Trio CS-2100A Manual de usuario

CS-2100A

100MHz

4-CHANNEL

OSCILLOSCOPE

INSTRUCTIONMANUAL

TRIO-KENWOODCORPORATION

DELAYEDSWEEPOSCILLOSCOPE

CS-2100A

100MHz4-CHANNEL

OSCILLOSCOPE

INSTRUCTIONMANUAL

TRIO

CONTENTS

FEATURES1-1

SPECIFICATIONS2-1

PRECAUTIONFORUSE2-3

CONTROLSANDINDICATORS

FRONT

PANEL3-1

SIDE

PANELANDREARPANEL3-5

BOTTOMPANEL3-6

OPERATION

[1]

NORMALSWEEPDISPLAYOPERATION4-1

12]

MAGNIFIEDSWEEPOPERATION4-2

[3]

DELAYEDSWEEPOPERATION4-2

14]

ALTERNATINGSWEEPOPERATION4-3

15]

DUALSWEEPOPERATION4-3

[6]

X-YOPERATION4-4

[7]

SINGLESWEEPOPERATION4-4

[8]

DUALANDQUADTRACEOPERATION4-4

[9]

CASCADEDOPERATION4-4

APPLICATION

ADJUSTMENTSREQUIREDBEFORESTARTING

MEASUREMENT5-1

PROBECOMPENSATION5-1

TRACEROTATIONCOMPENSATION5-1

MEASUREMENTS5-1

VOLTAGEMEASUREMENTS5-1

MEASUREMENTOFTHEVOLTAGEBETWEEN

TWOPOINTSONA WAVEFORM5-2

ELIMINATIONOFUNDESIRED

SIGNALCOMPONENTS5-2

TIME

MEASUREMENTS5-3

FREQUENCYMEASUREMENTS5-3

PULSEWIDTHMEASUREMENTS5-4

PULSERISETIMEANDFALLTIME

MEASUREMENTS5-4

TIME

DIFFERENCEMEASUREMENTS5-5

PHASEDIFFERENCEMEASUREMENTS5-6

RELATIVEMEASUREMENTS5-6

PULSEJITTERMEASUREMENTS5-8

SWEEPMULTIPLICATION5-8

DELAYEDSWEEPTIMEMEASUREMENTS5-9

PULSEWIDTHMEASUREMENTSUSING

DELAYEDSWEEP5-9

FREQUENCYMEASUREMENTSUSING

DELAYEDSWEEP5-10

PULSEREPETITIONTIME5-10

USING

DELAYEDSWEEPFORMEASUREMENT

RISETIMESANDFALLTIMES5-11

TIME

DIFFERENCEMEASUREMENTS

USING

DELAYEDSWEEP5-11

X-YOPERATION5-12

QUADTRACEOPERATION5-13

DUALSWEEPOPERATION5-13

INSTALLINGPROBEHOLDER6-1

INSTALLINGACCESSORYBAG6-1

CIRCUITDESCRIPTION7-1

BLOCKDIAGRAM7-5

MAINTENANCE8-1

REMOVALOFCASE8-1

REMOVING/INSTALLINGCRT8-1

TROUBLESHOOTING8-1

REPLACINGSWITCHING

POWERSUPPLY8-2

REPLACINGBATTERY8-2

FEATURES

•Smallandcompactwithhigh5 mV/divsensitivityand100

MHzbandwidth(1mV/divwhenX5GAINfunctionisused

and500^V/divforcascadedoperation,CH1toCH2).

•Bright150mmrectangularCRTwithaninternalgraticule

anda

6 kVacceleratingpotential.

•Verticalaxisiscapableofsingle,dualaswellas4-trace

display.

•DualsweepwithindependentA andB sweepsisprovidedin

additiontosinglesweep,X10magnification,delayedsweep

andalternatingsweepcapability.

•Fast20ns/divsweepspeed(2ns/divwithX10mag-

nification).

•A switchingtypepowersupplyprovidesstableoperation

withvaryingpowersources.

•A convenientchannel1 samplingoutputisprovided.

•GatesignaloutputsforbothA SweepandB Sweepare

providedforuseinsynchronizingperipheralequipmentto

thesesweeps.

•A convenientbeamfinderallowsyoutoquicklylocate

elusivetraces.

•LogiccontrolledswitchingwithLEDlightedpushbutton

switchesprovideseasy,reliableswitchingwithsettinghold

capabilitywhentheinstrumentisswitchedoff.

1-1

SPECIFICATIONS

CRT

Model:

150ATM31A

Displayarea:8 X 10div(1div=1 cm)

Type:

Rectangular,withinternal

graticule

Acceleratingpotential:

6kV

VERTICALAXIS(Channel1 andChannel2 identical

specifications)

Sensitivity:5 mV/divto5V/div(X1mode)

1mV/divto

V/div(X5mode)

500^ V/div(Cascadedoperation,

toCH2)

Accuracy:±3%(10~ 35°C)

±5%

(0~ 50°C)

±8%

(Cascadedoperation,

toCH2)

Attenuator:5 mV/divto5V/divin

-2-5

sequence,all10rangeswith

fineadjustment.

Inputresistance:1 M0±2%(1M0mode)

5012±2%(500mode)

Inputcapacitance:Approx.28pF

Frequencyresponse:(Includex 5 GAINmode)

DC:

DCto100MHz(-3dB)

DCto120MHz(-6dB)

DCto70MHz(-3dB),

(Cascadedoperation,CH1toCH2)

AC:

5 Hzto100MHz(-3dB)

5Hzto120MHz(-6dB)

7Hzto70MHz(-3dB),

(Cascadedoperation,CH1,toCH2)

Risetime:

3.5ns

Signaldelaytime:Approx30nsasdisplayed

onCRTscreen

Crosstalk:—40dBminimum

Operatingmodes:

CH1CH1,singletrace

CH2CH2,singletrace

DUALCH

andCH2,dualtrace

ADDCH

+ CH2(added)display

QUADCH

~ CH4.fourtrace

ALTTwoorfourwaveforms,

alternating

CHOPTwoorfourwaveforms,chopped

CHOPfrequency:Approx250kHz,switchable

Polarityreversal:CH2only

Maximuminputvoltage:500Vp-por250V(DC+ AC

peak)in1 M0mode.

5VrmsorDC±5Vin500mode.

Maximumundistorted

amplitude:8 division,minimum(DCto

100MHz)

Bandwidthlimiting:Verticalsystembandwidth

withthe20MHzBWpushbutton

switchpushedisapproximately

20MHz

VERTICALAXIS(Channel3 andChannel4 common

specifications)

Sensitivity:0.1V/div.

V/div±3%

Attenuator:1/1,1/10

Inputresistance:1 M0±2%

Inputcapacitance:Approx.28pF

Inputcouplingmode:DConly

Frequencyresponse:DCto

00MHz(—3dB)

DCto120MHz(-6dB)

Risetime:

3.5ns

Signaldelaytime:SameasCH

andCH2

Maximumallowablevoltage

DCcomponent:±0.5Vorless(AC-+-DC)

(±5V,1/10attenuated)

ACcomponent:1 Vp-p(10Vp-p,1/10 attenuated)

orless

Maximuminputvoltage:50V(DC-+-ACpeak)

HORIZONTALAXIS(CH2input)

Modes:X-Ymodeisswitchselectable

(HORIZONTALDISPLAY)

X-Ymode:CH1:Y-axis

CH2:

X-axis

Sensitivity:SameasCH2

Accuracy:SameasCH2

Inputresistance:SameasCH2

Inputcapacitance:SameasCH2

Frequencyresponse:

DC:

DCto5 MHz(-3dB)

DCto6 MHz(-6dB)

AC:

5 Hzto5 MHz(-3dB)

5Hzto6 MHz(-6dB)

X-Yphasedifference:Lessthan3°at100kHz

SWEEP

Modes(switchablewiththeHORIZONTALDISPLAYswitch):

AA Sweep

ALTB Sweepwaveformisdisplayedas

anintensifiedportionofthe

ASweepandB Sweepalternating

A-INT-BDurationoftheB Sweepisdisplayed

asanintensifiedportionof

theA Sweep.

BDLY'DDelayedB sweep

DUALDualsweep— A andB sweeps,

independently

X-YX-Ydisplaymode

2-1

SPECIFICATIONS

ASweeptime:20ns/div

0.5s/div

in23

ranges,

-2-5

sequence,

verniniercontrolprovides

fullyadjustablesweeptime

betweensteps.

BSweeptime:20ns/div

50ms/div

in20

ranges,

-2-5

sequence.

Accuracy:

+3%(10~

35°C)

±6%(0~50°C)

Sweepmagnification:

X10

±5%

(10~

35°C)

±7%

(0~

50°C)

Linearity:20ns/div

0.5s/div

±3%

(±5%

with

X10

magnification)

HOLDOFF:Continuouslyadjustable

forA

Sweephold

off

timefrom

NORM

toX5.

Traceseparation:

positionable

upto4

divisionsseparatedfrom

Sweep,continuouslyadjustable.

Delaymethod:Continuousdelay.SYNCdelay

Delaytime:

0.2to10

times

the

sweeptime

from200ns

0.5s,

continu-

ouslyadjustable.

Timedifferencemeasurementaccuracy:

±2%

(10

~ 35°C)

±4%(0

50°C)

Delayjitter:

/20000

the

fullscale

sweeptime.

TRIGGERING

ATRIG

Atriggermodes:AUTO.NORM,SINGLE,

FIX:

the

center

the

waveform

Triggersource:

MODE.

CH1,CH2.(EXT)

CH3

1/1and

1/10

Couplingmodes:

AC,

LFREJ,

HFREJ,

DC,

VIDEO

VIDEO-LINEsyncautomatically

selected

sweeptimes

50yus/div

20ns/div.

VIDEO-FRAMEsyncautomatically

selected

sweeptimes

of0.5s/div

0.1

ms/div.

Triggerlevel:±90°adjustable

Polarity:

—

BTRIG

BtriggermodesSTARTSAFTERDELAY,

TRIGGERABLEAFTERDELAY

Triggersource:

CH1,CH2,(EXT)CH4

1/1and

1/10

Coupling

modes:AC,

LFREJ,

HFREJ,

Triggerlevel:±90°adjustable

Polarity:

+ /

—

Triggersensitivity

and

COUPLING FREQRANGE MINIMUMSYNCAMPLITUDE

COUPLING FREQRANGE INT EXT EXT1

DC DC

- 20

MHz

- 50

MHz

100MHz

05div

1Odiv

15div

50mV

100

150

05V

AC Same

asforDCbut

withincreasedminimumlevel

for

below

20Hz

HFn[j Increasedminimumlevelbelow

and

above

KHZ

LFfuj

Increasedminimumlevelbelow

30kHz

VIDEO FRAMELINE 05div 50

AUTO:

Same

abovespecifications

for

above

30Hz.

FIX:

Hz~20

MHz1.0div(100mV)

40Hz'vSO

MHz1.5div

(150

mV)

Jitter:0.5nsmaximum

MHz

2ns/divsweeprate

(X1

MAG

on)

CALIBRATINGVOLTAGE

AND

CURRENT

kHz±3%

Positivesquarewave

0.3V±1%

(10

- 35C)

(0- 50C)

10mA

±2%(10

- 35C)

±4%

(0- 50C)

INTENSITYMODULATION

Inputsignal:

TTL

level,intensityincreasing

withmorepositivelevels

Inputimpedance:Approx.

10kO

Usablefrequencyrange:DCto

MHz

Maximuminputvoltage:

50V

(DC

+ AC

peak)

VERTICALAXISOUTPUTSampled

CH1

output

Outputvoltage:

mVp-p/div(into

500

load)

Outputimpedance:Approx.

500

Frequencyresponse:

DCto100MHz(

—

3 dB)

(into

500

load)

GATEOUTPUT

(AandB)

Outputvoltage:Approx.

1.5V

positivegate

(into5000load)

TRACEROTATIONElectrical,adjustable

POWERSUPPLY

Linevoltage:

LOW:90- 132V

HIGH:

180~

264V

Linefrequency.50/60

Powerconsumption:Approx.

56W

DIMENSIONS

Width:

284mm

(328

mm)

Height:

138mm

(150

mm)

Depth:

400mm

(471mm)

(

)

dimensionsincludepro-

trusionsfrombasiccaseout-

linedimensions.

2-2

SPECIFICATIONS

WEIGHT7 4 kg

ACCESSORIES

PC-29Probes2

InstructionManual1

HandBook1

ACpowercord1

PanelCover1

Probeholder1

OPTION

AccessoryBag(MC-78)

PRECAUTIONSFORUSE

1)Donotapplyinputvoltageexceedingtheirmaximum

ratingand. neverapplyexternalvoltagetotheinput

terminals.

andCH2:

1Mil. 500Vp-por250V(DC+ ACpeak)

500:

5VrmsorDC±5V

CH3andCH4:50V(DC•+-ACpeak)

Z-axisInput:50V(DC+ ACpeak)

2)Thefollowingconditionsshouldbeavoided:

(a)Directsunlight

(b)Hightemperaturesandhumidity

(c)Mechanicalvibration

(d)Proximitytoelectricalnoiseortransientgenerating

machinery.

3)Donotusemorethantherequiredbeamintensity.

4)Donotleavethebeamstationaryforlongperiods.

5)TheCS-2100Amakesuseofinternalbatterywhich,if

depleted,

cancausethepanelLED'snottolightupontur-

ningtheunitON.Ifthisoccurs,refertotheinstruction

manualforinstructionsonreplacingthebattery.

6)Topreventelectricalshocks,besuretoconnecttheGND

terminaltoanappropriateearthpoint.

7)Coolingprecautions.

TheCS-2100Aisprovidedwitha convenientcarrying

han-

dlewhichdoublesasa standtoadjusttheviewingangle.

Whileanyarbitraryanglemaybeset,besurethatnoob-

jectsareallowedtorestonthetopoftheunitorthatthe

coolingventsarenotblocked,sincethiswillcauseanun-

duetemperatureriseintheCS-2100A.

8)SincetheCS-2100Amakesuseofhighvoltagecircuitry,if

removingthecase,refertothe"MAINTENANCE"for

removingthecase.

9)ACvoltageselectorswitchsetting.

Stopper

MADEINJAPAN MADEINJAPAN

1Removescrewandstopperplate.

2Switchlevertooppositeside.

3Lockleverbyattachingstopperplatetooppositesidescrew.

2-3

ENVIRONMENT

Operatingtemperatureand

humidityforguaranteed

specifications:10~ 35°C,85%maximumRH

Fulloperatingrange:0 ~ 50°C,90%maximumRH

Storagetemperatureand

humidityrange:—20°~ 55°C

80%

maximum

Altitude:

Operating:5000m

Non-operating:12000m

CAUTION:

BeforeapplyingpowertotheCS-2100AbesurethattheLine

VoltageSwitchissettothepropervoltage.Ifthisisnotdone

damagetotheCS-2100Acouldresult.

Afterverifyingthesetting,connecttheACPowerCordtothe

linepowersource.

CONTROLSANDINDICATORS

FRONTPANEL

VERTICALAXISCONTROL

(DVOLTS/DIV

Verticalattenuatorforchannel1;providesstep

adjustmentofverticalsensitivity.WhentheVARIABLE

controlisturnedtotheCALposition,theverticalsensitivity

iscalibratedin10stepsfrom5V/divto5 mV/div.ForX-Y

operationthiscontrolprovidesstepadjustmentofvertical

sensitivity.

(2)VARIABLE

FineadjustmentcontrolCH1verticalattenuation.This

controlprovidescontinuousadjustmentbetweenthe

VOLTS/DIVranges.Whensettoitsextremeclockwise

(CAL)position,theattenuatoriscalibrated.ForX-Y

operation,

thiscontrolservesastheY-axisattenuationfine

adjustment.Asthisfineadjusterusesa variableresistor

witha centertap,theamplitudesometimesdoesnot

changeduringrotation.

(3)$ POSITION/PULLX5GAIN

Thisisa potentiometercontrolwithanaddedswitch

function.

ItservesastheCH1verticalpositioncontrolfor

normaloperationandX-Yoperationas

well.

Whenpulled

out,theVOLTS/DIVsettingismultipliedby5 andforX-Y

operationtheY-axissensitivityismultipliedaccordingly.

InX5GAINmode,theverticalgainisincreasedandthe

tracebecomesthickness.

(4)UNCAL

ThisLEDlightstoindicatethatCH1isnotcalibrated,i.e.,

thattheVARIABLEcontrolisnotintheCALposition.

(5)PULLX5GAIN

ThisLEDlightstoindicatethattheCH1$ POSITION

controlisinthepulledoutposition,i.e.thattheCH1

sensitivityisfivetimestheVOLTS/DIVsetting.

(6)AC-GND-DC

ThisswitchistheCH1verticalaxiscouplingmode

selector,forX-Yoperation,theY-axiscouplingmode

control.

AC:

ACinputcoupling,withblockingofanyDCsignal

component.

GND:

Verticalamplifierisdisconnectedfromtheinput

signalandconnectedtoground.Thismodeis

usefulindeterminingtheactualgroundpotential.

DC:

DCcoupling,withboththeDCandACcomponents

oftheinputsignaldisplayedontheCRT.

(7)PUSH5012

ThiscontrolselectstheCH1inputresistancebetween

50i2and1 Mfi.Inthedepressedpositiontheinput

resistanceis5012.

I—CAUTIION:

Inthe50Q inputmode,themaximuminputvoltageis

5VrmsorDC±5V.Careshouldbetakennottoexceed

thislevelasdamagetotheCS-2100Acouldresult.

3-1

CONTROLSANDINDICATORS

(8)INPUT

CH1verticalinputconnector;servesalsoastheY-axis

inputconnectorforX-Yoperation.

(9)VOLTS/DSV

Verticalattenuatorforchannel2;providesstep

adjustmentofverticalsensitivity,VARIABLEcontrolistur-

nedtotheCALposition,theverticalsensitivitycalibrated

in10stepsfrom5V/divto5 mV/div.ForX-Yoperation

thecontrolprovidesstepadjustmentofhorizontal

sensitivity.

(10)VARIABLE

CH2verticalattenuationfineadjustment.Operationis

similartothatoftheCH

VARIABLEcontrol.ForX-Y

operationthecontrolservesastheX-axisattenuationfine

adjustment.

(11)$ POSITIONX-Y^•/PULLX5

GAIN

Dualcontrolwhichfunctionssimilarlytothecorresponding

CH1control.Inaddition,itservesasthehorizontal

positioncontrolandX-axissensitivitymagnifierforX-Y

operation.

(12)UNCAL

UNCALdisplayforCH2verticalaxisorfortheX-axisfor

X-YoperationwhenCH2VARIABLEcontrolisnotinCAL

position.

(13)PULLX5GAIN

ThisdisplayLEDindicatesthatX5magnificationisineffect

fortheCH2verticalaxisfornormaloperationorthatitisin

effectfortheX-axisforX-Yoperation.

(14)AC-GND-DC

ThisswitchsetstheCH2verticalaxisinputcouplingmode

ortheX-axiscouplingmodeforX-Yoperation.Its

operationissimilartothatofthecorrespondingcontrolfor

CH1.

(15)PUSH5012

ThisswitchselectstheCH2inputresistancebetween

5012and1 MS2.ItservestosimilarlyswitchtheX-axis

inputresistanceforX-Yoperation.Operationisthesame

asforthecorrespondingCH

control.

r-CAUTION:

Thesame5VrmsorDC±5VlimitationappliestotheCH2

inputwhenusingthe50J2inputresistancemodeas

discussedaboveforCH1.

(16)INPUT

CH2verticalinputconnector;servesalsoastheX-axis

inputconnectorforX-Yoperation.

(17)MODE

Verticalaxismodeselectionswitches.

CH1DisplayofCH1inputsignalonly.

CH2DisplayofCH2inputsignalonly.

DUALDisplayofbothCH

andCH2.Forthismode

eitherCHOPorALTmodewillbeineffect,

selectedbythesimilarlynamedswitches.

ADDDisplayofthealgebraicsumofCH

+ CH2

or,ifCH2hasbeeninverted,thedifferenceof

CH1- CH2.

QUADDisplayofCH1throughCH4inputsignals.For

thismodeaswellasforDUAL,eithertheALT

orCHOPmodeisapplicableandselectedby

theappropriatelynamedswitch.

ALTWhenDUALorQUADmodehasbeen

selected,

2 or4 signalinputsaredisplayedin

analternatingfashion.

CHOPSimilartoALTbutinputsignalsaredisplayed

ina choppedfashion.

CH2INVThisswitchinvertsthepolarityoftheCH2

inputsignal.

20MHzBWThisswitchwhentheLEDisindicated,

limitstheverticalbandwidthtoapproximately

20MHz.

[-CAUTION:

Thevariousverticalmodesettingsarerelated

tohorizontalmodeandtriggersource.Seethe

sectionsonHORIZONTALDISPLAYand

SOURCEfora descriptionofthisrelationship.

(18)

BEAM

FINDER

Thispushswitchisusedtoshrink'theCRTdisplayto

alloweasylocationofthebeam.

POWERSUPPLY/CRTDISPLAYCONTROLS

(19)A INTENSITY/BINTENSITY

Thisdualcontrolallowsadjustmentofthebeamintensity

fortheA SweepandB Sweeprespectively.

AINTENSITY(centercontrol)

AdjuststhebeamintensityfortheA Sweep

andthedisplayintensityforX-Yoperation.

BINTENSITY(outercontrol)

AdjuststheintensityoftheB Sweepbeam.

(20)

POWER/SCALE

ILLUM

Thiscontrolservesasthepowersupplyswitchaswellas

theadjustmentforthescaleillumination.

(21)LEDPILOTLAMP

Thislampindicatesthatthepowersupplyhasbeenturned

3-2

CONTROLSANDINDICATORS

(22)FOCUS

Thisfocuscontrolcanbeusedtoadjustthebeamfor

optimumfocus.

Auto-Focuscircuitautomaticallyfocusing,oncethis

controlisadjusteditneedsnotbefrequentlyreadjusted.

(23)CAL

Thisisthecalibrationvoltageoutput.0.3Vp-pat1 kHzis

availableintheformofa squarewavesignal.

(24)GN0

Groundterminal— useittoconnecttheinstrumenttothe

earthground.

HORIZONTALAXISCONTROLS

(25)HORIZONTALDISPLAY

Thiscontrolisusedtoselectthehorizontaldisplaymode.

LED'sindicatewhatmodehasbeenselected.

AOnlyA SweepisoperativewiththeB Sweep

dormant.

ALTA SweepalternateswiththeB Sweep.For

thismodeofoperation,theB Sweep

waveformappearsasanintensifiedsectionon

theA Sweep.

A-INT-BDurationoftheB Sweepappearsasan

intensifiedsectionontheA Sweep.

BDLY'DOnlyDelayedB Sweepisoperative.

DUALA SweepandB Sweepoperateinde-

pendently.Forthismodethetwosweepsare

triggeredbytheA TriggersourceandB Trigger

sourcerespectively.

X-YCH1becomestheY-axisandCH2theX-axis

forX-Yoperation.

ThesettingsoftheverticalMODEandTRIG

MODEareineffective.

(26)A SWEEPTIME/DIV,B SWEEPTIME/DIV

ASWEEPTIME/DIVThisoutercontrolisusedtosetthe

ASweeptimein23rangesin1-2-5

sequencefrom20ns/divto0.5s/div.

BSWEEPTIME/DIVThiscentercontrolsetstheB Sweep

timein20rangesin1-2-5sequence

from20ns/divto50ms/div.This

controlisconstructedtomakeit

impossibletosettheB Sweeptime

slowerthantheA Sweeptime.No

fineadjustmentisavailablefortheB

Sweeptime.

(27)A VAR/PULLCHOPF.SELECT

ThiscontrolistheinnermostcontrolontheSWEEP

TIME/DIVcontrol.ItisthefineadjustmentfortheA

Sweeptime.WhenitisturnedfullyclockwisetotheCAL

position,

theA Sweeptimeiscalibratedtothesettingof

theSWEEPTIME/DIVcontrol.

PULLCHOPF.SELECT

Thechoppingfrequencymaybechangedbypullingthis

controloutward.Thisisusefulincaseswheretheinputsi-

gnalissynchronizedtothechoppingfrequency.

(28)UNCAL

ThisLEDlightstoindicatethattheA VARcontrolisnotset

totheCALpositionandthusthattheA Sweeptimeisnot

calibrated.

(29)DELAYTIMEMULTIPLIER

ThiscontroladjuststhestarttimeoftheB Sweeptosome

delaytimeafterthestartoftheSweep.

Thedelaytimemaybesettovaluesbetween0.2and10

timesthesettingoftheA SWEEPTIME/DIVcontrol.

(30)±TRACESEP/HOLDOFF

$TRACESEP

ThisoutercontrolallowstheadjustmentoftheB Sweepupto

4divisionsbelowtheA Sweep,turningthiscontrolto

counterclockwise.ThisknobiseffectivewhentheHorizontal

DisplayissettoALT.EvenwhentheHorizontalDisplayisset

toDUAL,thisknobiseffectivewiththeV modesettoCH1,

CH2orADD.

HOLDOFF

Adualcontrolincorporatinga switchingfunction.

Asa holdoffadjustment,itallowstheadjustmentofthe

timebetweensuccessivesweeps.Turningthecontrol

counterclockwisefromtheNORMpositionlengthensthe

holdofftimeuntiljustbeforetheB ENDSA whenthe

hold-

offtimeismorethan10timestheNORMvalue.

IntheB ENDSA position(fullycounterclockwise),theA

SweepisresetattheendoftheB Sweep.

BENDSA modeisapplicabletotheALT,A-INT-BandB

DLY'DmodesofHORIZONTALDISPLAY.

(31)««*POSITION/FINEPULLX10MAG

Acombinationadjustment/switchcontrol.

ThiscontrolisnotusedforX-Yoperation.

POSITION

Horizontalpositioncoarseadjustment.

FINEPULLX10MAG

Horizontalpositionfineadjustment.Whenthiscontrolis

pulledout,thesweeptimeismade

0 timesshorter.

3-3

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