1.GENERAL
1.1Description
1.2Features
The620Rfamilyoscilloscopearedual-channeloscilloscopewithmaximumsensitivityoflmV/div.Thetimebaseprovidesa
maximumsweeptimeof0.2uS/div.Whenmagnifiedby10,thesweepspeedis20ns/div.Theverticaldeflectionsystemhas
twoinputchannels.Eachchannelhas12basicdeflectionfactorsfrom5mVt020Vperdivision,itcanexpandedto1mV/div
bypulloutx5MAGbutton.Eachoftheseoscilloscopeemploysa6-inchrectangulartypecathode-raytubewithinternal
graticule.620R/640Rhascursorreadoutfunctionwhichcandisplayvoltage,time,frequencyetc.informationonscreen.
Theseoscilloscopesaresturdy,easytooperateandexhibitshighoperationalreliability.
L)HighintensityCRTwithhighaccelerationvoltage:
TheCRTisahighbeamtransmission,highintensitypewithahighaccelerationvoltageof2KVforand
12KVfor.Itdisplaysclearreadabletracesevenathighsweepspeeds.
2)Atriggerlevellockfunctionwhichmakesthetriggeringadjustmentunnecessary.
3)Alternatetriggering:
Evenanobservationoftwowaveformsofdifferentfrequencies,thewaveformoftheeachchannelisstablytriggered.
4)TVsynctriggering:
TheoscilloscopehasasyncseparatorcircuitfortriggeringofTV-VandTV-Hsignals.
5)CHlOutput:
Terminated50ohmoutputofchannel1signalavailableonrearpanelfordrivingfrequencycounterorotherinstruments.
6)Z-AxisInput:
Intensitymodulationcapabilitypermitstimeorfrequencymarkerstobeadded.Traceblankwithpositivesignal,TTL
compatible.
7)X-Yoperation:
SettheswitchtoX-Y.ThentheinstrumentworksasanX-Yoscilloscope.CHlcanbeappliedashorizontaldeflection(X-axis)
whileCH2provideverticaldeflection(Y-axis).
ty BF5620NF/620R
640B/650B/640BF/650BF/640R/650R
620B/620
1
2
2.TECHNICALSPECIFICATIONS
20MHzOSCILLOSCOPE40MHz/50MHzOSCILLOSCOPE
620B/5620NF/620BF/620R640B/650B/640BF/650BF/640R/650R
5mV~20V/DIV,12stepsin1-2-5sequence(5620NF:5mV-5V/DIV,10stepsin1-2-5sequence)
≤≤3%(x5MAG:5%)(5620NF:Devoid)±±
(
10°°
)
C-35C
Continuouslyvariabletol/2.5orlessthanpanel-indicatedvalue.
DC~20MHz(x5MAG:DC~7MHz)DC~4OMHz(x5MAG:DC~15MHz)
ACcoupling:Lowlimitfrequency10Hz.(Withreferenceto100KHz,8DIV.Frequencyresponsewith-3dB)
Approx.17.5nS(x5MAG:Approx.50nS)Approx.8.75nS/8.0nS(x5MAG:Approx.50nS)
Approx.lMohm//Approx.25pF
≤± o0.lDIVofamplitudechangewhenwavefrmof2DIVatgraticulecenterismovedvertically.
CHI:CHlsinglechannel.
CH2:CH2singlechannel.
DUAL:CHIandCH2aredisplayed.ALTorCHOPselectableatanysweeprate.
ADD:CH1+CH2algebraicaddition.
Approx.250KHz
AC,GND,DC
400V(DC+ACpeak),AC:frequencylkHzorlower.
Whensetprobeswitchatl:1,themaximumeffectivereadoutis160Vpp(56Vrmsatsinewave),
orsetprobeswitchat10:1,themaximumeffectivereadoutis400Vpp(140Vrmsatsinewave).
50:1orbetterat50KHzsinusoidalwave.(WhensensitivitiesofandCH2aresetequally)CH1
>1000:lat50KHz
>30:lat15MHz>30:1at35MHZ/45MHz
Atleast20mV/DIVintoa50ohmtermination.Bandwidthis50Hztoatleast5MHz.
Balancedpointvariation:1DIV(Referenceatcentergraticule.)≤
Sensitivity
Sensitivityaccuracy
VernierVerticalsensitivity
Frequencybandwidth
Risetime
Inputimpedance
Linearity
Werticalmodes
Choppingrepetitionfrequency
Inputcoupling
Maximuminputvoltage
Commonmoderejectionratio
Isolationbetweenchannels
(At5mV/DIVrange)
CH1signaloutput
CH2INVBAL.
MODEL
SPECIFICATIONS
Tableone