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DB Elettronica Telecomunicazioni CTX 5 User Manual

5w/10w/20w analog tv exciter uhf band
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ELETTRONICA TELECOMUNICAZIONI S.p.A.
CTX 5/10/20
5W/10W/20W
Analog TV Exciter
UHF Band
User's Manual Release 1.2
DB ELETTRONICA TELECOMUNICAZIONI SpA
Riviera Maestri del Lavoro 20/1 – 35127 Padova
Ph. +39 049 8700588 – E-mail: sales@dbbroadcast.com
Pag. 1/86

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  • Page 1 ELETTRONICA TELECOMUNICAZIONI S.p.A. CTX 5/10/20 5W/10W/20W Analog TV Exciter UHF Band User’s Manual Release 1.2 DB ELETTRONICA TELECOMUNICAZIONI SpA Riviera Maestri del Lavoro 20/1 – 35127 Padova Ph. +39 049 8700588 – E-mail: sales@dbbroadcast.com Pag. 1/86...

  • Page 2: Table Of Contents

    ELETTRONICA TELECOMUNICAZIONI S.p.A. INDEX     INTRODUCTION..............................3     TECHNICAL SPECIFICATIONS......................... 7 ............................7     ECHNICAL EATURES     UNPACKING ................................9     INSTALLATION AND SWITCHING ON PROCEDURE ................. 9     MENU MAP ................................11    ...

  • Page 3: Introduction

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 1 INTRODUCTION This new technology exciter has the function to modulate the video and audio signals referring to the analog standard (PAL, NTSC or SECAM) and to convert the IF signal generated internally into the RF signal at the transmission frequency. The input video and audio signals are first of all modulated to generate the IF signal that is pre- corrected by a 12 slopes precorrection board and converted into the RF signal.
  • Page 4 ELETTRONICA TELECOMUNICAZIONI S.p.A. Front View ALARM WARNING BROADCAST CTX - TV EXCITER Rear View AUDIO 2 AUDIO 1 FUSE 3.15T RF MON. IF IN RF OUT IF OUT INPUT OUTPUT INPUT OUTPUT VIDEO RF IN RF OUT INPUT OUTPUT EXT FWD DC OUT 115-230 Vac 10MHz...
  • Page 5 ELETTRONICA TELECOMUNICAZIONI S.p.A. Internal top view 1. Web interface board (001-000092-00) 2. Audio/Video Modulator (0001-000109-00) 3. 2 audio option 4. Final amplifier part 5. Switching Power supplies (RS 150-24) 6. Display board (001-000113-00) 7. Switching power supply board nr 1 (001-000070-00) for the generation of the +/- 15V, +5V 8.
  • Page 6 ELETTRONICA TELECOMUNICAZIONI S.p.A. Internal bottom view 9. Pre-correction and Up converter boards (001-000114-00) 10. External reference oscillator 5/10 MHz (001-000112-00) 11. Oscillator and Mixer (001-000081-00) 12. Band Pass filter Pag. 6/86...

  • Page 7: Technical Specifications

    UHF – Band IV & V (470-860MHz) TV Standards B, G, D, K, M, N, I Output power 5Wps (CTX 5/U), 10Wps (CTX 10/U), 20Wps (CTX 20/U) 75 ohm – BNC 1) Video Input Input return loss > 35dB (0,25 ÷ 6MHz) Video input level 1Vpp ±...
  • Page 8 ELETTRONICA TELECOMUNICAZIONI S.p.A. 2) Video modulation parameters Amplitude / frequency response ± 0,5dB (within the video band) Differential gain at nominal power < 4% Differential phase at nominal power < ± 2° 2TK factor < 1,5% Group delay PV 0.75/5 MHz <...

  • Page 9: Unpacking

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 3 Unpacking The equipment becomes the property of the customer when the equipment is delivered to the carrier. Carefully unpack the transmitter. Perform a visual inspection to determine that no apparent damage has been incurred during shipment. All shipping materials should be retained until it is determined that the unit has not been damaged.
  • Page 10 ELETTRONICA TELECOMUNICAZIONI S.p.A. SWITCHING ON PROCEDURE • Connect an audio generator to the audio inputs of the unit with a 0 dBm signal of test; • Connect a video generator on the video input of the unit with a black signal (0% field) as test signal;...

  • Page 11: Menu Map

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 5 Menu Map STANDBY CTX VIDEO TRANSMITTER OL UNLOCK CTX VIDEO TRANSMITTER CONFIGURATIONS MENU SYSTEM 0.X.X <CONFIGURATIONS> AUDIO Opt. OUTPUT Options 0.0.X <AUDIO Options> AUDIO 1 SUBC. AUDIO 1 SUBCARRIER 0.0.0 AUDIO 2 SUBCARRIER 0.0.1 AUDIO 1 LOW PASS 0.0.2 AUDIO 2 LOW PASS 0.0.3...
  • Page 12 ELETTRONICA TELECOMUNICAZIONI S.p.A. AUDIO Options 0.1.X <VIDEO Options> VIDEO WHITE CLIPPER VIDEO WHITE CLIPPER 0.1.0 VIDEO SYNC LEVEL 0.1.1 30 % VIDEO LEVEL 0.1.2 0500 mV VIDEO Options 0.2.X <OUTPUT Options> RF Channel VIDEO Carrier Frequency 0.2.0 725250000 Hz RF LEVEL (ALC) 0.2.1 8.2 Wps RF LEVEL (MLC)
  • Page 13 ELETTRONICA TELECOMUNICAZIONI S.p.A. STATUS MENU CONFIGURATIONS 1.X.X <STATUS> AUDIO info VOLTAGE Info 1.0.X <AUDIO Info> AUDIO levels AUDIO 1 SC Level: -5dBm 1.0.0 AUDIO 2 SC Level: -5dBm AUDIO 1 Dev. Level: 50KHz 1.0.1 AUDIO 2 Dev. Level: 50KHz AUDIO 1 PLL: LOCKED 1.0.2 AUDIO 2 PLL: LOCKED AUDIO Info...
  • Page 14 ELETTRONICA TELECOMUNICAZIONI S.p.A. VOLTAGE Info 1.4.X <ALARMS> List Alarms List 1.4.0 NO VIDEO INPUT ALARMS: 1.5.X <WARNINGS> List WARNINGS list 1.5.0 NOT ENABLED SYSTEM MENU STATUS 2.X.X <SYSTEM> SYSTEM Data SYSTEM Info 2.0.X <SYSTEM Control> Local/Remote Remote: 2.0.0 SYSTEM Control 2.1.X <SYSTEM Info>...

  • Page 15: Front Panel Menu

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 6 Front panel menu At the switching on of the unit the indication of the Hardware and Firmware versions of the unit will be showed for some seconds. After this indication the message UPDATING SYSTEM… will indicate that the unit is uploading all the values for its functioning and the first page that will appear is the following one: CTX VIDEO TRANSMITTER The indication STATUS OK means that the transmitter is correctly functioning and the frequency is...
  • Page 16 ELETTRONICA TELECOMUNICAZIONI S.p.A. AUDIO OPTIONS Normally the pages related to AUDIO 1 are present, the pages related to AUDIO 2 are present/enabled only in case the second audio option is present on the unit. The first page of this menu indicates if the audio subcarrier is switched on or off AUDIO 1 SUBCARRIER 0.0.0 The second one indicates if the low pass filter is inserted or not: in case of MONO transmission the...
  • Page 17 ELETTRONICA TELECOMUNICAZIONI S.p.A. The 2 page indicates the sync level: in case the unit is used as stand alone the default value is 100%, while if it is used as driving unit for the amplification part of a complete modular transmitter the sync level has to be set as follows: the total output signal must be demodulated and the sync must be set for the optimization of the signal (the sync of the total transmitter will be 100% and the sync of the CTX has to be set to have it).
  • Page 18 ELETTRONICA TELECOMUNICAZIONI S.p.A. If the transmitter is in MGC mode the same page will allow the change of the RF output power in MGC mode and the indication will be RF LEVEL (MLC). In the 3 page it is possible to choose the mode of the AGC (Automatic Gain Control) of functioning between ALC (Automatic Level Control) and MLC (Manual Level Control).

  • Page 19: Status Menu

    ELETTRONICA TELECOMUNICAZIONI S.p.A. Status menu The Status menu shows the readings of the audio and video parameters moreover the status of the PLL (locked or unlocked). AUDIO INFO In this submenu all the information related to the audio signal (audio 1 and audio 2 if present) are indicated: Audio subcarrier level, deviation level, if the PLL is locked or not.

  • Page 20: System Menu

    ELETTRONICA TELECOMUNICAZIONI S.p.A. VOLTAGE INFO In this submenu the measures related to the internal voltages are indicated. Normally the correct values that should be present when the unit is functioning in the proper way are the ones indicated here below: Meas.

  • Page 21: Frequency Change

    WARNING: In any case, any equipment modification or variation must be made only with DB Elettronica Telecomunicazioni S.p.A. written authorization, otherwise voiding the warranty. To adjust the Output Band Pass filter, in case of adjustments of less than...
  • Page 22 ELETTRONICA TELECOMUNICAZIONI S.p.A. Through the trimmers you see on the front panel hole, it is possible to have access at the variable capacitors (TC1, TC2, TC3, TC4) regulating the bandwidth and the attenuation of the filter (using a screwdriver). Rotate slowly these screw variable capacitors setting the center frequency of the Band Pass Filter on the desired frequency and adjust the filter as in figures below.
  • Page 23 ELETTRONICA TELECOMUNICAZIONI S.p.A. Fig. 7.3 - BPF/O ADJUSTING - SPECTRUM ANALYZER VIEWS (UHF CASE) INSERTION LOSS < 1.5 dB The pictures refer to the UHF case: please do the same in case of VHF functioning of the unit. Pag. 23/86...

  • Page 24: Audio And Video Modulator Board

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 8 Audio and Video modulator board This board accepts the audio and video signals and modulate them in order to have the IF signal on the output. In this board it is possible to make all the adjustments related to the optimization of the video and audio signals, and the adjustments related to the standard choosen by the front panel.
  • Page 25 ELETTRONICA TELECOMUNICAZIONI S.p.A. Audio and video modulator layout Pag. 25/86...
  • Page 26 ELETTRONICA TELECOMUNICAZIONI S.p.A. Electrical diagrams Pag. 26/86...
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  • Page 42: Precorrection And Up Converter Board

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 9 Precorrection and Up converter board This board make a pre-correction on the IF signal and convert it to the desired frequency set by the front panel. The IF Linearity Precorrector, allows for adjustment of the modulated intermediate frequency signal that comes from the modulator, modifying the amplitude and phase which are of non-linear function to the amplitude.

  • Page 43: Front Panel Trimmers

    ELETTRONICA TELECOMUNICAZIONI S.p.A. Front panel trimmers The trimmers related to the Precorrection and Up-converter board can be accessed from the front panel removing the small plaque near the display. 10 11 12 13 14 15 16 17 18 19 20 21 The trimmers for the adjustment are the following ones: Trimmer Description...
  • Page 44 ELETTRONICA TELECOMUNICAZIONI S.p.A. Pre-correction and up converter board top view Pag. 44/86...
  • Page 45 ELETTRONICA TELECOMUNICAZIONI S.p.A. Precorrection and Up-converter board electrical diagrams Pag. 45/86...
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  • Page 60: Oscillator And Mixer

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 10 Oscillator and mixer This board (001-000081-00) contains the oscillator and mixer for the definition of the frequency in the unit. Oscillator and Mixer layout Parts List Item Quantity Reference Part PCB Footprint ___________________________________________________________________ C1,C3,C5,C12,C17,C20,C21, 33pF 0603 C2,C4,C6,C16 10nF 0603...
  • Page 61 ELETTRONICA TELECOMUNICAZIONI S.p.A. Item Quantity Reference Part PCB Footprint ___________________________________________________________________ REF,IF SMB INPUT SMB 90° FLAT 10 VIE 5X2 0603 0603 L1,L2 22nH 0603 TC4-19+ TC1-1-13M Q2,Q1 BC847 SOT23 SMB OUTPUT SMB 90° RX1,RX2,RX3,RX4 uSTRIP 0603 R2,R10,R13,R24,R27,R32 0603 R4,R3 820R 0603 R6,R9,R15,R17,R22 0603 R7,R16,R18,R23...
  • Page 62 ELETTRONICA TELECOMUNICAZIONI S.p.A. Electrical Diagram Pag. 62/86...

  • Page 63: 11 5 Wps Final Amplifier Module (Driver)

    5 Wps (CTX 5/U) 10 Wps (CTX 10/U) 20Wps (CTX 20/U) - Input power max 0.5W (CTX 5/U) for the last stage max 1W (CTX 10/U or CTX 20/U) for the last stage - Frequency range 470÷860MHz - IMD 1W / 5WP. out (-8, -16, -10 dB) <...
  • Page 64 ELETTRONICA TELECOMUNICAZIONI S.p.A. RF Final Amplifier – Stage 1 of amplification pcb (1W output) Lay-out RF Final Amplifier – Stage 1 of amplification pcb (1W output) Part List Item Quantity Reference Part PCB Footprint ______________________________________________ C1,C2,C3,C4,C6 0603 2,7pF 0603 10µF 25V C10,C8 100nF 0805...
  • Page 65 ELETTRONICA TELECOMUNICAZIONI S.p.A. RF Final Amplifier – Stage 1 of amplification pcb (1W output) Electrical Diagram Pag. 65/86...
  • Page 66 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 5 Watt output (001-000117-01) Lay-out Pag. 66/86...
  • Page 67 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 5 Watt output Electrical Diagram Pag. 67/86...
  • Page 68 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 5 Watt output Part List Designator Comment Footprint Value Quantity C-EL 8x10 220µf 35V C2, C6 CASE B Tantalio 10µF 20V C4,C29 CASE B 1nF HQ C3, C8, C10, C25 C_0805 C5, C7, C9, C22, C24, C26, C30...
  • Page 69 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 10/20 Watt output Lay-out C35 C36 CMB1 Ctan Ctan MRF9030 MRF9030 Ctan CMB2 Pag. 69/86...
  • Page 70 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 10/20 Watt output Electrical Diagram Pag. 70/86...
  • Page 71 ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 10/20 Watt output Part List Item Quantity Reference Part PCB Footprint ______________________________________________ CMB1 DB 0305061 COMBINER Splitter CMB2 DB 0305061 COMBINER COMBINER C1,C2,C6,C26,C27 15pF HQ 1210 5,6pF H.Q.

  • Page 72: Display Module

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 12 Display Module This unit has an LCD display on the front panel and 5 buttons (UP, DOWN, LEFT, RIGHT, OK) to navigate inside the menu of the exciter and enter the different menus. In the front panel also 3 leds are present to indicate if the equipment is switched on (mains presence), if an alarm is present and any warning message that can indicate the variation on the normal status of the equipment.
  • Page 73 ELETTRONICA TELECOMUNICAZIONI S.p.A. Display pcb Lay-out (Front and Rear views) Pag. 73/86...
  • Page 74 ELETTRONICA TELECOMUNICAZIONI S.p.A. Display pcb – electrical diagrams Pag. 74/86...
  • Page 75 ELETTRONICA TELECOMUNICAZIONI S.p.A. Pag. 75/86...

  • Page 76: Web Module

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 13 Web module This module present inside the CTX exciter allows the control of all the main parameters of the unit through web server, only using a LAN connection with RJ 45 interface. No special software is requested because the access is with a normal web browser (Internet Explorer 6+) protected with password and accessible only with the IP address given to the customer at the moment the equipment arrive to him.
  • Page 77 ELETTRONICA TELECOMUNICAZIONI S.p.A. Web server board – electrical diagrams Pag. 77/86...

  • Page 78: 10 Mhz Reference Oscillator

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 14 10 MHz Reference oscillator This module has an OCXO 5MHz/10MHz to grant a high stability to the oscillator: this can be loked to an external reference of 5MHz/10MHz precision such as, for example a GPS receiver. In such way the external reference determines the precision and the stability of the whole system.
  • Page 79 ELETTRONICA TELECOMUNICAZIONI S.p.A. 10 MHz reference oscillator – electrical diagram Pag. 79/86...

  • Page 80: Switching Power Supply Board (Model Rs 150-24)

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 15 Switching power supply board (model RS 150-24) This power supply converts the mains 220 VAC into the +24 VDC voltage for the supply of the internal boards (Audio/Video modulator, auxiliary switching power supplies, Precorrector and Up converter board, Final amplifier).
  • Page 81 ELETTRONICA TELECOMUNICAZIONI S.p.A. Pag. 81/86...

  • Page 82: Auxiliary Switching Power Supply Board Nr 1 (Model 001-000070-00)

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 16 Auxiliary switching power supply board nr 1 (model 001-000070-00) This board supplies with +/- 15VDC the Audio/Video Modulator board and with -15VDC and +5VDC the Precorrector and Up-converter board Switching board layout Parts list Item Quantity Reference Part PCB Footprint...
  • Page 83 ELETTRONICA TELECOMUNICAZIONI S.p.A. Item Quantity Reference Part PCB Footprint ______________________________________________________________________________ 3.3nF 100V 470uF 330uF C24,C21 10uF DL2,DL1 D1,D3,D4 SB360 SB560 1N4007 1N5819 L1,L3 150uH 120uH 100uH R2,R14 R11,R3 TRIM R4,R8 9K09 16K9 R7,R9,R12 4K87 8K66 L4973 LM2591 L7805 L7905 Pag. 83/86...
  • Page 84 ELETTRONICA TELECOMUNICAZIONI S.p.A. Electrical diagram (001-000070-00) Pag. 84/86...

  • Page 85: Auxiliary Switching Power Supply Board Nr 2 (Model 0104-010)

    ELETTRONICA TELECOMUNICAZIONI S.p.A. 17 Auxiliary switching power supply board nr 2 (model 0104-010) This board supplies with + 15VDC the 1W preamplifier board, the 10 MHz reference board and the Precorrector and Up-converter board. Switching board layout Parts list Item Quantity Reference Part...
  • Page 86 ELETTRONICA TELECOMUNICAZIONI S.p.A. Item Quantity Reference Part PCB Footprint ______________________________________________________________________________ 150uH MORS2 9K1 1% 20K 1/4W 12K 1/4W 4K7 1/4W 1K 1/4W L4973 Electrical diagram Pag. 86/86...

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