Masterclock CLKTCD Series Manuel d'utilisateur télécharger pdf (Page 8)

CLKTCDSeriesUserManual–Rev.2.0.1Page8

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Introduction

TheCLKTCDisaprecisionanalogclockcontainingasteppermotordriveandadvanced

microprocessorcontrolledelectronics.



IRIG‐B

DefinedbytheRangeCommandersCouncil,U.S.ArmyWhiteSandsMissileRange.IRIG(Inter‐

rangeInstrumentationGroup)isusedbymilitary,government,powerindustryandmanyother

commercialandindustrialapplications.TheCLKTCDdecodesIRIG‐Binbotha1kHzmodulated

(IRIG‐B1)andun‐modulated/pulsewidthcoded/DClevelshifted(IRIG‐B0)format.Allformatsof

IRIG‐BtimecodedecodedbytheCLKTCDusethetimeofyearinformationBCD(BinaryCoded

Decimal).AllformatsofIRIG‐BtimecodedecodedbytheCLK

TCDalsousetheextended

year/dateandtimezoneinformationinthecontrolfunctionsasdefinedbytheIEEE1344

specification.SBS(StraightBinarySeconds)informationisnotdecoded.Manchester

format/encodingisnotsupported.



TheCLKTCDcanbeconfiguredforworld‐widetimezoneoffsetandautomaticDST(DaylightSaving

Time)adjust

mentandallowsforreliable,accurateandmaintenancefreeoperation.Useofthe

automaticDSTfeaturerequiresthattheclockbeenabledtoacceptthetimecodedateencoding,

usingtheUSBportandCLKTCD‐Set(ClockTimeCodeDisplay)USBConfigurationUtility(i.e.Windows

softwareapplication).Thetimecodereferencemustprovidedateencodinginthecontrolbits/fields

totheMasterclock/LeitchdateencodingstandardforSMPTEortheIEEE‐1344yearencodingfor

IRIG‐B.



SMPTE

SocietyofMotionPictureandTelevisionEngineersformatisavailableinframeratesof24,25,and30

framessecond.TheCLKTCDtimecodeclocksupportsallthreeformats.



AllformatsofSMPTEtime

codedecodedbytheCLKTCDusethefulldateinformationintheuserbitsasdefinedbyLeitch,Inc.

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TheCLKTCDdoesnotsupportdecodingofSMPTEdrop‐frame,reverserunning,VITC,NTSC,

colorframe,blackburstorothervideotimecodeformatsandsynchronizationoptions.



Pleaserefertothe“Specifications”sectionofthisdocumentforadditionaldetailson

eachmodel.Foravailableoptions,visitMasterclock’swebsite:www.masterclock.com



Features

• RTC(RealTimeClock)backupretainstimeduringlossofpowerorreference.

• Self‐correctinghandsoncepowerand/orTimeCodereferenceisestablished.

• Timezoneoffsets(toonesecondresolution)supportsanybiasingrequirements.

• DSTconfiguration.

• TCXO(TemperatureCompensatedCrystalOscillator)for+/‐1minyearaccuracywithno

referencein(freewheeling).

• Allconfigurationsettingsretainedinnon‐volatileflashmemory.

• SecondHandwithsweeporstepoption.

• Self‐correctinghandsafterlossofpowerand/ortimecodereferenceandDSTchanges.

• StatusLED(LightEmittingDiode)onclockface,locatedatthe6o’clockposition.

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Masterclock CLKTCD Series Manuel d'utilisateur Page 8

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