Harris Platinum HT EL 2000LS Technical Manual

TECHNICAL

MANUAL

HT EL2000LS/HS

994 9383 001 - HT EL2000LS

994 9384 001 - HT EL2000HS

T.M. No. 888-2457-001

Rev. B: 7-25-02

Rev. B1: 6-02-03

Harris Corporation

I Installation

II Operation

III Theory of Operation

IV Maintenance & Alignments

V Troubleshooting

VI Parts List

Transmitter

PA Amplifier Modules

VII RF Amplifier Modules

TECHNICAL MANUAL

HT EL2000LS/HS

994 9383 001 - HT EL2000LS

994 9384 001 - HT EL2000HS

888-2457-001

Returns And Exchanges

Damaged or undamaged equipment should not be returned unless written approval and a

Return Authorization is received from HARRIS CORPORATION, Broadcast Systems Divi-

sion. Special shipping instructions and coding will be provided to assure proper handling.

Complete details regarding circumstances and reasons for return are to be included in the

request for return. Custom equipment or special order equipment is not returnable. In those

instances where return or exchange of equipment is at the request of the customer, or

convenience of the customer, a restocking fee will be charged. All returns will be sent

freight prepaid and properly insured by the customer. When communicating with HARRIS

CORPORATION, Broadcast Systems Division, specify the HARRIS Order Number or In-

voice Number.

Unpacking

Carefully unpack the equipment and preform a visual inspection to determine that no appar-

ent damage was incurred during shipment. Retain the shipping materials until it has been

determined that all received equipment is not damaged. Locate and retain all PACKING

CHECK LISTs. Use the PACKING CHECK LIST to help locate and identify any components

or assemblies which are removed for shipping and must be reinstalled. Also remove any

shipping supports, straps, and packing materials prior to initial turn on.

Technical Assistance

HARRIS Technical and Troubleshooting assistance is available from HARRIS Field Service

during normal business hours (8:00 AM - 5:00 PM Central Time). Emergency service is

available 24 hours a day. Telephone 217/222-8200 to contact the Field Service Department

or address correspondence to Field Service Department, HARRIS CORPORATION, Broad-

cast Systems Division, P.O. Box 4290, Quincy, Illinois 62305-4290, USA. Technical Support

by e-mail: [email protected]. The HARRIS factory may also be contacted through a FAX

facility (217/221-7096).

Replaceable Parts Service

Replacement parts are available 24 hours a day, seven days a week from the HARRIS

Service Parts Department. Telephone 217/222-8200 to contact the service parts department

or address correspondence to Service Parts Department, HARRIS CORPORATION, Broad-

cast Systems Division, P.O. Box 4290, Quincy, Illinois 62305-4290, USA. The HARRIS fac-

tory may also be contacted through a FAX facility (217/221-7096).

NOTE

The # symbol used in the parts list means used with (e.g. #C001 = used with C001).

MANUAL REVISION HISTORY

888-2457-001

Rev. Date ECN Pages Changed

001-B 7/25/02 48420 Replaced Title Page, iv, and 4-6

Added MRH-1/MRH-2

888-2457-001 MRH-1/MRH-1

WARNING: Disconnect primary power prior to servicing.

This page left blank intentionally

Guide to Using Harris Parts List Information

The Harris Replaceable Parts List Index portrays a tree structure with the major items being leftmost in the index.

The example below shows the Transmitter as the highest item in the tree structure. If you were to look at the bill of

materials table for the Transmitter you would find the Control Cabinet, the PA Cabinet, and the Output Cabinet. In

the Replaceable Parts List Index the Control Cabinet, PA Cabinet, and Output Cabinet show up one indentation level

below the Transmitter and implies that they are used in the Transmitter. The Controller Board is indented one level

below the Control Cabinet so it will show up in the bill of material for the Control Cabinet. The tree structure of this

same index is shown to the right of the table and shows indentation level versus tree structure level.

Example of Replaceable Parts List Index and equivalent tree structure:

The part number of the item is shown to the right of the description as is the page in the manual where the bill for

that part number starts.

Inside the actual tables, four main headings are used:

Table #-#. ITEM NAME - HARRIS PART NUMBER - this line gives the information that corresponds to the

Replaceable Parts List Index entry;

HARRIS P/N column gives the ten digit Harris part number (usually in ascending order);

DESCRIPTION column gives a 25 character or less description of the part number;

REF. SYMBOLS/EXPLANATIONS column 1) gives the reference designators for the item (i.e., C001, R102,

etc.) that corresponds to the number found in the schematics (C001 in a bill of material is equivalent to C1 on the

schematic) or 2) gives added information or further explanation (i.e., “Used for 208V operation only,” or “Used

for HT 10LS only,” etc.).

Inside the individual tables some standard conventions are used:

A # symbol in front of a component such as #C001 under the REF. SYMBOLS/EXPLANATIONS column means

that this item is used on or with C001 and is not the actual part number for C001.

In the ten digit part numbers, if the last three numbers are 000, the item is a part that Harris has purchased and

has not manufactured or modified. If the last three numbers are other than 000, the item is either manufactured by

Harris or is purchased from a vendor and modified for use in the Harris product.

The first three digits of the ten digit part number tell which family the part number belongs to - for example, all

electrolytic (can) capacitors will be in the same family

(524 xxxx 000). If an electrolytic (can) capacitor is found

to have a 9xx xxxx xxx part number (a number outside of the normal family of numbers), it has probably been

modified in some manner at the Harris factory and will therefore show up farther down into the individual parts

list (because each table is normally sorted in ascending order). Most Harris made or modified assemblies will

have 9xx xxxx xxx numbers associated with them.

The term “SEE HIGHER LEVEL BILL” in the description column implies that the reference designated part

number will show up in a bill that is higher in the tree structure. This is often the case for components that may

be frequency determinant or voltage determinant and are called out in a higher level bill structure that is more

customer dependent than the bill at a lower level.

2-02-93

WARNING

THE CURRENTS AND VOLTAGES IN THIS EQUIPMENT ARE DANGEROUS. PER-

SONNEL MUST AT ALL TIMES OBSERVE SAFETY WARNINGS, INSTRUCTIONS

AND REGULATIONS.

This manual is intended as a general guide for trained and qualified personnel who are aware of the dangers inherent in

handling potentially hazardous electrical/electronic circuits. It is not intended to contain a complete statement of all safety

precautions which should be observed by personnel in using this or other electronic equipment.

The installation, operation, maintenance and service of this equipment involves risks both to personnel and equipment, and

must be performed only by qualified personnel exercising due care. HARRIS CORPORATION shall not be responsible for

injury or damage resulting from improper procedures or from the use of improperly trained or inexperienced personnel

performing such tasks.

During installation and operation of this equipment, local building codes and fire protection standards must be observed.

The following National Fire Protection Association (NFPA) standards are recommended as reference:

- Automatic Fire Detectors, No. 72E

- Installation, Maintenance, and Use of Portable Fire Extinguishers, No. 10

- Halogenated Fire Extinguishing Agent Systems, No. 12A

WARNING

ALWAYS DISCONNECT POWER BEFORE OPENING COVERS, DOORS, ENCLO-

SURES, GATES, PANELS OR SHIELDS. ALWAYS USE GROUNDING STICKS AND

SHORT OUT HIGH VOLTAGE POINTS BEFORE SERVICING. NEVER MAKE IN-

TERNAL ADJUSTMENTS, PERFORM MAINTENANCE OR SERVICE WHEN ALONE

OR WHEN FATIGUED.

Do not remove, short-circuit or tamper with interlock switches on access covers, doors, enclosures, gates, panels or shields.

Keep away from live circuits, know your equipment and don’t take chances.

WARNING

IN CASE OF EMERGENCY ENSURE THAT POWER HAS BEEN DISCONNECTED.

WARNING

IF OIL FILLED OR ELECTROLYTIC CAPACITORS ARE UTILIZED IN YOUR

EQUIPMENT, AND IF A LEAK OR BULGE IS APPARENT ON THE CAPACITOR

CASE WHEN THE UNIT IS OPENED FOR SERVICE OR MAINTENANCE, ALLOW

THE UNIT TO COOL DOWN BEFORE ATTEMPTING TO REMOVE THE DEFEC-

TIVE CAPACITOR. DO NOT ATTEMPT TO SERVICE A DEFECTIVE CAPACITOR

WHILE IT IS HOT DUE TO THE POSSIBILITY OF A CASE RUPTURE AND SUB-

SEQUENT INJURY.

i

ii

FIRST-AID

Personnel engaged in the installation, operation, maintenance or servicing of this equipment are urged to become familiar

with first-aid theory and practices. The following information is not intended to be complete first-aid procedures, it is a

brief and is only to be used as a reference. It is the duty of all personnel using the equipment to be prepared to give

adequate Emergency First Aid and thereby prevent avoidable loss of life.

Treatment of Electrical Burns

1. Extensive burned and broken skin

a. Cover area with clean sheet or cloth. (Cleanest available cloth article.)

b. Do not break blisters, remove tissue, remove adhered particles of clothing, or apply any salve or ointment.

c. Treat victim for shock as required.

d. Arrange transportation to a hospital as quickly as possible.

e. If arms or legs are affected keep them elevated.

NOTE

If medical help will not be available within an hour and the victim is

conscious and not vomiting, give him a weak solution of salt and soda:

1 level teaspoonful of salt and 1/2 level teaspoonful of baking soda to

each quart of water (neither hot or cold). Allow victim to sip slowly

about 4 ounces (a half of glass) over a period of 15 minutes. Discon-

tinue fluid if vomiting occurs. (Do not give alcohol.)

2. Less severe burns - (1st & 2nd degree)

a. Apply cool (not ice cold) compresses using the cleanest available cloth article.

b. Do not break blisters, remove tissue, remove adhered particles of clothing, or apply salve or ointment.

c. Apply clean dry dressing if necessary.

d. Treat victim for shock as required.

e. Arrange transportation to a hospital as quickly as possible.

f. If arms or legs are affected keep them elevated.

REFERENCE:

ILLINOIS HEART ASSOCIATION

AMERICAN RED CROSS STANDARD FIRST AID AND PERSONAL SAFETY MANUAL (SEC-

OND EDITION)

iii

Table Of Contents

Section I

Introduction/Specifications

Introduction......................................1-1

GeneralDescription .............................1-1

ControlandMonitoring............................1-1

Signal Flow Through the System.....................1-1

RFAmplifierModules.............................1-1

PowerSupplies...................................1-1

Cooling.........................................1-1

RFOutputSystem.................................1-1

OptionalEquipment...............................1-1

BlockDiagram...................................1-1

Specifications....................................1-1

Section II

Installation

Introduction......................................2-1

TestEquipmentRequirementPlanning..............2-1

MechanicalInstallationPlanning.....................2-1

SpaceRequirements.............................2-1

ApproximateShippingWeights....................2-1

RFSystemLayout ..............................2-1

AirSystem.....................................2-1

ElectricalInstallationPlanning.......................2-1

PowerRequirements.............................2-1

CircuitBreakerSelection.........................2-1

ACmainsDisconnectLocation....................2-2

UnloadingandUnpacking..........................2-2

EquipmentRequiredforUnloading.................2-2

Unpacking,EquipmentInventoryandInspection......2-2

FactoryTestDataSheets.........................2-3

CabinetPlacementandLeveling...................2-3

ElectricalInstallation ..............................2-4

Grounding .....................................2-4

PrimaryWiring.................................2-4

SettingTransformersTaps........................2-5

Input Signals ...................................2-5

SetupJumpers..................................2-5

BackupBattery.................................2-5

RFOutputCoaxConnections......................2-5

Interlocks......................................2-5

TransmitterCheckOut.............................2-5

Pre-turnonchecks ..............................2-5

InitialTurn-onSequence .........................2-5

Module Installation..............................2-5

ControlSystemCheckOut........................2-6

InitialApplicationofRFPower....................2-6

Visual.....................................2-6

Aural.........................................2-6

RemoteControlInputandOutput....................2-6

CommandIn1A12J21...........................2-6

1A12J22:StatusOutputs .........................2-6

StatusFunctions1A12J22 ........................2-7

AnalogOutputs1A12J23.........................2-7

Section III

Operation

Introduction......................................3-1

ControlsAndIndicators............................3-1

LocalTurn-onandTurn-off........................ 3-1

VideoControlledOperation........................ 3-1

RemoteControl/ExtendedOperation................. 3-1

Section IV

Theory of Operation

Introduction ..................................... 4-1

SystemOverview................................. 4-1

Exciter,MeterandControlBoard.................... 4-1

A/D&Displays................................ 4-1

BarGraphDisplay.............................. 4-1

AnalogMultiplexers ............................ 4-1

MeterSelector................................. 4-1

LossOfVideoDelayDetector.................... 4-2

Override/NormalSelection....................... 4-2

ClockCircuits................................. 4-2

BATTERY (BAT) SUPPLY VOLTAGE............ 4-2

VisualPowerControl ........................... 4-2

AuralPowerControl............................ 4-2

PowerUpReset................................ 4-2

JP2&JP3..................................... 4-2

FREQUNLOCK............................... 4-2

VIS_CLK_GATE U18 & AUR_CLK_GATE U19

FunctionalDescriptions......................... 4-3

METER_CLK_GATE U20 Functional De-

scriptions................................. 4-3

METER_SEL U17 Functional Descriptions.......... 4-3

VIS_UP/DWN_PWR_CTRLU26&U27....... 4-3

VisualDACU25............................... 4-3

VisualFoldbackControl......................... 4-3

AUR_UP/DWN_PWR_CTRLU29&U30.......... 4-3

InterfaceLogicModule............................ 4-4

PeakDetectors................................. 4-4

FoldbackCircuits............................... 4-4

HighVSWR................................... 4-5

Command Input Logic PAL U8 (917-2321-004)...... 4-5

XMTRCTRLPALU15..................... 4-5

Fault Encoder U19 (917-2321-008) ............ 4-5

50VOK .................................. 4-5

AirFault.................................. 4-6

ACBREAKERS................................. 4-6

MAINBREAKER.............................. 4-6

ACCONTROLBREAKER...................... 4-6

LOGICSUPPLYBREAKER..................... 4-6

POWER MODULE 1A11.......................... 4-6

POWER SUPPLY FAULT DISPLAY and INTER-

FACE1A11A6................................ 4-6

50VSUPPLIES1A11A1and1A11A5 ............. 4-7

LOGICSUPPLY1A11A3....................... 4-7

Section V

Maintenance and Alignments

Introduction ..................................... 5-1

StationRecords.................................. 5-1

Transmitter Logbook ............................ 5-1

MaintenanceLogbook........................... 5-1

SafetyPrecautions.............................. 5-1

PreventiveMaintenance ........................... 5-1

AirFilterMaintenance .......................... 5-1

iv 888-2457-001 Rev. B: 7/25/02

WARN9ING: Disconnect primary power prior to servicing.

MOV’S....................................... 5-2

Semiconductors................................ 5-2

Capacitors................................. 5-2

FixedResistors............................. 5-2

Transformers .............................. 5-2

Relays.................................... 5-2

PerformanceChecks.............................. 5-2

Adjustments..................................... 5-2

RFPowerMeasurements .......................... 5-2

Through-LineMeters............................ 5-2

Visual Peak-sync to Average Power Conversion For-

mulas........................................ 5-3

TransmitterMeteringandControlCalibration.......... 5-3

Power Supply Meter Calibration................... 5-3

PSVOLTSCalibration:...................... 5-3

PSCURRENTCalibration................... 5-3

ExciterRFOutputMeterCalibration............... 5-3

ExciterVisualPowerCalibration.............. 5-3

ExciterAuralPowerCalibration............... 5-3

TransmitterRFOutputMeterCalibration........... 5-3

Transmitter Visual Forward Power Calibra-

tion...................................... 5-4

Transmitter Visual Reflected Power Calibra-

tion...................................... 5-4

TransmitterAuralForwardPowerCalibration.... 5-4

Transmitter Aural Reflected Power Calibra-

tion...................................... 5-4

VSWRFaultAndFoldbackAdjustments ........... 5-4

InitialSetupforAdjustment.................. 5-4

VisualHighVSWRAdjustment............... 5-4

VisualVSWRFoldbackAdjustment ........... 5-4

AURALHIGHVSWRAdjustment............ 5-4

AuralVSWRFoldbackAdjustment............ 5-4

TransmitterAGCAdjustment....................... 5-4

VisualAGC: .................................. 5-4

VisualPowerReduction......................... 5-5

AuralAGC.................................... 5-5

AuralPowerReduction.......................... 5-5

Component Replacement On Circuit Boards........... 5-5

Section VI

Troubleshooting

Introduction..................................... 6-1

Troubleshooting Assistance......................... 6-1

Returns......................................... 6-1

Section VII

Parts List

Section VIII

Parts List

Appendix A

RF Amplifier Modules, Platinum Series

GeneralInformation .............................. A-1

Factory Module Repair .......................... A-1

LocalModuleRepair............................ A-1

RFAmplifierModulesTheoryofOperation........... A-1

Driver Module, Low Band........................A-2

Driver Module, High Band .......................A-2

PAModule....................................A-4

RF Quarter Modules.............................A-4

Low Band Quarter Module .......................A-4

HighBandQuarterModule.......................A-5

Quarter Module Bias ............................A-5

Protection,ControlandMonitorSubsystem..........A-5

Module Status LEDs ............................A-6

RedLEDFaultBlinkCodes..................A-6

Module Troubleshooting ...........................A-6

Platinum™ TV Module Test Fixture (992-8556-002) . . A-7

Troubleshooting Based on Module Swapping ........A-7

Troubleshooting Based on Module Blink Codes ......A-7

IsolatingOtherFailures.........................A-10

LocatingFailedRFFETs........................A-11

DCResistanceTest.........................A-11

IdleCurrentTest...........................A-11

PartsReplacementProcedures......................A-12

SolderingPrecautions...........................A-12

Quarter Module Replacement ....................A-13

RFFETReplacement...........................A-13

TestingandReplacingIsolationResistors ..........A-14

PassFETReplacement..........................A-14

ChipCapReplacement .........................A-15

TestProcedureSolidStateTVModules..............A-15

Pre-operationalChecks .........................A-15

InitialPowerUp...........................A-15

IdleCurrentCheck.........................A-15

Over/UnderVoltageCheck..................A-15

RFTesting...................................A-15

ApplicationofDrive........................A-15

GainCheck...............................A-15

Alternate method for measurement under

program conditions......................A-16

ISOVoltsCheck...........................A-16

OverdriveCheck...........................A-16

VSWRCheck.............................A-16

Appendix B

Air Conditioning Considerations

Air Conditioning ................................. B-1

HeatLoadEstimateGuide..........................B-1

Appendix C

Surge and Lightning Protection and Grounding Consid-

erations

SurgeandLightningProtection......................C-1

System Grounding ................................ C-1

Ground Wires..................................C-1

ACGround.................................... C-1

DCGround.................................... C-2

Earth Ground .................................. C-2

RF Ground ....................................C-2

Rev. B: 7/25/02 888-2457-001 v

WARN9ING: Disconnect primary power prior to servicing.

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Section I

Introduction/Specifications

1.1 Introduction

1.1.1 General Description

Platinum™ Series The HT EL 2000 watt television transmitter

is an externally diplexed transmitter available in CCIR systems

forM,D/K,B,I,andK.

The transmitter consists of 5 RF amplifier modules, coolingfans,

50 voltpowersupplies, control interfacetray, logic powersupply

and an exciter. The exciter includes the transmitter control panel.

Transmitters operate on a 208-240 volt single phase 50 or 60

Hertz. The transmitter assemblies all are mounted in a single

cabinet 183 cm (72 inches) high.

1.2 Control and Monitoring

Transmitters are designed for local, video present control, or

remote/extended operation. VSWR foldback is used to protect

the transmitter RF system. Over temperature protection of RF

modules and module power supplies is standard.

1.3 Signal Flow Through the System

Refer to transmitter block diagram Figure 1-1.

The visual exciter uses IF modulation with pre-correction at

video and IF. The visual signal is amplified by a driver and three

PA modules.

The aural exciter modulates audio baseband and subcarrier in-

puts at aural IF carrier. Optional IF group delay correction is

available for a Notch Diplexer and aural linearization for dual

carrier systems. The aural signal is amplified by a RF driver

amplifier module.

1.4 RF Amplifier Modules

Like aural and visual modules are interchangeable and have

overdrive, over/undervoltage, power unbalance, VSWR, and

overtemperature protection. The modules may be repaired in the

field at the quarter module or component level.

1.5 Power Supplies

The exciter and interface logic utilize linear regulator supplies.

The RF module power comes from power factor corrected

switching supplies in the power module assembly.

1.6 Cooling

The main coolingairintakeis through the rear door andexhausts

out the top and right side. There are five supply and five exhaust

fans for module cooling. Two other fans are used for heat pipe

cooling.

Removing one module will not affect air flow to other modules.

Each power supply has a fan to draw air from the front of the

transmitter.

1.7 RF Output System

Various diplexing systems are used as the system requires. Har-

monic and imagefrequency color subcarrier filtersarepartofthe

system.

1.8 Optional Equipment

Single or dual cavity Notch Diplexer

Multichannelsound:NICAM,IRTDualCarrierandBTSC

Precision Offset

Combined transmitters

Main/alternate transmitters

Second exciter with automatic exciter switcher

Power measurement wattmeter

RF module test fixture

Spare parts, semiconductors and board assemblies

Spare RF modules

Transmitter Remote Control System

1.9 Block Diagram

Figure 1-1 is a block diagram of the HT EL2000LS/HS.

1.10 Specifications

Table 1-1 lists the specificaitons for the HT EL2000LS/HS.

NOTE

Specifications subject to change without notice.

888-2457-001 1-1

WARNING: Disconnect primary power prior to servicing.

Figure 1-1. HT EL2000 LS/HS Block Diagram

Platinum™ Series

1-2 888-2457-001

WARNING: Disconnect primary power prior to servicing.

Table 1-1. Specifications

Section I - Introduction/Specifications

888-2457-001 1-3

WARNING: Disconnect primary power prior to servicing.

Electrical Specifications HT EL2000LS/HS

Visual Specifications:

Power Output 2 kW Peak of sync

Measured at output of optional diplexer

Frequency Range HT EL2000LS, 47-88 MHz

HT EL2000HS, 170-230 MHz

Systems CCIR-M,N,B,D/K,K1,I

Color Formats NTSC, PAL, SECAM

RF Output:

Impedance 50 ohms.

Connector 1 5/8" EIA unflanged

Video Input:

Impedance 75 Ohm, 32 dB return loss up to 5.0 MHz

Level 0.5 - 2.0 Volts, peak to peak

Visual Modulation Capability 0%

Measured using synchronous detector.

Frequency Response vs. Brightness 0.75 dB or better

Measured using a 20% amplitude swept video modulation with pedestal set at

10%, 50% and 90% APL. All percentages relative to a blanking to white

excursion.

Differential Gain 3% or better

Measured with a 5-step staircase signal 0 to 100 IRE units and color subcarrier

of 20 IRE units peak to peak.

Differential Phase 1 or better

Measured with 5-step staircase signal as in Differential Gain.

Incidental Carrier Phase Modulation 1.5 or better

Carrier phase variation from reference white to sync tip relative to blanking.

Luminance Non-linearity 1.0 dB or better

Measured with a 5-step staircase signal. Test Signal #3 CCIR Rec. 421-3.

Equivalent Envelope Delay Compliant with CCIR system

2T Pulse K-Factor 1.5% Maximum

20T Pulse 3% Maximum baseline disturbance

Signal-to-Noise -55 dB RMS or better

Total random and periodic noise unweighted, relative to peak sync.

Variation of Output 2% or less

Total peak-to-peak variation of peak sync voltage during one field, using a field

square wave test signal.

Regulation of Output Power 3% or less

Variation of peak output power with a change in average picture level from

black to white (0% to 100%).

Carrier Frequency Stability 150 Hz per month

After 60 day initial aging.

(2 Hz, with optional precise frequency control)

Harmonic Radiation -70 dB RMS, relative to peak vision power.

Aural Specifications:

Table 1-1. Specifications

Platinum™ Series

1-4 888-2457-001

WARNING: Disconnect primary power prior to servicing.

Power Output 200 W

Measured at output of optional notch diplexer.

RF Output:

Impedance 50 Ohms

Connector Type N, Female

Audio Inputs:

1. Monaural

Level 0 to +16 dBm, 25 kHz deviation

Impedance 600 Ohms balanced

Response 0.5 dB, 30 Hz-15 kHz

Pre-emphasis Flat / 50uS / 75uS, selectable

2. Subcarrier (2 inputs)

Level 1 volt RMS, adjustable.

Impedance 75 Ohms, unbalanced

Response 0.5 dB, 20 kHz-110 kHz.

3. Wideband (composite)

Level 1 volt RMS nominal for 75 kHz deviation

Impedance 75 Ohms, unbalanced

Response 0.1 dB, 50 Hz to 50 kHz

0.5 dB, 50 kHz to 110 kHz

Monaural Performance:

Frequency Response 0.5 dB, 30 Hz to 15 kHz

Relative to standard 75S or 50S pre-emphasis curve.

Harmonic Distortion 0.2% or less

Measured at 25 kHz deviation, 30 Hz to 15 kHz after de-emphasis.

FM Signal-to-Noise 60 dB RMS or better

Relative to 25 kHz deviation.

AM Signal-to-Noise 55 dB RMS or better

Relative to 100% amplitude modulation.

AM Synchronous Noise 40 dB RMS or better

Relative to 100% amplitude modulation, measured before optional diplexer.

Wideband Composite Performance: (At 75kHz deviation)

Harmonic Distortion 0.25% or less, 50 Hz to 15 kHz

0.75% or less, 15 kHz to 50 kHz

Distortion (IMD) 0.5% or less

SMPTE 4:1 test signal.

FM Signal-to-Noise 70 dB RMS or better

Measured after de-emphasis.

AM Signal-to-Noise 55 dB RMS or better

Relative to 100% amplitude modulation.

AM Synchronous Noise 40 dB RMS or better

Relative to 100% amplitude modulation.

Stereo Separation 45 dB or better, 50 Hz to 15 kHz

Equivalent mode (uncompanded).

Crosstalk 50 dB or better

Stereo or Main channel into SAP.

Mechanical, Environment, Power

Physical Dimensions:

Table 1-1. Specifications

Continued

Section I - Introduction/Specifications

888-2457-001 1-5

WARNING: Disconnect primary power prior to servicing.

Width 26" (66 cm)

Height 72" (183 cm)

Depth 35" (89 cm)

Weight 800 lbs (363 kg)

Environmental Requirements:

Operating Temp. Range 0 to +45 degrees C

(+32 to +113 degrees F)

Maximum temperature rating decreases 2 degrees C per 1,000 foot altitude

above mean sea level.

Humidity Range 0 to 95% Relative Humidity

Maximum Altitude 10,000 feet (2,286 meters)

Power Requirements:

Input 208/240 volts 11 volts, single phase, 50/60 Hz

Regulation 10%

Air System Requirements:

Inlet Air Openings Rear door and front power module, with filters

Exhaust Air Openings Amplifier cabinet top, 30" x 8" and amplifier cabinet right rear side (two areas),

6" x 18" and 9" x 11".

Exhaust Temperature 10 degrees C temperature rise above inlet

Allowable Back Pressure 0.05" of water at each cabinet exhaust stack

Acoustic Noise 65dB, @ 3 feet in front of center of transmitter (“A” weighting scale)

Inlet/Exhaust Air Flow 1225 cfm

Table 1-1. Specifications

Continued

Platinum™ Series

1-6 888-2457-001

WARNING: Disconnect primary power prior to servicing.

Section II

Installation

2.1 Introduction

This section contains information necessary for installation

planning, installation, and initial checkout procedures on Plati-

num™ Series HT EL2000LS/HS television transmitters. The

informationinthissectionisintendedtobeusedonlyasa

general guideline in planning the installation. Since all installa-

tions differ in some respects, and in order to conform to local

building and electrical codes, the information contained must be

adapted for each installation.

2.1.1

Test Equipment Requirement Planning

See Table 2-1 for a list of recommended test equipment.

2.2 Mechanical Installation Planning

2.2.1 Space Requirements

(Refer to Transmitter Outline drawing: 843-5285-110)

Planning for the transmitter room should allow space for pro-

gram input, monitoring, remote control, and test equipment as

well as the transmitter. Additional area may also be required for

tower lighting, HVAC (heating, ventilation and air-condition-

ing) equipment, storage, and a workbench. To allow for servic-

ing the transmitter, a minimum clearance of 3 feet (92 cm) in

front of and 20 inches (51 cm.) behind the cabinet is recom-

mended.

The Transmitter Outline drawing, shows the air exhaust hole

pattern locations,donotobstruct these exhaustareas.Leaveside

exhaust areas unobstructed for at least 8 inches (20 cm.).

2.2.2

Approximate Shipping Weights

(lb) (kg)

Cabinet 435 198

Exciter 55 25

RF modules each 26 12

Power module 125 57

Be sure to include this information in your planning for the

building and verify that the structure is capable of safely sup-

porting the total weight of the transmitter and peripheral equip-

ment.

2.2.3

RF System Layout

The 1 5/8 EIA unflanged visual RF output and the N connector

aural output are onthe top of thecabinet.Adaptersarefurnished

where needed to connect RF coax cables to 1 5/8 EIA compo-

nents. The outline drawings of typical RF notch diplexers and

harmonic filters are included. Use the block diagrams and

component outline drawings (Fig 2-2 through 2-11) to plan the

installation for the site requirements. Locate the transmitter

close to the diplexertominimizetheinterconnectionlinelosses.

A support system should be installed so that the RF components

are completely supported, to minimize theweight carried bythe

output connectors. This will prevent possible damage to com-

ponents and connectors. Notch diplexers are generally supplied

in a frame which rests on or is bolted to the floor.

Directional couplers for metering are in the transmitter cabinet.

Optional directional couplers for monitoring are on the block

diagram and should be ordered with the transmitter. Be sure all

components necessary for installation are available on site.

2.2.4

Air System

Minimum transmitter air cooling requirements are 1200 cubic

feet per minute (34 cubic meters per minute). Additional flush-

ing air is recommended for the removal of heat from any

equipment surrounding the transmitter. A good guideline is to

keepinputairnogreaterthan5°Caboveambient.Themaximum

transmitter operating temperature is 45°Catsealevel(derate

2°C for each 1000 feet (300 meters) above sea level. Hot air

rises, one approach would be to use exhaust duct(s) or louvers

at the highest point of the room and use a supply fan and filter

frame to keep the room at a positive pressure.

Appendix B contains information useful to those intending to

use air conditioning equipment to control transmitter building

temperature.

2.3 Electrical Installation Planning

Each country establishes standards for AC power systems. The

national and local applicablestandard for the installation should

be followed.

See Appendix C for information about lightning and surge

protection.

2.3.1

Power Requirements

The transmitter is designed to operate from 208 to 240 volts, 50

or 60 Hz, single phase. If voltage variations in excess of

+10%

areanticipated,itisrecommendedthatthetransmitterACmains

be equipped with automatic voltage regulators capable of cor-

recting the primary voltage.

All control wiring and signal inputs are located at the I/O panel

in the cabinet. Additional access is provided in the cabinet floor

for AC wiring only. AC power to the transmitter should be run

in metallic conduit, connected to earth ground for safety and to

provide shielding against interference. The power wiring must

be terminated in a power distribution panel, this panel must also

beconnectedto earthground.Atransmitter cabinetgroundstrap

connection is located at the lower rear edge.

2.3.2

Circuit Breaker Selection

The transmitter requires a relatively stable source of input

power. For this reason, the primary power for the transmitter

should originate at the main power distribution system and

remain isolated from other electrical distributions.

888-2457-001 2-1

WARNING: Disconnect primary power prior to servicing.

A short-duration surge, due to transformer inrush current, will

occur at turn-on or during a short AC powerloss. This surge can

be as high as 400 amps. During this surge,the line voltage at the

cabinetmustnotdropbelow80%ofthe ratedlinevoltage.Select

a 40 amp breaker or fuse for the transmitter using the above

inrush current information.

2.3.3

AC mains Disconnect Location

The circuit breaker panel should be located near the transmitter

in a well lighted area. As a safety precaution, controls for

disconnecting the main power service supplying the transmitter

must be convenient to the operator and maintenance personnel.

Breakers must be clearly labeled. Provisions for emergency

lighting should be made.

2.4 Unloading and Unpacking

2.4.1 Equipment Required for Unloading

Examine the weights listed on the Transmitter Outline drawing

for guidance on the equipment needed. Note: The notch

diplexer, if used, will be the heaviest.

2.4.2

Unpacking, Equipment Inventory and Inspection

A“check-off”boxisavailabletohelp theinstallertrackthesteps

that have been completed.

Whenthetransmitterisdeliveredtothesite,theshipmentshould

be inspected and inventoried before installation is begun. This

section provides information to assist unpacking and inventory.

Locate the packing check list when the shipment arrives.

Each transmitter shipment will be accompanied by a packing

check list identifying which equipment is packed in the various

crates and boxes.

LOCATED PACKING CHECK LIST

The contents of the shipment should be inventoried with the

packing list. Carefully unpack the unit and perform a visual

inspection to determine if any apparent damage has been in-

curred during shipment. Retain all shipping materials until it has

been determined that all items on the list are on site and no

damageoccurredduring shipment. Itmaybenecessaryto search

packing material for parts initially missed during unpacking.

The carrier may also wish to examine the packing material.

If the contents are incomplete, or if the unit is damaged electri-

cally or mechanically, notify the Harris Customer Service De-

partment by phone at 217-222-8200, FAX at 217-222-9443 or

at the following address:

Harris Corporation,

Broadcast Division

P.O. Box 4290

Quincy, Il 62305

Attn. Customer Service Department

INVENTORY OF EQUIPMENT COMPLETED

The equipment becomes the property of the customer when the

unit is delivered to the carrier. Claims for damaged equipment

Vestigial Sideband Demodulator Tektronix 1450/1350 or

Equivalent

Option 1 37 MHz IF, NTSC CCIR-M (USA and others)

Option 2 38.9 MHz IF, CCIR-G, PAL

Tektronix Sideband Analyzer

Consisting of:

1405 Sideband Adaptor

2710, 490, or 2750 Spectrum Analyzer

Tektronix 1910 Signal Generator or equivalent

Tektronix 1780 Video Measurement Set

Aural Stereo Generator, Orban 8182A or equivalent

Aural Demodulator Tektronix 751, TFT-850, or equivalent for

stereo

Time & Frequency Technology 701, 702, or equivalent for

monaural

A method of measuring transmitter frequency with two

sources. (Frequency Counter, Frequency Counter on De-

modulator, Outside Frequency Measuring Service.)

Audio Oscillator and Distortion Analyzer (Sound Technology

1710A or equivalent).

Asaca 201-1 Envelope Delay Measuring Set

Scope Camera

RF Bridge, Ealge RLB-150, or precision directional coupler

700-1289-000

UHF RF Notch Filter, Eagle Model TNF-1 484-0300-000

Various RF Adaptors and Connectors

3-1/8 inch to type “N” adapter - 620-0008-000

Type N to BNC male to female - 620-0128-000

Type N to BNC female to male - 620-0547-000

Type BNC plug to Subminiax Plug

Type BNC plug to Subminiax Jack

Type BNC barrel - 620-0604-000

Type BNC to SMB (push-on) - 620-0628-000

TNC-BNC - 620-2821-000

Bird Model 43 Wattmeter with elements from 1W to 1000W

Adaptor 1 5/8" coax to N connector

Manometer Dwyer model 40-1 (range0.1-0-1.0"WC)orequal

Tee kit Dwyer A-604T or equal

Fluke Multimeter and Style C Current Probe

Table 2-1. Recommended Test Equipment

Platinum™ Series

2-2 888-2457-001

WARNING: Disconnect primary power prior to servicing.

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Harris Platinum HT EL 2000LS, Platinum HT EL 2000HS Technical Manual

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