Tektronix 511 Bedienungsanleitung

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TYPE 511

CATHODE-RAY

OSCILLOSCOPE

INSTRUCTION

MANUAL

p j

Manufacturers of Cathode-Ray and V deo Test Instruments

SUNSET HIGHWAY AND BARNES ROAD - P.O.BOX 831 - PORTLAND 7, OREGON, U. S. A.

PHONE: CYp ess 2-2611 CABLES: TEKTRONIX

CONTENTS

GENERAL DESCRIPTION SECTION 1

Character st cs. Funct ons of Controls and B nd ng Posts.

OPERATING INSTRUCTIONS SECTION 2

F rst-T me Operat on.

Sweep C rcu t Adjustments--Adjustment of sweep stab l ty. Funct on

of tr gger selector. Adjustment of tr gger ampl tude. Adjustment of

sweep speed. Recurrent sweep. S ngle sweep. Sweep magn f er. Ext.

sweep nput.

Vert cal Deflect on System--Vert cal ampl f er. D rect connect on to

deflect on plates.

Cal brat on--S gnal-cal brate sw tch. Measurement of s gnal ampl 

tudes .

Intens ty Modulat on (Z axs). Sweep Output. Gate Outputs.

CIRCUIT DESCRIPTION SECTION 3

Cathode-Ray Tube C rcu t.

Sweep C rcu ts--Tr gger phase spl tter. Tr gger Ampl f er. Tr gger

coupl ng d ode. Mult v brator. Unblank ng c rcu t. Gate output genera

tor. Sweep generator. Sweep output cathode follower. Sweep magn f er.

Sweep ampl f er.

Vert cal Deflect on System—Probe. Input attenuator. Vert cal ampl f er.

Cal brator C rcu ts.

Power Supply.

MAINTENANCE SECTION 4

Replacement of Components. Removal of Case. Clean ng. Inspect on.

Trouble Analyz ng and Repa r. Voltage and Cont nu ty Tables. Wave

form Photographs.

ADJUSTMENTS SECTION 5

Operat on on 210-250 Volt L ne. Adjustment of: 225 Volt Regulated

Supply, H gh Voltage Supply, Sweep Speed Cal brat on, Input Attenuator,

Vert cal Ampl f er H.F. Response, Vert cal Ampl f er L.F. Response,

Cal brator Voltage.

Exter or and Inter or Photographs.

PARTS LIST AND DIAGRAMS SECTION 6

VIDEO DELAY NETWORK AND CIRCUIT DIAGRAM SECTION 7

511 AA

NOTE

Th s nstruct on manual has been prepared to

cover TEKTRONIX Type 511, 511A and 511 AD

Osc lloscopes of all ser al number ranges. The

" Type 511A” des gnat on s used throughout the

text and w ll apply to the Type 511 and 511 AD un

less noted otherw se by the nsert on of ser al

number range notat ons. The Type 511 ser al

number range s 101 to 454 and the Type 511A s

455 and up. The Type 511 AD Osc lloscope s

dent cal to the Type 511A except that t ncludes

a factory nstalled Type 1-AD-25 Delay Network.

Text, d agrams, and parts l sts have been expanded

to ncorporate all c rcu t mod f cat ons adopted

dur ng the course of manufacture. The ser al

ranges of nstruments to wh ch var ous mod f 

cat ons were appl ed before sh pp ng from the

factory have been noted wherever necessary.

However, because many nstruments have been

mod f ed n the f eld and out of ser al sequence,

component values and c rcu try of a g ven nstru

ment may d ffer cons derably from those nd cated

n th s manual for ts ser al number. The user s

urged, therefore, to enter whatever changes may

be necessary to br ng th s manual nto agreement

w th the present c rcu try of h s osc lloscope.

When order ng parts, always nclude the fol

low ng nformat on:

1. Instrument Type (511, 511A or 511AD).

2. Instrument Ser al Number (as, SN 9999).

3. Part C rcu t Number (as, R999).

4. Part Descr pt on (value, type, rat ng, toler

ance, etc.).

5. The 6-d g t TEKTRONIX part number (as,

999-999).

__________________________________

SAFETY NOTICE

Th s osc lloscope employs dangerously h gh voltages. S nce

some ma ntenance must be performed wth the case removed,

great care should be taken. Use only nsulated tools, stand on

a dry floor and f poss ble keep one hand n your pocket. Care

should also be used n mak ng any connect ons to the deflect on

plates of the cathode-ray tube through the access panel. It s

adv sed that the access panel never be removed unt l the power

has f rst been turned off. The nstrument should not be operated

w th th s protect ve cover removed.

__________________________

SECTION 1

GENERAL DESCRIPTION

!

f

!

The Tektron x Type 511A Cathode-Ray Osc lloscope s a

w de range, portable nstrument, mak ng poss ble the observa

t on of a w de var ety of electr cal waveshapes. It s pr mar ly

ntended for laboratory and shop use, n the development and

test ng of all types of electron c equ pment.

The Type 511AD Osc lloscope s dent cal to the Type 511A

except that t ncludes a factory- nstalled Type 1-AD-25 Delay

Network.

CHARACTERISTICS

S gnals observable:

1. S ne waves from 10 cycles to 10 me.

2. Pulses of .1 m crosecond to 1/50 sec.

Sweep C rcu t

ampl f er.

Max mum deflect on sens t v ty 1.5 v per cm DC

or peak-to-peak AC. Band w dth, DC to 800 kc

(3 db down at 800 kc).

Vert cal Deflect on C rcu t

Hard tube type, e ther tr ggered or recurrent

as des red.

Sweep Speeds

Cont nuously var able from .01 sec. per cm

to .1 m crosecond per cm.

Tr gger Requ rements

.5 to 15 v (Peak) s ne wave or pulse of e ther

polar ty. Pulse as short as .05 m crosecond w ll

tr gger sat sfactor ly. A key connected between

TRIGGER INPUT and GND. s su table for tr g

ger ng s ngle sweeps. Below S/N 720, a3 v bat

tery and key connected n ser es s su table.

Sw tch perm ts s gnal nput connector on panel

to be connected to deflect on plates d rectly, v a

capac tor (RC =.l sec), v a 1 ampl f er stage, or

v a 2 ampl f er stages.

Input Attenuator

Frequency compensated RC type w th attenua

t on rat os of 2, 4, and8. (S/N 101-454, ATTEN.

5X b nd ng post allows add t onal attenuat on.)

Vert cal Deflect on Sens t v ty

Wthout ampl f er 27 v/cm (5CP1A) or 13

v/cm (5ABP) max mum, 200 v/cm m n mum,

DC or peak-to-peak AC.

Sweep Lag

CRT s unblanked and sweep s operat ng

l nearly n less than. 1 m crosecond after rece pt

of an nf n tely sharp tr gger pulse.

Sweep Magn f cat on

Any des red 20% of the sweep can be spread

over the ent re trace except for sweep speeds

faster than .5 m crosecond per cm.

1 Stage, 2.7 v/cm (5CP1A) or 1.3 v/cm (5ABP)

max mum, 40 v/cm (5CP1A) or 20 v/cm(5ABP)

m n mum.

2 Stages, .27 v/cm (5CP1A) or .13 v/cm(5ABP)

max mum, 4 v/cm (5CP1A) or 2 v/cm (5ABP)

m n mum.

(Sens t v ty s reduced by a factor of 10 when

probe s used.)

IN NO CASE SHOULD THE COMBINED AC AND

DC INPUT VOLTAGES EXCEED 600 V PEAK.

External Sweep Input Input Impedance

DC coupled v a 100 K potent ometer and sweep 1 meg shunted by 40 p/ f (+or-5%) for any

TYPE 511-GENERAL DESCRIPTION PAGE 1-1

sett ng of the nput selector and nput attenuator.

(S/N101-454, 5 meg. shunted by 12 jupf when

us ng the ATTEN. 5X b nd ng post.)

Wth probe, 10 megohms shunted by 14 p/f.

Vert cal Ampl f er Bandwdth

1 stage, down 3 db (Max) (from 1 me response)

at 5 cps and 10 me.

2 stages, down 3 db (Max) (from 1 me response)

at 5 cps and 8 me.

Vert cal Ampl f er Trans ent Response

R set me, 1 stage, .04 m crosecond (10%

to 90%) 2 stages, .05 m crosecond (10% to 90%).

Cal brat ng Voltage

Cl pped s ne wave of power l ne frequency.

S x ranges 0-.3, 0-1, 0-3, 0-10, 0-30, 0-100

volts peak-to-peak. Accuracy for l ne voltages

from 105 to 125 v s +or-5% of full scale. A

pos t on on the SIGNAL CALIBRATE sw tch

allows the use of an external cal brat ng source

when des red. (Below S/N 2406—S ne wave of

power l ne frequency. Three ranges 0-1, 0-10,

0-100 v peak-to-peak.)

Waveforms Ava lable Externally:

Sweep sawtooth, 20 volts peak.

Pos t ve and negat ve gate, 40 v peak, same

durat on as sweep.

Connect on to CRT Cathode

V a .1 / f capac tor. RC=.012 sec.

Accelerat ng voltage on cathode-ray tube, 3KV.

Power Requ rements. 105-125 volts,or210-250

volts, 50-60 cycles, 230 watts. (See Sect on 5.)

We ght, 50 pounds.

D mens ons, 15 1/2” h gh, 121/2" w de,211/2”

deep.

F n sh. P anel, photo - etched alum num w th black

letters. Cab net, gray wr nkle.

FUNCTIONS OF CONTROLS AND BINDING POSTS

A br ef explanat on of the funct on of each control and b nd ng

post s g ven below. For a more deta led explanat on consult

Sect on 3, C rcu t Descr pt on.

PANEL MARKINGS EXPLANATION

INPUT CHAN. SEL.--Gang sw tch perm tt ng the

nput s gnal to be connected to the vert cal

deflect on plates e ther d rectly, v a a .1 pf

capac tor, 1 stage ampl f er, or 2 stage

ampl f er.

INPUT ATTENUATOR--Four pos t on RC com

pensated attenuator located between the SIG

NAL CALIBRATE sw tch and INPUT CHAN.

SEL. for reduc ng the voltage of s gnals wh ch

would otherw se produce excess ve deflect on

or overload the ampl f ers.

VERT. AMPL. ATTEN.--500 ohm potent ometer

n cathode of cathode follower perm ts adjust

ng ga n of s gnal ampl f er.

PANEL MARKINGS EXPLANATION

SIGNAL—CALIBRATE--Sw tch wh ch connects

arm of INPUT ATTENUATOR to EXT. CAL.

b nd ng post, SIGNAL INPUT b nd ng post,

or l ne-frequency cal brat ng voltages.

SIGNAL INPUT--Coax al (b nd ng post,S/N101-

454) connector perm ts connect on of the low-

capac ty probe or b nd ng-post adapter.

ATTEN. 5X--S gnal nput b nd ng post hav ng

h gher mpedance but attenuat ng s gnals 5

t mes (S/N 101-454).

DELAY (511 AD only) --Two pos t on sw tch wh ch

perm ts the Type 1-AD-25 Delay Network to

be sw tched n or out of the v deo ampl f er.

PAGE 1-2 TYPE 511-GENERAL DESCRIPTION

PANEL MARKINGS EXPLANATIONS PANEL MARKINGS EXPLANATIONS

VERT. POSITION--Tw n potent ometers con

troll ng average potent als of vert cal deflec

t on plates and therefore the mage pos t on.

CAL. VOLTAGE--Potent ometer for adjust ng

the cl pped (uncl pped, below S/N 2406) s ne

wave cal brat ng voltage of l ne frequency on

ranges determ ned by the sett ng of the SIG-

NAL-CALIBRATE sw tch.

CRT CATHODE--B nd ng post perm tt ng con

nect on of external modulat ng s gnals to the

cathode of the cathode-ray tube v a a .1 jif

capac tor. RC =.012 sec.

GND.--Connect on to frame of osc lloscope.

ASTIGMATISM--Potent ometer vary ng poten

t al on Anode No. 2 w th respect to the de

flect on plates. Correct adjustment of th s

control makes poss ble a sharp focus of the

mage n both d rect ons s multaneously.

SCALE ILLUM.--Var able res stor controll ng

br ghtness of the lamp wh ch llum nates the

plast c grat cule over the face of the cathode-

ray tube.

INTENSITY--Potent ometer controll ng the av

erage gr d voltage of the CRT and thereby

the br ghtness of the mage.

POWER--On-off sw tch n the AC l ne voltage

supply to the osc lloscope.

FOCUS--Potent ometer controll ng the voltage

appl ed to the focus anode of the CRT and

thereby the sharpness of the mage.

HOR. POSITION--Potent ometer controll ng the

b as appl ed to gr d of one sweep ampl f er

tube and thereby the pos t on of the mage.

SWEEP OUTPUT--B nd ng post connected to

sweep generator v a cathode follower.

SWEEP MAGNIFIER POSITION--Potent ometer

controll ng voltage appl ed to gr d of sweep

magn f er (VI1) and thereby determ n ng por

t on of sweep to be magn f ed. When turned

to OUT sweep magn f er s d sconnected from

the c rcu t.

SWEEP SPEED MULT.--Decade control plus

vern er control sett ng sweep speed and dura

t on wthn range nd cated by SWEEP RANGE.

(A s ngle control, S/N 101-1405).

EXT. SWEEP ATTEN.--Potent ometer control

l ng the fract on of the voltage appl ed to

EXT. SWEEP INPUT b nd ng post wh ch w ll

reach the gr d of the sweep ampl f ers when

the SWEEP RANGE sw tch s set n the EXT.

pos t on.

EXT. SWEEP INPUT - -B nd ng post connect ng to

sweep ampl f er v a EXT. SWEEP ATTEN.

when SWEEP RANGE sw tch s n EXT. pos 

t on. (100 K nput mpedance).

CAL. INPUT--B nd ng post connect ng to EXT.

CAL. pos t on of SIGNAL-CALIBRATE sw tch

perm tt ng an external cal brat ng s gnal

source to be permanently connected to the

osc lloscope.

May be used as aux l ary s gnal nput.

CAL. OUTPUT--B nd ng post connected to arm

of CAL. VOLTAGE potent ometer perm ts

use of nternal cal brat ng voltage as an

external test s gnal of known ampl tude.

+ GATE - - B nd ng post for connect on to the cath

ode of the gate phase spl tter (V8). Th s

furn shes a 40 v peak pos t ve pulse of the

same durat on as the sweep.

-GATE--B nd ng post for connect on v a .1 jif

capac tor to the plate of (V8). Th s furn shes

a 40 v negat ve pulse of the same durat on

as the sweep.

SWEEP RANGE--Gang sw tch select ng appro

pr ate coupl ng capac tors determ n ng mult 

v brator length and sweep speed. When set to

EXT. the sweep ampl f er s connected to

EXT. SWEEP INPUT post n place of the os

c lloscope’s l near sweep.

SWEEP STABILITY--Var able res stor control

l ng b as on gr d of V4 n the mult v brator

c rcu t. Th s b as determ nes whether the

sweep w ll operate recurrently or must be

tr ggered.

TRIGGER SEL.--Sw tch determ n ng source and .

polar ty of tr gger voltage.

TYPE 511-GENERAL DESCRIPTION PAGE |-3

PANEL MARKINGS EXPLANATIONS PANEL MARKINGS EXPLANATIONS

pos t on of TRIGGER SEL. sw tch.

DEFLECTION POLARITY---Three-pos t on le

ver sw tch mounted at the rear s wh ch changes

the V19 operat ng b as and the screen volt

age on V18 and V19, thus prov d ng greater

und storted deflect on when observ ng pulses.

D al read ngs: EXT.

CAL., SIGNAL, X.l,

XI, X10-S/N101-2405

SWEEP SPEED MULT,

was a s ngle d al from

S/N101-1405

TRIGGER AMPL.— Potent ometer controll ng

the b as appl ed to the tr gger ampl f er tube

(V2) and thereby determ n ng the ampl tude

of tr gger s gnals appl ed to the mult v brator.

TRIGGER INPUT— B nd ng post connect ng ex

ternal tr gger sources to +EXT. and -EXT.

+ SIGNAL DEFL. and

arrows added at approx.

S/N 2869

PAGE 1-4 TYPE 5 1 I —GENERAL DESCRIPTION