Masterclock TCR1000 Manual do Utilizador descarregar pdf (Página 14)

TCR1000UserManual–Rev.2.0.3 Page14

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Configuration

Hardware

Input“TimeCode”Connection

TheTimeCodeinputisbalanced;assuchtheinputpolarityisnotcriticaltooperationoftheTCRcard.

Forsystemsdistributingsingleendedorunbalancedtimecodesignaltomultipledevices,itis

suggestedthatthesignaldistributionmethodbeconsistent.

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AninsulatedBNCfemaleconnectorisprovidedasastandardconnectorfor2‐wiretimecodeinput.

TheTCR1000cardhasasingleBNCconnector.Alongwithcoaxialcabletodistributetimecodes

reservethecenterconductoroftheBNCastheTimeCodesignalandtheouterBNCconductorasthe

Time

CodeReference/SignalGND.

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PartialMasterclock’sTCR1000timecodeinputcircuit

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Anoptional3‐pinlockingheaderconnectorcanbeorderedattimeofpurchaseinsteadof

theBNCconnector.

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InputImpedance

TheinputimpedancefortheTCR1000circuitisconsideredtoberelativelyhighatapproximately

100kΩ.Thishighinputimpedanceallowsforconnectingmultipletimecodedeviceson

thesame

signalpathwithoutloadingand/ordistortingtheinputtimecodesignal.

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InputLevel

TheTCR1000firmwarewillautomaticallydeterminetheappropriategaincontrolsettingforyour

incomingtimecodedBlevelwithinrange(notoutsidetherangeof‐15and+20dB).

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TheTCR1000requiresupto30seconds

tocompleteautomaticgaincontrolwhendecodingSMPTE

and(intheworstcase)uptothreeminuteswhendecodingIRIG‐B0/B1.Whenpropergaincontrolhas

beenachievedtheincomingtimecodeshouldbereadanddisplayedonthescreenwithoutany

hesitationsorjumps,andtheLEDonthecard

willlightsteady‐on.

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TimeCodeInputSelect

TheTCR1000cardwillautomaticallydetectwhichformatoftimecodeisbeingprovidedtothecard

uponinitialpowerupwithavalidtimecode.Nouserhardwareadjustmentsarenecessary.

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Masterclock TCR1000 Manual do Utilizador Página 14