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]
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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
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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.
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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
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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
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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
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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
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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 Ohm or 10 kOhm (balanced or unbalanced) Input level 6dBm ± 6dB for ± 50kHz frequency deviation
2) Audio modulation characteristics Modulation FM (F3) with maximum deviation ±50kHz Pre-emphasis 50μs or 75μs Amplitude / frequency response 30Hz ± 15kHz ± 0,5dB Harmonic distortion < 0,1% (30Hz ÷ 15kHz by ± 50kHz deviation) Intermodulation d2< 0,3%, d3 < 0,5% between 15kHz and 100kHz at ± 50kHz total deviation S/N ratio > 65 dB Separation between channels > 75 dB Common mode rejection ratio of audio inputs (balanced mode) > 56 dB
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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. Claims for damaged equipment must be promptly filed with the carrier or the carrier may not accept the claim. The contents of the shipment should be as indicated on the packing list. If the contents are incomplete, or if the unit is damaged electrically or mechanically, notify both the carrier and DB Elettronica.
4 Installation and switching on procedure
CAUTION: Before turn the equipment on, ensure that all RF Loads, RF cables and connectors are properly connected. To prevent damage to the amplifiers, it is essential that either the feeder and antenna system or the dummy load have a good in band return loss. Failure to observe the above caution and also the installation instructions of this amplifier may cause damages to the amplifiers for which DB Elettronica cannot be considered responsible. n PREVENTION OF ACCIDENTS When it is used in normal applications and within the parameters defined in the technical specifications, this equipment does not endanger health and safety, provided that normal operating and engineering safety practices are observed and that it is used only by authorized, trained and qualified personnel.
o THERMIC AND ENVIRONMENTAL CONDITIONS
- A too high environmental temperature (in any case not higher than 45°C) shall cause a non- adequate rack cooling putting the equipment in hard working conditions. - An air conditioner should be installed to keep the room temperature constant even in case of external temperature variation.
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DB ELETTRONICA TELECOMUNICAZIONI S.p.A. pSWITCHING 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; • Connect a dummy load of at least 50 W on the RF output of the unit in case the CTX is used as stand alone, or connect a dummy load properly dimensioned at the total output of the transmitter in case the CTX is a driver unit; • Connect the CTX to the mains (220 VAC ± 10%, 50/60 Hz) and switch on it: the output power level set in the factory is 0 W. Wait up the message STATUS OK appears on the display; • Set the unit to ALC mode (CONFIGURATIONS MENU -> OUTPUT OPTIONS -> AGC MODE); • Increase the output power up to the desired level (depending on the fact that the unit is used as stand alone or as driver for a transmitter) setting the value in the menu CONFIGURATIONS MENU -> OUTPUT OPTIONS -> RF OUTPUT (AGC); • If you have at your disposal a signal demodulator, connect it to the RF MONITOR connector (of the CTX unit if it works as stand alone otherwise the one of the transmitter) and adjust the SYNC value up to have the 100% sync in the output of the unit; • Adjust the Video level up to have 1Vpp; • Adjust the deviation of the unit to optimize the transmission: normally it is factory set depending on the standard (50 Hz for the PAL and SECAM standards, 25 Hz for the NTSC); • Check the voltages on the page STATUS MENU -> VOLTAGE INFO and verify that all the values are correct; • The setting of the unit is complete: switch off the unit, disconnect the dummy load from the output and connect the output to the antenna system. Disconnect the audio and video generators and connect the signal that will be transmitted on-air. Switch on the unit again and check that all the parameters are ok and the unit shows the message STATUS OK on the first page of the menu.
NOTE: in case the frequency is not at the correct value, it is possible to adjust the value of the 10 MHz external reference using the trimmer on the rear panel up to have the right frequency value. Pag. 10/86
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5 Menu Map
STANDBY
CTX VIDEO TRANSMITTER OL UNLOCK
CTX VIDEO TRANSMITTER OK
CONFIGURATIONS MENU
SYSTEM 0.X.X
OUTPUT Options 0.0.X
AUDIO 1 SUBCARRIER 0.0.0 On
AUDIO 2 SUBCARRIER 0.0.1 On
AUDIO 1 LOW PASS 0.0.2 On
AUDIO 2 LOW PASS 0.0.3 On
AUDIO 1 PREENPHASY 0.0.4 On
AUDIO 2 PREENPHASY 0.0.5 On
AUDIO 1 Deviation 0.0.6 050 KHz
AUDIO 2 Deviation 0.0.7 050 KHz
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AUDIO Options 0.1.X
VIDEO WHITE CLIPPER 0.1.0 On
VIDEO SYNC LEVEL 0.1.1 30 %
VIDEO LEVEL 0.1.2 0500 mV
VIDEO Options 0.2.X
VIDEO Carrier Frequency 0.2.0 725250000 Hz
RF LEVEL (ALC) 0.2.1 8.2 Wps
RF LEVEL (MLC) 0.2.2 8.2 Wps
AGC type 0.2.3 ALC
IF Precorrector 0.2.4 On
RF Switch 0.2.5 On
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STATUS MENU
CONFIGURATIONS 1.X.X
VOLTAGE Info 1.0.X
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 1.1.X
1.1.0 VIDEO Amplitude: 1024 mVpp
VIDEO IF Level: -12dBm 1.1.1 VIDEO PLL : LOCKED
VIDEO Info 1.2.X
Heatsink temperature: 35°C 1.2.0 FWD Power 5.2 Wps RFL Power 0.4 Wps
RF IN Amplif. Stage: -2dBm 1.2.1 VIDEO Carrier Freq.: 725250000 Hz
OUTPUT Info 1.3.X
Meas. +24V: 23.8V 1.3.0 Meas. +15V: 14.9V Meas. -15V: -14.7V
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VOLTAGE Info 1.4.X
Alarms List 1.4.0 NO VIDEO INPUT
ALARMS: 1.5.X
WARNINGS list 1.5.0 NOT ENABLED
SYSTEM MENU STATUS 2.X.X
SYSTEM Info 2.0.X
Remote: 2.0.0 Off
SYSTEM Control 2.1.X
NTSC STANDARD 2.1.0 Rev. Hw 1.0 Fw 1.0/1.0
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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
OK
The indication STATUS OK means that the transmitter is correctly functioning and the frequency is locked, the ON led on the front panel will be the only one switched on. The navigation on the menu is done through the front panel buttons on the right of the LCD display. On each page the indication X.X.X on the top right corner indicates the depth of the navigation: each submenu starts from page 0. Each page of the menu indicates on the top the previous sub-menu, and in the second row the actual selected menu (the one where you will enter pressing the button ►)
SYSTEM 0.X.X
To enter a menu it is sufficient to press ►. For changing a value in a page it is sufficient to press OK: press ▲ or ▼ to modify the value and press OK to confirm the modification. On the page it will appear a message asking for SAVE or EXIT: press SAVE to confirm the modification just made (the value will be stored after the message UPDATING SYSTEM…) or EXIT to disregard it.
6.2 Configurations menu
The Configurations menu allows the setting of the main parameters of the unit (audio 1 and 2 parameters, video parameters).
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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 On
The second one indicates if the low pass filter is inserted or not: in case of MONO transmission the low pass filter is always inserted.
AUDIO 1 LOW PASS 0.0.2 On
The third page indicates if the preemphasis is inserted or not.
AUDIO 1 PREENPHASY 0.0.4 On
The 4th page indicates the level of the deviation of the audio subcarrier.
AUDIO 1 Deviation 0.0.6 050 KHz
VIDEO OPTIONS In this menu the main parameters related to the video can be set. The first page indicates if the white clipper is inserted or not.
VIDEO WHITE CLIPPER 0.1.0 On
Normally the default value is ON.
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The 2nd 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).
VIDEO SYNC LEVEL 0.1.1 30 %
The 3rd page indicates the level of the input video signal: the value depends on the video source used by the customer. Normally the video level is set to 1 Vpp.
VIDEO LEVEL 0.1.2 0500 mV
OUTPUT OPTIONS This menu allows to set the parameters related to the RF output signal. In the first menu page the output frequency can be set with 1 Hz steps. The frequency is expressed in Hz.
VIDEO Carrier Frequency 0.2.0 725250000 Hz
NOTE: in case of change you need to retune also the output filter to have the correct lock and transmission of the signal. For more information refer to the paragraph related to the frequency change.
In the 2nd page the RF output level in ALC mode can be set. In case the unit is in ALC mode this value correspond to the RF output power of the CTX unit.
RF LEVEL (ALC) 0.2.1 8.2 Wps
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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 3rd 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).
AGC type 0.2.3 ALC
In the 4th page it is possible to decide if the IF Precorrector must be inserted or not.
IF Precorrector 0.2.4 On
In the 5th page it is possible to decide if the CTX is used as modulator or as amplifier unit. If the CTX is used as complete modulator (and so to modulate the signal and amplify the 0 dBm up to 5W) the RF Switch must be OFF (internal generator) while if the CTX is only used as amplifier of an external signal the RF Switch must be ON.
RF Switch 0.2.5 On
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6.3 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.
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
VIDEO INFO In this submenu all the information related to the video signal are indicated: Amplitude level, IF level, if the PLL is locked or not.
1.1.0 VIDEO Amplitude: 1024 mVpp
VIDEO IF Level: -12dBm 1.1.1 VIDEO PLL : LOCKED
OUTPUT INFO In this submenu all the information related to the normal functioning of the unit are indicated: heatsink internal temperature, forward and reflected power, RF input amplifier stage, frequency. Heatsink temperature: 35°C 1.2.0 FWD Power 5.2 Wps RFL Power 0.4 Wps
RF IN Amplif. Stage: -2dBm 1.2.1 VIDEO Carrier Freq.: 725250000 Hz
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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. +24V: 23.8V 1.3.0 Meas. +15V: 14.9V Meas. -15V: -14.7V
ALARMS The possible cause of alarm status are indicated in this page.
WARNINGS The messages related to the status of the equipment or cause of blocking of the output not related to an alarm.
6.4 System menu
The System menu allows the change of the mode from LOCAL to REMOTE and the visualization of the main data of the unit (standard, hardware and firmware versions).
SYSTEM CONTROL In this page it is possible to set the unit in the REMOTE or LOCAL mode. Normally it is set in REMOTE OFF. When the REMOTE mode is set no modification of the parameters of the unit is allowed from the front panel.
Remote: 2.0.0 Off
SYSTEM INFO In this page it is possible to visualize which is the actual analog standard of transmission (PAL / NTSC / SECAM). In the second row it is also indicated the Hardware and the Firware versions.
NTSC STANDARD 2.1.0 Rev. Hw 1.0 Fw 1.0/1.0
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7 Frequency change
In case of change of the transmitter operating frequency the following units need be adjusted:
1) Driver unit: the setting of the TX output operating frequency is made from the front panel display CONFIGURATIONS MENU -> OUTPUT OPTIONS -> VIDEO CARRIER FREQUENCY. 2) Output BandPass-Notch Filter: it needs to be readjusted to obtain a clean output spectrum in order to meet international requirements.
All amplification circuits are broadband (from 470 to 860 MHz), then the power amplifiers don’t need any adjustment.
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 Otherwise remove the bottom cover of the CTX unit and connect the TRACKING output connector of a spectrum analyser with the FILTER INPUT connector and then connect the FILTER OUTPUT connector with the RF INPUT of the analyser as indicated in the picture here below:
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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.
Fig. 7.1 – BPF/O LAYOUT
CN1 CN2
L6
L1 L2 L3 L5 L7
L4 L8
TC1 TC2 TC3 TC4
Fig. 7.2 – ELECTRICAL DIAGRAM
CN2 Smb ( OUT )
CN1 Smb L2 L3 L4 L6 ( IN ) 2 coil L5
L1
TC1 TC2 TC3 10pF 10pF 10pF L8 L7
TC4 10pFPag. 22/86
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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
DB 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.
Video modulation The essential functions of this part are the following: * DC restoration circuit, fixing and maintaining a constant operating point of the modulator; * Additional video signal processing comprising corrections of linearity, differential phase, differential gain and white clipping; * Proper amplitude modulation of the IF vision carrier with the formerly processed video signal. * The modulation is effected in a Double Balanced Mixer giving at the output a double-sideband spectrum; * The required Vestigial-Sideband spectrum is achieved by the successive SAW filter; * The generation of the IF Vision carrier is made through a quartz, phase-locked to reference signal; * The combination of IF Vision signal with IF sound signal.
Audio modulation The audio modulation part performs the following functions: * Linear correction of the audio signals (pre-emphasis, low pass filter); * FM modulation of the carriers (A1, A2); * Combining of the two IF sound FM modulated carriers (in case of two carrier system).
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Audio and video modulator layout
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Electrical diagrams
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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. This operation (“precorrection”) produces a modulated intermediate frequency signal from the linearity precorrector, in order to compensate the possible non-linearity of amplitude and phase which may have been introduced during the various stages of power amplification. Such non-linearity is responsible for the following distortions: differential gain differential phase incidental phase modulation static non-linearity intermodulation (mostly significant in the amplifiers for normal amplification to the audio video carriers) The precorrection of the modulated intermediate frequency signal is effected according to the “I/Q” method: according to this method, the modulated intermediate frequency signal outputting from the modulator is firstly separated into two components in phase and by 90°(quadrature), thereafter each component is applied to a circuit with gain which is in non-linear function to the amplitude of the input signal. The outputs of these circuits are then re-combined. The possibility of changing the amplitudes of the two components separately in phase and quadrature, produces a non linear deviation of the phase and amplitude of the resultant signal.
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9.2 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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
The trimmers for the adjustment are the following ones:
Nr. Trimmer Description 1 TR 2 Adj of the level of the intervention of the VSWR protection 2 TR 29 Adj of the display FWD measure 3 TR 31 Adj of the display REFL measure 4 TR 27 Adj of the display Up converter RF level measure (normally 0 dBm) 5 TR 7 Adj of the RF output level in case of derating (external command for the load unbalance) 6 TR 9 Adj of the RF output level in case of CW (output power when the video signal is missing) 7 TR 10 Not used 8 TR 11 Not used 9 TR 6 Adj of Power limit threshold 10 TR 16 LV (Level) 11 TR 18 SL (Slope) SYNC 12 TR 20 PH (Phase) 10 TR 16 LV (Level) 11 TR 18 SL (Slope) BLACK 12 TR 20 PH (Phase) 10 TR 16 LV (Level) 11 TR 18 SL (Slope) GREY 12 TR 20 PH (Phase) 10 TR 16 LV (Level) 11 TR 18 SL (Slope) WHITE 12 TR 20 PH (Phase)
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Pre-correction and up converter board top view
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Precorrection and Up-converter board electrical diagrams
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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 ______
1 8 C1,C3,C5,C12,C17,C20,C21, 33pF 0603 C22 2 4 C2,C4,C6,C16 10nF 0603 3 1 C7 470pF 0603 4 1 C8 22pF 0603 5 2 C10,C9 330pF 0603 6 4 C11,C13,C14,C15 1nF 0603 7 1 C18 4.7uF 4X5.5 SMD 8 1 C19 47uF 6.3X5.5 SMD 9 5 C23,C24,C25,C27,C28 100pF 0603 10 9 L4,R5,R11,R14,R26,C26, NC 0603 C29,R34,R35
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Item Quantity Reference Part PCB Footprint ______11 2 REF,IF SMB INPUT SMB 90° 12 1 J1 FLAT 10 VIE 5X2 13 1 J2 J2 PS3 0603 14 1 J3 J3 PS3 0603 15 2 L1,L2 22nH 0603 16 1 L3 TC4-19+ 17 1 L5 TC1-1-13M 18 2 Q2,Q1 BC847 SOT23 19 1 RF SMB OUTPUT SMB 90° 20 4 RX1,RX2,RX3,RX4 50R uSTRIP 21 1 R1 12K 0603 22 6 R2,R10,R13,R24,R27,R32 0R 0603 23 2 R4,R3 820R 0603 24 5 R6,R9,R15,R17,R22 1K 0603 25 4 R7,R16,R18,R23 1K5 0603 26 1 R8 51K 0603 27 1 R12 10K 3214W 28 4 R19,R20,R21,R36 10K 0603 29 2 R29,R31 330R 0603 30 1 R30 18R 0603 31 1 U1 RF2052 QFN32 5X5 32 1 U2 UA78M33 SOT223 33 1 Y1 OSC 10MHz VCTCX0
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Electrical Diagram
+5V IF INPUTSMB RF OUTPUTSMB +3.3VDC R31 330R R10 0R R11 NC C15 1nF R30 18R RX3 50R uSTRIP R29 330R R12 10K R32 0R C29 NC RX4 50R uSTRIP 4 1 C28 100pF C27 100pF Y1 OSC 10MHz R27 0R 3 2 C26 NC 4 6 L5 TC1-1-13M C24 100pF C3 33pF C25 100pF +3.3VDC R9 1K C4 10nF 6 4 3 1 C14 1nF C1 33pF RESETB +3.3VDC C2 10nF C13 1nF L3 TC4-19+ R34 NC 3 2 1 C23 100pF R14 NC +3.3VDC 24 23 22 21 20 19 18 17 R35 NC R24 0R R26 NC
NC3 NC2
NC4
RFIP2P NC1 RFIP2N 25
R13 0R L4 NC 16
RFOP1P
RFOP1N NC5
DIG_VDD NC0
ANA_VDD 26 15
RFOP2N RFIP1N
27 14 REF INPUTSMB
RFOP2P RFIP1P
28 +3.3VDC C16 10nF 13
RESETB GND
29 U1 12
ENX XTALIPN
30 11 C11 1nF RF2052
SCLK XTALIPP
31 10
SDATA MODE
32 9 C12 33pF ENBL INDP INDN REXT ANA_DEC LFILT1 LFILT2 LFILT3 1 2 3 4 5 6 7 8 C22 33pF C10 R7 1K5 330pF C21 33pF C20 33pF R23 1K5 R4 820R C9 330pF R18 1K5 R6 1K R5 NC Q2 BC847 R22 1K R3 820R R17 1K C8 22pF Q1 BC847 MODE C17 33pF R1 12K C7 470pF R16 1K5 R2 0R R21 10K R19 10K R36 10K R20 10K R15 1K C6 10nF C5 +5V +3.3VDC 33pF ENX SCLK ENBL MODE SDATA +5V +3.3VDC +3.3VDC +3.3VDC R8 51K +12V 1 3 5 7 9 RX1 50R uSTRIP RX2 50R uSTRIP J1 2 4 6 8 10 FLAT 10 VIE 10 FLAT J2 J3 C18 4.7uF + ENX L1 22nH L2 22nH SCLK ENBL SDATA RESETB +3.3VDC 3
UA78M33
COM 2 COM IN OUT U2 1 C19 47uF +
+12V
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11 5 Wps Final Amplifier Module (Driver)
This 5 Wps final amplifier module (driver) is composed from three ultra-linear amplifier stages of power for the UHF Band (IV- V band). This stage can be used for the amplification of analog or digital signals thanks to the ultra-linear characteristics of the devices present on the boards: in this way it is possible to obtain up to 7 Wps in analog mode (that correspond to 2.6 Wrms in digital standards).
Technical Characteristics
- Output RF power 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) < -60 dB - Gain about 50 dB (totally) - Return loss (in the channel) < -22 dB - Input/output connector SMB / SMA 50 Ω
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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 ______
1 5 C1,C2,C3,C4,C6 1nF 0603 2 1 C5 2,7pF 0603 3 1 C7 10µF 25V 4 2 C10,C8 100nF 0805 5 3 C9,C11,C13 1nF 0805 6 1 C12 100pF 0805 7 1 L1 220nH 1210 8 1 L2 4,7nH 0603 9 1 L3 100nH 1210 10 1 Q1 GALI 05+ 11 1 Q2 AH202F 12 4 R1,R3,R4,R6 330R 0603 13 2 R5,R2 18R 0603 14 4 R7,R8,R9,R10 390R 1206
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DB ELETTRONICA TELECOMUNICAZIONI S.p.A. RF Final Amplifier – Stage 1 of amplification pcb (1W output) Electrical Diagram
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DB ELETTRONICA TELECOMUNICAZIONI S.p.A. Band UHF RF Final Amplifier – Last stage of amplification pcb 5 Watt output (001-000117-01) Lay-out
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DB 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 C1 C-EL 8x10 220µf 35V 1 C2, C6 CASE B Tantalio 10µF 20V 2 C4,C29 CASE B 1nF HQ 2 C3, C8, C10, C25 C_0805 1nF 4 C5, C7, C9, C22, C24, C26, C30 C_0805 10nF 7 C11 C_0805 470nF 25V 1 C12, C15 C_0805 HIGH Q 3,3pF 2 C13 C_0805 HIGH Q 22pF HQ 1 C14, C20 C_0805 HIGH Q 3.3p 2 C16, C17, C34, C36 C_0805 HIGH Q 18p HQ 4 C18, C19, C35, C37 C_0805 HIGH Q NC 4 C21, C28 C_0805 470nF 2 CMB1, CMB2 ANAREN 11304 ANAREN 11304 2 D1, D6 LL4148 SOD123/X.85 2 D2 9V1 DSO-C2/X2.3 1 D5, D7 HSMS-2802-BLK SOT23 2 IC1 7812 D2PAK 1 L1, L4 L L_0603 2,2n 2 L2, L3 L L_0603 2.2n 2 P1 HDR1X8 1 Q1, Q2 MRF282Z MRF282 2 R1 R_1206 1K 1 R2, R28 BOURNS 3214W 10k 2 R3, R16 R_0805 470R 2 R4, R25 R_0805 470 2 R5, R24 RESC6332L 50R 8W 2 R6, R11 BOURNS 3214W 1K 2 R7, R12 R_0805 100R 2 R8, R10, R19, R31, R32 R_0805 10K 5 R9, R17 R_0805 680K 2 R13 R_1206 10K 1 R14 R R_0805 50R 1 R15, R26 R R_0805 NC 2 R18, R27 R R_0805 NC 2 R23 R R_0805 0 1 R20 R R_0805 NC 2 R21, R22 R_0805 49.9 2 R29, R30 R R_0805 470 2 U1 LM358AM M08A_N 1
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Band UHF RF Final Amplifier – Last stage of amplification pcb 10/20 Watt output Lay-out
C35 C36
CMB1 R21 CQ C9 C10 C17 C18 R CQ C7 C8 C22 Ctan Ctan C23 R23 R24 C27 R IC2 C28 R4 R2 R7 C11
C19 D9 R o i CQ CQ CQ R1 D8 R6 R19 C16 C15
R IC1 i o R3 R5 CQ C42 C48 D1 D2 D3 D5 C30 R9 R10 C12
MRF9030 D4 C20 MRF9030 1 C29 C D6 R8 R 3 HP2802 R Ctan 2 C31 1 CQ C13 C21 Q2 3
C4 HP2802 2
R R14 D7 R11 R C
C43 C49 C32 R13 CQ C14 R R
R R15 R12 R CQ C44 CQ C5 C25 C50 R16 R18 R
C6 C37 C38 R17 CQ C C CMB2 C33 C34 R20 R22
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Item Quantity Reference Part PCB Footprint ______
1 1 CMB1 DB 0305061 COMBINER Splitter 2 1 CMB2 DB 0305061 COMBINER COMBINER 3 5 C1,C2,C6,C26,C27 15pF HQ 1210 4 1 C3 5,6pF H.Q. 1210 5 2 C24,C4 1,5pF HQ 1210 6 3 C5,C25,C45 4,7pF HQ 1210 7 6 C7,C16,C22,C29,C33,C34 10nF 1206 8 8 C8,C9,C11,C13,C18,C19, NC 1206 C21,C23 9 3 C10,C17,C31 10µF Tant. TANT B 10 3 C12,C15,C20 1nF 1206 11 1 C14 220µF 35V SMD D 12 2 C48,C24 10pF HQ 1210 13 1 C28 5,6pF HQ 1210 14 2 C30,C32 470nF 1206 15 2 C36,C35 100R 1W 2512 16 2 C38,C37 NC 2512 17 1 C39 4,7pF H.Q. 1210 18 1 C40 12pF H.Q. 1210 19 1 C41 3,6pF H.Q. 1210 20 2 C49,C43 8,2pF HQ 1210 21 2 C44,C50 2,2pF HQ 1210 22 1 C46 3,6pF HQ 1210 23 1 C47 12pF HQ 1210 24 6 D1,D2,D3,D4,D8,D9 LL4148 SOD80 25 1 D5 9V1 SOD80 26 2 D7,D6 HSMS-2802-BLK SOT123 27 2 IC1,IC2 78M12 DPACK 28 1 IC3 TS922 ID SO8 29 18 L8,L9,L10,L11,L12,L13, Stampato L14,15,L16,L17,L18,L19, L21,L22,L23,L24,L25,L26 30 1 L20 LINEA 50R 31 2 Q1,Q2 MRF9030 32 4 R1,R2,R4,R6 470R 1206 33 2 R5,R3 2k Multi G SMD 34 1 R7 390R 1206 35 4 R8,R9,R11,R13 10k 1206 36 2 R14,R10 680K 1206 37 1 R12 0R 1206 38 2 R15,R16 100R 1206 39 2 R16,R17 1K Multi G SMD 40 2 R20,R19 56R 1206 41 1 R21 NC 40W 42 1 R22 50R 40W 43 1 R23 2R2 1210 44 1 R24 2R2 1206
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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.
Display indications: • Forward and reflected power • Standard and frequency of transmission (with possibility to set the frequency from front panel) • Audio and Video parameters (pre-emphasis, filtering, number and status of the audio subcarriers…) • Supply DC voltages • IF level • Alarms
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Display pcb Lay-out (Front and Rear views)
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Display pcb – electrical diagrams
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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. All the information available on the display of the CTX unit are present also on the web page, and it is also possible to control the unit sending commands to change the functioning parameters (like the transmission frequency).
Web server board – layout
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Web server board – electrical diagrams
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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. When the source of the external reference misses, the OCXO inside the unit guarantees the operation of frequency syntheses thanks to the internal stability.
10 MHz reference oscillator - layout
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10 MHz reference oscillator – electrical diagram
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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).
FEATURES:
• Protections:Short circuit/Over load/Over voltage • Cooling by free air convection • LED indicator for power on • 100% full load burn-in test • All using 105°C long life electrolytic capacitors • Withstand 300VAC surge input for 5 second • High operating temperature up to 70 • Withstand 5G vibration test • High efficiency, long life and high reliability
DC voltage 24V Rated current 6.5A Current range 0 – 6.5A Rated Power 156W Ripple & noise (max) 120mVp-p Voltage ajd range 22.8 – 26.4V OUTPUT Voltage tolerance ± 1.0% Line regulation ± 0.5% Load regulation ± 0.5% Setup 800ms, 20ms, 50 ms/230VAC Rise time 1200ms, 30ms/115VAC at full load Hold time 28 ms/230 VAC, 20ms/115VAC at full load Voltage range 88 – 264 VAC Frequency range 47 – 63 Hz Efficiency 86% INPUT AC current 3A/115VAC 2A/230VAC Inrush current (max) Cold start 40A/230VAC Leakage current <2mA/240VAC Overload 110 - 150% rated output power Over voltage 27.6 – 32.4 V PROTECTION Protection type: Hiccup mode, recovers automatically after fault condition is removed Working temperature -25 ÷ +70°C Working humidity 20 – 90 % RH not condensing Storage temperature, humidity -40 ÷ +85 °C, 10 ÷ 95% RH ENVIRONNEMENT Temp. Coefficient ±0.03%/°C (0÷50°C) Vibration 10 – 500 Hz, 5G 10min/1cycle, period for 60 min. each along X,Y,Z axes MTBF 244 Khrs min OTHERS Dimension 199/98/38 mm (L/W/H) Weight 0.7 kg
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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 ______
1 4 CN1,CN2,CN3,CN4 MSM02041 2 2 C1,C18 220nF 63V 3 6 C2,C13,C20,C22,C23,C25 100nF 100V 4 1 C3 1000uF 63V 5 2 C4,C19 220uF 25V 6 1 C5 1nF 100V 7 2 C14,C6 470nF 63V 8 1 C7 1uF 50V 9 1 C8 22nF 100V 10 1 C9 220pF 11 3 C10,C11,C12 100uF 40V
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Item Quantity Reference Part PCB Footprint ______12 1 C15 3.3nF 100V 13 1 C16 470uF 63V 14 1 C17 330uF 35V 15 2 C24,C21 10uF 35V 16 2 DL2,DL1 LED 3mm 17 3 D1,D3,D4 SB360 18 1 D2 SB560 19 1 D5 1N4007 20 1 D6 1N5819 21 2 L1,L3 150uH 22 1 L2 120uH 23 1 L4 100uH 24 1 R1 20K 1% 25 2 R2,R14 NC 26 2 R11,R3 1K TRIM 27 2 R4,R8 2K2 28 1 R5 9K09 1% 29 1 R6 16K9 1% 30 3 R7,R9,R12 4K87 1% 31 1 R10 8K66 1% 32 1 R13 1K 1% 33 1 U1 L4973 34 1 U2 LM2591 35 1 U3 L7805 36 1 U4 L7905
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Electrical diagram (001-000070-00)
C4 220uF 25V + +15V +12V -12V +5V -5V 2 Rev Sheet of 2 1 2 1 2 1 Drawing Approved L2 120uH 19.03.09
3
+
GND VOUT 2 GND 12 9 3 2 VIN U4 L7905 1 VFB OUT OUT BOOT R11 1K R14 NC
C23 100nF 100V
GND
15
GND
14 C15 3.3nF 100V
GND
13 L3 150uH
INH
10
GND
6 R10 1% 8K66 TC-151M-5A-8026
GND
5 -12V GND 4 D4 SB360 VCC VCC OSC SS 5V1 COMP SYNC U1 L4973V3.3 7 8 1 18 17 16 11 C8 22nF 100V R5 9K09 1% +5V D6 1N5819 C22 100nF 100V 2 C9 220pF
R13 1% 1K
FB OUT 4
C21 10uF 35V
GND + C7 1uF 50V 3 + 3 VIN ON/OFF C6 470nF 63V U2 LM2591
1 5
GND VOUT 2 R12 4K87 1% GND R1 20K 1% C5 1nF 100V VIN U3 L7805 1 C14 470nF 63V R9 4K87 1% C2 100nF 100V C20 100nF 100V D1 SB360 C3 1000uF 63V D3 SB360 C16 470uF 63V +12V + + VIN VIN VIN 1 2
CN1 MSM02041
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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 PCB Footprint ______
1 1 B1 KBL04 2 1 CN1 AMP4 3 1 C0 1nF CER 4 1 C1 1000uF 63V RHOE 5 3 C2,C8,C12 220nF POL 6 1 C3 470nF POL 7 1 C4 1uF 50V 8 1 C5 220pF CER 9 1 C6 22nF CER 10 1 C7 2n7F CER 11 3 C9,C10,C11 100uF 40VRHOE 12 1 DL1 LED V 13 1 D0 1N4007 14 1 D1 GI_SB560 15 1 D2 KE56A 16 1 FA1 FAST4 17 4 GNDSQ1,GNDSQ2,GNDSQ3, GNDSP1 GNDSQ4
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Item Quantity Reference Part PCB Footprint ______18 1 L1 150uH 19 1 MR1 MORS2 20 1 R1 9K1 1% 21 1 R2 20K 1/4W 22 1 R3 12K 1/4W 23 1 R4 4K7 1/4W 24 1 R5 1K 1/4W 25 1 U1 L4973
Electrical diagram DL1 POS NEG LED V of 1K 1/4W1K R5 11 2 1 MR1 MORS2 GNDSQ1 GNDSP1 GNDSQ2 GNDSP1 GNDSQ3 GNDSP1 GNDSQ4 GNDSP1 R3 R4 12K 1/4W12K 1/4W4K7 C12 220nF POL ALIM. SWITCHING P12V 3.5A P12V SWITCHING ALIM. 0104_010.SCHFriday , June 04, 2004 0 + B DB ELETTRONICA TELECOMUNICAZIONI S.P.A. 38 LISBONA, VIA -PADOVA- CAMIN Z.I. SUD GIORGIO P.I. 35127 MARCATO PROGETTISTA: GIORGIO P.I. MARCATO DISEGNATORE: Title Size Document NumberDate: Sheet Rev C11 100uF 40VRHOE + C10 100uF 40VRHOE + C9 100uF 40VRHOE L1 150uH C8 D1 220nF POL 12 9 3 2 GI_SB560 VFB OUT
OUT2 BOOT
GND
15
GND
14
GND
13
GND
10
GND
6
GND
5
GND 4 POS POS2 OSC SS 5V1 COMP U1 L4973 7 8 1 17 16 11 C6 R1 9K1 1% 22nF CER C5 220pF CER + C4 1uF 50V C3 470nF POL C7 R2 20K 1/4W 2n7F CER C2 220nF POL D0 1N4007 + C1 1000uF 63V RHOE D2 KE56A 4 3 2 1 CN1 AMP4 POS NEG B1 KBL04 C0 1nF CER FA1 FAST4
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