Elettronika S r l TXUP500 500 Watt Analog TV Broadcast Transmitter User Manual APT139B VEGA Rev0 Date100604

Elettronika S.r.l. 500 Watt Analog TV Broadcast Transmitter APT139B VEGA Rev0 Date100604

Users manual Exciter part 1

VEGAUHF - TV SystemUsers manual CODE: APT139NM2 TITLE: VEGA REV: 0 DATE: 15/02/05
SS 96 Km 11370027 Palo del Colle (Ba) ITALYTel. +39 (0)80 626755Fax +39 (0)80 629262E-mail: elettronika@elettronika.itWeb site: http://www.elettronika.itRegistration number: IT-17686Registration number: IT-24436
IndexIndex ................................................................................................................................... 3Warning .............................................................................................................................. 5Warranty ............................................................................................................................. 6Introduction ....................................................................................................................... 7Content of the manual....................................................................................................... 7Treatment of electrical shock ........................................................................................... 9First-aid ......................................................................................................................... 10 Treatment of electrical burns.......................................................................................... 10 Note ............................................................................................................................... 10Section 1 - Information .................................................................................................... 13 1.1 Description............................................................................................................... 14 1.2 Main features ...........................................................................................................14 1.3 Technical characteristcs........................................................................................... 15 Front panel .................................................................................................................... 16 Rear panel ..................................................................................................................... 17Section 2 - Installation ..................................................................................................... 19 2.1 Menu management ................................................................................................. 20 2.2 Menu description ..................................................................................................... 22 - Multistandard Audio Mono Section .......................................................................... 22 - Multistandard Audio Stereo Section (Option) ........................................................... 25 - Multistandard Video Section .................................................................................... 29 - Multistandard IF Precorrector Section ...................................................................... 31 - Multistandard Local Oscillator Section with Line Offset ............................................ 32 - Multistandard Local Oscillator Section with Field Offset (Option) ............................. 34 - Multistandard Channel Filter Section ....................................................................... 36 - Controller Module Section ....................................................................................... 39 - RF Amplifier Module Section ................................................................................... 43 - BUS Structure Section ............................................................................................. 45 - External Reference Section ..................................................................................... 46 2.3 Alarms and automation............................................................................................ 48 2.4 External AGC: Implementation and details .............................................................. 50 2.5 Power handling ........................................................................................................ 53 2.6 VEGA Factory setting............................................................................................... 54 - Setup Configuration ................................................................................................... 55Section 3 - Diagram ......................................................................................................... 57
Cable diagram ...............................................................................................................58APT139NM2 VEGA - Component list ............................................................................... 59 MTG0071AR1 (Multistandard Audio Mono Modulator Module) .................................... 60 MTG0078AR0 (Multistandard Audio Stereo Modulator Module) ................................... 67 MTG0072AR0 (Multistandard Video Modulator Module) .............................................. 76 MTG0073AR0 (Multistandard IF Precorrector Module) ................................................. 86 MTG0084AR0 (Multistandard UHF Local Oscillator Module) ..................................... 102 MTG0075AR0 (Multistandard UHF Channel Filter Module) ....................................... 108 MTG0079AR0 (Controller odule)................................................................................. 112 MTG0076AR0 (External Referement Module) ............................................................ 118 MTF0088BR0 (15W UHF Amplifier Module)............................................................... 122 SCH0194AR1 (BUS Structure).................................................................................... 130 E0017 (SP300-27 Switching power supply) ................................................................. 133
5WARNINGThe apparatus described in this manual has been designed and manufactured with devices to safe-guard the users. In any case it is recommended that during any operation of installation, maintenance,miscellaneous interventions and calibrations requiring the apparatus to be switched on,THE USER TAKES ALL THEPRECAUTIONS AGAINST INCIDENTSIt is required to use the proper clothes and protection gloves in order to prevent damages from inci-dental contacts with high-voltage parts.The manufacturer declines every responsibility in case the recommendations above are not followed.IMPORTANTThe component lists attached to the relevant electrical diagrams indicate for each item the reference,the description and the type normally used.The Elettronika S.r.l. though reserves the right to use or supply as spare parts components withequivalent characteristics but of a different type, assuring anyway the optimal work of the apparatusin accordance with the specifications.The enclosed monographs are solely owned by Elettronika S.r.l.The use of anything enclosed in this technical manual without explicit authorization given by ElettronikaS.r.l. will be prosecuted by the law.The data and technical characteristics of the apparatus described in this manual are not compelling forthe manufacturer.The Elettronika S.r.l. reserves the right to make, without previous notice, modifications or updates inorder to improve the quality of the product.The general conditions of supply and sale are described in the contracts.The delivery time are in accordance with the products and quantities ordered.
6Summary of warrantyWe, ELETTRONIKA S.r.l., SS096 Km 113 Z.I. PALO DEL COLLE (BA) ITALY, warrant to the ORIGINAL PURCHASER of a NEW product, for aperiod of one (1) year from the date of purchase by the original purchaser (the warranty period) that the new ELETTRONIKA product is free of defectsin materials and workmanship and will meet or exceed all advertised specifications for such a product. This warranty does not extend to any subsequentpurchaser or user, and automatically terminates upon sale or other disposition of our product.Items excluded from this ELETTRONIKA warrantyWe are not responsible for product failure caused by misuse, accident, or neglect. This warranty does not extend to any product on which the serialnumber has been defaced, altered, or removed. It does not cover damage to loads or any other products or accessories resulting from ELETTRONIKAproduct failure. It does not cover defects or damage caused by use of unauthorized modificstions, accessories, parts, or service.What we will doWe will remedy any defect, in material or workmanship (except as excluded), in our sole discretion, by repair, replacement, or refund. If a refund iselected, then you must make the defective or malfunctioning component available to us free and clear of all liens or other encumbrances. The refund willbe equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on theproduct from the date of original purchase. Warranty work can only be performed at our authorized service centers or at our factory. Expenses inremedying the defect will be borne by ELETTRONIKA, including one-way surface freight shipping costs within the United States. (Purchaser must bearthe expense of shipping the product between any foreign country and the port of entry in the United States and all taxes, duties, and other customs fee(s)for such foreign shipments).How to obtain warranty serviceYou must notify us of your need for warranty service not later than ninety (90) days after the expiration of the warranty period. We will give you anauthorization to return the product for service. All components must be shipped in a factory pack or equivalent which, if needed, mayDesclaimer of consequential and incidental damagesYou are not entitled to recover from us any consequential or incidental damages resulting from any defect in our product. This includes any damageto another product or products resulting from such a defect.Warranty alterationsNo person has the authority to enlarge, or modify this warranty. The warranty is not extended by the lenght of time for which you are deprived ofthe use of the product. Repairs and replacement parts are provided under the terms of this warranty shall carry only the unexpired portion of thiswarranty.Design changesWe reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes inproducts previously manufactured.Legal remedies of purchaserThere is no warranty which extends beyond the terms hereof. This written warranty is given in lieu of any oral or implied warranties not containedherein. We disclaim all implied warranties, including without limitation any warranties of merchantability or fitness for a particular purpose. No actionto enforce this warranty shall be commenced later than ninety (90) days after expiration of the warranty period.Warranty for electronic tubesThe warranty applied for electronic tubes is the one given by the manufacturer of the tube. In the event that the product shows anomalies within thedeadline of the validity of the warranty given by the manufacturer of the product itself, the buyer will have to return it to the seller with the neededdocuments and the written description of the defect. The seller will ship the broken tube to the manufacturer in order to effect the necessary technicaltests to find out the cause of the anomaly. Meanwhile the buyer of the tube who needs to use, and as such to replace immediately the product, will haveto buy a new one and provide to the relevant payment, further to the issuing by the seller of a regular commercial invoice. After the adequate tests madeby the manufacturer, should the result be positive, that is confirm the defect in manufacturing, the seller will issue a regular credit note in the name ofthe buyer and return the amount paid. Should the result be negative, that is detect a negligence in the installation or use by the buyer, he will have noright against the seller.Warranty
7INTRODUCTIONThe apparatus described in this manual is the latest of this series, offering high performances, remark-able reliability and a wide range of characteristics, it all at a low cost.Its is easy to install and use. It only takes to follow the installation procedure as shown in this manual:after having removed all from the package, you only have to follow step by step the description in thevarious sections.Before starting to use the apparatus, remember to:read carefully the general safety information contained in this section;follow the instructions for the installation and set up of the apparatus;read all the remaining sections of this manual in order to know well the apparatus and learnhow to obtain the best of its characteristics.CONTENTS OF THE MANUALThe chapter composing this manual contain all the information concerning the use of the apparatus.For more information refer to ELETTRONIKA S.r.l.This manual is made up of different chapters, each made up of various sections. Each individualchapter represents a single apparatus composing the whole station.
8WARNING!The currents and voltages in this equipment are dangerous!Personnel must at all times observe safety regulation!This manual is intended as a general guide for trained and qualified personnel who are aware of thedangers inherent in handling potentially hazaedous electrical and electronic circuits.It is not intended to contain a complete statement of all safety precautions which should be observed bypersonnel in using this or other electronic equipment.The installation, operation, maintenance and service of this equipment involves risks both to personneland equipment, and must be performed only by qualified personnel exercising due care.Elettronika S.r.l. shall not be responsible for injury or damage resulting from improper procedures orfrom the use of improperly trained or inexperienced personnel performing such tasks.During installation and operation of this equipment, local building codes and fire protection standardsmust be observed.WARNING!Always disconnect power before opening covers,doors, enclosures, gates, panels or shields.Always use grounding nsticks and short out highvoltage points before servicing. Never makeinternal adjustments, perform maintenance orservice when alone or when fatigued.Do not remove, short-circuit or tamper with interlock switches on access covers, doors, enclosures,gates, panels or shields.Keep away from live circuits, know your equipment and dont take chances.WARNING!In case of emergency ensure that power has been disconnected.
9A - AIRWAYIf unconscious, open airway lift up neck, pushforehead back, clear out mouth if necessary,observe for breathing.Treatment of electrical shock1) If victim is not responsive follow the A, B, Cs of basic life support.PLACE VICTIM FLAT ON HIS BACK ON A HARD SURFACEB - BREATHINGIf not breathing, begin artificial breathing. Tilthead, pinch nostrils, make airttght seal, 4 quickfull breaths. Remember mouth to mouth resuscita-tion must be commenced as soon as possible.C - CIRCULATIONCheck carotid pulse. If pulseabsent, begin artificial circulation.Approx. 80sec.: 1 rescuer, 15 compressions, 2 quick breaths.Approx. 60sec.: 2 rescuers, 5 compressions, 1 breath.NOTE: DO NOT INTERRUPT RHYTHM OF COMPRESSIONS WHENSECOND PERSON IS GIVING BREATH.Call for medical assistance as soon as possible.
102) If victim is responsive:- keep them warm;- keep them as quiet as possible;- loosen their clothing (a reclining position is recommended).FIRST-AIDPersonnel engaged in the installation, operation, maintenance or servicing of this equipment are urgedto become familiar with first-aid theory and practices. The following information is not intended to bea complete first-aid procedure, it is brief and is only to be used as a reference. It is the duty of allpersonnel using the equipment to be prepared to give adequate Emergency First Aid and thereby pre-vent avoidable loss of life.TREATMENT OF ELECTRICAL BURNS1) Extensive burned and broken skin.- Cover area with clean sheet or cloth (cleansed available cloth article);- do not break blisters, remove tissure, remove adhered particles of clothing, or apply any salve orointment;- treat victim for shock as required;- arrange transportation to a hospital as quickly as possible;- if arms or legs are effected keep them elevated.NOTEIf medical help will not be available within an hour and the victim is conscious and not vomiting, givehim a weak solution of salt and soda: 1 level teaspoonful of salt and 1/2 level teaspoonful of bakingsoda to each quart of water (neither hot or cold).Allow victim to sip slowly about 4 ounces (half a glass) over a period of 15 minutes.Discontinue fluid if vomiting occurs (do not give alcohol).2) Less severe burns - (1st & 2nd degree).- Apply cool (not ice cold) compresses using the cleansed available cloth article;- do not break blisters, remove tissue, remove adhered particles of clothing, or apply salve or ointment;- apply clean dry dressing if necessary;- treat victim for shock as required;- arrange transportation to a hospital as qickly as possible;- if arms or legs are affected keep them elevated.
11UHF - TV SYSTEMVEGAUsers manual
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13_______________________________________________________________________________________________Section 1 - InformationContents:1.1 Description1.2 Main features1.3 Technical characteristics
14VEGAUHF - TV SYSTEM1.1 DESCRIPTIONThe transmitters and transposers in this series VEGA are characterized by high performance and capabilityand by excellent linearity over the entire band thanks to the optimization of the RF circuits.A high degree of reliability is guaranteed, moreover, by the use of oversized cooling devices and by controlcircuits operated by modern microprocessor technologies.These units are used as low-power transmitters or transposers or as driver stages for amplifiers of greaterpower and are available in 2 to 20W versions. The excellent spectral purity of the conversion oscillatorendows these units with an excellent signal/noise ratio of the radiated signal.The synthesized local oscillator allows easy, rapid changing of the transmission channel from the front panel.The offset option allows frequency shifts in 1Hz (CCIR) or 0.999000999Hz (FCC) steps for operation inprecision offset or isofrequency mode in the various television standards. The units are equipped with aninput connector for an external reference signal at 5MHz.1.2 MAIN FEATURES- Modular construction- Programming of local oscillator from front panel- SAW Vestigial filter- Sync restore (SCT)- Group delay precorrection (SCT)- Automatic shite level and sync limiter (SCT)- Multistandard modulator (SCT)- Available in stero/dual sound version- Possibility of use of common and separate carriers
151.3 TECHNICAL CHARACTERISTICSVIDEO PARAMETERSInput impedance 75WInput level 1Vpp ±6dBWhite / Sync level limiter 95%2T K factor < 1.5%Amplitude / frequency response ±0.5dB (throughout the vision band)Differential gain < 5%Differential phase < 3°Group delay ±35ns (throughout the vision band)Sync pulse compression < 3%S/N ratio (weighted) > 60dBPre-emphasis 50ms or 75ms or flatICPM < 3°Luminance non linearity < 4%Field time bar tilt < 2%Line time bar tilt < 2%AUDIO PARAMETERSInput impedance 600W or 10k, selectableInput level 0dBm ±8dB, 0.5dB stepFrequency response (30Hz to 15kHz) ±0.5dB (±0.2 typ.)T.H.D. (30Hz to 15kHz) < 0.4% (better then 0.2% typ.)S/N ratio (unweighted) > 60dBPre-emphasis 50ms or flatStereo / Dual sound operation AvailableStereo Crosstalk > 37dB (better then 40dB typ.)GENERALOuput power 0 to 15W (Adj.)Available standards B, D, G, H, I, K, M, NCooling ConventionalOperating temperature -10°C to +45°CMaximum relative humidity 90%, non condensingMains power supply 90 to 260VACExternal reference frequency input 5MHz or 10MHzOutput impedance 50WOutput connector N FemaleDimensions 3U 19 RackmountWeight 15kgFrequency stability 1ppmI.M.D. at rated output power Better than -60dBc (-63dBc typical)Harmonics -60dB or betterSporious emissions -60dB or betterExternal interfaces Logic and analog signal outputs,enable input, RS485, RS232Specifications and characteristics are subject to change without notice.
16Front panel1 2 53 4 6DESCRIPTION1 Mult. Mono Audio Modulator Module2 Mult. Video Modulator Module3 Mult. IF Precorrector Module4 Mult. UHF Local Oscillator Module5 Mult. UHF Channel Filter Module6 Controller Module
17AUDIO2TELEMEASURESRS485VID EO 5M Hz I N/ OU TIF LINKRF RFRFRear panel1 2 3DESCRIPTION1 RF Amplifier Module2 Power Supply Module3 External Referement Module
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19_______________________________________________________________________________________________Section 2 - OperationContents:2.1 Menu Management2.2 Manu Description2.3 Alarms and Automation
202.1 MENU MANAGEMENTA large number of options of the VEGA TV exciter can be easily and intuitively controlled through the human-to-machine interface on the right side of the VEGA. It is composed by a graphic display and a clickable knob.When the VEGA is switched on it initialise itself and query to all attached boards on bus the release number.During this period the display shows the screen below.After the initialisation the VEGA goes to the main menu which contains the deviation bars of the audio IFcarrier signals and the White and Synch bar of the video signal. The last bar on the bottom is the one of theVCO which shows the position of the control voltage of the local oscillator.
21All of the menus of the VEGA contain a top bar which shows the name of the apparatus, the firmware versionof the display board and the current time, and a bottom bar showing the reading of the output forward andreflected power and a summary of the current menu.Since the number of menus of the VEGA is high, we give hereby a detailed description of all menus.Note that the same firmware works either with the mono audio modulator and the stereo one. The firmwareonly needs to be set to mono or stereo from the relevant menu. Depending on the selection, the look of somemenus may vary.From the default menu, the bar meters menu, the user can navigate to other 2 menus. To navigate the menus,rotate the knob. The presence of a menu on the left or the right of the current one is shown as arrows at the leftor the right respectively.To enter the menu of the individual modules, select the module from the menu with the graphical image ofVEGA, both the rear and the front view. After clicking, a blinking arc will show in what module you can enterclicking on the knob. To change module, rotate the knob.Below are listed all the menus of all modules. Some symbols and functioning are always the same, and are:l The EXIT menu is always on the first position of the leftmost menu and sends back to the default menucontaining the deviation bars. So to go back to the default menu you have always to go all menus left and click2 times, the first for selection and the second for confirmation.l The parameters may be represented in different ways depending on their type. In detail:- the read-only parameters are represented by the name of the parameter and its current value. In case offailure of a parameter, its value blinks;- the parameter which can be set within a range of values are represented by the name of the parameter andits set value, followed by an arrow pointing downward to show that the value is part of a list of possible
22settings;- the parameters which can be continuously set are represented by a bar showing the indication of the currentvalue (light) and of the one set at the factory (dark);- Actions (e.g. "Clear History") are always followed by the ->|<- symbol. By selecting this voice and cofnirming,the action will be executed.l Pressing the knob while in any of the menus turns on a blinking cursor which can be used to select anyparameter simply by turning the control. Then the knob can be pressed again to open the window allowing tochange the selected parameter. In this window the control allows to choose the value, which has then to beconfirmed when requested.2.2 MENU DESCRIPTION- Multistandard Audio Mono SectionEXITClicking on the knob, after selecting this voice, goes back to the default menù.OverloadShows whether there is (Prst), there isnt (Abst) or there was (Trig) an overload of the audio signal. InAbsent and Triggered case, the label blinks.Reset TrigClicking on the knob, after selecting this voice, delete the triggered indication from the overload.ZinClicking on then knob, after selecting this voice, goes into the menu that allows to changethe impedance of the audio signal input connectors from 600Ohm to 10kOhm and back.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
23LimiterClicking on then knob, after selecting this voice, goes into the menu that allows to changethe Enables or Disables the limitation circuit. Rotate the knob to select the desired valueand click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.IFClicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween on and off of the IF. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Emph.Clicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween presence and absence of the emphasis. Rotate the knob to select the desiredvalue and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SourceClicking on then knob, after selecting this voice, goes into the menu that allows to choosewhether to sample the input signal from the front or rear panel. Rotate the knob to selectthe desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
24SCShows the PLL lock or unlock of the subcarrier. In case of unlock, the label blinks.SCDevShows the Deviation in kHz of the subcarrier.AudioLvlClicking on then knob, after selecting this voice, goes into the menu that allows to sets theinput audio signals level. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.IF LevelClicking on then knob, after selecting this voice, goes into the menu that allows to sets theIF level. Rotate the knob to select the desired value and click on it.The actual level is represented by the empty arrow, the full arrow represent the value ofthe factory setting of this level. This 'factory default marker' can help you to set-up the exciter to a good value,without ant instrumentation.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
25- Multistandard Audio Stereo Section (Option)The last menu is showed as in stereo or mono mode settings. If the mode is set for a dual sound audiomodulation the last menu become the one below, because you can select to adjust the audio level to differentvalues.EXITClicking on the knob, after selecting this voice, goes back to the default menu.OverloadL and OveroadRShows whether there is (Prst), there isn't (Abst) or there was (Trig) an overload of the audio left and rightsignal. In Absent and Triggered case, the label blinks.Reset TrigClicking on the knob, after selecting this voice, delete the triggered indication from the overload.ZinClicking on then knob, after selecting this voice, goes into the menu that allows to changethe impedance of the audio signal input connectors from 600W to 10kW and back.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
26LimiterClicking on then knob, after selecting this voice, goes into the menu that allows to changethe Enables or Disables the limitation circuit. Rotate the knob to select the desired valueand click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.IF1Clicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween on and off of the IF1. Rotate the knob to select the desired value and click onit.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.IF2Clicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween on and off of the IF2. Rotate the knob to select the desired value and click onit.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SourceClicking on then knob, after selecting this voice, goes into the menu that allows to choosewhether to sample the input signal from the front or rear panel. Rotate the knob to selectthe desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
27ModeClicking on then knob, after selecting this voice, goes into the menu that allows to choosethe operating mode between mono, stereo or dual sound. Rotate the knob to select thedesired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Emph.Clicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween presence and absence of the emphasis. Rotate the knob to select the desiredvalue and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SC1Shows the PLL lock or unlock of the subcarrier 1. In case of unlock, the label blinks.SC2Shows the PLL lock or unlock of the subcarrier 2. In case of unlock, the label blinks.SC1DevShows the Deviation in kHz of the subcarrier 1.SC2DevShows the Deviation in kHz of the subcarrier 2.IF1 LevelClicking on then knob, after selecting this voice, goes into the menu that allows to sets theIF1 level. Rotate the knob to select the desired value and click on it. The actual level isrepresented by the empty arrow, the full arrow represent the value of the factory settingof this level. This 'factory default marker' can help you to set-up the exciter to a goodvalue, without ant instrumentation.
28Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.IF2 LevelClicking on then knob, after selecting this voice, goes into the menu that allows to sets theIF2 level. Rotate the knob to select the desired value and click on it. The actual level isrepresented by the empty arrow, the full arrow represent the value of the factory settingof this level. This 'factory default marker' can help you to set-up the exciter to a good value, without antinstrumentation.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.AudioLvlClicking on then knob, after selecting this voice, goes into the menu that allows to sets theinput audio signals level. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.If the mode is set for a dual sound audio modulation you can select to adjust the audio level to different values,so the set audio level menu become two different menus for audio1 and audio2 level setting as showed below:
29- Multistandard Video SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.White ClipShows whether there is (Prst), there isn't (Abst) or there was (Trig) the clipper intervention on white. InAbsent and Triggered case, the label blinks.Sync ClipShows whether there is (Prst), there isn't (Abst) or there was (Trig) the clipper intervention on sync. In Absentand Triggered case, the label blinks.Reset TrigClicking on the knob, after selecting this voice, delete the triggered indication from the clippers.ClipperClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe clipper intervention. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.PrecorrClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe group delay pre-corrector. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
30Sync RestoreClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe sync restore intervention. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SourceClicking on then knob, after selecting this voice, goes into the menu that allows to choosewhether to sample the input signal from the front or rear panel. Rotate the knob to selectthe desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.VideoShows the PLL lock or unlock of the video. In case of unlock, the label blinks.Video LevelClicking on then knob, after selecting this voice, goes into the menu that allows to sets thevideo level. Rotate the knob to select the desired value and click on it.The actual level is represented by the empty arrow, the full arrow represent the value ofthe factory setting of this level. This 'factory default marker' can help you to set-up the exciter to a good value,without ant instrumentation.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
31- Multistandard IF Precorrector SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.PrecClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe non-linearity pre-corrector. Rotate the knob to select the desired value and click onit.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
32- Multistandard Local Oscillator Section with Line OffsetEXITClicking on the knob, after selecting this voice, goes back to the default menu.ChannelClicking on then knob, after selecting this voice, goes into the menu that allows to selectthe transmission channel for the selected standard. Rotate the knob to select the desiredvalue and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Line offsetClicking on then knob, after selecting this voice, goes into the menu that allows to set theline offset in either positive (P) or negative(M) steps from 15M to 15P. Rotate the knobto select the desired value and click on it.Offset[Hz] = LineOffset[Step]*(LineFrequency[Hz]/12)Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.VCOShows the oscillator PLL lock or unlock. In case of unlock, the label blinks.
33OutputClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe oscillator output. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.RefClicking on then knob, after selecting this voice, goes into the menu that allows to selectwhether the reference is internal or external . Rotate the knob to select the desired valueand click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.L.O. TuneClicking on then knob, after selecting this voice, goes into the menu that allows to fineadjust the frequency of Local Oscillator, usefull only in case of absence of an externalreference. Rotate the knob to select the desired value and click on it. The actual level isrepresented by the empty arrow, the full arrow represent the value of the factory settingof this level. This 'factory default marker' can help you to set-up the exciter to a good value, without antinstrumentation.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
34- Multistandard Local Oscillator Section with Field Offset (Option)EXITClicking on the knob, after selecting this voice, goes back to the default menu.ChannelClicking on then knob, after selecting this voice, goes into the menu that allows to selectthe transmission channel for the selected standard. Rotate the knob to select the desiredvalue and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Line offsetClicking on then knob, after selecting this voice, goes into the menu that allows to set theline offset in either positive (P) or negative(M) steps from 15M to 15P. Rotate the knobto select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Field offsetClicking on then knob, after selecting this voice, goes into the menu that allows to set thefiled offset in Hertz from -700Hz to +700Hz. This is added to the line offset. Rotate theknob to select the desired value and click on it.TotalOffset[Hz] = FieldOffset[Hz]+LineOffset[Step]*(LineFrequency[Hz]/12)
35Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.DRO, VCO, STDShows the oscillator PLLs lock or unlock. In case of unlock, the label blinks.OutputClicking on then knob, after selecting this voice, goes into the menu that allows to togglethe oscillator output. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.RefClicking on then knob, after selecting this voice, goes into the menu that allows to selectwhether the reference is internal or external . Rotate the knob to select the desired valueand click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
36- Multistandard Channel Filter SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.PwrCtrlModeClicking on then knob, after selecting this voice, goes into the menu that allows to switchbetween the manual and automatic (AGC) power control mode. Rotate the knob toselect the desired value and click on it. The Auto or Manual selection will be alwaysdisplayed on the top bar.ATTENTION: for safety operation is better to set 0% to the power level that in not selected.For example is AUTO power control mode is selected, is better to set 0% to the Power Level in manualmode. In this way, after a change, the power will start from 0W.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Auto Pwr levelClicking on then knob, after selecting this voice, goes into the menu that allows to selectthe operating level of the power in case of automatic power control mode selected.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Manual Pwr levelClicking on then knob, after selecting this voice, goes into the menu that allows to selectthe operating level of the power in case of manual power control mode selected. Rotatethe knob to select the desired value and click on it.
37Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SqlchTimeClicking on then knob, after selecting this voice, goes into the menu that allows tochoose the squelch time. This is the time without input signal after which the VEGA mutethe power amplifier. This time can be choose a steps of 5 seconds and can also bedisabled, in this can the VEGA will never mute the power amplifier with or without theinput signal.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from Accept: NO, so to exit quickly form this menu simply click 2 times on theknob.MuteClicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween mute or not the power amplifier. Remember that Mute On means No Power.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from Accept: NO, so to exit quickly form this menu simply click 2 times on theknob.ExtAgcClicking on then knob, after selecting this voice, goes into the menu that allows to togglebetween enable or disable external agc. Before enabling it please read the external agcimplementation details.Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from Accept: NO, so to exit quickly form this menu simply click 2 times on theknob.
38ExtAgcStatShows the External AGC working status. It can be:·Disabled: AGC disabled by local or remote menu setting.·Idle: AGC temporary stopped (for example caused by -3dB power reduction without sync).·Low Set: AGC stopped because external power reading too low when VEGA power has been choosed.·Alarm: AGC stopped because Alarm signal set by Amplifier section.·Lock: AGC has reached the desired power.·Max/Min: AGC stopped because the correction is too hi.·Pull Up/Down: AGC is moving Up or Down the power.
39- Controller Module SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.Hist ViewClicking on then knob, after selecting this voice, goes into the menu that allows to showall the events stored into the non volatile memory of the VEGA. In the title bar is showedthe current event number and the total events actually stored into the log. To move insidethe log simply rotate the knob. Click the knob to exit from the history view.Hist ClearClicking on then knob, after selecting this voice, goes into the menu that allows to clearall the events stored in the history log.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.ControlClicking on then knob, after selecting this voice, goes into the menu that allows totogglethe local or remote control mode. Rotate the knob to select the desired value and clickon it.When in remote mode either the telemeasuring connector or the serial port can be used to control the exciter.Telemeasuring connector and serial port can be always used to monitor the exciter.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.ContrastClicking on then knob, after selecting this voice, goes into the menu that allows to adjustthe contrast settings of the display. Rotate the knob to select the desired value and clickon it.
40Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.BrightnessClicking on then knob, after selecting this voice, goes into the menu that allows to adjustthe brightness settings of the display. Rotate the knob to select the desired value andclick on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SerialClicking on then knob, after selecting this voice, goes into the menu that allows to togglebetween the possibility for serial port control: RS232 on the front panel and RS485 onthe rear panel. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.Factory DefClicking on then knob, after selecting this voice, goes into the menu that allows to reste allof the parameters of the VEGA to values set during the factory tests.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on the knob.DateClicking on then knob, after selecting this voice, goes into the menu that allows to set thedate of the internal clock of the display board.Rotate the knob to select the desired value and click on it, the selection will go to the nextfiled.The date format is day/month/year.
41 Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.TimeClicking on then knob, after selecting this voice, goes into the menu that allows to set thetime of the internal clock of the display board. Rotate the knob to select the desired valueand click on it, the selection will go to the next filed.The time format is hour/minute/second.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.StdClicking on then knob, after selecting this voice, goes into the menu that allows to set thestandard used. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.SignalClicking on then knob, after selecting this voice, goes into the menu that allows to selectthe signal type handled by the VEGA. Rotate the knob to select the desired value andclick on it.If 'Digital' signal type is selected the sync detection is disabled. In the same way is disabled the 3dB powerreduction feature in case of AGC power control and Sync lost.In case of Digital signal type selection the sync icon in the top bar will be replaced by a 'DIG' icon.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
42TLMoutClicking on then knob, after selecting this voice, goes into the menu that allows to togglesbetween Squelch or Alarm meaning of the output free contact of the Telemeasureconnector. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.ConfigClicking on then knob, after selecting this voice, goes into the menu that allows to go inthe Configuration menu of VEGA to change the VEGA boards topology. This possibilityis enabled only in Factory Setting mode. Answer to the confirming question, selectingbetween accept or not. The answer starts always from Accept: NO, so to exit quicklyform this menu simply click 2 times on the knob.ReleasesClicking on then knob, after selecting this voice, goes into the menu that allows to viewall the release history of all the microcontrollers around the VEGA boards. The displayboard is showed in the first line and then the audio, video, local oscillator and externalreference.
43- RF Amplifier Module SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.LockOutShows whether the LockOut state is present or absent. In case of presence of LockOut, the label blinks.Below is detailed the functioning of LockOut.While an alarm is present the exciter switch off the output power. When the alarm disappear, the power isswitched on again. After 5 times the exciter switch off the output power, the exciter goes in LockOut state: thepower remains off till the user reset the LockOut. If the fails are far more that 1 hour than the LockOut counteris automatically cleaned.ResetLockOutClicking on then knob, after selecting this voice, goes into the menu that allows to clearLockOut counter.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on the knob.VoltageShows the measure of the power supply voltage of the final power stage. In case of abnormal value, the labelblinks.CurrentShows the measure of the power supply current of the final power stage. In case of abnormal value, the labelblinks.Temp.Shows the measure of the working temperature of the final power stage. In case of abnormal value, the labelblinks.FanShows the operating mode of the fan, which may run at low or high speed, be still or be programmed to work
44automatically depending on the temperature of the final stage. The fan symbol on the right shows the fanspeed: 0, 1 or 2 means respectively stopped, low and high speed.Clicking on then knob, after selecting this voice, goes into the menu that allows to set thestandard used. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
45- BUS Structure SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.PowerClicking on then knob, after selecting this voice, goes into the menu that allows to turnson or off the power supply of the whole BUS. Rotate the knob to select the desired valueand click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.PollingClicking on then knob, after selecting this voice, goes into the menu that allows to turnson or off the BUS polling feature. Rotate the knob to select the desired value and clickon it.If 'BUS polling' enabled the display board will poll continuously all the board to obtainthe data values. If 'BUS polling' disabled the boards will inform by using an interrupt linethat a value has changed on them.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.+VdigitalShows the measure of the +5V power supply voltage of the bus. In case of abnormal value, the label blinks.+/-VanalogShows the measure of the +/-15V power supply voltage of the bus. In case of abnormal value, the labelblinks.
46- External Reference SectionEXITClicking on the knob, after selecting this voice, goes back to the default menu.IF linkClicking on then knob, after selecting this voice, goes into the menu that allows to choosewhether the IF connection is internal or located on the rear panel. Rotate the knob toselect the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.ExtReferenceShows whether the external reference is present.ExtRef DirClicking on then knob, after selecting this voice, goes into the menu that allows to set thedirection of the reference. Rotate the knob to select the desired value and click on it.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.ExtRef TuneClicking on then knob, after selecting this voice, goes into the menu that allows to fineadjust the frequency of the external reference. Rotate the knob to select the desired valueand click on it. The actual level is represented by the empty arrow, the full arrow representthe value of the factory setting of this level. This 'factory default marker' can help you to set-up the exciter to
47a good value, without ant instrumentation.Answer to the confirming question, selecting between accept or not. The answer startsalways from "Accept: NO", so to exit quickly form this menu simply click 2 times on theknob.
482.3 ALARMS AND AUTOMATIONIn case of alarm the red LED lights up and the icon of a bell appears in the upper bar of the display. If the alarmdisappears, the red LED is turned off and the bell starts blinking, in order to show that an anomaly occurred.To know the details of the anomaly and when it occurred, the history menu can be used. Once this menu isaccessed, the blinking bell icon disappears.In case of alarms of a board on the bus, such as the audio or the video modulator, the green status led on theboard, will start blinking. When the board is working correctly the led is lit continuously.In case of alarm of a board on the Bus, a bell icon appears under the board image in the front or rear viewmenu. Inside the board menu the alarm value will blink.TRICK: in case of red alarm LED lit, to quickly find the alarm move between the front and rear view andlook for the bell symbol under a board. If present go inside the board menu looking for the blinking value.While an alarm is present the exciter switch off the output power. When the alarm disappear, the power isswitched on again. After 5 times the exciter switch off the output power, the exciter goes in LockOut state: thepower remains off till the user reset the LockOut. If the fails are far more that 1 hour than the LockOut counteris automatically cleaned.Please find below the list of the automatic interventions of the exciter in case of anomalies, and the relevantrecord in the history.l Amplifier VoltageNo intervention. The history records and intervention if the value is too high or too low by the 10% of itsnominal value (factory setting).l Amplifier CurrentNo intervention. The history records an event if the value is too high by the 20% of its nominal value (factorysetting), only when the amplifier is on.l Amplifier TemperatureThe temperature is connected to the work of the fan, if it is set to automatic mode, in this way: there are 3thresholds, TH1 < TH2 < TH3, all with histeresys.Under the lowest threshold (TH1) the fan is offBetween TH1 and TH2 the fan is on and rotates slowlyBetween TH2 and TH3 the fan is on and rotates fastBeyond the higher threshold (TH3) the amplifier is switched off and an event is recorded in the history.
49If the temperature drops again below TH3, the amplifier is switched back on.A fast sequence of on/off switching causes a LockOut of the apparatus.l BUS Voltages (+5V, +15V, -15V)No intervention. The history records and intervention if the value is too high or too low by the 10% of itsnominal value.l Forward & Reflected PowerIf the value of the forward power exceeds the threshold value (factory setting) the ampifier is switched off andthe event is recorded in the alarm history.l No communication with the boards on the BUSNo intervention. The history records the event only if Polling is enabled. If Polling is disabled, the Nocommunication is not detected.If a board is not communicating a ! symbol appears under the board image in the front or rear menu.l Non-corresponding standardsThere is no intervention in case one or more boards on the BUS are set to work on different standards. Thehistory records the event.l IF Audio unlockThe audio board turns off its IF in case it becomes unlocked. The history records the event.l Audio OverloadThe menu of the audio board indicated the event with a blinking 'Triggered' message. The history does notrecord any event.l IF Video unlockThe video board turns off its IF in case it becomes unlocked. The history records the event.Besides, the final amplifier is switched off.l Video ClipperThe menu of the video board indicated the event with a blinking 'Triggered' message. The history does notrecord any event.l L.O. unlockThe local oscillator board turns its output off if any of its PLL unlocks. The history records the event.
50Besides, the final amplifier is switched off.l No SyncIn case the synchronism is missing the sync icon in the top bar blinks.In this case the value of the output power is decreased by 3dB onlyif analog signal type is selected and AGC control is selected. In case of 3dB otput power decrease, the outputpower value in the bottom bar will be written between round brackets.l SquelchAfter a selectable time the video input signal is missing the VEGA mute the output power. When the videosignal come back the output power is switched on. During the squelch period the output power (0W) will bewritten between square brackets.2.4 EXTERNAL AGC: IMPLEMENTATION AND DETAILSScopeThis paper explain the External AGC implementation inside VEGA TV Transmitter.The use of External AGC help the VEGA Transmitter to maintain stable the Output Power. With a menusetting you can choose between stabilizing the output power of VEGA transmitter (External AGC disabled)or stabilizing the output power of a bigger transmitter with the VEGA acting as driver/modulator (ExternalAGC enabled). In this case a cabling is necessary between VEGA and Power Section.CablingIn case of AGC stabilizing output power of a transmitter where VEGA acts as Driver, the VEGA needs to beconnected to the Amplifier section with a cable connected to VEGA Telemeasuring port. The correspondingpin on the Amplifier side depends on the specific amplifier used.VEGADB9 TELEMEASURE AMPLIFIER5GND4¬ FWD Power (0 - 5V)8¬ Alarm (0V= Alarm - 5V= Ok)
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52AGC implementationThe AGC goal is to maintain stable the output power. Output power in fact can change due to the increase ofamplifier temperature. Note that when you change the operating frequency the output power change due tothe different gain at different frequency, but this change is not stabilized by this AGC algorithm. The power tostabilize is read from external telemerasuring connector.To keep the power stable the AGC change the power gain of VEGA.The AGC algorithm is based on the acquisition of the optimal output power level (stored when you confirmVEGA output power, exiting from the power level menu) and the use of 4 thresholds as below:______action threshold ____________goal threshold __________________optimal power value ____________goal threshold______action thresholdThe distance of thresholds from optimal value is of ±20 mV and ±30 mV measured as monitor voltage.The AGC change output VEGA power in order to have power inside goal threshold. When this goal isachieved the AGC stops until the power goes outside action threshold.The AGC work is stopped immediately (output power remains blocked to that reached in the moment of theAGC stop) when one of this condition occurs:·One of VEGA alarms is triggered.·AGC is chosen as external and Amplifier section triggers an alarm.·VEGA output power too low·AGC has change the VEGA output power too much.In order to simplify the understanding of AGC state, this is written in the AGC menu. The possible states ofAGC are:·Disabled: AGC disabled by local or remote menu setting.·Idle: AGC temporary stopped (for example caused by -3dB power reduction without sync).·Low Set: AGC stopped because external power reading too low when VEGA power has been choosed.·Alarm: AGC stopped because Alarm signal set by Amplifier section.·Lock: AGC has reached the desired power.·Max/Min: AGC stopped because the correction is too hi.·Pull Up/Down: AGC is moving Up or Down the power.WARNING: When changing from AUTO to MANUAL power control mode, the External AGC will be disabled.
532.5 POWER HANDLINGThe VEGA Power handling is characterisedby 3 state:·BUS OFF: the boards on the Bus are offand the power amplifier is switched off·MUTE: the board on the Bus are switchedon and working. Only the power amplifier isswitched off.·POWER ON: the boards and the poweramplifier are switched on and working. Thisis the normal working functioning.Moving between the 3 states is alwayspossible by using the display menu or byremote connection. Moreover the state ofPOWER ON is characterised by a sequenceof steps. The sequence is detailed in thePower Handling diagram.
542.6 VEGA FACTORY SETTINGThe VEGA display board stores some settings and fine tunings inside its not erasable memory. The storingoccurs while the VEGA is tested in factory before the sell. To enter in Factory Setting mode a dip-switch isused.DIP2 On (VEGA display board): Factory setting.Note that DIP2 is set to ON only during the factory setup of the exciter. This allow to store in the memory allof the settings made as factory defaults. Once the test is completed, and while the modulator is used normally,the DIP2 must be kept OFF.One of the factory setting stored during this phase is the set point of all the digital trimmer in the menu list. Ifyou take a look at a digital trimmer it has two wiper: one is filled and the other is empty. The filled can bemoved ONLY during the phase of Factory Setting. In this way, during the normal operation of VEGA, if theuser try to move a set point and forget the original value can easily go back to the factory set point, without anyinstrumentation.All other settings available in the phase of Factory Setting are present in some hidden menu described below.All the hidden menu are located at the right of the Front menu.Fwd MaxClicking on then knob, after selecting this voice, goes into the menu that allows tochange the trigger point of the Forward Max alarm. Rotate the knob to select the desiredvalue and click on it.Reflected MaxClicking on then knob, after selecting this voice, goes into the menu that allows tochange the trigger point of the Reflected Max alarm. Rotate the knob to select thedesired value and click on it.
55Nominal VoltageClicking on then knob, after selecting this voice, goes into the menu that allows tochange the value of the nominal voltage of the power supply of the power amplifier.Rotate the knob to select the desired value and click on it.Nominal CurrentClicking on then knob, after selecting this voice, goes into the menu that allows tochange the value of the nominal current of the power supply of the power amplifier.Rotate the knob to select the desired value and click on it.SubCarrier1 DeviationClicking on then knob, after selecting this voice, goes into the menu that allows to changethe value of Audio Sub Carrier 1 deviation. Rotate the knob to select the desired valueand click on it.SubCarrier2 DeviationClicking on then knob, after selecting this voice, goes into the menu that allows tochange the value of Audio Sub Carrier 2 deviation. Rotate the knob to select the desiredvalue and click on it.Luminance LevelClicking on then knob, after selecting this voice, goes into the menu that allows tochange the level of luminance. Rotate the knob to select the desired value and click onit.Sync LevelClicking on then knob, after selecting this voice, goes into the menu that allows to changethe level of sync. Rotate the knob to select the desired value and click on it.- Setup ConfigurationDuring Setup Configuration in the VEGA is manually entered which board is present or not on the BUS. Thismodality is entered the first time the display board of the VEGA is programmed and by using the Configmenu in the General menu sequence. This menu is available only in Factory Setting mode.Entered in Setup Configuration the user have to insert the working modality of VEGA: Transmitter, Repeateror Amplifier.
56Then the user have to choose which kind of boards are connected on the bus, moving between front and readview. The modifiable boards are that with  symbol under them.Once entered the configuration the user has to go in the rightmost windows and choose the Confirm to changethe actual configuration.

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