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CTX 5/10/20 5W/10W/20W Analog TV Exciter UHF Band

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CTX 5/10/20 5W/10W/20W Analog TV Exciter UHF Band DB 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: [email protected] Pag. 1/86 DB ELETTRONICA TELECOMUNICAZIONI S.p.A. INDEX 1 INTRODUCTION.................................................................................................................................................... 3 2 TECHNICAL SPECIFICATIONS......................................................................................................................... 7 2.1 TECHNICAL FEATURES ....................................................................................................................................... 7 3 UNPACKING ........................................................................................................................................................... 9 4 INSTALLATION AND SWITCHING ON PROCEDURE ................................................................................. 9 5 MENU MAP ........................................................................................................................................................... 11 6 FRONT PANEL MENU ........................................................................................................................................ 15 6.2 CONFIGURATIONS MENU .................................................................................................................................. 15 6.3 STATUS MENU .................................................................................................................................................. 19 6.4 SYSTEM MENU ................................................................................................................................................. 20 7 FREQUENCY CHANGE ...................................................................................................................................... 21 8 AUDIO AND VIDEO MODULATOR BOARD ................................................................................................. 24 9 PRECORRECTION AND UP CONVERTER BOARD .................................................................................... 42 9.2 FRONT PANEL TRIMMERS ................................................................................................................................. 43 10 OSCILLATOR AND MIXER ............................................................................................................................... 60 11 5 WPS FINAL AMPLIFIER MODULE (DRIVER) ........................................................................................... 63 12 DISPLAY MODULE ............................................................................................................................................. 72 13 WEB MODULE ..................................................................................................................................................... 76 14 10 MHZ REFERENCE OSCILLATOR .............................................................................................................. 78 15 SWITCHING POWER SUPPLY BOARD (MODEL RS 150-24) ..................................................................... 80 16 AUXILIARY SWITCHING POWER SUPPLY BOARD NR 1 (MODEL 001-000070-00) ............................ 82 17 AUXILIARY SWITCHING POWER SUPPLY BOARD NR 2 (MODEL 0104-010) ..................................... 85 Pag. 2/86 DB 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. The changing of the transmitted frequency is easily possible from the front panel working on the unit directly by software commands that modify the PLL local oscillator settings. It is possible to set whatever frequency inside the IV-V band only setting the desired channel using the front panel buttons, with a precision of 1 Hz thanks to the high precision oscillator present on the up-converter module. It is also possible to have any locking to a 5MHz or 10 MHz external standard oscillator, in order to obtain a high necessary stability ratio (precision offset). The standard setting is for a 10 MHz external reference but it is possible to change the setting for accepting a 5MHz input as indicated in the following paragraphs. All the main parameters of the unit, including the data related to the audio and video input signals, their processing and the output can be monitored in the front panel and also via WEB with a remote control through web browser: an internal board allows the unit to be connected to a LAN using a RJ 45 interface in order to have access to all the functioning parameters of the unit and to send commands working on a web page in a common web browser (Internet Explorer 6+) without the installation of any special software. Pag. 3/86 DB ELETTRONICA TELECOMUNICAZIONI S.p.A. Front View 1 2 3 ALARM WARNING ON BROADCAST MADE IN ITALY CTX - TV EXCITER 4 Rear View 6 8 9 10 11 12 13 7 5 AUDIO 2 AUDIO 1 FUSE 3.15T RF MON. RF OUT IF IN IF OUT OUT LAN IN INPUT OUTPUT INPUT OUTPUT VIDEO RF IN RF OUT INPUT OUTPUT FWD EXT FWD DC OUT ADJ RS485 CTRL OUT 115-230 Vac RF REM 10MHz 50/60 Hz REDUCTION ENABLE 23 22 21 20 19 18 17 16 15 14 1. Front panel leds (ON, WARNING, ALARM) 2. LCD display 3. Front panel buttons (up, down, left, right, OK) 4. External access to the trimmers for the parameters adjustment 5. Mains plug 6. Fuse 7. RF Output N connector (5 W output from the RF amplifier stage) 8. IF Input (for an external IF signal) 9. IF Output (to give the IF internally generated to another equipment) 10. Audio 2 input/output connectors 11. Audio 1 input/output connectors 12. Video input/output connectors 13. LAN port (RJ 45 interface) 14. RS 485 port 15. CNTRL OUT port (it gives NC, NO and common contacts) 16. Enable connector (to enable the unit to function – to be connected to the control logic unit in case it is present on the equipment) 17. 10 MHz external reference connectors (input and output) 18. RF OUT connector – output of the modulation board with 0 dBm level 19. RF IN connector – input of the RF amplifier stage @ 0 dBm in case of external modulation 20. RF REM REDUCTION connector – for the derating function in case of control logic unit present on the equipment 21. EXT FWD connector – monitor FWD signal in case of external AGC 22. FWD DC OUT connector – DC voltage proportional to the RF output power of the CTX exciter Pag. 4/86 DB ELETTRONICA TELECOMUNICAZIONI S.p.A. Internal top view 4 1 2 5 3 7 8 6 1. Web interface board (001-000092-00) 2. Audio/Video Modulator (0001-000109-00) 3. 2nd 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. Switching power supply board nr 2 (0104-010) for the generation of +15V Pag. 5/86 DB ELETTRONICA TELECOMUNICAZIONI S.p.A. Internal bottom view 10 11 9 12 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 DB ELETTRONICA TELECOMUNICAZIONI S.p.A. 2 TECHNICAL SPECIFICATIONS 2.1 Technical Features • All analog TV standards available • Very compact size, modular design: increases reliability and simplifies maintenance operation. • Common amplification sound and vision carriers. • High performance linearity corrector. • Very high MTBF. • Full band coverage without adjustment. • Synthesized local oscillator facility. • Mono/Stereo/Dual sound version available. Environmental data Environment temperature operating range 0°C to +50 °C. Maximum allowable relative humidity 95% Power supply 165 ÷ 280 VAC, single phase 50/60 Hz ±2% Power factor > 0.9 Input/output Connectors Audio input (1) XLR-31, 600Ω Video input (1) BNC, 75 Ω Modulated RF output N, 50 Ω Dimensions and weight Standard 19” 2U – 482x500x90H mm –10kg Operating frequency range 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) 1) Video Input 75 ohm – BNC Input return loss > 35dB (0,25 ÷ 6MHz) Video input level 1Vpp ± 6dB adjustable DC restoration circuit at black porch Pag. 7/86 DB 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 < ± 30nS (within the video band) Sync pulse compression at nominal power < 3% In-band intermodulation (ref. to nominal power with 3 tones method Vc –5dB; Sc –10dB; Cc –17dB) < -60dB Off-band spurious radiation < -60dB S/N ratio (weighted) > 60dB External reference frequency input 5 or 10MHz Local oscillator stability (0 – 50 °C) < 2.5 ppm/year (with optional high stability) < 0.5 ppm/year L.O. frequency resolution 50kHz steps (standard version) 1Hz steps (with DDS precision offset option) 1) Audio Input XLR, two double inputs (stereo, A1, A2) Input impedance 600
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