EuroTel ETL0480TBD User manual

Technical Manual

(INSTALLATION & USE)

1 kW UHF TV RF AMPLIFIER ETL0480TBD

EuroTel S.r.l.

Via della Birona 30/32

20052 Monza, Italy

Tel. +39 039 230 2645 – Fax +39 039 230 2650

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

EUROTEL - ITALY ETL0480TBD

Technical Manual

1 kW UHF B IV-V RF POWER AMPLIFIER ETL0480TBD

TABLE OF CONTENTS

Section A- GENERAL INFORMATION .......................................................................................3

I - AMENDMENT RECORD SHEET ........................................................................................3

II - APPROVAL RECORD SHEET ............................................................................................3

III - WARNINGS ..................................................................................................................4

1 ) FIRST AID IN CASE OF ELECTRIC SHOCK.................................................................4

2 ) EMERGENCY RESUSCITATION: EXPIRED AIR METHOD.............................................. 5

3 ) TREATMENT FOR BURNS..........................................................................................5

Section B- PURPOSE AND PLANNING INFORMATION..............................................................6

I - INTRODUCTION ............................................................................................................ 6

II - SCOPE ..........................................................................................................................6

III - COMPOSITION OF RF AMPLIFIER ETL0480TBD, 1 kW UHF ............................................ 7

IV - COMPOSITION OF ETL0470, RF AMPLIFIER MODULE 700 W UHF ................................8

V - TECHNICAL SPECIFICATIONS........................................................................................9

1 ) General...................................................................................................................9

2 ) Input Parameters......................................................................................................9

3 ) Output Parameters................................................................................................... 9

4 ) Transmission Quality.............................................................................................. 10

5 ) Dimensions and Weight ......................................................................................... 10

VI - FUNCTIONAL DESCRIPTION.......................................................................................11

1 ) Theory of operation of 1 kW UHF RF Amplifier ETL0480TBD ....................................11

2 ) Theory of operation of 700 W UHF TV RF Amplifier Module ETL0470....................... 12

VII - RF AMPLIFIER CONFIGURATIONS & ORDERING INFORMATION.................................14

Section C- OPERATING INFORMATION .................................................................................15

I - INSTALLATION .............................................................................................................15

1 ) ETL0480TBD R. F. Amplifier: mounting procedure ...................................................15

2 ) Other connections..................................................................................................16

3 ) ETL0470: front panel controls, displays & connectors...............................................17

4 ) ETL0470: rear panel connectors .............................................................................19

5 ) Enable IN/OUT DIN socket .................................................................................... 21

6 ) ALARMS OUT socket .............................................................................................. 21

7 ) SERIAL DATA RS-485 socket ...................................................................................22

8 ) SERIAL DATA COM (RS-232) socket ........................................................................22

9 ) E-LINK SERIAL NETWORK socket............................................................................. 22

II - OPERATING PROCEDURES ..........................................................................................23

1 ) First time operation of ETL0480TBD........................................................................23

2 ) RF Amplifier ETL0470: in case of difficulty ...............................................................24

III - ETL0470 - MULTI-FUNCTION METERING DISPLAY.......................................................24

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

2 ) Menu Description...................................................................................................25

3 ) Entering a Menu .................................................................................................... 27

4 ) Example: changing the output power of the ETL0470...............................................28

5 ) Alarm and Warning Thresholds .............................................................................. 29

6 ) Displayed Alarms and Warnings............................................................................. 29

7 ) Warning LED ......................................................................................................... 30

8 ) Data Communication.............................................................................................30

IV - ALIGNMENT & MAINTENANCE INSTRUCTIONS .......................................................... 31

1 ) ETL0470 - Changing the channel of operation, simplified procedure........................31

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2 ) ETL0480TBD – 1 kW – Replacing one RF Amplifier, simplified procedures................. 32

3 ) ETL0480TBD – 1 kW – Replacing one RF Amplifier, detailed procedure .................... 34

TABLE OF ILLUSTRATIONS

Figure 1: ETL0480TBD-TP Transposer (Exciter + Amplifier).......................................................... 7

Figure 2: UHF TV 700 W RF Power Amplifier Module ETL0470.................................................... 8

Figure 3: ETL0480TBD TV RF Amplifier blocks diagram.............................................................11

Figure 4: ETL0470 RF Amplifier blocks diagram........................................................................13

Figura 5 A.C. Mains distribution module – rear panel ............................................................... 16

Figure 6: Front panel of ETL0470 TV RF Amplifier Module.........................................................18

Figure 7: Rear panel of ETL0470 TV RF Amplifier Module..........................................................20

Figure 8: Enable socket and connector ..................................................................................... 21

Figure 9: ALARMS OUT socket .................................................................................................21

Figure 10: Serial DataRS485 in-out socket............................................................................... 22

Figure 11: Serial Data Com in-out socket ................................................................................. 22

Figure 12: E-LINK SERIAL NETWORK in-out socket....................................................................22

Figure 13: Screen of threshold values and calibration data of RF Amplifier ETL0470................... 33

Figure 14: 3 dB hybrid & gain+ phase equaliser MOE142........................................................ 34

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Section A-GENERAL INFORMATION

I - AMENDMENT RECORD SHEET

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

initialed.

Release Language DESCRIPTION AUTHORITY DATE

II - APPROVAL RECORD SHEET

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

Release Signature AUTHORITY DATE

The information contained herein is the property of EUROTEL S.r.l. and is supplied without liability 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

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

electronic storage, etc.

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EUROTEL - ITALY ETL0480TBD

III - WARNINGS

• Observe safety precautions when handling this unit. This equipment operates with dangerous

voltages and currents.

• Always disconnect power before opening covers or removing any part or module of this 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 RF Power Amplifier is operating, do not attempt to remove

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

protection circuitry is in place, sudden loss and re-application of RF drive causes transients that

may damage one or more RF amplification stages.

• In any case, but especially when the RF Power Amplifier is operating, do not change position of the

switch A.G.C. – m.g.c. in the EXCITER. Although suitable protection circuitry is in place, very high

and sudden variations of RF drive cause transients that may damage one or more RF amplification

stages.

1 ) FIRST AID IN CASE OF ELECTRIC SHOCK

DO NOT TOUCH THE VICTIM WITH YOUR BARE HANDS until the 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.

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EUROTEL - ITALY ETL0480TBD

2 ) 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 1a and 1b).

• 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 airway is kept clear.

⇒ Breathing may return, but be NOISY, which means that the airway is

not fully clear. Try to clear the airway.

• 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 blow firmly into his mouth. As you do, his

chest will RISE (figure 2).

⇒ Turn your head away and take another breath, watching for the chest

to FALL (figure 3).

• 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’ color replaces the ‘blue’ look. This is the time to stop resuscitation.

Continue to hold his chin up and so keep the airway clear.

• In the case of injuries to the mouth, it may be necessary to use mouth-to-

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.

3 ) 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 burn part by immersing in cold water.

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

with a DRY clean dressing.

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

with a DRY clean dressing.

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Section B-PURPOSE AND PLANNING INFORMATION

I - INTRODUCTION

• The ETL0470 TV RF Power Amplifier Module provides linear, class “AB” amplification of composite

Vision+Sound TV signals in the standard UHF bands IV & V (470 to 860 MHz). Rated RF output

power is set to 700 W. Nominal input power is 2 W.

• This Power Amplifier Module has been expressly designed to be used in combination with others

700 W Amplifiers:

⇒

two power amplifier modules produce an output power in excess of 1kW,

four power amplifiers modules produce an output power in excess of 2 kW,

eight power amplifier modules are combined to produce a nominal output power of 5kW.

• The configuration of two ETL0470 TV RF Power Amplifier Modules is designated model

ETL0480TBD, which comprises two power amplifier modules, two 3 dB hybrids and a band-pass

output filter with a power rating of 1 kW. All these components are housed in a standard 19” metal

cabinet, which provides additional space for the Exciter and for ancillary equipment.

• A transmitter or a Transposer capable of a full 1 kW output can be built using an Exciter of the

ETL0310 (TV Transmitter) family or of the ETL0290 (TV Transposer) family.

• A complete selection of options, together with ordering information, is given at the end of this

Section B.

II - SCOPE

• The scope of this manual is to provide information on the use, operation and maintenance of:

• The 700 W ETL0470 UHF TV RF Power Amplifier Module.

• The 1 kW ETL0480TB UHF TV RF Amplifier.

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III - COMPOSITION OF RF AMPLIFIER ETL0480TBD, 1 kW UHF

• RF Amplifier ETL0480TBD comprises two ETL0470 TV RF Power Amplifier Modules, one input

power divider, one output RF power summer, 50 Ohm balancing load for the hybrid and one

band-pass filter for the attenuation of harmonic and spurious products. All these parts are

assembled into a standard 19” cabinet 1540 mm high (28 Units), which also carries two large

diameter fans for the extraction of hot air. The list of standard parts is as follows.

PARTS SUPPLIED IN THE STANDARD CONFIGURATION

QTY MODEL

700 W TV RF Power Amplifiers Modules 2 ETL0470

Input power divider gain and phase equalizer 1 MOE142

3 dB Output power summer 1 ETL2140TA

50 Ohm high power balancing load 1 MODM299

Output directional coupler 1 ETL2141TA

Interconnection cables & accessories kit 1 CAV134

Output band pass filter 1 ETL2139TA

Air extraction fan 2 VEH4E315

Mains transformer 1 SPT036-1

Standard 28 unit rack cabinet 1 MECC000343/EURO

Figure 1: ETL0480TBD-TP Transposer (Exciter + Amplifier)

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EUROTEL - ITALY ETL0480TBD

IV - COMPOSITION OF ETL0470, RF AMPLIFIER MODULE 700 W UHF

• The ETL0470 TV RF Power Amplifier Module consists of one class “AB” driver stage, that feeds four

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

mode power supply modules, a microprocessor controlled metering, alarm and protection module,

a directional coupler. All these parts are assembled into a standard 4 unit 19 inch rack chassis.

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

substrate hybrid couplers.

• The R.F. amplifier modules are mounted on a massive heat sink in the bottom part of the cabinet

and the 3 switch mode power supplies are mounted at the upper of the cabinet.

• The modules are:

PARTS SUPPLIED IN THE STANDARD CONFIGURATION

QTY MODEL

Class “AB” UHF RF buffer Amplifier module 1 MOE140-C800

Class “AB” UHF RF Amplifier module (4 final Amplifiers) 4 MOE158-B

Switch Mode Power Supply Unit 3 MOE104ABD

Metering, alarm and protection module 1 MOE183

Figure 2: UHF TV 700 W RF Power Amplifier Module ETL0470

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EUROTEL - ITALY ETL0480TBD

V - TECHNICAL SPECIFICATIONS

1 ) General

Primary power 400 V Tri-phase. +10% -15% 50 Hz,

Consumption: 3k W @ 50% A.P.L. at 1 kW vision carrier power.

Cooling Forced air.

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

Storage temperature range -10 to +70°C.

Nominal UHF output power 1kW

2 ) Input Parameters

Input R.F. nominal level 4 W.

Input impedance 50 Ω, unbalanced.

Input return loss <18 dB.

3 ) Output Parameters

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

Power gain > 25dB.

Gain flatness <1.5 dB.

Output impedance 50 Ω, unbalanced.

Permissible VSWR <1.5.

Standard Output power 1 kW

Spurious suppression > 60 dB.

Harmonic suppression > 60 dB.

Rejection of out of band IMD products > 60 dB.

I.M.D. Products Suppression

(with driver series ETL0310 or ETL0290)

> 60 dB (-8, -10, -16 dB) @ rated output

power, with pre-correction inserted, system

B/G.

> 60 dB (-6, -10, -17) @ rated output power,

with pre-correction inserted, system I.

October 2002 CMAN0480ENG Page 9

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