DreamGEAR MSK 33 manual Examples for QAM constellation diagram

Page 78

Const Menu

Examples for QAM constellation diagram

The following examples show possible errors and their representation in the constellation diagram.

64 QAM signal without faults	64 QAM signal with intermodulation of narrow
	band noise

64 QAM signal with low broadband noise. Possible cause: Bad amplifier or to small of

input level on an amplifier in the transmission line.

64 QAM signal with strong broadband noise. Possible cause: cable loss is to high or amplifier has a defect.

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Contents Operating manual Page Preface Contents Checking the LNB supply voltage of a satellite receiver Selecting the colour standards PAL, Secam and Ntsc Mpeg transport stream interface TS-Parallel, Lvds optional Measuring an audio signal via the AV socket Scart Measurement of analogue signals in Sat operation 100 107 113Important Notes General safety informationExplanation of symbols Validity of this manualProper use Safety InstructionsConnections Mechanical loadbearing capacityFunctions FunctionsReturn path LP Functions overviewFunction DVB-S DVB-S/C/TDisplays, Operating Elements and Connections Front panelHeadphone connection Mains connection Mains switch DC socket Option / XLR-socketRear panel TS parallel Option 10 AUXObserving angle of the on screen display Side view MSKOperating Concept ScreenFrequently recurring softkeys Main menu General information for operationMenu selection Accu CAP % I=0.00 aOn/Off switch Place of installation of the MSKMains voltage / mains switch Safety fuseAccumulator and Battery Operation Accumulator operationDC socket option Connections Measurement Possibilities Level measurementMaximal input level Sat Operation Sat menuSetting of the LNB voltage supply Selecting the LO frequencyEntering the transponder frequency III Switch-over of Analog digit. DvbsBargraph Level range Comment Display Calling up menu LNB-CONTROLLNB supply voltage KHz control signalLNB control menu LNB current drawChecking the LNB supply voltage of a satellite receiver Calling up the DiSEqC/V SEC menuDiSEqC DiSEqC menu Display field a Submenu for entering DiSEqC commandsTX display field Display field BExample Entering and transmitting a DiSEqC command Simple DiSEqCData burst Tone burst Display fields UFOmicro DiSEqC menuGeneral information RX 0 E2 10Operating the menus Tx+rx Command1390 ModusSat Operation Sending a V-SEC command TX SEC menuEntering the hex numbers Calling up the sound subcarrier Level-dependent acoustic signalInitial ANALOG-menu MenuSecond Anlaog menu Video polaritySat subcarrier menu Audio carrier settingSetting of the de-emphasis Selecting the subcarrier recepAudio carrier tables for the satellite reception Audio carrier table for reception typeDigital Measurements SAT Digital menu27.500 SR Level measurement Digital Min./Max. levels C10 210.25MHz A65.0dBµV TV OperationTV menu Rf chanTV control menu TV-DiSEqC /VSEC menuLNB U= 0.0 V I= 0 mA Audio carrier table for TV reception Analogue menuSelecting the standard Selecting the audio carriersSelecting the colour standards PAL, Secam and Ntsc Measuring the min./max. levelMeasuring the current level Measuring audio carrier spacingTV Digital menu Selecting demodulation for DVB-C measurementMode DVB-T optional Selecting channel bandwidthsReturn Path if Menu Return path if menuAnalog menu Audio carrier table for if receptionMeasurement of the min./max. level Measurement of the audio carrier spacingMeasurement of the current level QAM64 mode Entering symbol rateIf RP Digital Menu Radio Operation Radio menuRadio Analog menu FM Measure ALL Measuring the min/max levelDecoder operation baseband Video input AV MenuDecoder operation Video outputBreaking voltage RGB operationMpeg transport stream interface TS-Parallel, Lvds optional Mpeg Decoder Menu Optional PAT 083sat KiKa Phoenix Setting Menu UnitOffset 0.0 dB Screen setup Screen MenuSystem Menu Setting the dateSetting the time Click button Calls up the SYS TEM menuCalling up saved settings Saving and calling up unit settingsSaving the unit settings Copy MenuPrinting out all measurements in TV mode Printing out all measurements in Sat modeMode Menu SpectrHolding the videotext Text MenuEnlarging the videotext Original videotext sizeScope Menu Horizontal zoom -Enlarging the video signalHorizontal zoom Reducing the video signal Video scope menuMeasurement of the amplitude of the video signal Measurement of video signals via the AV socket ScartSelecting the video line Audio Scope TimePos Saving function Position and triggering of the DiSEqC signalDiSEqC Scope Shot ContMark Spectral MenuMarker Span AnaMarker ana Marker digZoom marker Measurement of digital signals in Sat operationCross-polarisation measurement on signals in SAT operation Max offConst Menu Constellation diagram for Qpsk DVB-SMeasurement of the bit error rate BER Colour representation of I/Q value pairsMeasurement of signal noise ratio SNR Carrier offsetFrontend locked Selecting the symbol rate symbol-clock Inverting /not inverting a constellation diagramSelecting the code rate Examples for Qpsk constellation diagrams Constellation diagram for QAM DVB-C Measurement of modulation error rate MERInverting /not inverting constellation diagram ZoomExamples for QAM constellation diagram Const Menu Measurement of signal noise ration SNR Constellation diagram DVB-T optionalMeasurement of bit error rate BER Carrier modeHierarchy Code rate Guard Invers Frontend locked Channel display Impulse response representation Echo representation optional Broadband Cable Analysis Measuring System MSK Measuring principleTrack MVG10 MSK33 MVG10 Upstream measurementDownstream measurement RGB MSK33Cable system With return path capable amplifiers Auto Measure Display of the check pointInterfaces Modem / RS 232 interfaceConnection cable for modem / RS Setting hardware handshake Setting baud rateSetting local echo Modem/RS232 menuAnsi mode Code PasswordTTY mode Log-in procedureExample for logging-in in Ansi mode Requesting helpInterfaces List of the command abbreviations STU RET Loading and saving predefined settingsSTU LDUMaintenance, Storage and Customer Service Printer paper-exchanging the ribbon Ribbon exchangeCommand overview address byte Overview of DiSEqC commandsCommand overview framing byte Technical AppendixCommand overview command byte Reset Reset DiSEqC minicontrollerCommand for Kathrein matrix 9xx-series DiSEqC commands for Kathrein matricesCommand overview data byte Command for Kathrein matrix EXRVHF-CCIR UHF-CCIR Channel tablesChannel and frequency table standard B/G frequency in MHz USB/OSB ESBChannel and frequency table standard Lfrequency in MHz VHF UHFViii Channel and frequency table standard D/K frequency in MHzVII XIIChannel and frequency table standard I frequency in MHz Channel and frequency table standard M/N frequency in MHz Channel and frequency table standard M/Nfrequency in MHz Technical Data Technical dataPower supply SNR Qpsk BERMER Accessories Scope of deliveryAssignment of the Scart socket Assignment of RS232 socket TXD RXD RTS CTS DSR GND DCD DTRAssignment of socket TS Parallel optional Unit variants Downloading New MSK33 Operating Software General notes9986498/0206 ZWT Subject to alterations