 8V Fail 50V Fail Enter Key Esc Key Esc Key Measurements 8 9 2000 Clock Measurements Clock Measurements 1 7 2800 Int GPS No Signal Clock Measurements 2 7 2800 Ext PPS No Signal Up and Down Keys Clock Measurements 3 7 2800 Ext 10M No Signal Clock Measurements 4 7 2800 Cur TS No Signal Clock Measurements 5 7 2800 Cur Cal 131072 50 0 Holdover Clock Measurements 6 7 2800 Last Cal 131072 50 0 Holdov...

Page 86: ...000 Drawers Alarms System Alarms Log 4 4 3000 Clear Alarm Log Up and Down Keys Main Menu 3 5 0000 System Alarms Log Enter Key Esc Key Alarm Log Since 05 05 11 13 34 56 3200 05 05 11 13 34 56 Sync Loss Esc Key Esc Key Drawers Alarms 1 2 3300 Current Alarms Enter Key Drawer 01 01 Current Alarms 1 1 3310 Alarm List Empty Esc Key Drawers Alarms 2 2 3300 Past Alarms hold Enter to Clear Drawer 01 01 Pas...

Page 87: ...Enter Key Esc Key IP Address 1 1 4210 192 168 100 115 Enter Key Subnetwork Mask 1 1 4220 255 255 255 000 Esc Key Esc Key Remote Access 1 2 4000 Frontal Ethernet Port Remote Access 2 2 4000 Host Address Up and Down Keys Main Menu 4 5 0000 Remote Access Esc Key Frontal Ethernet Port 1 3 4100 IP Address Frontal Ethernet Port 2 3 4100 Subnetwork Mask Frontal Ethernet Port 3 3 4100 Gateway Enter Key Es...

Page 88: ...00 Options Esc Key Esc Key Enter Key Options List 1 7 5200 Linear Pre Correction Options List 2 7 5200 Memoryless Non Line Pre Correction Options List 3 7 5200 Memory Non Linear Pre Correction Up and Down Keys Options List 4 7 5200 Measurement Software Options List 5 7 5200 Crest Factor Reduction Options List 6 7 5200 Scheduler Options List 7 7 5200 Internal GPS Options 4 4 5000 Time Limited Optio...

Page 89: ...ded in five sections Setup Measurements System Alarms Remote Access and Options Notes It is always possible to return to the previous LCD screen by pressing the ESC key After 5 minutes the initial LCD screen menu is displayed The SETUP screens permit the selection and changes on the configuration and operational parameters The menu on the table follow profiles the possible operations under SETUP W...

Page 90: ...f go back to the preferable input if has stopped failing Alarms Mask Enable or disable conditions to generate alarms USB Setup Selects one of three USB ports available on the 8001 Device Rear Device Frontal PC software GUI8001 Host Frontal USB flash drive for software upgrade USB Host Access Setup With USB Host Frontal selected use this menu and follow further instructions to make a software upgra...

Page 91: ...o decrease the power Once the desirable power level is adjusted press ENTER for software acknowledgement otherwise the change will not become effective 5 5 2 Transmitter Setup Under this menu it is possible to turn ON and OFF the ALC Automatic Level Control mute or do not mute the RF power output on the absence of Transport Stream and also select being local or remote the transmitter output level ...

Page 92: ...g purposes must be taken before the output mask filter The amplitude values are shown in dB and the phase related values ar shown in degress Starting at the setup menu screen 1000 select Image Frequency Suppression and press ENTER The screen below will appear ATTENTION When accessing this screen by selecting option YES the operator will be responsible for the changes done on this parameter as well...

Page 93: ...es use keys and To program the values use keys and Press ESC to return to the Setup Menu Starting from Setup Menu screen 1000 Select LO Leakage Suppression and press ENTER The screen below will appear To access the LO Leakage Suppression screen select Yes by using the keys or Selecting NO the software goes to the previous screen To program the values use keys and Manual Rev 0 1 February 2018 ...

Page 94: ...his screen by selecting option YES the operator will be responsible for the changes done on this parameter as well as the effects that these changes may cause in the equipment if not using the appropriate instruments and test point 5 5 5 Active De active Pre Correction After the linear and non linear pre correction process by Hitachi Kokusai Linear staff through these screens it is possible to act...

Page 95: ...e equipment if not using the appropriate instruments and test point To access the Pre Correction screen select Yes by using the keys or Selecting NO the software goes to the previous screen Select Non Linear and press ENTER Use the keys or to enable or disable the pre correction Press key ESC to return to Pre Correction Setup Select Linear and press ENTER Use the keys or to enable or disable the p...

Page 96: ...g option YES the operator will be responsible for the changes done on this parameter as well as the effects that these changes may cause in the equipment if not using the appropriate instruments and test point To access the Modulation Settings select Yes by using the keys or Selecting NO the software goes to the previous screen Use the keys or to enable or disable the modulation Hit key to view th...

Page 97: ...ssword for the equipment Please be certain to capture and store your password in a safe place To access the password configuration screen the operator must follow the sequences below starting from the Setup Menu 1000 Select Password Setup and press Enter To enable the password or set a new one select Enable Choose new password To set the password use the keys and keys to move the arrow head under ...

Page 98: ...ed it dispenses the use of password Press key ESC to return to Setup Menu 5 5 9 Transport Stream Input Select Transport Stream Input and press ENTER Use the keys and to configure automatic or manual Hit key to view the next screen Use the keys and to select On or Off Hit key to view the next screen Use the keys or to select TS 1 or TS 2 Press key ESC to return to Setup Menu and hit key to view the...

Page 99: ...ask and press ENTER Use the keys or to select TS1 TS2 or TS1 TS2 Press key ESC to return to Setup Menu and hit key to view the next screen 5 5 11 USB Setup Select USB Setup and press ENTER Use the keys or to configure USB Press key ESC to return to Setup Menu and hit key to view the next screen Manual Rev 0 1 February 2018 ...

Page 100: ... screen 5 5 13 Crest Factor Reduction The screen below will appear ATTENTION When accessing this screen by selecting option YES the operator will be responsible for the changes done on this parameter as well as the effects that these changes may cause in the equipment if not using the appropriate instruments and test point To access the Crest Factor Reduction screen select Yes by using the keys or...

Page 101: ...he next screen Use the keys or to adjust the value and hit key to view the next screen Use the keys or to adjust the value 5 5 14 Clock Reference Select Clock Reference and press ENTER Use the keys or to program the value Hit key to view the next screen Use the keys or to program the value Hit key to view the next screen Manual Rev 0 1 February 2018 ...

Page 102: ...or to program the value Hit key to view the next screen Use the keys or to program the value Hit key to view the next screen Use the keys or to program the value Hit key to view the next screen Use the keys or to program the value Hit key to view the next screen Use the keys or and or to program the value Press key ESC to return to Main Menu Manual Rev 0 1 February 2018 ...

Page 103: ...ote These values can be modified in the factory s menu although the readjustment command may be implemented through the user menu After each modification in the parameters it is mandatory to re do the non linear precorrection It is recommended in periodic maintenance to carry out the adjustment of the polarization of the RF transistors of the power drawers to compensate for variations occurring as...

Page 104: ...ru EC708HP ATTENTION When applying the Transistor Bias Adjustment function the power will be zeroed After adjusting the currents you must reprogram the output power through the Setup Menu Power Setup Screen 1 1 1100 Use the key or to view the values Manual Rev 0 1 February 2018 ...

Page 105: ...ating temperature of the power amplifiers drawer Select PA Temperature Control and press ENTER The following screen will be displayed Use the key or to set up Confirm the selection by pressing ENTER The temperature amplifier PA can be adjusted from 50ºC to 60ºC Note For details on setting the temperature see the Activation section 55 0 Manual Rev 0 1 February 2018 ...

Page 106: ...er Supply Driver Power Supply driver input power supply measurement Current Measure the electrical current of the drawer modules Drawers Temperature Temperature measurements of the drawers 3 3V 3 3V voltage power supply measurement 15V 15V voltage power supply measurement 5V 5V voltage power supply measurement Exciter Power Supply Voltage 28V 28V voltage power supply measurement Communication Stat...

Page 107: ...with this reference and the current PPS obtained with the internal control system of the OCXO delivered on PPS output connector When this input is configured as current reference a message identifies if the OCXO is in the frequency or phase locking process and the phase difference is also available Cur TS This field displays NO SIGNAL or UNKOWN SIGNAL in the absence of a proper input signal When v...

Page 108: ...reens below must be followed starting from the initial menu 5 6 1 Power Access Measurements Access Power and hit ENTER Hit ESC key to return to the prior screen Hit key to view the other screens that are part of this menu 5 6 2 Transport Stream To gather information about the status of the incoming transport stream follow the instructions below starting on the main menu screen Access Measurements ...

Page 109: ...6 3 RF Power Drawer Measurements For RF Power Module it is possible to measure a Power Supply Voltage 50V Power Supply and 28V Driver Power Supply b electrical current I1 I2 I3 I4 I5 I6 I7 I8 and ID c temperature T1 T2 T3 T4 T5 T6 T7 T8 and TD Hit the ESC key to return to the measurements screen menu or return to the main menu screen and select measurements Select Drawers and hit ENTER Manual Rev ...

Page 110: ...ower Supply and hit ENTER Hit key to view the other screens that are part of this menu Select Current and press ENTER For select the drawer use the key or Check the displayed data Press ESC to return to the menu Drawer Measurements Press the key to view the next screen Manual Rev 0 1 February 2018 ...

Page 111: ...pact ATSC Transmitters EC701HP thru EC708HP Select Temperature and press ENTER Hit key to view the other screens that are part of this menu Check the displayed data Press ESC to return to the menu Drawer Measurements Manual Rev 0 1 February 2018 ...

Page 112: ...ly and hit Enter Use the Up and Down keys and to check the following voltage measurements Hit ESC key to return to the Measurements screen From the LCD screen it is possible to conduct and view a diagnostic check f the communication link between the exciter unit and the RF power amplifier drawer P01 Press ESC to the Main Menu screen and then to the screen 2000 is reached as below 5 6 5 Communicati...

Page 113: ...r FPGA digital exciter s microcontrollers and power drawers Such name and version must be reported to the factory in case of maintenance and checking of occurrences It shows also the digital exciter s hardware version The figures below show how to access the version screens from the Measurements menu 5 6 6 Software Hardware Version Press the ESC key to return to the Main Menu Select Software Versi...

Page 114: ...easurements press ESC key This screen indicates the voltage levels related to the Automatic Level Control ALC loop Starting from the Measurements Menu 2000 5 6 7 Automatic Level Control Select Automatic Level Control and hit ENTER Hit ESC key to return to the Measurements screen Manual Rev 0 1 February 2018 ...

Page 115: ...P 5 6 8 Clock Measurements Select Clock Measurements and hit ENTER Hit key to view the other screens that are part of this menu This screen allows checking the clock measurements The figures below show how to access the Clock screen from the Measurements menu Manual Rev 0 1 February 2018 ...

Page 116: ...SS The next LED alarm is for a current malfunction present on the equipment and requires investigation see CURRENT ALARM The third LED indicates a past alarm see PASTALARM This situation indicates that an alarm is no longer present On normal operation just a green LED is ON which confirms that the AC input power is present Once a CURRENTALARM LED is ON the origin of the alarm should be investigate...

Page 117: ...alarms Press ESC to return to the System Alarms Log menu Select Alarm Log and press ENTER to view all the existing alarms i e current and past alarms The symbol before the log indicates that the alarm date and time have been recorded The symbol before the log indicates that the date and time in which the alarm stopped have been recorded Example When an alarm stops the corresponding time is stored ...

Page 118: ...og screen 3000 Starting from the System Alarms Menu 3000 5 7 3 Drawers Alarms Select Current Alarms and press ENTER to check current alarms Use the keys or to select one among many RF power drawers Press key ESC to return to the previous screen Drawers Alarms Select Past Alarms and press ENTER to check past alarms Use the keys or to select one among many RF power drawers Select Drawers Alarms and ...

Page 119: ... the possible alarms and the respective measures to be taken when an alarm occurs 5 7 4 Clear Past Alarms Under this menu it s possible to erase the past alarms occurrence Starting from the System Alarms Menu 3000 Select Clear Past Alarms and hit ENTER to erase past alarms occurrences Manual Rev 0 1 February 2018 ...

Page 120: ...er Check for mal function on the UP Converter Substitute the module Fifo Overflow FIFO Overflow modulator Full analysis of the circuitry will be necessary Get in contact with Hitachi Kokusai Linear s technical support service 15V 3 3V 2 8V 5V PS failure 15V 3 3V 28V or 5V Follow the basic procedure with voltmeter looking for some clear evidence of malfunction Replace the module if necessary FPGA C...

Page 121: ...ese connections are located on the Exciter read panel green connector Get in contact with Hitachi Kokusai Linear s technical support service RF Load Fan F ail It indicates failure of one or more fans loads drawer or the temperature of the drawer is greater than 90 C Check the mains power connection of the tail fan module This is located at the rear of the loads drawer Switch fan module or if appro...

Page 122: ...AC unit Drawers Alarms Failure on the RF Power Drawer Via LCD check which RF Power Drawer listed is as the failure one Access Main Menu System Alarms Log Drawers Alarms All PA Fail Indication that the all PA s of the power drawer are damaged This alarm there is only in the EC701HP Get in contact with Hitachi Kokusai Linear s technical support service Driver PA Fail Indication that the driver of th...

Page 123: ...igurations may be accessed as shown in the operation section Local or remote PC virtual It is possible to change and or monitor all of the parameters and measurements as is done at the frontal panel through the WEB server To accomplish this it is necessary to configure the IP Mask Gateway 5 8 1 IP Configuration Start from the Main Menu Select Remote Access and press ENTER Select Frontal Ethernet P...

Page 124: ...s or and or Press ESC to the Remote Access screen Hit key to view the next screen 5 8 3 Gateway Configuration Access the Gateway and press ENTER Configure the gateway address by using the keys or and or 5 8 2 Mask Configuration Select Host Address and press ENTER Select IP Address and press ENTER 5 8 4 Host Address Configuration IP Address Manual Rev 0 1 February 2018 ...

Page 125: ...by using the keys or and or Subnetwork Mask Access the Subnetwork Mask and press ENTER Configure the Subnetwork Mask by using the keys or and or Press ESC to the Host Address screen Access the Host Port and press ENTER Host Port Configure the Subnetwork Mask by using the keys or and or Manual Rev 0 1 February 2018 ...

Page 126: ...tters EC701HP thru EC708HP 5 9 Options Select Options and press ENTER Select Serial Number and press ENTER Hit key to view the next screen Select Option List and press ENTER Hit key to view the other screens that are part of this menu Manual Rev 0 1 February 2018 ...

Page 127: ...ATSC Transmitters EC701HP thru EC708HP Press ESC to return the Options screen Hit key to view the next screen Select Enable Option and press ENTER Hit key to view the next screen Select time Limited Options and press ENTER Manual Rev 0 1 February 2018 ...

Page 128: ...dequate training to perform maintenance on this type of equipment Failure to comply with what has been mentioned above may result in loss of warranty IMPORTANT 1 The life expectancy depends on the operating conditions of the equipment 2 Temperature controlled environments increase the life expectancy of components 3 On semiannual inspections if there is abnormal noise or vibration of the 3 fan mod...

Page 129: ...play 1 3 Remove accumulated dust from the air inlet lters located on the bottom of the panel and on the side and rear covers 1 4 If it is not possible to use the air jet provide a brush of very soft bristles avoiding to scratch the paint of equipment 1 5 Clean fan air lters in power drawers medium power transmitters only Verify how cleaning is done in Corrective Maintenance 1 6 Replace the fan air...

Page 130: ...e display on the equipment panel and write down the values in a control sheet Compare the values obtained with the values of the test report made in the factory taking into account the tolerance of each measurement The monthly periodic veri cation of the measurements makes it possible to predict any abnormalities that may occur 3 1 Verify forward and re ected powers through the exciter display Mea...

Page 131: ...al passive to be between 45ºC and 50ºC 5 2 Check the room temperature of the transmitter 5 3 Check the RF cable air pressurizer 5 4 Check the connections and AC cables of the power distribution board circuit breaker and transmitter cables AC current and temperature 6 Adjusting Quiescent Currents Adjust the quiescent currents of the transistors through the driver display Screen Setup Menu Transisto...

Page 132: ...istors This re tuning procedure has been automated and is done by accessing the TransistorAgingAdjustment screen 21 21 in the Setup menu of the digital driver and it will take only a few seconds Here is the recommended frequency to perform this procedure Once after 3 months of operation Once every 6 months NOTE For Further details regarding the Quiescent Currents Automatic adjustment refer to sect...

Page 133: ...p and check the existing alarms 6 3 2 Measurement readings STEP 1 Check the voltage current and temperature measurements of the power drawer modules Access on the exciter front panel Main Menu Measurements Drawers and compare with the equipment measurements report If there is any abnormality contact the Hitachi Kokusai Linear Service Department 6 3 2 2 AC Unit MCCB Only high power transmitters HP ...

Page 134: ...from the front panel of the drawer STEP 2 Detatch the front panel STEP 3 Disconnect and remove a first degree of protection from the air filter STEP 4 Remove the air filter STEP 5 Remove the last grid of the air filter Figure 2 Front view Power Drawer MOD GV 40001 Espuma 1ST Protection grid Air filter STEP 6 Replace each fan air filter and reinstall it by reversing the order of steps above Figure ...

Page 135: ...M DESCRIPTION HITACHI CODE REFERENCE 1 FIL VEN 109 1001M13 HKL1000263 AIR FILTER Screws front panel Screws front panel 2nd protection grid 1st protection grid Air Filter Note For a correct fitting of the 1st protection grid in the 2nd protection grid the design of the 1st grid must match the design of the 2nd grid Section 6 Preventive Corrective Maintenance ...

Page 136: ...nt water or replace if necessary STEP 5 Reinstall the air filters by reversing the order of steps above Parafusos painel frontal Parafusos painel frontal Filtro de ar Filtro de ar 6 3 4 Power Drawer Fan Replacement Power Drawer MOD GV 40001 High Power For replacement see the steps below CAUTION It is recommended periodically to clean the air filter avoid blocking the air passage and consequently t...

Page 137: ...arefully detach and remove the first filter screen from the air filter STEP 4 Remove the last filter grid from the air filter and the fan Figure 7 Front view Power Drawer MOD GV 40001 1st protection grid Retirar parafusos Phillips M3x50 Figure 8 Air filter s 1st protection grid Figure 9 Fan Remove M3x50 Phillips Screws Section 6 Preventive Corrective Maintenance ...

Page 138: ...elow STEP 1 Remove the screws from the front panel of the drawer STEP 2 Remove the front panel of the drawer STEP 3 Remove air filter screws STEP 4 Clean with compressed air wash with detergent water or replace if necessary STEP 5 Remove the screws from each fan STEP 6 Disconnect the plug cables from the fan bus board CIM 30260 Conector PLUG CIM 3260 PLUG connector CIM 30260 Figure 10 Fan connecti...

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