EuroTel ETL0310 Series Manuel utilisateur

Technical Manual

(INSTALLATION & USE)

SERIES ETL0310 TELEVISION TRANSMITTER

CMAN0310

EuroTel S.r.l.

Via Martiri della Libertà

Angolo Via Beltrame

20035 Lissone (MI), Italy

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

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

EUROTEL – ITALY TV Transmitter ETL0310

Series ETL0310 TELEVISION TRANSMITTER

(INSTALLATION & USE)

TABLE OF CONTENTS

1. INTRODUCTION ................................................................................................................................................ 4

2. SCOPE.................................................................................................................................................................. 4

3. TRANSMITTER CONFIGURATIONS............................................................................................................... 4

4. COMPOSITION ................................................................................................................................................... 4

5. TECHNICAL SPECIFICATIONS ....................................................................................................................... 5

General........................................................................................................................................................................ 5

Video Input Parameters............................................................................................................................................... 5

Audio Input Parameters............................................................................................................................................... 5

I.F. Parameters............................................................................................................................................................ 5

Output Parameters ...................................................................................................................................................... 6

Transmission Quality................................................................................................................................................... 6

Dimensions and Weight ............................................................................................................................................... 6

EC (European Community) Certification and Type Approval..................................................................................... 6

6. FUNCTIONAL DESCRIPTION .......................................................................................................................... 7

General description ..................................................................................................................................................... 7

7. TRANSMITTER CONFIGURATIONS & MODEL NUMBERS ....................................................................... 8

8. INSTALLATION ................................................................................................................................................. 9

Stand Alone Mounting Procedure................................................................................................................................ 9

Controls, Displays & Connectors (front panel) ........................................................................................................... 9

Controls, Displays & Connectors (rear panel).......................................................................................................... 11

Enable IN/OUT DIN socket ....................................................................................................................................... 11

D.C. power input socket (A.C.- D.C. equipment only)............................................................................................... 11

SERIAL DATA COM (RS-232) socket ....................................................................................................................... 12

SERIAL DATA RS-485 socket.................................................................................................................................... 12

E-LINK socket ........................................................................................................................................................... 12

Auxiliary control socket............................................................................................................................................. 13

9. OPERATING PROCEDURES ........................................................................................................................... 14

First Time Operation for Stand Alone Transmitters .................................................................................................. 14

10. METERING POWER SUPPLY MODULE - MULTI-FUNCTION METERING DISPLAY ........................... 14

Alphanumeric LCD display description..................................................................................................................... 15

First level menu description ...................................................................................................................................... 15

Warning LED............................................................................................................................................................. 16

11. ALIGNMENT AND MAINTENANCE INSTRUCTIONS ............................................................................... 16

Procedure L.O.: Operation and set-up of Synthesised Local Oscillator MODM96B................................................ 17

Procedure A.G.C.-A.L.C.: Linearity pre-correction and the R.F. power output – Controller MODM33-6 .............. 18

FIGURES

Figure 1: Television Transmitter ETL0310 .......................................................................................................................... 5

Figure 2: Television Transmitter ETL0310 blocks diagram................................................................................................. 7

Figure 3: Audio input connections. .................................................................................................................................... 10

Figure 4: Enable socket and connector.............................................................................................................................. 11

Figure 5: D.C. input socket ................................................................................................................................................ 11

Figure 6: Serial Data Com in-out socket ........................................................................................................................... 12

Figure 7: Serial DataRS485 in-out socket......................................................................................................................... 12

Figure 8: E-LINK in-out socket.......................................................................................................................................... 12

Figure 9: ETL0310, rear panel of 4 W A class to 10W AB class models, A.C. mains only ................................................ 13

Figure 10: ETL0310, rear panel of 10 W A class to 50 W AB class models, A.C. mains only ........................................... 14

Figure 11: Blocks diagram for pre-correction set-up of TV Transmitters.......................................................................... 19

TABLES

Table 1: List of available products....................................................................................................................................... 4

Table 2: Transmitter modular components .......................................................................................................................... 4

Table 3: Product certification .............................................................................................................................................. 6

Table 4: Model code number................................................................................................................................................ 8

Table 5: Codes for position “9”........................................................................................................................................... 8

Table 6: Examples of model code......................................................................................................................................... 8

Table 7: Front panel control & connection devices referred to Figures 1........................................................................... 9

Table 8: Wiring of audio connector ................................................................................................................................... 10

Table 9: Rear panel connections ........................................................................................................................................ 11

Table 10: Wiring to the Auxiliary Control socket............................................................................................................... 13

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TV Transmitter ETL0310 EUROTEL - ITALY

Technical Manual

Series ETL0310 Television Transmitter

AMENDMENT RECORD SHEET

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

Release Language DESCRIPTION AUTHORITY DATE

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.

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.

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EUROTEL – ITALY TV Transmitter ETL0310

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.

EMERGENCY RESUSCITATION: EXPIRED AIR METHOD

If possible, lay 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).

Fig 1

Fig 2

Fig 3

Fig 4

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 3).

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

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.

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

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TV Transmitter ETL0310 EUROTEL - ITALY

1. INTRODUCTION

The Series ETL0310 Television (TV) Transmitter receives at its inputs Video and Audio programme signals, processes them at standard

I.F. frequency, converts the I.F. signal to the desired transmitting R.F. channel and amplifies the R.F. signal to a power suitable for

Broadcasting or for driving external high power Amplifiers. The TV Broadcasting Transmitter ETL0310 is supplied in two different

versions, depending on the band-pass R.F. output filter. If the Transmitter is to be connected directly to the transmitting antenna, the unit

is supplied with a band-pass filter installed into the chassis (UHF) or outside the chassis (VHF). In this case the model has a TX suffix,

as explained in Section 7. If the Transmitter is used as Exciter for higher power stages, then the band-pass filter is omitted. A complete

selection of options, covering R.F. output, band of operation, TV standards and power supplies, together with ordering information, is

given in Section 7.

2. SCOPE

The scope of this manual is to provide information on the use and operation of the Series ETL0310 TV Transmitter. This manual covers

all Transmitters having outputs in Band III VHF and Bands IV & V UHF. Most of the present information can be used also for

Transmitters having outputs in Band I VHF. The technical information available for the ETL0310 Series Transmitters is given in two

TECHNICAL MANUALS. The first MANUAL, concerns “INSTALLATION & USE”, while the second MANUAL, “TECHNICAL DATA”,

provides in-depth technical information, such as special alignment procedures, schematic diagrams, parts layouts and parts lists. Unless

a special order is made, only the “INSTALLATION & USE” handbook is normally shipped with the equipment.

3. TRANSMITTER CONFIGURATIONS

Depending on the R.F. Amplifiers installed after the Up-Converter, several power outputs and performance configurations are possible,

according to the final application. Class “A” equipment has been designed to drive higher power external R.F. Amplifiers, either solid

state or tube. With class “A” Exciters, most of the pre-correction operational margin can be used to compensate for the distortion of the

R.F. Amplifiers being driven. Class “AB” equipment, delivering higher power in the same size, is better suited for stand-alone operation

with direct connection to the transmitting antenna. In this case the built-in pre-correction is used to compensate the internal R.F.

Amplifiers.

Table 1: List of available products

DESCRIPTION BAND R.F. W CLASS R.F. MODULES MODEL

UHF TV Transmitter IV-V 4 “A” MOE138AA ETL0310TA..

UHF TV Superdriver Transmitter IV-V 10 “A” MOE138NA+MOE140A

ETL0310TC..

UHF TV Transmitter IV-V 50 “AB” MOE138NA+MOE140C ETL0310TH..

VHF TV Transmitter III 10 “A” MOE155A ETL0310TF..

VHF TV Transmitter III 50 “AB” MOE155C ETL0310TG..

VHF TV Transmitter I 10 “A” MOE156A ETL0310TR..

VHF TV Transmitter I 50 “AB” MOE156C ETL0310TQ

4. COMPOSITION

The Series ETL0310 TV Transmitter consists of seven plug-in modules mounted in a standard 3 U 19” rack cabinet. In addition to the

seven plug-in modules, the R.F. Power amplifier(s) are mounted on a heat sink on the rear panel, and a switch mode Power Supply is

mounted on the cabinet wall. The plug-in modules are interfaced by a motherboard through 96-pin type connectors on each card,

equipped, when necessary, with coaxial sockets. The other modules are hard wired into the chassis. All the available modules are

shown below.

Table 2: Transmitter modular components

NORMAL CONFIGURATION MODULES NOTES UHF BIV-V VHF BIII

Video Processor (*) MODM23A MODM23A

Sound Modulator (*) MODM25A MODM25A

Vision Modulator (*) MODM24B MODM24B

A.G.C. - A.L.C. Controller (*) MODM33-6 MODM33-6

Synthesized Local Oscillator (*) MODM 96B MODM96BV3

Up Converter (*) MODM41B MODM41BV3

Metering & Power Supply Unit (+5 V, ±15 V) (*) (**) MODM206 MODM206

Switch Mode Power Supply Unit for R.F. Amplifiers (**) MOE104A10 MOE104A10

OTHER AVAILABLE MODULES NOTES UHF BIV-V VHF BIII

IRDETO system, scrambler adapter (****) MOE77 MOE77

DC fed Power Supply (+5 V, ±15 V, +V for R.F.

Amplifiers)

(***) MOE107 MOE107

Metering (to be used with DC fed Power Supply) (***) MODM27-4 MODM27-4

* Plug in module. ** A.C. fed configuration. *** D.C. fed configuration. **** Plug-in extender type circuit board.

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EUROTEL – ITALY TV Transmitter ETL0310

Figure 1: Television Transmitter ETL0310

5. TECHNICAL SPECIFICATIONS

General

Primary power........................................................................ 230/240/127/110 V a.c. ±15%, 47 to 60 Hz

Power options ........................................................................+24 V d.c. +20%, -10%

...............................................................................................+48 V d.c., ±20%

Power consumption ...............................................................100W max. full power, 40W max., st-by

(4 W analog and 2W digital RF output power models)

...............................................................................................200W max. full power, 40W max., st-by

(10 W analog and 4W digital RF output power models)

...............................................................................................250W max. full power, 40W max., st-by

(50 W analog and 20W digital RF output power models)

Operating temperature range................................................. 0°C to +45 °C.

Storage temperature range....................................................-10 °C to +70 °C.

Protections & alarms (depending on model)..........................Over voltage (crowbar), over-current,

high HS temperature, excessive reflected power,

low output power..

Video Input Parameters

Number of inputs....................................................................2 with automatic switch

Cross talk attenuation between inputs...................................>56 dB up to 5 MHz

Input signal level ....................................................................1 V p.p.

Input manual gain adjustment................................................± 3 dB

Input impedance ....................................................................75 Ω, unbalanced

Input return loss .....................................................................>30 dB

Video clamping ......................................................................Sync tip or back porch selectable

White clipping set at...............................................................95% of modulation depth

Audio Input Parameters

Number of inputs....................................................................2 with automatic switch

Input signal level ....................................................................+8 dBU at ±50 KHz pk. dev.

Input manual gain adjust........................................................+10/-3 dB

Input impedance ....................................................................600 Ωor >3 kΩ

Test tone nominal frequency..................................................400 Hz

I.F. Parameters

Vision Intermediate Frequency .............................................. 38.9 MHz or as per Standard specified.

I.F. Filter.................................................................................SAW acoustic device.

Different specifications...........................................................EuroTel can provide most TV Standards.

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TV Transmitter ETL0310 EUROTEL - ITALY

Output Parameters

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

BAND III: 174-250 MHz

BAND I 47-90 MHz

Output impedance..................................................................50 ohm, unbalanced

Video S/N unified weighted....................................................>62 dB

Audio S/N ratio.......................................................................>60 dB @ 50 KHz deviation

Permissible VSWR.................................................................<1.5

In-band Intermodulation Products..........................................<60 dBc (-8,-10,-16 dB) @ rated output

Spurious suppression ............................................................>60 dB

Harmonic suppression ...........................................................>60 dB

Long term output frequency stability ......................................<0.5 PPM / 6 months

Transmission Quality

Differential Gain error.............................................................<3%

Differential Phase error ..........................................................<3°

Luminance non-linearity.........................................................<5%

ICPM ......................................................................................<3°

Video Amplitude/freq. response.............................................<±0.5 dB within the vision band

Group Delay tolerance ........................................................... <±30 ns

Audio Distortion......................................................................< ± 0.5 % at 1kHz

Audio Amplitude freq. response.............................................< ± 0.5 dB, 40Hz to 15KHz

Dimensions and Weight

Dimensions ............................................................................Std. 19” frame, 482 W x470 D x 135 H, mm.

Weight for 2 W output models................................................12 kg. approx.

Weight for higher power output models .................................15 kg. approx.

EC (European Community) Certification and Type Approval

The ETL0310 TV Transmitter family conforms to Norm prETS 300-339, for TV Broadcasting, according to European Council Directive

89/336/EEC and to the Italian Legislative Decree N°476/1992. This Equipment has obtained the relevant Official Certificate of

conformance N° EMC/97/046 of 07-04-97.

The following table lists the type approvals for the various models of the family and the relevant certificate numbers as of March 1999.

Where the “Certificate” position has not been filled in, the equipment is in the process of being certified. For an up to date situation

please contact EuroTel.

Table 3: Product certification

Model Frequency band R.F. Power W Certificate

ETL0310TF… VHF Band III 10 0003541 of 8/2/99

ETL0310TA… UHF Band IV-V 4 0003543 of 8/2/99

ETL0310TB… UHF Band IV-V 10 0003550 of 8/2/99

ETL0310TC.. UHF Band IV-V 10 0003549 of 8/2/99

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EUROTEL – ITALY TV Transmitter ETL0310

6. FUNCTIONAL DESCRIPTION

General description

The Series ETL0310 Television (TV) Transmitter accepts at its input the Video programme signal and the Audio programme signal. The

Video signal amplitude modulates the I.F. (Intermediate Frequency) Vision Carrier. The Audio signal frequency modulates the I.F. Sound

Carrier. The Vision and Sound I.F. carrier signals are then combined in the Vision Modulator module. The composite signal is processed

in the A.G.C. - A.L.C. Controller module and then converted to the specified output frequency by the Up Converter module. Output can

be any standard TV Channel in Band IV-V, in Band III or Band I.

Signals Video 1 IN and Video 2 IN enter the Video Processor module where a detector looks for the presence of Video 1. The detector

generates two signals labelled Command -1 and Command -2 which are used in the Audio section to select the Audio 1 or Audio 2

inputs of the Sound Modulator module.

Signals Audio 1 IN and Audio 2 IN are connected to the input of the Sound Modulator module where they are selected by means of the

command signals generated by the Video Processor module, as described above.

R.F. Output

Oscillator

MODM25A

MODM33

MODM96B

MODM41

MODM24B

MODM23A

Only in stand-alone transmitters

Band-pass

Filter

A.G.C. - A.L.C.

Controller

Vision

Modulator

Local

Converte

R.F.

lifie

Audio 1 IN

Audio 2 IN

R.F. Output

Video 1 IN

Video 2 IN

Additional R.F.

Amplifiers

Sound

Modulator

Video

Processor

Figure 2: Television Transmitter ETL0310 blocks diagram

The Sound Modulator module also receives the 38.9 MHz (or the vision frequency specified by the standard in use) reference signal

coming from the Vision Modulator, and sends the I.F. Sound Carrier output signal to the Vision Modulator module where it is added to

the I.F. Vision Carrier. The tone On/Off switch located on the front panel of the module is used to enable or disable an internal 400 Hz

test tone generator. The Sound Modulator generates D.C. metering signals for Sound level and for Sound carrier deviation, which are

sent to the metering unit, for display on the front panel analogue meter.

The Vision Modulator module receives the Video signal coming from the Video Processor and the Sound Carrier coming from the Sound

Modulator. The Video signal amplitude modulates the I.F. Vision carrier. Finally the composite I.F. signal made with the modulated

Sound and Vision carriers is sent to the A.G.C. - A.L.C. Controller module. The Carrier frequency IN/OUT socket can be used as monitor

of the internal oscillator or as external oscillator input.

The I.F. frequency PLL high stability circuit receives the 5 MHz reference frequency from the Local Oscillator Synthesiser module and

locks the I.F. Vision carrier generator of the Vision Modulator module to the reference of the Synthesised Local Oscillator. Therefore all

carrier frequencies within the Transmitter are locked to a single reference.

The I.F. signal output from the Vision Modulator module enters the A.G.C. - A.L.C. Controller module that incorporates several signal

processing circuits and devices, as follows :

• The A.G.C. section keeps the I.F. level in the A.G.C. - A.L.C. Controller module constant.

• The A.L.C. section keeps the output R.F. signal at constant level by varying the amount of I.F. signal fed to the Up Converter

module.

• Switches A.G.C. / m.g.c and A.L.C. / m.l.c. are used for testing and alignment.

• Switch PREC. ON/OFF controls the insertion of the linearity pre-corrector for the output stages. Pre-correction is made at I.F.

frequency.

• Screwdriver controls directly accessible from the front panel of the A.G.C. – A.L.C. Controller allow easy adjustment of the R.F.

output power, either in manual mode (open loop) or in A.L.C. mode (closed loop).

After this processing, the I.F. signal leaves the A.G.C. - A .L.C. Controller module and enters the Up Converter module, which also

receives the appropriate conversion signal from the Local Oscillator module at a frequency above the transmitted vision carrier

frequency. The difference between conversion signal and transmitted vision frequency is the value of the I.F. frequency specified by the

standard in use.

The R.F. OUT signal output from the Up Converter Module is sent to the R.F. Amplifier stages. The basic Transmitter has a power

output of 4 W. Different R.F. Amplifier modules are installed to achieve the required power output. Amplifiers are based on LDMOS

technology.

An output band-pass filter is supplied if the Transmitter is specified for stand-alone operation, (without an external R.F. output amplifier).

The A.C. ONLY mains fed Transmitter has a Power Supply arrangement that works as follows: the On/Off switch on the front panel turns

the equipment on by controlling the A.C. input to the mains transformer and a green LED is lit when the mains voltage is enabled. This

transformer feeds rectifiers that provide raw D.C. power to two different power supplies. The first supply is the Metering - Power Supply

module that provides the + 5 V and ± 15 V D.C. The second supply module is a Switch Mode Power Supply that generates the D.C.

voltage needed by the R.F. power amplifiers.

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TV Transmitter ETL0310 EUROTEL - ITALY

The A.C. - D.C. fed Power Supply option allows operation from 220/230 V mains as well as + 24 V D.C. or + 48 V D.C. (depending on

option). In this case the input D.C. voltage is used by a switch mode power supply to generate the + 5 V, ± 15 V and the D.C. voltage

used by the R.F. Amplifiers. The ON/OFF switch on the front panel controls the A.C. & D.C. input power. A yellow LED indicator turns on

when the ON/OFF switch is enabled.

The metering unit is used to monitor signals and supply voltages and provides the following additional features.

• Protection against excessive R.F. drive to the final R.F. Power Amplifier.

• Protection to the final R.F. Power Amplifier for excessive reflected power.

• Alarm for low output power.

Additionally, alarms corresponding to the above conditions are also provided, by means of hard-wired relay contacts, to the Auxiliary

Control Connector located on the rear apron of the Transposer.

7. TRANSMITTER CONFIGURATIONS & MODEL NUMBERS

The model number of the ETL0310 Transmitter is a 15-position code as follows:

Table 4: Model code number

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

E T L 0 3 1 0 T

power

band

freq.

genera

tion

I.F.

PLL

- TV Std. spare

spare

Positions 1to 8are fixed and never change.

Position 9specifies power output, band of operation and operating class of final R.F. Amplifier with the following letter code. Blank

spaces are reserved to equipment on special order or under development.

Table 5: Codes for position “9”

Po W Band Class Position 9

4 UHF IV-V “A” A

10 UHF IV-V “A” C

50 UHF IV-V “AB” H

10 VHF III “A” F

50 VHF III “AB” G

10 VHF I “A” R

50 VHF I “AB” Q

Position 10 defines type of frequency generation. EuroTel now only supplies Synthesised Local Oscillators as standard equipment, so

that there is always Sin this position.

Position 11 defines whether or not the I.F. PLL circuitry is included or not. Being included as standard equipment, there is always Pin

this position.

Position 12 is a separation mark: - .

Position 13 defines the TV Standard and is not used for standards B and G. For other standards such as M, K, Ietc., then the

corresponding letter is used.

Positions 14 and 15 are spare and/or used when the output band-pass filter is built-in, for direct connection to the antenna. In this case

the letters Tand X are used.

IMPORTANT: when a position is not used, its place is taken by the next position, in order to always form a code with no gaps.

NOTE: Equipment with R.F. output up to 10 W can optionally work off D.C. supplies (+ 24 or + 48 V D.C.). Relevant options, to be

added after the 15-position code are:

• 220V A.C. & + 24 V D.C.: OPT. 0016.

• 220V A.C. & + 48 V D.C.: OPT. 0015.

Table 6: Examples of model code

Description Code

UHF Band IV-V, 10 W Synthesised TV Transmitter, Std. M, for driving Solid State R.F. Amplifier ETL0310TCSP-M

UHF Band IV-V, 50 W Synthesised TV Transmitter, Standard G, B pass filter installed ETL0310THSP-TX

UHF Band IV-V, 50 W Synthesised TV Transmitter, Standard M, B pass filter installed ETL0310THSP-MTX

UHF Band IV-V, 4 W Synthesised TV Transmitter, Std. G, B pass filter installed ETL0310TASP-TX

VHF Band III, 10 W Synthesised TV Transmitter, Standard I, B pass filter installed ETL0310TFSP-ITX

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8. INSTALLATION

The Series ETL0310 Television (TV) Transmitter is constructed in a 3U drawer that can be mounted in a 19” standard rack cabinet. The

Transmitter can be supplied for stand-alone service, or for direct connection to the antenna: (TX suffix). In this case a band-pass filter is

internally (UHF output) or externally (VHF output) installed. When the Transmitter is supplied for driving an external R.F. Amplifier, the

band-pass filter is omitted.

NOTE: When the Transmitter is intended for use with scrambled TV signals using sync suppression techniques, such as IRDETO or M-

NET type signals, the sync pulse is missing and the Transmitter has been programmed to disable (by means of internal Jumpers) all

pulse driven circuitry. In such Transmitters the “Economy” circuitry is disabled.

Stand Alone Mounting Procedure

Check that all the plug-in modules are correctly inserted and fastened to the drawer. Insert the drawer in its selected place in the cabinet

(if available) and fasten with four rack screws (not supplied). Leave at least 1U of free space above and below the Transmitter to obtain

adequate cooling. Make sure the front panel mounted ON/OFF switch is in the “OFF” position.

Connect the R.F. “N” type plug from the Transmitting Antenna cable to the R.F. OUTPUT socket of the Transmitter, this socket is

located on the rear panel.

Connect the main video programme signal to the VIDEO 1 IN socket of the Transmitter. Connect (if available) the secondary video

programme signal to the VIDEO 2 IN socket of the Transmitter. These sockets are located on the front panel of the Video Processor

plug-in module.

Connect the main Audio programme signal to the AUDIO 1 IN socket of the Transmitter. Connect (if available) the secondary Audio

programme signal to the AUDIO 2 IN socket of the Transmitter. These sockets are located on the front panel of the Sound Modulator

plug-in module.

Connect the 220 V A.C. plug into the A.C. receptacle located on the rear panel of the Transmitter.

The green led “Driver enabled” on the A.G.C.- A.L.C. Controller front panel lights when the Transmitter is enabled to transmit (internally

or externally), and the Local Oscillator is locked.

NOTE: The jumper J1 in the A.G.C-A.L.C. Controller module sets the enabling function as follows:

• Jumper J1 positioned in Ext. position: Transmitter is enabled to transmit with external voltage.

• Jumper J1 positioned in Int. position: Transmitter is enabled to transmit as soon as the mains switch is actuated.

NOTE: The Auxiliary control socket carries several relay contacts for various alarm conditions. Please refer to Table 10 for wiring

information.

First time operation and other relevant instructions are given in Section 9, OPERATING PROCEDURES, following.

Controls, Displays & Connectors (front panel)

Table 7: Front panel control & connection devices referred to Figures 1

PLUG-IN ITEM DESCRIPTION

VIDEO PROCESSOR VIDEO 1 IN BNC socket, main (preferred) video input

Gain trimmer Screwdriver adjustment of video 1 gain.

VIDEO 2 IN BNC socket, secondary video input.

Gain trimmer Screwdriver adjustment of video 2 gain.

Video 1 present (green) Lit when video 1 and audio 1 are selected

Switch position (yellow) Lit when video 2 and audio 2 are selected

White clipping (red) Lit in white clipping

SOUND MODULATOR AUDIO 1 IN DIN socket, main (preferred) audio input.

Gain trimmer Screwdriver adjustment of audio 1 gain.

Audio 2 IN DIN socket, secondary audio input.

Gain trimmer Screwdriver adjustment of audio 2 gain.

Sound C.er OUT SMB socket. Outputs the frequency modulated I.F. sound

carrier to Vision Modulator SOUND 1 IN.

Carrier on LED (green) Lit when the sound carrier is locked to the vision carrier and the

sound carrier is enabled.

Tone ON/OFF Switches audio test tone on and off.

VISION MODULATOR SOUND 1 IN SMB socket. Inputs the modulated sound carrier.

Level Screwdriver adjustment of the vision-sound level ratio.

SOUND 2 IN SMB socket. Inputs external dual sound or Nicam carrier.

Level Screwdriver adjustment of the Sound 2 input sensitivity.

I.F. OUT BNC socket. Outputs the composite I.F. signal.

I.F. OUT BNC socket. Outputs the composite I.F. signal for monitoring.

C.er freq. in/out BNC socket. Depending on internal Jumpers: a) vision carrier

frequency monitor or b) external vision carrier input.

Nov 02 CMAN0310ENG 9

Table des matières

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