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VARIABLE.......................(9)(21)
Fineadjustmentofsensitivity,withafactorof1/2.5oftheindicatedvalue.WhenintheCALposition,sensitivityis
calibratedtoindicatedvalue.
CH1&CH2DCBAL.(13)(17)
Theseareusedfortheattenuatorbalanceadjustment.Seepage26DCBALadjustmentsforthedetails.
POSITION.................(11)(19)
Verticalpositioningcontroloftraceorspot.
VERTMODE.....................(14)
SelectoperationmodesofCHlandCH2amplifiers.
CH1:Theoscilloscopeoperatesasasingle-channelinstrumentwithCH1alone
CH2:Theoscilloscopeoperatesasasingle-channelinstrumentwithCH2alone.
DUAL:Theoscilloscopeoperatesasadual-channelinstrumentbothCH1andCH2.
ADD:Theoscilloscopedisplaysthealgebraicsum(CHl+CH2)ordifference(CH1-CH2)ofthetwosignals.
ThepushedinstateofCH2INV(16)buttonisforthedifference(CHl-CH2).
ALT/CHOP...........................(12)
Whenthisswitchisreleasedinthedual-tracemode,thechannellandchannel2inputsarealternatelydisplayed
(normallyusedatfastersweepspeeds).
Whenthisswitchisengagedinthedual-tracemode,thechannel1andchannel2inputsarechoppedanddisplayed
simultaneously(normallyusedatslowersweepspeeds).
CH2INV................................(16)
InvertstheCH2inputsignalwhentheCH2INVswitchmodeispushedinThechannel2inputsignalinADDmodeand
thechannel2triggersignalpickoffarealsoinverted.
11
≥
Triggering:
EXTTRIGINinputterminal...............(25)
SOURCE....................(24)
TRIG.ALT.............(28)
Inputterminalisusedforexternaltriggeringsignal.Tousethisterminal,setSOURCEswitch(24)totheEXTposition.
Selecttheinternaltriggeringsourcesignal,andtheEXTTRIGINinputsignal.
CHl:WhentheVERTMODEswitch(14)issetintheDUALorADDstate,selectCHlfortheinternaltriggeringsource
signal.
CH2:WhentheVERTMODEswitch(14)issetintheDUALorADDstate,selectCH2fortheinternaltriggeringsource
Signal.
LINE:ToselecttheACpowerlinefrequencysignalasthetriggeringsignal.
EXT:TheexternalsignalappliedthroughEXTTRIGINinputterminal(25)isusedfortheexternaltriggeringsourcesignal.
:
WhentheVERTMODEswitch(14)issetintheDUALorADDstate,andtheSOURCEswitch(24)isselectedatCHlor
CH2,withtheengagementoftheTRIG.ALTswitch(28),itwillalternatelyselectCH1&CH2fortheinternaltriggering
sourcesignal.
12
SLOPE...................(27)
selectthetriggeringslope.
"+":Triggeringoccurswhenthetriggeringsignalcrossesthetriggeringlevelinpositive-goingdirection.
"-":Triggeringoccurswhenthetriggeringsignalcrossesthetriggeringlevelinnegative-goingdirection.