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1
1.GENERAL
1.1Description
The20MHz/340oscilloscopearedual-channeloscilloscopewithmaximumsensitivity
of5mV/DIV.Thetimebase
25MHz/0MHz/MHz/50MHzfamily
providesamaximumsweeptimeof0.2uS/DIV.Whenmagnifiedby10,thesweepspeedis
20nS/DIV.Eachoftheseoscilloscopeemploysa6-inchrectangulartypecathode-raytubewithredinternalgraticule.
Theseoscilloscopesaresturdy,easytooperateandexhibitshighoperationalreliability.
1.2Features
1)HighintensityCRTwithhighaccelerationvoltage:
TheCRTisahighbeamtransmission,highintensitytypewithahighaccelerationvoltageof2KVfor20MHz/25MHz
/30MHzand12KVfor40MHz/50MHz.Itdisplaysclearreadabletracesevenathighsweepspeeds.
2)Atriggerlevellockfunctionwhichmakesthetriggeringadjustmentunnecessary.
3)Alternatetriggering:
Evenanobservationoftwowaveformsofdifferentfrequencies,thewaveformoftheeachchannelisstablytriggered.
4)TVsynctriggering:
TheoscilloscopehasasyncseparatorcircuitfortriggeringofTV-VandTV-Hsignals.
5)X-Yoperation:
SettheswitchtoX-Y.ThentheinstrumentworksasanX-Yoscilloscope.CHlcanbeappliedashorizontaldeflection
(X-axis)whileCH2provideverticaldeflection(Y-axis).
2.TECHNICALSPECIFICATIONS
5mV~5V/DIV,10stepsin1-2-5sequence
Tol/2.5orlessofpanel-indicatedvalue.
DC~30MHzDC~40MHzDC~50MHzDC~20MHz
ACcoupling:Lowlimitfrequency10Hz.(Withreferenceto100KHz,8DIV.Frequencyresponsewith-3dB.)
Approx.17.5nSApprox.11.7nSApprox.8.75nSApprox.7nS
Approx.lMohm//Approx.25pF
≤± o0.lDIVofamplitudechangewhenwavefrmof2DIVatgraticulecenterismovedvertically.
CH1:CHlsinglechannel.
CH2:CH2singlechannel.
DUAL:CH1andCH2aredisplayed.ALTorCHOPselectableatanysweeprate.
ADD:CH1+CH2algebraicaddition.
Approx.250KHz
AC,GND,DC
400V(DC+ACpeak),AC:frequencylKHzorlower.
Whensetprobeswitchatl:1,themaximumeffectivereadoutis40Vpp(14Vrmsatsinewave),
orsetprobeswitchat10:1,themaximumeffectivereadoutis400Vpp(140Vrmsatsinewave).
50:1orbetterat50KHzsinusoidalwave.(WhensensitivitiesofCH1andCH2.aresetequally)
>1000:lat50KHz
>30:lat15MHz>30:1at35MHz>30:1at45MHz
Balancedpointvariation:1DIV(Referenceatcentergraticule.)≤
Sensitivity
VernierVerticalsensitivity
Frequencybandwidth
Risetime
Inputimpedance
Linearity
Verticalmodes
Choppingrepetitionfrequency
Inputcoupling
Maximuminputvoltage
Commonmoderejectionratio
Isolationbetweenchannels
(At5mV/DIVrange)
CH2INVBAL.
MODEL
SPECIFICATIONS
DCbalanceshift Adjustableonpanel
2
20MHzOSCILLOSCOPE 30MHzOSCILLOSCOPE40MHzOSCILLOSCOPE50MHzOSCILLOSCOPE
>30:1at25MHz