EuroTel ETL0W474G Operating And Technical Manual

Brand: EuroTel

Model: ETL0W474G

Type: Operating And Technical Manual

Rev. 004 ETL0W474G

Operating and Technical Manual

Operating and Technical ManualOperating and Technical Manual

Operating and Technical Manual

ETL0W474G

ETL0W474GETL0W474G

ETL0W474G

750 W (RMS) DTV / 1800 W ATV

750 W (RMS) DTV / 1800 W ATV750 W (RMS) DTV / 1800 W ATV

750 W (RMS) DTV / 1800 W ATV

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER

EuroTel S.p.A.

Via Martiri della Libertà, 4

20035 Lissone (MI), Italy

Tel. +39 039 24361 – Fax +39 039 2436222

E-Mail [email protected] – Web http://www.eurotel.it

Oct 2013 CMAN0W474G Page 1

ETL0W474G Rev. 004

Page 2 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

Operating and Technical Manual

Operating and Technical ManualOperating and Technical Manual

Operating and Technical Manual

750 W (RMS) DTV / 1800 W ATV

750 W (RMS) DTV / 1800 W ATV750 W (RMS) DTV / 1800 W ATV

750 W (RMS) DTV / 1800 W ATV

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER ETL0W474G

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER ETL0W474GUHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER ETL0W474G

UHF B IV-V RF LIQUID-COOLED POWER AMPLIFIER ETL0W474G

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

Section A- GENERAL INFORMATION..............................................................................................5

I - AMENDMENT RECORD SHEET............................................................................................5

II - APPROVAL RECORD SHEET................................................................................................5

Section B- SAFETY INSTRUCTIONS...............................................................................................6

1 ) GENERAL INSTRUCTIONS...........................................................................................6

2 ) A.C. LINE HAZARDS....................................................................................................6

3 ) R.F. HAZARDS.............................................................................................................7

4 ) FIRE RISK....................................................................................................................7

5 ) HANDLING BERYLLIUM OXIDE CERAMICS..................................................................7

6 ) FIRST AID PROCEDURES IN CASE OF ELECTRIC SHOCK..............................................7

7 ) EMERGENCY RESUSCITATION: EXPIRED AIR METHOD................................................8

8 ) TREATMENT FOR BURNS.............................................................................................8

Section C- SYSTEM DESCRIPTION AND TECHNICAL SPECIFICATIONS...................................9

I - INTRODUCTION................................................................................................................9

II - COMPOSITION OF RF AMPLIFIER SERIES ETL0W474G.......................................................9

III - TECHNICAL SPECIFICATIONS...........................................................................................10

1 ) General......................................................................................................................10

2 ) Input Parameters.........................................................................................................10

3 ) Output Parameters......................................................................................................10

4 ) Dimensions and Weight..............................................................................................10

IV - FUNCTIONAL DESCRIPTION.............................................................................................11

1 ) Theory of operation of UHF RF Amplifier ETL0W474G series.........................................11

Section D- INSTALLATION AND OPERATING INFORMATION.....................................................13

I - INSTALLATION...................................................................................................................13

1 ) Series ETL0W474G R. F. Amplifier: mounting procedure...............................................13

2 ) Other connections.......................................................................................................13

3 ) Series ETL0W474G: front panel controls, displays & connectors ...................................14

4 ) Series ETL0W474G: rear panel connectors...................................................................16

5 ) Enable IN/OUT DIN socket..........................................................................................18

6 ) ALARMS OUT socket...................................................................................................18

7 ) SERIAL DATA RS-485 socket........................................................................................19

8 ) SERIAL PORT RS-232 socket.........................................................................................19

9 ) E-LINK SERIAL NETWORK socket..................................................................................19

10 ) Data Communication................................................................................................20

Oct 2013 CMAN0W474G Page 3

ETL0W474G Rev. 004

II - OPERATING PROCEDURES.................................................................................................21

1 ) First time operation of series ETL0W474G....................................................................21

2 ) ETL0W474G: changing the M.L.C. Nominal value........................................................22

3 ) RF Amplifier series ETL0W474G: in case of difficulty.....................................................23

III - SERIES ETL0W474G - MULTI-FUNCTION METERING DISPLAY............................................24

1 ) Alphanumeric LCD display description.........................................................................24

2 ) First level menu description..........................................................................................25

3 ) Second level menu description.....................................................................................28

4 ) Alarm and Warning Events..........................................................................................32

5 ) Warning LED..............................................................................................................33

Section E- LAYOUT ASSEMBLY AND CIRCUIT DIAGRAMS.........................................................35

I - MAINFRAME.......................................................................................................................35

1 ) ETL0W474G Layout of R.F. parts of Amplifier...............................................................35

TABLE OF ILLUSTRATIONS

TABLE OF ILLUSTRATIONSTABLE OF ILLUSTRATIONS

TABLE OF ILLUSTRATIONS

Figure 1: UHF TV RF Power Amplifier series ETL0W474G, blocks diagram...............................12

Figure 2: Front panel of series ETLW0474G TV RF Amplifier......................................................15

Figure 3: Rear panel of series ETL0W474G TV RF Amplifier........................................................17

Figure 4: Enable socket and connector..........................................................................................18

Figure 5: ALARMS OUT socket........................................................................................................18

Figure 6: Serial DataRS485 in-out socket......................................................................................19

Figure 7: Serial Data Com in-out socket.........................................................................................19

Figure 8: E-LINK SERIAL NETWORK in-out socket.......................................................................19

Figure 9: Example of PC's display for RS-232 connection...........................................................32

Page 4 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

Section A-

Section A-Section A-

Section A-GENERAL INFORMATION

GENERAL INFORMATIONGENERAL INFORMATION

GENERAL INFORMATION

I -

I - I -

I - AMENDMENT RECORD SHEET

AMENDMENT RECORD SHEETAMENDMENT RECORD SHEET

AMENDMENT RECORD SHEET

When an amendment to this publication is incorporated, the record below is to be completed and

initialed.

Release

ReleaseRelease

Release

Language

LanguageLanguage

Language

DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

AUTHORITY

AUTHORITYAUTHORITY

AUTHORITY

DATE

DATEDATE

DATE

II -

II - II -

II - APPROVAL RECORD SHEET

APPROVAL RECORD SHEETAPPROVAL RECORD SHEET

APPROVAL RECORD SHEET

When an approval to this publication is incorporated, the record below is to be completed.

Release

ReleaseRelease

Release Signature

SignatureSignature

Signature AUTHORITY

AUTHORITYAUTHORITY

AUTHORITY DATE

DATEDATE

DATE

The information contained herein is the property of EUROTEL S.p.A. and is supplied without liability

The information contained herein is the property of EUROTEL S.p.A. and is supplied without liability The information contained herein is the property of EUROTEL S.p.A. and is supplied without liability

The information contained herein is the property of EUROTEL S.p.A. and is supplied without liability

for errors or omissions and no part may be reproduced, used or disclosed, except as authorized by

for errors or omissions and no part may be reproduced, used or disclosed, except as authorized by for errors or omissions and no part may be reproduced, used or disclosed, except as authorized by

for errors or omissions and no part may be reproduced, used or disclosed, except as authorized by

contract or other written permission. The copyright and the foregoing restriction on reproduction, use

contract or other written permission. The copyright and the foregoing restriction on reproduction, use contract or other written permission. The copyright and the foregoing restriction on reproduction, use

contract or other written permission. The copyright and the foregoing restriction on reproduction, use

and disclosure extends to all media in which this information may be embodied, including magnetic

and disclosure extends to all media in which this information may be embodied, including magnetic and disclosure extends to all media in which this information may be embodied, including magnetic

and disclosure extends to all media in which this information may be embodied, including magnetic

or electronic storage, etc.

or electronic storage, etc.or electronic storage, etc.

or electronic storage, etc.

Oct 2013 CMAN0W474G Page 5

ETL0W474G Rev. 004

Section B-

Section B-Section B-

Section B-SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONSSAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS

1 )

1 ) 1 )

1 ) GENERAL INSTRUCTIONS

GENERAL INSTRUCTIONSGENERAL INSTRUCTIONS

GENERAL INSTRUCTIONS

Observe the following safety precautions when handling this unit. This equipment operates with

dangerous voltages and currents.

•All electrical installations and connections are to be carried out only by skilled personnel.

•When outfitting operating rooms as well as setting up and operating electrical equipment follow the

relevant national and international safety instructions and regulation.

•When setting up the rack observe the relevant safety precautions for the prevention of accidents.

These precautions especially relate to: danger of getting crushed when working with loads, danger

of falling off ladders while working, danger of getting hurt or injured when lifting heavy loads.

•Always disconnect power before opening covers or removing any part or module of this amplifier

unit.

•Prior to checking out or working on the switch mode supply, disconnect all the R.F. power

amplifiers.

•Some of the R.F. power amplifier transistors are encased in Beryllium Oxide (BeO). This substance

is harmless as is, but becomes very dangerous if ground to a powder. These devices, once failed,

cannot be disposed of by normal means and special procedures of disposal must be observed.

•In any case, but especially when the R.F. Power Amplifier is operating,

In any case, but especially when the R.F. Power Amplifier is operating, In any case, but especially when the R.F. Power Amplifier is operating,

In any case, but especially when the R.F. Power Amplifier is operating, do not attempt

do not attemptdo not attempt

do not attempt to remove

to remove to remove

to remove

and then re-insert the rear panel coaxial interconnecting cables of the EXCITER. Although

and then re-insert the rear panel coaxial interconnecting cables of the EXCITER. Although and then re-insert the rear panel coaxial interconnecting cables of the EXCITER. Although

and then re-insert the rear panel coaxial interconnecting cables of the EXCITER. Although

suitable protection circuitry is in place, sudden loss and re-application of R.F. drive causes

suitable protection circuitry is in place, sudden loss and re-application of R.F. drive causes suitable protection circuitry is in place, sudden loss and re-application of R.F. drive causes

suitable protection circuitry is in place, sudden loss and re-application of R.F. drive causes

transients that may damage one or more R.F. amplification stages.

transients that may damage one or more R.F. amplification stages.transients that may damage one or more R.F. amplification stages.

transients that may damage one or more R.F. amplification stages.

2 )

2 ) 2 )

2 ) A.C. LINE HAZARDS

A.C. LINE HAZARDSA.C. LINE HAZARDS

A.C. LINE HAZARDS

Voltage values Vrms > 30V A.C. or V > 60V D.C. are potential hazard. Take appropriate measures to

avoid any danger when working with hazardous voltages.

Never work on live parts. It is only permissible to work on live parts under exceptional circumstance and

if special safety precautions have been taken.

Power Supply

Power SupplyPower Supply

Power Supply

Prior to connecting power supply ensure that the A.C. line data on the product matches the data of the

available supply. Fuses or other devices in the supply circuit must guarantee overload and short-circuit

protection.

The user is responsible for correct fuse protection.

Page 6 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

3 )

3 ) 3 )

3 ) R.F. HAZARDS

R.F. HAZARDSR.F. HAZARDS

R.F. HAZARDS

In the amplifier, high-energy R.F. circuits are fed through common R.F. connectors (eg N). Depending

on the output power, the amplifier outputs are fitted with screw-in R.F. lines or waveguides.

CAUTION!

CAUTION!CAUTION!

CAUTION!

1. Never unscrew R.F. lines when the amplifier is in operation.

2. Never open the module when the amplifier is in operation.

If R.F. lines which are in operation are disconnected, electric arcs may be generated and cause burns

and eye injuries.

3. Never put the amplifier into operation when R.F. lines are open-circuited.

4 )

4 ) 4 )

4 ) FIRE RISK

FIRE RISKFIRE RISK

FIRE RISK

There is a risk of fire presented by any live electrical if there is sufficient energy conversion which is the

case with radio transmitters.

Preventive measures on-site can reduce fire hazards to a large extent and effectively reduce the fire

spreading.

CAUTION!

CAUTION!CAUTION!

CAUTION!

•On installing the transmitter, the user shall ensure that no combustible materials are store ro fitted

beneath or above the cable entry.

Firefighting must be performed only with special equipment (eg breathing apparatus with air bottle) in

order to avoid inhalation of harmful fumes, gases and dust produced by combustion.

5 )

5 ) 5 )

5 ) HANDLING BERYLLIUM OXIDE CERAMICS

HANDLING BERYLLIUM OXIDE CERAMICSHANDLING BERYLLIUM OXIDE CERAMICS

HANDLING BERYLLIUM OXIDE CERAMICS

Parts containing BeO ceramics are not a health hazard provided that safety regulations are followed.

CAUTION!

CAUTION!CAUTION!

CAUTION!

Parts made from BeO ceramics shall not be machined, scored, crushed, broken, heated nor

sandblasted. BeO dust passes through all common filtering system including conventional apparatus

filters.

Parts made from BeO ceramics shall not be opened nor destroyed.

6 )

6 ) 6 )

6 ) FIRST AID PROCEDURES IN CASE OF ELECTRIC SHOCK

FIRST AID PROCEDURES IN CASE OF ELECTRIC SHOCKFIRST AID PROCEDURES IN CASE OF ELECTRIC SHOCK

FIRST AID PROCEDURES IN CASE OF ELECTRIC SHOCK

DO NOT TOUCH THE VICTIM WITH YOUR BARE HANDS UNTIL THE ELECTRICAL CIRCUIT IS BROKEN.

SWITCH OFF. If this is not possible, PROTECT YOURSELF with DRY insulating material and pull the

victim clear of the conductor. If breathing has stopped indicated by UNCONSCIOUSNESS, LACK OF

RESPIRATORY MOVEMENTS and a “BLUE “ LOOK to CHEEKS, LIPS, EARS and NAILS, START

RESUSCITATION AT ONCE, as directed below.

Oct 2013 CMAN0W474G Page 7

ETL0W474G Rev. 004

7 )

7 ) 7 )

7 ) EMERGENCY RESUSCITATION: EXPIRED AIR METHOD

EMERGENCY RESUSCITATION: EXPIRED AIR METHODEMERGENCY RESUSCITATION: EXPIRED AIR METHOD

EMERGENCY RESUSCITATION: EXPIRED AIR METHOD

If possible, lie the victim on his back, with his head slightly higher than

his feet. Clear the mouth and the throat of any obvious obstruction.

Kneel on one side of the victim, level with his head. LIFT THE JAW AND

TILT THE HEAD BACK AS FAR AS POSSIBLE. Figures 1 and 2.

One of the following may now happen:

One of the following may now happen:One of the following may now happen:

One of the following may now happen:

•Breathing may begin and consciousness return.

•Breathing may begin, but consciousness may NOT RETURN. Turn

the victim on his side and ensure that the airways are kept clear.

•Breathing may begin, but be NOISY, which means that the airways

are not fully clear. Try to clear the airways.

If there is no sign of breathing:

If there is no sign of breathing:If there is no sign of breathing:

If there is no sign of breathing:

•Check that the head is still tilted back.

•Take a deep breath.

•Pinch the victim’s nose and (Figure. 3) blow firmly into his mouth.

As you do, his chest will RISE.

•Turn your head away and take another breath, watching for his

chest to FALL (Figure. 4).

•Start with four quick deep breaths and then continue with one breath every five seconds (i.e. 12

times a minute). This should be continued until the victim revives or a doctor certifies death.

• As consciousness returns, the victim will start to breathe on his own and a “PINK” colour will

replace the “BLUE” look. This is the time to stop resuscitation. Continue to hold his chin up so to

keep the airways clear.In the case of injuries to the mouth

injuries to the mouth injuries to the mouth

injuries to the mouth, it may be necessary to use mouth-to

mouth-to mouth-to

mouth-to

nose

nose nose

nose resuscitation. Seal the victim’s mouth with your cheek and blow firmly into his nose,

proceeding as above. In any case IT IS ESSENTIAL TO COMMENCE RESUSCITATION WITHOUT

DELAY and TO SEND FOR MEDICAL ASSISTANCE IMMEDIATELY.

8 )

8 ) 8 )

8 ) TREATMENT FOR BURNS

TREATMENT FOR BURNSTREATMENT FOR BURNS

TREATMENT FOR BURNS

If the victim is also suffering from burns, then, without hindrance to resuscitation, observe the following:

•DO NOT ATTEMPT TO REMOVE CLOTHING ADHERING TO THE BURNS.

•If possible, alleviate the pain from the burnt part by immersing in cold water.

•If help is available, or as soon as resuscitation is no longer required, the wounds should be covered

with a DRY clean dressing.

•Oil and/or grease, in any form, SHOULD NOT be applied. If severely burnt, get the victim to

hospital immediately.

Page 8 CMAN0W474G Oct 2013

Figure 3

Figure 4

Figure 2

Figure 1

Rev. 004 ETL0W474G

Section C-

Section C-Section C-

Section C-SYSTEM DESCRIPTION AND TECHNICAL

SYSTEM DESCRIPTION AND TECHNICAL SYSTEM DESCRIPTION AND TECHNICAL

SYSTEM DESCRIPTION AND TECHNICAL

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

I -

I - I -

I - INTRODUCTION

INTRODUCTIONINTRODUCTION

INTRODUCTION

•The series ETL0W474G TV RF Amplifier provides linear, class “AB” amplification of RF TV signal in

the standard UHF bands IV & V (470 to 860 MHz).

•ETL0W474G is designed to work both in DTV mode and ATV mode.

•Rated RF output power is set to 750 W (rms) for DTV mode and 1800 W peak sync for ATV mode.

•The use of high efficiency, high power gain LDMOS power transistors allows to obtain highly

efficient amplifier modules as ETL0W474G.

•The ETL0W474G Amplifier is liquid-cooled. A cooling serpentine routed through the heat-sink

optimally cools the power transistors and the switching power supply unit greatly reducing the

temperature of active elements. This involves an efficiently use and a longer lifetime of the system.

•An additional fan is included in the case of ETL0W474G to create an airflow within the case to

dissipate any residual heat.

•ETL0W474G connection to the cooling system is made through quick couplers at the coolant inlet

and outlet.

II -

II - II -

II - COMPOSITION OF RF AMPLIFIER SERIES ETL0W474G

COMPOSITION OF RF AMPLIFIER SERIES ETL0W474G COMPOSITION OF RF AMPLIFIER SERIES ETL0W474G

COMPOSITION OF RF AMPLIFIER SERIES ETL0W474G

•The series ETL0W474G TV R.F. Amplifier consists of one class “AB” driver stage, that feeds four

class “AB” final RF amplifiers combined. Other parts of this Amplifier are: four identical switching

power supply modules for final amplifiers, two identical switching power supply modules for driver

amplifier, a microprocessor controlled metering, alarm and protection module, a directional

coupler. All these parts are assembled into a standard 3 unit 19 inch rack chassis.

•The four R.F. amplifier modules of the output stage are coupled together by means of three

suspended substrate hybrid couplers.

•The R.F. amplifier modules and the switching power supply of the driver are mounted on a heat sink

in the upper part of the cabinet whereas the other switching power supplies are mounted at the

bottom of the cabinet.

•The modules are:

PARTS SUPPLIED IN THE STANDARD CONFIGURATION

PARTS SUPPLIED IN THE STANDARD CONFIGURATIONPARTS SUPPLIED IN THE STANDARD CONFIGURATION

PARTS SUPPLIED IN THE STANDARD CONFIGURATION QTY

QTYQTY

QTY MODEL

MODELMODEL

MODEL

Class “AB” UHF RF driver Amplifier module 1 MOE267

Class “AB” UHF RF final Amplifier module (4 final Amplifiers) 4 MOE272

Switch Mode Power Supply Unit for driver Amplifiers 2 MOE143-3

Switch Mode Power Supply Unit for final Amplifiers 4 MOE104

Metering, alarm and protection module 1 MOE183-7

Oct 2013 CMAN0W474G Page 9

ETL0W474G Rev. 004

III -

III - III -

III - TECHNICAL SPECIFICATIONS

TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS

TECHNICAL SPECIFICATIONS

1 )

1 ) 1 )

1 ) General

GeneralGeneral

General

Primary power 57 V Tri-phase ±15%. Frequency: 47 to 60 Hz

Consumption (channel frequency 800 MHz):

ATV 3800 W @ 50% A.P.L. at 1800 W sync peak power.

DTV 3700 W @ 820 W power out.

Cooling Liquid

Operating temperature range -5°C to +45°C

Storage temperature range -10 to +70°C

Coolant inlet temperature < 55 °C

2 )

2 ) 2 )

2 ) Input Parameters

Input ParametersInput Parameters

Input Parameters

Input R.F. nominal level DTV 0,3 W (rms)

ATV 1 W peak sync

Input impedance 50 Ω, unbalanced

Input return loss < 18 dB

3 )

3 ) 3 )

3 ) Output Parameters

Output ParametersOutput Parameters

Output Parameters

Output frequency range BANDS IV-V: 470-860 MHz

Power gain > 35 dB

Output impedance 50 Ω, unbalanced

Permissible VSWR <1.5

Nominal Output power DTV 750 W (rms)

ATV 1800 W peak sync

4 )

4 ) 4 )

4 ) Dimensions and Weight

Dimensions and WeightDimensions and Weight

Dimensions and Weight

Dimensions Standard 19” frame, 435W x 505D x 135H mm

Weight 23 kg

Page 10 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

IV -

IV - IV -

IV - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

1 )

1 ) 1 )

1 ) Theory of operation of UHF RF Amplifier ETL0W474G series

Theory of operation of UHF RF Amplifier ETL0W474G seriesTheory of operation of UHF RF Amplifier ETL0W474G series

Theory of operation of UHF RF Amplifier ETL0W474G series

•The series ETL0W474G UHF TV RF Amplifier blocks diagram is shown in Figure 1.

•The nominal RF input coming from the external Exciter is pre-amplified by the driver module

MOE267. An electronic attenuator is mounted at the input of the driver amplifier. The MLC signal

coming from Logic & Microprocessor board controls the attenuator, in order to equalize the gain of

the modular amplifiers of the system.

•On module ETL0W474G an ALC control signal manages the output power of the amplifier in order

to keep constant its value. This ALC reference level is set directly on the module via the control

button on the front panel. When the transmitter system has more than one ETL0W474G Amplifier,

the ALC reference is provided by the Supervisor.

•A directional coupler monitors forward input power sent to the final stage. D.C. samples of these

quantities are sent to the metering, alarm and protection module.

A four way hybrid divider splits the drive power into four components, which feed four modules

MOE272. RF output from each module is combined by a four way hybrid combiner.

The output directional coupler, which is equipped with built-in high sensitivity detectors for forward

and reflected RF power, provides D.C. samples to the Metering and Protection module.

•The metering outputs of the metering, alarm and protection module feed an alphanumeric display,

located on the front panel. This display provides all the significant electrical parameters: RF power,

temperature, supply voltages and currents and other important information.

•The D.C. supply is distributed in such a way that, if one of the power supplies fails, the driver

Amplifier and 3 of the output stages are still supplied. In this condition, the surviving supplies will

sustain an output current increase of several Amperes and the amplifier output will drop to

approximately 50% rated power, but service will not be disrupted. In this situation a warning event is

also generated. If two of the power supplies fail, an alarm event is generated. (See also chapter:

Alarm and warning events).

•Should a transistor of the RF driver stage fail in short circuit, one of the fuses of the D.C. combiner-

splitter circuit will open, and the amplifier output will drop to approximately 25% rated power.

•The yellow LINE LED, when lit, shows presence of A.C. power mains.

•The green ON AIR LED is on when the Amplifier is operating under normal conditions. When the RF

power output drops below approximately half power (- 3 dB threshold), this LED is extinguished. This

led blinks if the amplifier is enable and ready.

•The red ALARM LED is normally dark. It turns on to indicate that one alarm has occurred. In this

condition the Metering, alarm and Protection module immediately disables the amplifier.

•The red V.S.W.R. ALARM LED is normally dark. It turns on to indicate that the reflected output power

has risen above a pre-set, critical threshold. In this condition the Metering and Protection module

immediately disables the amplifier.

•The yellow WARNING LED is normally dark. It turns on to indicate that one or more operating

parameters have risen above the normal limiting values. This LED blinks if some past warnings and

alarms are stored in the EEPROM non volatile memory of the microprocessor. This LED turns off only

if the memory has been cleared.

Oct 2013 CMAN0W474G Page 11

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ETL0W474G Rev. 004

Figure 1: UHF TV RF Power Amplifier series ETL0W474G, blocks diagram

Page 12 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

Section D-

Section D-Section D-

Section D-INSTALLATION AND OPERATING

INSTALLATION AND OPERATING INSTALLATION AND OPERATING

INSTALLATION AND OPERATING

INFORMATION

INFORMATIONINFORMATION

INFORMATION

I -

I - I -

I - INSTALLATION

INSTALLATIONINSTALLATION

INSTALLATION

The series ETL0W474G TV RF Amplifier is assembled in a 3U drawer that can be mounted in a 19 inch

standard rack.

1 )

1 ) 1 )

1 ) Series

Series Series

Series ETL0W474G R. F. Amplifier: mounting procedure

ETL0W474G R. F. Amplifier: mounting procedureETL0W474G R. F. Amplifier: mounting procedure

ETL0W474G R. F. Amplifier: mounting procedure

•Connect hoses of the hydraulic circuit to non-spill coupling of the amplifier. Pay attention to pipes

Pay attention to pipes Pay attention to pipes

Pay attention to pipes

connection of the cooling system to the inlet/outlet connectors of the amplifier. Inlet and outlet

connection of the cooling system to the inlet/outlet connectors of the amplifier. Inlet and outlet connection of the cooling system to the inlet/outlet connectors of the amplifier. Inlet and outlet

connection of the cooling system to the inlet/outlet connectors of the amplifier. Inlet and outlet

connections of the coolant must NOT be interchanged (refer to Figure 3).

connections of the coolant must NOT be interchanged (refer to Figure 3). connections of the coolant must NOT be interchanged (refer to Figure 3).

connections of the coolant must NOT be interchanged (refer to Figure 3).

•Connect the 7-16 type coaxial RF plug from the output power adder to the R.F. OUTPUT socket of

the Power Amplifier. Connect a 50 Ω coaxial cable, “N” type male connector from the Input power

divider gain and phase equalizer to the RF INPUT socket of the Power Amplifier.

•Connect the 9-pin socket type “D”, between the E-LINK SERIAL NETWORK socket of the Power

Amplifier and the other Power Amplifier.

•Connect the 5 pin DIN male cable, between the ENABLE IN/OUT DIN socket of the Power Amplifier

and the Exciter.

•Connect the 57 V A.C. plug into the A.C. socket located on the rear panel of the Power Amplifier.

2 )

2 ) 2 )

2 ) Other connections

Other connectionsOther connections

Other connections

•The series ETL0W474G make available external alarm connections by means of hard wired and

insulated relay contacts. Additionally, all significant operating parameters are provided on a

standard RS-232 and RS-485 interface.

•To wire the relay contacts to external circuits, see the following chapters: ALARMS OUT socket. Note

that contacts are rated 48 V D.C. @ 0.1A maximum.

Oct 2013 CMAN0W474G Page 13

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ETL0W474G Rev. 004

3 )

3 ) 3 )

3 ) S

Series

eries eries

eries ETL0W474G: front panel controls, displays & connectors

ETL0W474G: front panel controls, displays & connectors ETL0W474G: front panel controls, displays & connectors

ETL0W474G: front panel controls, displays & connectors

The front panel of the series ETL0W474G TV RF AMPLIFIER is shown in Figure 2. The controls, displays

and connectors on the front panel are as follows:

FRONT PANEL

FRONT PANELFRONT PANEL

FRONT PANEL ICON

ICONICON

ICON ITEM

ITEMITEM

ITEM DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

SIGNALS &

SIGNALS & SIGNALS &

SIGNALS &

CONNECTIONS

CONNECTIONSCONNECTIONS

CONNECTIONS

1 RF MONITOR BNC socket. Provides a monitoring sample of the RF

output.

2 SERIAL PORT RS232 Type “D”, 9-pin socket. Makes RF Amplifier parameter

data available for display on an external PC or

monitoring system.

(RS-232 format)

PUSHBUTTONS

PUSHBUTTONSPUSHBUTTONS

PUSHBUTTONS

SELECT Controls the menu levels and is menu driven, as

explained in detail in the “MENU DESCRIPTION”

following.

Normally controls the lower row of the display and is

menu driven.

Normally controls the upper row of the display and is

menu driven.

PREV. Controls the menu levels and is menu driven, as

explained in detail in the “MENU DESCRIPTION”

following.

DISPLAYS and LED’s

DISPLAYS and LED’sDISPLAYS and LED’s

DISPLAYS and LED’s 4 MULTIFUNCTION

METERING DISPLAY

Two row, 16-character alphanumeric display. Shows

levels of: RF output power, supply voltage, supply current

and heat-sink temperature. It also shows warning

conditions, alarm conditions and other information.

A.C. POWER LED (YELLOW) Shows presence of mains voltage.

ON AIR LED (GREEN) Indicates that the RF Amplifier is operating normally and

RF output is within specified limits.

ALARM LED (RED) When lit, this LED indicates that one alarm has occurred.

In this condition the Metering, alarm and Protection

module immediately disables the amplifier.

V.S.W.R. ALARM LED (RED) This indicator shows that the reflected RF power alarm has

been triggered. As soon as it turns on, the power supply is

disabled.

WARNING LED (YELLOW) Indicates one or more warning conditions in act, if

blinking indicates alarm or warning stored in the EEPROM

non-volatile memory.

Page 14 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

Figure 2: Front panel of series ETLW0474G TV RF Amplifier

Oct 2013 CMAN0W474G Page 15

1515

ETL0W474G Rev. 004

4 )

4 ) 4 )

4 ) Series

Series Series

Series ETL0W474G: rear panel connectors

ETL0W474G: rear panel connectorsETL0W474G: rear panel connectors

ETL0W474G: rear panel connectors

The rear panel of the series ETL0W474G TV RF AMPLIFIER is shown in Figure 3. The connectors on the

rear panel are as follows:

REAR PANEL

REAR PANELREAR PANEL

REAR PANEL ICON

ICONICON

ICON ITEM

ITEMITEM

ITEM DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

SIGNALS AND EXTERNAL

SIGNALS AND EXTERNAL SIGNALS AND EXTERNAL

SIGNALS AND EXTERNAL

CONNECTIONS

CONNECTIONSCONNECTIONS

CONNECTIONS

1 RF INPUT RF input, type N socket.

2 RF OUTPUT RF output, type 7-16 socket.

3 ENABLE IN/OUT DIN type socket. Receives the ENABLE voltage from

the Exciter and sends a READY signal to the Exciter.

4 ALARMS OUT Type “D”, 25-pin socket. Provides contacts from the

“Low RF output power” alarm relay and the

“Reflected RF power alarm” relay.

5 E-LINK Type “D”, 9-pin socket, to be connected to the

Supervisor. This link is used to implement a

communication between the Amplifier and the

Supervisor.

6 SERIAL DATA

IN/OUT RS-485

Type “D”, 9-pin socket. Makes RF Amplifier

parameter data available for display on an external

PC or monitoring system.

(RS-485 format)

7 Non-spill coupling Inlet/outlet liquid coolant.

A.C. POWER INPUT

A.C. POWER INPUTA.C. POWER INPUT

A.C. POWER INPUT 8 LINE INPUT A.C. mains socket.

Page 16 CMAN0W474G Oct 2013

Rev. 004 ETL0W474G

Figure 3: Rear panel of series ETL0W474G TV RF Amplifier

Oct 2013 CMAN0W474G Page 17

1717

ETL0W474G Rev. 004

5 )

5 ) 5 )

5 ) Enable IN/OUT DIN socket

Enable IN/OUT DIN socketEnable IN/OUT DIN socket

Enable IN/OUT DIN socket

Figure 4: Enable socket and connector

This socket is used:

•To enable the Amplifier with an external command.

•To co-ordinate the operation of the RF Amplifier with an external Exciter, by means of an inter-

connection cable.

•PIN 1

PIN 1PIN 1

PIN 1: +15 V enable to RF Amplifier from external Exciter.

•PIN 2

PIN 2PIN 2

PIN 2: Ground.

•PIN 3

PIN 3PIN 3

PIN 3: +10 V (nominal) enable output (“READY”) signal to external Exciter.

6 )

6 ) 6 )

6 ) ALARMS OUT socket

ALARMS OUT socketALARMS OUT socket

ALARMS OUT socket

This is a 25 pin DIN type socket, which may be used to make external connections as shown in following

Table.

Table 1: Connections to ALARMS OUT socket

Figure 5: ALARMS OUT socket

PINPIN

PIN 25 PIN DIN SOCKET

25 PIN DIN SOCKET25 PIN DIN SOCKET

25 PIN DIN SOCKET

1Configurable alarm. Contact closed in alarm

condition.

2Configurable alarm. Common contact.

3Configurable alarm. Contact open in alarm condition.

4-5-6-7-8-9-10-

4-5-6-7-8-9-10-4-5-6-7-8-9-10-

4-5-6-7-8-9-10-

11-12-13

11-12-1311-12-13

11-12-13 Not connected.

1414

14 Configurable alarm. Contact closed in alarm

condition.

1515

15 Configurable alarm. Common contact.

1616

16 Configurable alarm. Contact open in alarm condition.

17-18-19-20-

17-18-19-20-17-18-19-20-

17-18-19-20-

21-22-23-24-25

21-22-23-24-2521-22-23-24-25

21-22-23-24-25 Not connected.

Page 18 CMAN0W474G Oct 2013

Socket seen from

back panel of

equipment

Rev. 004 ETL0W474G

7 )

7 ) 7 )

7 ) SERIAL DATA RS-485 socket

SERIAL DATA RS-485 socketSERIAL DATA RS-485 socket

SERIAL DATA RS-485 socket

Table 2: Connections to SERIAL DATA RS485 socket

Figure 6: Serial DataRS485 in-out socket

PINPIN

PIN DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

1 TX Data +

2 TX Data -

3 RX Data -

4 RX Data +

5 Ground.

6 Not connected.

7 Not connected.

8 Not connected.

9 Not connected.

8 )

8 ) 8 )

8 ) SERIAL PORT RS-232 socket

SERIAL PORT RS-232 socketSERIAL PORT RS-232 socket

SERIAL PORT RS-232 socket

Table 3: Connections to SERIAL DATA RS232 socket

Figure 7: Serial Data Com in-out socket

PINPIN

PIN DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

1 Not connected.

2 TX out

3 RX in

4 RX c.er

5 Ground.

6 Not connected.

7 Not connected.

8 TX c.er

9 Not connected.

9 )

9 ) 9 )

9 ) E-LINK SERIAL NETWORK socket

E-LINK SERIAL NETWORK socketE-LINK SERIAL NETWORK socket

E-LINK SERIAL NETWORK socket

Table 4: Connections to E-LINK SERIAL NETWORK socket

Figure 8: E-LINK SERIAL NETWORK in-out socket

PINPIN

PIN DESCRIPTION

DESCRIPTIONDESCRIPTION

DESCRIPTION

1 Not connected.

2 CAN low

3 GND

4 Not connected.

5 Shield

6 Not connected.

7 CAN high

8 Not connected.

9 Not connected.

Oct 2013 CMAN0W474G Page 19

1919

ETL0W474G Rev. 004

10 )

10 ) 10 )

10 ) Data Communication

Data CommunicationData Communication

Data Communication

•A serial CAN port E-LINK network interconnection among power amplifiers.

•A serial port is available as output interface in RS-232 standard.

•A serial port is available as output interface in RS-485 standard.

•The Technical information manual for the installation and operation of the interface is available

from EuroTel to EuroTel Customers on request.

Page 20 CMAN0W474G Oct 2013

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EuroTel ETL0W474G Operating And Technical Manual

Brand: EuroTel

Model: ETL0W474G

Type: Operating And Technical Manual

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EuroTel ETL0W474G Operating And Technical Manual

EuroTel ETL0W474G Operating And Technical Manual

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