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Related Manuals for EuroTel ETL0310 Series
Summary of Contents for EuroTel ETL0310 Series
- Page 1 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 salesmail@eurotel.it http://www.eurotel.it E-Mail – Web...
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Page 2: Table Of Contents
EUROTEL – ITALY TV Transmitter ETL0310 Series ETL0310 TELEVISION TRANSMITTER (INSTALLATION & USE) TABLE OF CONTENTS INTRODUCTION ..............................4 SCOPE.................................. 4 TRANSMITTER CONFIGURATIONS....................... 4 COMPOSITION ..............................4 TECHNICAL SPECIFICATIONS ........................5 General ..................................5 Video Input Parameters............................... 5 Audio Input Parameters............................... 5 I.F. - Page 3 © EUROTEL S.r.l. 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.
- Page 4 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’...
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Page 5: Introduction
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. -
Page 6: Technical Specifications
Input manual gain adjust............+10/-3 dB Input impedance ..............600 Ω or >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. Nov 02 CMAN0310ENG... -
Page 7: Output Parameters
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... -
Page 8: Functional Description
EUROTEL – ITALY TV Transmitter ETL0310 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. -
Page 9: Transmitter Configurations & Model Numbers
VHF I “AB” Position 10 defines type of frequency generation. EuroTel now only supplies Synthesised Local Oscillators as standard equipment, so that there is always S in 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 P in this position. -
Page 10: Installation
EUROTEL – ITALY TV Transmitter ETL0310 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. -
Page 11: Figure 3: Audio Input Connections
TV Transmitter ETL0310 EUROTEL - ITALY A.G.C. on/off Switches Automatic Gain Control on or off. A.G.C.–A.L.C. CONTROLLER m.g.c. trimmer Screwdriver adjustment of I.F. gain in manual mode. m.l.c. trimmer Screwdriver adjustment of I.F. output level in manual mode. A.L.C. ON/OFF Switches Automatic Level Control on or off. -
Page 12: Controls, Displays & Connectors (Rear Panel)
EUROTEL – ITALY TV Transmitter ETL0310 Controls, Displays & Connectors (rear panel) According to power supply used and to R.F. output power, different versions of the back panel are used. The controls and connectors on the rear panel are as follows:... -
Page 13: Serial Data Com (Rs-232) Socket
TV Transmitter ETL0310 EUROTEL - ITALY SERIAL DATA COM (RS-232) socket Figure 6: Serial Data Com in-out socket DESCRIPTION Not connected. TX out RX in RX c.er Ground. Not connected. Not connected. TX c.er Not connected. SERIAL DATA RS-485 socket... -
Page 14: Auxiliary Control Socket
EUROTEL – ITALY TV Transmitter ETL0310 Auxiliary control socket This is a 25-pin DIN type socket, which may be used to make external connections, as shown in Table 10 below. Table 10: Wiring to the Auxiliary Control socket DESCRIPTION + 15V enable output. Enables external R.F. Amplifier. -
Page 15: Operating Procedures
TV Transmitter ETL0310 EUROTEL - ITALY REF.IN ALC IN (P203) REF.out RF monitor ENABLE IN/OUT RS485 E-LINK R.F. OUTPUT LINE IN AUX. CONTROL (MAINS) FUSES (push out) Figure 10: ETL0310, rear panel of 10 W A class to 50 W AB class models, A.C. mains only... -
Page 16: Alphanumeric Lcd Display Description
EUROTEL – ITALY TV Transmitter ETL0310 Alphanumeric LCD display description Below we list the parameters displayed in an order that is logical and may not correspond to the actual sequence. The two rows of the alphanumeric LCD display can be indifferently configured to show one of the following quantities. -
Page 17: Warning Led
TV Transmitter ETL0310 EUROTEL - ITALY ⇒ Store LCD view ⇒ Clic sel to store ⇒ Turn PWR ON/OFF (Configure the R.F. output power enable) ⇒ Output PWR= ON (R.F. output Amplifier enabled) ⇒ Output PWR= OFF (R.F. output Amplifier disabled) Warning LED The yellow WARNING LED is normally dark. -
Page 18: Procedure L.o.: Operation And Set-Up Of Synthesised Local Oscillator Modm96B
Note: The front panel is equipped with an alphanumeric display and three pushbuttons: UP, DWN. and SEL. O At turn on the front panel display shows the following sequence: EUROTEL – BUILD DATE. The display then shows: L.O. CHANNEL = CH “NN”, where “NN” represents the working channel number. Then the display automatically locks to: CH “NN”... -
Page 19: Procedure A.g.c.-A.l.c.: Linearity Pre-Correction And The R.f. Power Output - Controller Modm33-6
TV Transmitter ETL0310 EUROTEL - ITALY Offset set-up instructions IMPORTANT NOTE: The desired value of frequency offset is selected in Hz, the circuit will choose the closest possible frequency. This procedure doesn’t require to pull out the Local Oscillator module and/or the use of the extension card since this function can be accessed from the front panel. -
Page 20: Figure 11: Blocks Diagram For Pre-Correction Set-Up Of Tv Transmitters
EUROTEL – ITALY TV Transmitter ETL0310 The theoretical consequence from the above is that the positioning of the pre-correction trimmers will be different, depending on the operating class of the R.F. amplifier to be corrected. In practice the difference is not as great as it could be expected, because normally R.F. - Page 21 TV Transmitter ETL0310 EUROTEL - ITALY Here below we give the complete procedure for the setting up of the pre-correction. • Install the MODM33 plug-in on the extender card, in order to gain access to the P.C. board. Using the parts placement diagram, identify trimmers S3-PH3, S2-PH2 and S1-PH1.
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