10 Kw Uhf Band Transmitter

7/24/2019 10 Kw Uhf Band Transmitter

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PRESENTATIONPRESENTATION

OFOF

10 kW UHF band TV TRANSMITTER10 kW UHF band TV TRANSMITTER

Liquid Cooled TypeLiquid Cooled Type

ALREADY ON AIR !ALREADY ON AIR !

TB45TB45--103CL103CL 1010 kW UHF band TV TRANSMITTER Liquid Cooled TypekW UHF band TV TRANSMITTER Liquid Cooled Type


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ModularityModularity

The High Power UHF TransmittersThe High Power UHF Transmittersemploy a modular system for theemploy a modular system for themain submain sub--assembling: this providesassembling: this providesthe high standardisation of the sparethe high standardisation of the spare

part, so that the same units can bepart, so that the same units can beinstalled, as spare part, for severalinstalled, as spare part, for severaltransmitters throughout the Hightransmitters throughout the Highpower range from 5 kW to 60 kW.power range from 5 kW to 60 kW.

High level of performanceHigh level of performance

The Vision and Sound signalThe Vision and Sound signal

processing is provided for all TVprocessing is provided for all TVStandard and all types of AudioStandard and all types of Audioapplications (Mono & Dual soundapplications (Mono & Dual sound --BTSCBTSC -- NICAM and IRT) together withNICAM and IRT) together withcolour systems as PALcolour systems as PAL -- NTSCNTSC --SECAM.SECAM.

The RF transposition in the driver, isThe RF transposition in the driver, iscarried out by a synthesizers withcarried out by a synthesizers withvarious possibilities of accuracy andvarious possibilities of accuracy andstability as well precision offset lockedstability as well precision offset lockedby internal or external frequencyby internal or external frequencyreference.reference.

Modular 10W TV Exciter


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High Gain WideHigh Gain Wide--Band AmplificationBand Amplification

The RF amplifier is made up by five RFThe RF amplifier is made up by five RF

modules (UAmodules (UA--202L) installed in one202L) installed in one

rack , these are dedicated for therack , these are dedicated for theanalogue Vision and Sound carriersanalogue Vision and Sound carriers

common amplification or digital OFDMcommon amplification or digital OFDM

format.format.

The nominal output power for eachThe nominal output power for each

module is 2.2 kW (peak sync) withmodule is 2.2 kW (peak sync) with

associated 220 W (Sound), nominalassociated 220 W (Sound), nominal

gain is 40 dB . The amplifiers employgain is 40 dB . The amplifiers employsolid state LDMOS technology in ordersolid state LDMOS technology in order

to obtain wide band , reliability , andto obtain wide band , reliability , and

high efficiency .high efficiency .

Any RF module isAny RF module is Hot PluggableHot Pluggable

using no spill liquid technology tousing no spill liquid technology to

avoid coolant loss during the RFavoid coolant loss during the RF

module removing.module removing.


UA-202 UHF AmplifierSimplified block diagram

DRIVER STAGE OUTPUT STAGE

RF INRF OUTA /


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UAUA--202L RF MODULE202L RF MODULEAMPLIFIER key featureAMPLIFIER key feature

BroadbandBroadband, without any other, without any othertuning or alignment.tuning or alignment.

High Output PowerHigh Output Power up toup to 2.2kW2.2kW

peak syncpeak sync LDMOSLDMOS technologytechnology

Redundant DesignRedundant Design due to sixteendue to sixteenparalleled devices to the final stageparalleled devices to the final stage

Power Supply ReplacementPower Supply Replacementfacility allowed by separate plugfacility allowed by separate plug--inin

Amplitude and PhaseAmplitude and Phase

AdjustmentAdjustment facility accessible fromfacility accessible frompanelpanel

DiagnosticDiagnostic completely available incompletely available inlocally and remotelocally and remote

Very Low MTTR (MVery Low MTTR (Meanean TTimeimeTTroughrough RReplacementeplacement)) only 10only 10minutes in the worst case.minutes in the worst case.

Easy MaintenanceEasy Maintenance all internalall internalsubunit can be replaced withoutsubunit can be replaced withoutsoldering and complicatedsoldering and complicatedprocedure for alignment.procedure for alignment.

Compact DesignCompact Design allows toallows tominimize the dimensions and weightminimize the dimensions and weight


UA-202 UHF Amplifier

Hot Pluggable Draw


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Combining SystemCombining System

The Combining System includes allThe Combining System includes allsubunits of the transmitter fittedsubunits of the transmitter fittedfor splitting and coupling process infor splitting and coupling process inthe parallel power amplification,the parallel power amplification,intended to operate in the UHFintended to operate in the UHF

band (470 to 860MHz), with RFband (470 to 860MHz), with RFpower rating up to 12kW CW.power rating up to 12kW CW.

Each 10kW Power Section isEach 10kW Power Section isequipped of five 2 kW RF moduleequipped of five 2 kW RF moduleamplifiers connected by means ofamplifiers connected by means ofthe high performances IN LINEthe high performances IN LINESPLITTER COMBINERSPLITTER COMBINER system (seesystem (seefig. below).fig. below).


Advantage:- Broadband- Minimum number of sparepart

- No alignment requirement- High performances stability inthe time

- Compact design- Fully isolation

- Good matching in any conditionof failure

- Fault-tolerant design- Continuous service in anyfailure condition

Input

Power

Output

Power

SP

LITTING

COMBINING


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CLEAN DESIGNRear rack view with open door

Each RF module has an ownredundant switch-mode power supplyunit self-protected against over-

current and over-voltage , as well theover-temperature.The power supply units are installedbelow the RF modules in the separatehot pluggable draws. The redundantsystem provides to feed 50% (worstcase) of the each RF module final

stage.


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Flexible Cooling SystemFlexible Cooling System

The cooling system comprises an external unit (outside the tranThe cooling system comprises an external unit (outside the transmitter) for each Power Section ; the unit includes asmitter) for each Power Section ; the unit includes aredundant pumping set , coolant tank , filters and control panelredundant pumping set , coolant tank , filters and control panel for liquid temperature and flow control.for liquid temperature and flow control.

An Heat Exchanger is installed outside of the transmitter roomAn Heat Exchanger is installed outside of the transmitter room for each Cooling Unit, it is fitted with two fans in activefor each Cooling Unit, it is fitted with two fans in activestandby configuration for redundancy.standby configuration for redundancy.

The cooling liquid is a mixture composed by deThe cooling liquid is a mixture composed by de--ionized water and antifreeze like glycol, the active pump conveyionized water and antifreeze like glycol, the active pump conveys thes theheat transferring fluid towards the external heat exchangers; heheat transferring fluid towards the external heat exchangers; here the fluid releases heat to the external environment,re the fluid releases heat to the external environment,so its temperature is regulated.so its temperature is regulated.


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COOLING UNITCABINET (front view)

REDUNDANT PUMPING

SYSTEM LAYOUT (rear view)


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Mains Protection SystemMains Protection System

The Mains Distribution units areThe Mains Distribution units are

installed in power racks , theyinstalled in power racks , they

provide to feed the subunits withprovide to feed the subunits with

unregulated redundant AC powerunregulated redundant AC power

supply , the protection againstsupply , the protection against

the accidental line sparks isthe accidental line sparks is

performed by means of surgeperformed by means of surgearrester system.arrester system.

The high tolerance mains voltageThe high tolerance mains voltage

(( 20 %) is accepted by the20 %) is accepted by the

transmitter , so that in the mosttransmitter , so that in the most

situations, the Automatic Voltagesituations, the Automatic VoltageRegulator is not necessary.Regulator is not necessary.


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EasyEasy Operation and MaintenanceOperation and Maintenance

The Control UnitThe Control Unit provides the full managementprovides the full management

of the transmitter without the operatorof the transmitter without the operator

presence, the system involves a centralpresence, the system involves a central

controller and several peripheral units installedcontroller and several peripheral units installed

in each RF module and rack.in each RF module and rack.The control system includes a fault finding forThe control system includes a fault finding for

detecting equipment malfunctions and locatingdetecting equipment malfunctions and locating

the faulty subassembly which need to bethe faulty subassembly which need to be

replaced; the basic controls as Startreplaced; the basic controls as Start -- StopStop --

StandbyStandby -- Reset and power readout areReset and power readout are

permanently available.permanently available.

The interlock circuit is independent of theThe interlock circuit is independent of thesoftware and remains always operational duringsoftware and remains always operational during

the presence or not of the computer control.the presence or not of the computer control.

The communication protocol is in RSThe communication protocol is in RS--485485

format supported with specific software, theformat supported with specific software, the

operator interface is represented by an highoperator interface is represented by an high

resolution TFT graphic display and a simpleresolution TFT graphic display and a simple

keyboard, the menu is very friendly and easy tokeyboard, the menu is very friendly and easy touse .use .

The Control Unit can be fully controlled inThe Control Unit can be fully controlled in

REMOTE mode via link or via modem in RSREMOTE mode via link or via modem in RS--232.232.

Other interfaces are supported as LAN andOther interfaces are supported as LAN and

TCP/IPTCP/IP

10 Kw Uhf Band Transmitter

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