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is 

turned

 

to

 

the

 

OUT 

position

 

which 

operates

 

a

 

SPDT

 

switch

 

connecting

 

the

 sweep amplifier

 

directly 

to

 the

 

plate

 

of

 the

 

sweep

 

generator.

Sweep

 

Amplifier

The

 sweep

 voltage

 

at

 the

 plate

 of

 V9

 

is

 only

 about

 

20

 

V

 

amplitude.

 To

 

sweep

 

the 

spot

 

across

 

the screen, 

about

 350 

V is 

necessary. 

The sweep

 

amplifier

 provides 

the

 

necessary 

amplification

 

and

 

in

 

addition

 

converts

 

the

 single 

sided

 

voltage

 from

 the sweep

 

generator into 

a

 

balanced 

voltage suitable

 

for

 

deflecting

 

the

 

beam. 

This 

balanced

 

voltage

 

is

 

necessary

 

to

 maintain

 the

 

aver

­

age

 

potential

 

of the 

deflection

 

plates

 constant

 over

 the 

entire

 sweep,

 

and

 

thus 

prevent 

defocussing.

 

The

 am­

plifier

 

which

 

does

 

this

 

uses a 

cathode

 

coupled 

circuit 

consisting

 

of

 

the

 triode

 connected 

6AU6

 

tubes

 

V13

 

and

 

V14.

 

The 

action

 

of

 this

 

circuit

 is 

the

 same 

as

 

described 

for 

the

 

sweep 

magnifier

 

except

 

that

 

load 

resistors

 are

 

present

 in 

both 

plates.

 The 

HOR.

 

POSITION 

control

 

varies 

the 

bias

 on

 V14 

and

 thus determines 

the

 

position

 

from

 which

 

the

 

sweep 

starts.

 To

 insure

 

that

 the

 

sweep

 

will

 

always

 start 

at the

 

same 

point

 

on

 the

 

screen

 

each

 

time

 

(at

 

a

 

given

 

setting

 of

 

the

 HOR.

 

POSITION

 

control), 

the

 

6AL5

 

restorer

 diode

 

V12

 

is 

connected 

between

 

the 

grid

 of 

V

13

 and

 ground. 

This

 

diode

 removes 

any

 

charge

 

which 

C20 

may

 have 

gained

 

during

 

the

 

sweep.

High frequency

 

compensation

 provides

 sufficient

 

band

 width 

to

 amplify the 

1

 

microsecond sweep

 

with

 

good

 

linearity.

This

 

is

 

accomplished

 

by

 

the

 bypassing 

effect

 

of

 

C22,

 

which

 

at 

high 

frequencies

 

reduces

 

the

 degeneration 

in­

troduced

 

in

 the cathode

 

circuit

 by

 

R65

 

and

 

R66. Addi

­

tional

 

compensation

 is 

provided 

by

 

the

 

inductance

 

of

 

R69

 

and

 

R63.

When 

the

 SWEEP

 

RANGE 

switch

 

is

 

on

 

the

 

EXT. 

posi­

tion,

 

the

 

input to the 

sweep

 amplifier

 is

 

shifted

 

from

 

the 

sweep

 

generator 

to

 the

 

arm

 

of

 

the EXT. 

SWEEP

 

ATTEN.

 

potentiometer.

To obtain

 

good

 

focus

 

on

 a 

cathode

 

ray

 tube,

 it

 

is

 nec­

essary

 that 

the

 

final

 anode

 and 

both

 

pairs

 

of

 

deflection

 

plates

 have

 

approximately

 the

 same 

average 

potential. 

Since

 

it 

is

 

necessary 

to 

have

 

the

 

vertical

 

plates

 

at 

ground

 

potential

 so 

that

 

a

 

direct

 connection

 

can 

be 

made,

 the 

average

 

potential

 of

 

the

 

horizontal

 plates 

must 

also

 

be

 near

 ground.

 

The

 

mean

 potential

 

of

 

the

 

sweep 

amplifier 

plates is

 

about 

+

250

 V. 

This

 is 

moved down 

to

 ground

 

by

 means

 

of the

 

group

 

of

 

neon

 

glow 

lamps.

 

A

 steady current of

 

about

 200

 microamperes

 

keeps

 

them 

ionized

 so

 

that

 

any

 

changes

 

in

 

the

 

plate

 potentials

 of 

the

 

sweep

 amplifiers

 

appear

 on

 

the

 

deflection

 plates

 

unchanged

 

in 

amplitudes,

 

but

 moved down

 250

 

V. 

The 

biasing

 

current

 

is

 

obtained from

 

the

 

—

1500

 

V 

cathode 

ray

 power 

supply

 

via

 

the

 

voltage

 

dropping

 

resistors

 

R153

 

and 

R154.

 

Since

 

the

 

impedance of

 the

 neon 

glow 

lamps

 

is

 

rather high

 

at

 frequencies involved

 

in

 the 

fast

­

est

 

sweeps, 

C24

 

and

 

C25

 

are

 

shunted

 

across

 

them

 

to

 

transmit

 

these

 

frequencies.

VERTICAL

 

DEFLECTION SYSTEM

The

 

vertical

 

deflection

 

system

 provides

 

the

 

means

 

of

 

attenuating

 or amplifying

 input 

signal amplitudes 

so

 

that

 

they

 

may present

 a

 

convenient

 

image 

on

 the

 cath

­

ode

 

ray

 

tube.

 

Signals

 

may

 be

 

attenuated

 

as

 

much 

as

 

8

 

times

 

or 

amplified as 

much

 as 100

 times 

without 

ap

­

preciable

 change 

in

 

shape.

Probe

A frequency

 

compensated

 

signal input 

probe 

is

 sup­

plied

 

to 

provide

 

reduced

 

loading

 on

 

the

 

circuit

 

under 

observation. 

It

 

consists

 

of

 

a

 

9 

megohm

 

series

 resistor 

paralleled

 with a compensating capacitor,

 and

 

provides

 

an

 

input

 

impedance 

of

 

10

 megohms 

shunted by 14

 

mmfd.

CAUTION—

ALTHOUGH 

THE

 

PROBE 

IN

­

TRODUCES 

A

 

SIGNAL ATTENUATION

 

OF

 

10

 

TIMES,

 

IT 

SHOULD

 

NOT

 

BE

 

CON­

NECTED

 TO

 

CIRCUITS 

WITH

 

PEAK

 

VOLT­

AGES

 

EXCEEDING

 

600

 

VOLTS.

Input

 

Attenuator

All 

signals

 

and calibrating voltages pass 

through

 

a

 

four

 

position, 

RC

 

compensated

 

attenuator

 

having

 

at

­

tenuation

 

ratios

 

of

 

1,

 

2,

 4 and

 

8.

 

If

 a

 

conventional

 

resis

­

tance

 

voltage

 

divider

 

is

 

shunted

 

by

 

capacitors

 whose 

values

 bear

 

the

 

inverse ratio to

 

the

 resistor

 values,

 

the

 

attenuation 

is

 independent 

of

 

frequency.

 

The

 

attenuator 

is

 

designed

 

to

 

have 

an

 

input 

resistance

 

of

 1

 meg

 

shunted

 

by

 

40

 

mmfd

 

for all positions.

 

Since

 the 

input

 

circuits 

to

 

the

 

amplifiers

 

and

 deflection plate

 are arranged

 to pre

­

sent 1

 

meg

 shunted by

 

40 

mmfd,

 

the

 

values

 

chosen

 

for

 

the

 

attenuator

 

are

 

such

 

that

 

correct

 

operation

 

is

 obtained 

when

 these 

values

 are

 

in

 

parallel

 

with 

the

 

shunt

 

arm.

 

The 

capacitors

 

C32,

 C35, and 

C38

 

shunted

 

across 

the

 

attenuators 

have

 

no

 

effect

 

on

 the

 attenuation

 ratio

 

but 

are 

adjusted

 so as

 

to

 

keep

 

the

 

input

 capacity 

at 

40

 

mmfd.

Vertical 

Amplifier

The

 Type 

511A contains 

a

 

wide

 range

 two stage

 

ver­

tical

 

amplifier with 

a 

switching

 

arrangement 

so

 

that 

only

 one 

stage

 

may

 be 

used

 

if desired.

 

The

 

first

 

stage 

which

 

is

 used

 only

 in

 the 

2

 

STAGES

 

position

 

of

 

the

 IN­

PUT

 

CHAN.

 

SEL.

 

switch

 

uses

 

a

 

6AG7

 

tube

 

V1

6.

The 

output 

stage is 

a

 

cathode 

coupled,

 

push-pull 

6AG7

 

stage,

 

providing

 

approximately 110 

V

 

of

 

undis

­

torted

 

output.

 

The

 

operation

 

of

 

this

 

stage

 

is

 the

 same as 

that

 

of

 the

 

sweep

 

amplifier stage.

 The use 

of

 a 

push

 

pull

 

stage

 

is

 required

 

to

 

give 

sufficient

 

output

 and 

maintain 

the 

average

 

potential of the

 

deflection

 

plates 

constant 

so

 as

 

to

 

prevent

 

defocussing

 the 

beam. Low

 

frequency

 

compensation

 

is

 

provided

 

to

 correct

 

for the

 

effect

 

of

 

the

 

coupling

 

capacitors.

 

The 

resistors

 

R110

 

and

 

R125 along

 

with

 the

 

capacitors 

C51A 

and 

C51B

 

provide

 

a 

rising

 

low

 

frequency

 

characteristic together

 

with 

a

 

phase

 

cor

­

rection.

 

To

 

take 

up

 variations in 

the

 

component 

values, 

the

 

grid 

resistor

 

R116

 

is

 

made

 

adjustable.

 The 

procedure 

for

 

this

 

adjustment is given

 in

 

Section 

IV.

 The induct­

ances,

 

L7,

 

L8,

 L9

 

and 

L10

 

provide 

the

 

high

 frequency

 

compensation.

 

A

 

four

 

terminal

 

coupling 

network

 is 

used

 

to

 

give 

the

 greatest 

possible 

bandwidth.

 

Every 

SECTION 3, PAGE 3

TYPE

 511-A, 511-AD

Summary of Contents for 511A-AD

Page 1: ......

Page 2: ......

Page 3: ...E 511A AD SERIAL NUMBER _________________________ INSTRUCTION MANUAL MANUFACTURERS OF CATHODE RAY AND VIDEO TEST INSTRUMENTS Sunset Highway and Barnes Road P O Box 831 Portland 7 Oregon U S A Phone CYpress 2 2611 Cables Tektronix ...

Page 4: ......

Page 5: ...uator Frequency compensated RC type with attenuation ratios of 2 4 and 8 Vertical Deflection Sensitivity Without amplifier 27 V per cm maximum 200 V per cm minimum DC or peak to peak AC 1 Stage 2 7 V per cm maximum 40 V per cm mini mum 2 Stages 27 V per cm maximum 4 V per cm mini mum Sensitivity is reduced by a factor of 10 when probe is used In no case should the combined AC and DC input voltages...

Page 6: ...EED MULT Decade control plus vernier control setting sweep speed and duration within range indicated by SWEEP RANGE VERT POSITION Twin potentiometers controlling aver age potentials of vertical deflection plates and therefore the image posi tion EXT SWEEP ATTEN Potentiometer controlling the fraction of the voltage applied to EXT SWEEP INPUT binding post which will reach the grid of the sweep ampli...

Page 7: ... grid of V4 in the multivibrator circuit This bias determines whether the sweep will operate recurrently or must be triggered DEFLECTION POLARITY Switch determining source and polari ty of trigger voltage Potentiometer controlling the bias ap plied to the trigger amplifier tube V2 and thereby determining the ampli tude of trigger signals applied to the multivibrator Binding post connecting externa...

Page 8: ......

Page 9: ...sine wave appears The oscilloscope is now observing the 50 60 cycle power line waveshape clipped by the calibrator cir cuits To observe other waveshapes connect them to the SIG NAL INPUT binding post turn the SIGNAL CALIBRATE switch to SIGNAL select the appropriate sweep speed etc SWEEP CIRCUIT ADJUSTMENTS The sweep circuit of the Type 511A is different from the gas tube type usually employed in p...

Page 10: ...y different tubes etc by a screwdriver adjustment inside the case Procedure for adjustment of this control is described in Section IV Recurrent Sweep In case it is desirable to have a sweep without using any sort of trigger merely advance the SWEEP STABILI TY control until a stable sweep is obtained This sweep is the conventional sawtooth variety as used in most oscilloscopes Single Sweep The trig...

Page 11: ...le if desired by in creasing L6 and readjusting L7 L8 L9 and L10 but overshoot will occur on steep wave fronts With opti mum transient response the rise time 10 to 90 of full amplitude is 04 microseconds or better At the low frequency end of the band the top of a 10 000 micro second square pulse will not depart by more than 5 from flatness The deflection sensitivity is approximately 2 7 V per cm p...

Page 12: ...e is now equal to the signal amplitude CAUTION IF THE INPUT PROBE ATTEN 10X IS USED THE SIGNAL AMPLITUDE IS EQUAL TO TEN TIMES THE CALIBRA TION VOLTAGE The scale on the CAL VOLTAGE potentiometer is calibrated in peak to peak volts If a sine wave is being measured this may be converted to R M S by dividing by 2 828 CAUTION DO NOT OVERLOAD THE AMPLIFIERS WHEN MAKING AMPLI TUDE MEASUREMENTS Another m...

Page 13: ...2 7 0 180 120 6 0 DEGREES OF PHASE SHIFT FREQUENCY TEKTRONIX JNC 12 28 50 ...

Page 14: ......

Page 15: ... TRIGGER SEL switch is in the INT or EXT positions signals are taken off the cathode of VI and do not change in polarity Therefore a positive impulse must be supplied by the external source or vertical amplifier as the case may be With the TRIGGER SEL in the INT or EXT positions signals are taken off the plate and reversed in polarity thus providing the required positive output from negative trigg...

Page 16: ...the beam linearly across the tube and return it to its starting point During the waiting period the 6AG7 tube V9 is held fully conducting since it has no bias and therefore its plate is about at ground potential When a trigger occurs the negative pulse from the multivibrator cuts the grid of V9 off very rapidly The plate therefore rises in exponential fashion at a rate depending upon R20D R20D1 9 ...

Page 17: ...st est sweeps C24 and C25 are shunted across them to transmit these frequencies VERTICAL DEFLECTION SYSTEM The vertical deflection system provides the means of attenuating or amplifying input signal amplitudes so that they may present a convenient image on the cath ode ray tube Signals may be attenuated as much as 8 times or amplified as much as 100 times without ap preciable change in shape Probe...

Page 18: ... PEAK VOLTS NOT RMS MULTIPLY RMS BY 2 828 TO CONVERT TO PEAK TO PEAK The calibrator waveform is derived from the line fre quency voltage of a 280 volt T1 secondary winding The positive peak is clipped limited by the diode connected section of a 12AT7 V16 1 The point of limit ing is determined by the setting of the CAL ADJ poten tiometer R75 4 Since the voltage across R75 4 is ob tained from the 22...

Page 19: ... and V26 is used This regulator oper ates in the same manner as the 225 supply using the regulated 225 as reference voltage Thus if the 225 is not set ats its correct value the 450 volt output will also be in error In order to provide the and 1500 volts neces sary to operate the CRT an oscillator type supply is used Since the input power to the oscillator comes from the regulated 225 volts its out...

Page 20: ......

Page 21: ...uld be checked for serious discoloration which would indicate excessive dissipation and there fore faulty operation A moderate amount of discolora tion is normal 3 Connections Loose screws or nuts should be tightened This is especially important when the screw serves as an electrical connection Corrosion of the chassis and electronic components is unlikely under normal conditions It should be remo...

Page 22: ...rol centered the HOR POSITION control clockwise the SWEEP STABILITY control counter clockwise and no vertical input signal measure the voltage between each CRT deflection plate and ground which should be within 60 volts The average potential of both horizontal X plates or both vertical Y plates should be within 40 volts of ground when measured under the above conditions Abnormal potential on the h...

Page 23: ...f V9 fig 21 is not If the sawtooth amplitude is low slow sweep speed V9 is known to be good and circuit volt ages appear normal remove V9 and measure the volt age at terminal 4 of V9 socket which should be between 5 and 30 volts This measurement is made with the SWEEP STABILITY control fully counter clockwise Error in sweep speed on one range only may be due to a defective timing capacitor C15A B ...

Page 24: ...ttenuator section If satisfactory waveshape cannot be obtained try another 6AG7 2 C39 C51 These electrolytic capacitors are em ployed in the low frequency compensating circuits and should be replaced if the range of R99 and R116 be comes insufficient to properly compensate the amplifier It is necessary that the actual capacity be within the limits specified in the Parts List section 3 R111 R111 1 ...

Page 25: ...NT Centered AVERAGE TUBE SOCKET VOLTAGES Measured at 117 volt line DC voltmeter sensitivity 20 000 ohms per volt Tube Pin To Voltage V1 1 2 Gnd 0 3 5 Gnd 15 5 4 Gnd 7 50 volt scale 6 Gnd 187 7 Gnd 6 5AC 8 Gnd 177 V2 1 2 Gnd 0 3 5 Gnd 10 TRIGGER AMPL clockwise 3 5 Gnd 0 TRIGGER AMPL counter clockwise 4 Gnd 0 TRIGGER AMPL clockwise 4 Gnd 20 TRIGGER AMPL counter clockwise 50 volt scale 6 Gnd 225 7 Gn...

Page 26: ...ise 8 Gnd 3 2 SWEEP STABILITY counter clockwise V10 3 Gnd 0 4 Gnd 6 5AC 5 Gnd 225 6 Gnd 65 SWEEP STABILITY clockwise 6 Gnd 3 2 SWEEP STABILITY counter clockwise 7 Gnd 70 SWEEP STABILITY clockwise 7 Gnd 16 SWEEP STABILITY counter clockwise V11 1 Gnd 156 MAGNIFIER POSITION out 1 Gnd 145 MAGNIFIER POSITION clockwise 2 Gnd 135 MAGNIFIER POSITION out 2 Gnd 110 MAGNIFIER POSITION clockwise 3 Gnd 0 4 Gnd...

Page 27: ... scale 6 Gnd 160 DEFLECTION POLARITY up 6 Gnd 195 DEFLECTION POLARITY center 6 Gnd 165 DEFLECTION POLARITY down 7 Gnd 0 8 Gnd 190 DEFLECTION POLARITY up 8 Gnd 150 DEFLECTION POLARITY center 8 Gnd 110 DEFLECTION POLARITY down V19 1 5 Gnd 32 DEFLECTION POLARITY up and center 1 5 Gnd 29 DEFLECTION POLARITY down 2 Gnd 6 5AC 3 Gnd 0 4 Gnd 23 DEFLECTION POLARITY up 50 volt scale 4 Gnd 20 DEFLECTION POLA...

Page 28: ...V22 pin 8 5 2AC 4 6 Gnd 280AC 8 Gnd 325 V23 2 V23 pin 8 5 2AC 4 6 Gnd 280AC 8 Gnd 325 V24 1 6 Gnd 335 3 V24 pin 4 6 5AC 4 7 Gnd 280AC V25 1 450 18 2 3 Gnd 450 4 V25 term 3 6 5AC 5 6 Gnd 680 V26 1 225 1 3 2 7 225 0 3 V26 pin 4 6 5AC 5 450 18 6 225 46 V27 1 4 225 38 2 5 Gnd 325 3 6 Gnd 225 7 Gnd 6 5AC 8 Gnd 0 V28 1 Gnd 87 2 7 Gnd 89 3 Gnd 0 4 Gnd 6 5AC 5 225 38 6 Gnd 137 V29 1 Gnd 89 4 Gnd 0 V30 2 G...

Page 29: ...Gnd 0 5 6 V2 pin 8 0 7 225 10K V4 1 Gnd 0 2 Gnd 0 3 Gnd 0 4 Gnd 75K 4 225 75K 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 9 5K V5 1 Gnd 0 2 Gnd 0 3 Gnd 0 4 Gnd 200K 4 Gnd 2 2M 5 Gnd 0 6 Gnd 10K 6 225 12K 7 Gnd 0 8 225 4 5K 8 V4 pin 4 80K V6 1 5 140 35M 2 3 7 Gnd 0 4 Gnd 0 V7 1 1 7 225 14 7K A B 2 140 65K 2 225 70K 3 4 5 Gnd 0 6 450 0 8 Gnd 47K V8 1 2 225 10K 3 Gnd 0 SWEEP SWEEP TRIGGER AMPL clockwis...

Page 30: ... 3 Gnd 0 4 Gnd 0 6 7 Gnd 0 1 V12 pin 5 180 2 7 140 1 IK 2 7 V14pin2 900 3 Gnd 0 4 Gnd 0 5 6 450 25K 1 Gnd 0 HOR POSITION clockwise 1 Gnd 90K HOR POSITION counter clockwise 2 7 140 11K 3 Gnd 0 4 Gnd 0 5 6 450 25K 1 450 0 2 3 450 2 4 450 0 5 450 0 6 450 240K to 480K depending on setting of R 42 6 450 0 with SWEEP RANGE set at 1 microsec 7 V9 pin 8 200K SWEEP SPEED MULT 1 0 7 V9 pin 8 2 2M SWEEP SPEE...

Page 31: ... access panel 0 14 V20 pin 1 2 V21 1 T1 term 7 0 2 3 7 T1 term 11 0 4 T1 term 10 0 6 T1 term 9 0 V22 2 T1 term 13 0 4 6 T1 term 14 0 8 225 IK V23 2 V22 pin 2 0 4 6 T1 term 16 0 8 V22 pin 8 0 V24 1 6 140 4 5K 3 T1 term 17 0 4 7 T1 term 16 0 V25 1 V25 pin 5 470K 2 3 T1 term 6 0 4 450 0 5 6 V21 pin 7 0 SIGNAL CALIBRATE switch in SIGNAL position SIGNAL CALIBRATE switch in 100 v position INPUT CHAN SEL...

Page 32: ...tting of R165 2 V32 1 3 4 5 6 7 8 Gnd 50M 2 V32 pin I 1 Cap V33 pin 3 0 V33 1 3 4 5 6 7 8 Gnd 1 3K 2 V33 pin 1 1 Cap Gnd 9M TRANSFORMER CONTINUITY T1 Measured with leads disconnected Terminals Ohms Resistance 20 C 1 to 3 1 7 2 to 4 1 7 5 to 6 3 7 to 8 147 8 to 9 150 10 to 11 27 12 to 13 03 14 to 15 10 8 15 to 16 10 9 16 to 17 21 18 to 19 025 20 to 21 6 1 22 to 23 42 24 to 25 25 T2 Measured with V3...

Page 33: ... in control settings of the 511 A under test 6 Line voltage variations DEFLECTION POLARITY SELECTOR WAVEFORMS Normal operation of this circuit for observation of pulses is shown in the following photographs The saw tooth pulse has a duration of 1 millisecond and a 60 cycle repetition rate Fig 2 Same pulse with DEFLECTION POLARITY switch in center position Note that position of the step is unchange...

Page 34: ...Amplitude 15 volts Fig 8 Waveform at V31 plate Amplitude 350 volts Fig 7 High voltage supply oscillator waveform at V31 grid Amplitude 75 volts SWEEP AND TRIGGER CIRCUIT WAVEFORMS Fig 10 Multivibrator waveform at V4 plate controls set for 10 µsec recurrent sweep Amplitude volts Fig 9 Multivibrator waveform at V4 grid with con trols set for 10 µsec recurrent sweep Amplitude 70 volts TYPE 511 A 511 ...

Page 35: ...e 45 volts Fig 15 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 16 GATE controls set for 10 µsec recurrent sweep Amplitude 45 volts Fig 18 Unblanking pulse at V7 cathode 10 µsec re current sweep Amplitude 65 volts Fig 17 Unblanking pulse at V7 cathode 1000 µsec recurrent sweep Amplitude 70 volts Fig 20 Waveform at V9 grid 10 µsec recurrent sweep Amplitude 50 volts Exposure m...

Page 36: ...et ting of SWEEP MAGNIFIER POSITION control Amplitude 30 volts Fig 24 Amplified sweep sawtooth at XI deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 26 1 µsec negative pulse at V1 grid from either video amplifier or TRIGGER INPUT Amplitude 5 volt Fig 25 Amplified sweep sawtooth at X2 deflection plate 10 µsec recurrent sweep Amplitude 200 volts Fig 27 The same pulse at V2 grid Nega...

Page 37: ...e square wave when low frequency compensation is insufficient also in dicating need for L F adjustment Fig 33 Response to 1 megacycle square wave showing overshoot due to excessive high frequency com pensation Readjustment is indicated Fig 34 Response to 1 megacycle square wave showing the effect of insufficient high frequency compen sation Fig 35 Normal response to 1 kilocycle square wave Fig 36 ...

Page 38: ...ly clipped sine wave at pins 2 6 and 7 of Calibrator Limiter V16 1 Amplitude ap proximately 300 volts depending upon line voltage Fig 37 2 Positively and negatively clipped sine wave at pin 3 of Calibrator Limiter V16 1 Ampli tude 100 volts as set by potentiometer R75 4 CAL ADJ TYPE 511 A 511 AD SECTION 4 PAGE 18 ...

Page 39: ...ERN The RC compensated attenuator used in the Type 511A is really two attenuators in parallel one a re sistive divider and the other a capacity divider The ratio of the resistive divider is maintained by the use of accurate resistors Since the stray capacities are not negligible compared to the values used in the capacity divider each divider incorporates a variable ceramic trimmer capacitor in on...

Page 40: ... electrolytic condensers it may be occasionally necessary to cor rect for a change in their capacity This is easily done by observing the response to a low frequency square wave 30 60 cycles and making the following adjust ments 1 With the INPUT CHAN SEL at 1 STAGE adjust R116 the rear LF ADJ so that the best waveshape is obtained 2 Move to the 2 STAGES position and adjust R99 the front LF ADJ BE ...

Page 41: ...Fig 41 Input Probe disassembled SECTION 4 PAGE 21 TYPE 511 A 511 AD ...

Page 42: ...Fig 42 Interior view right front side TYPE 511 A 511 AD SECTION 4 PAGE 22 ...

Page 43: ...Fig 43 Interior view left side SECTION 4 PAGE 23 TYPE 511 A 511 AD ...

Page 44: ...TYPE 511 A 511 AD SECTION 4 PAGE 24 ...

Page 45: ...Tf S 4 t C15C C15D ...

Page 46: ...R30 1 SECTION 4 PAGE 25 TYPE 511 A 511 AD ...

Page 47: ...1 1 Fig 46 Video Amplifier top C51 Fig 47 Video Amplifier bottom TYPE 511 A 511 AD SECTION 4 PAGE 26 ...

Page 48: ...SECTION 4 PAGE 27 TYPE 511 A 511 AD ...

Page 49: ...11 A 511 AD SECTION 4 PAGE 28 TOP VIEW OUT BOTTOM VIEW Fig 51 Vertical Attenuator bottom Fig 50 Vertical Attenuator top RI23 RI2O 2 RI20 I RI2O R119 1 RII9 Fig 52 Deflection Polarity Switch and Terminal Board ...

Page 50: ...SECTION 4 PAGE 29 TYPE 511 A 511 AD L24 ...

Page 51: ......

Page 52: ...0 400 WVDC C12 Fixed Mica or Cer 47 µµf 10 400 WVDC C13 Fixed PT 01 µf 20 600 WVDC C14A B Fixed EMC 2x20 µf 20 50 450 WVDC C15AA Fixed Mica or Cer 12 µµf 10 400 WVDC C15A Var Cer 7 45 µµf 500 WVDC C15B Fixed PT 920 µµf 1 Selected 400 WVDC 27 C15C Fixed PT 01 µf 1 Selected 400 WVDC 27 C15D Fixed PT 1 µf 1 Selected 400 WVDC 37 C15E Fixed PBT 1 µf 1 Selected 400 WVDC 2 55 C17 Fixed PT 1 µf 10 400 WVD...

Page 53: ...C C50 Fixed PT 1 µf 20 400 WVDC C51A B Fixed EMC 2x20 µf 10 450 WVDC 2 38 C52A B Fixed PBT 2x 05 µf 20 400 WVDC C53 Fixed PT 1 µf 20 400 WVDC C54 Fixed Cer 1000 µµf GMV 500 WVDC C55 1 Fixed PT 1 µf 20 400 WVDC C56 Fixed PT 1 µf 20 400 WVDC C58 Fixed PT 1 µf 20 2000 WVDC C59 Fixed PT 1 µf 20 2000 WVDC C60 Fixed PT 1 µf 20 400 WVDC C65 Fixed EMC 40 µf 2x20 20 50 450 WVDC C66 Fixed EMC 40 µf 2x20 20 ...

Page 54: ...p 1 watt 15 K 10 R15 Fixed Comp 1 2 watt 47 ohm 10 R16 Var Comp 1 4 watt 100 K 20 R17 Fixed Comp 1 2 watt 100 K 10 R18 Fixed Comp 1 2 watt 220 K 10 R19 Fixed Comp 1 2 watt 47 ohm 10 R20C Var Comp 2 watt 220 K 20 R20D Var Comp 2 watt 220 K 20 R20C D replacement furnished only with hand calibrated sweep speed dial 8 38 R20C1 to 9 Fixed Comp 1 2 watt 220 K 10 R20D1 to 9 Fixed Prec 1 2 watt 200 K 1 ea...

Page 55: ...1 2 watt 10 meg 10 R56 2 Fixed Comp 1 2 watt 22 meg 10 R57 Var Comp 1 4 watt 100 K 20 R58 Fixed Comp 1 2 watt 4 7 K 10 R59 Fixed WW 10 watt 25 K 5 Inductive R60 Fixed Comp 1 2 watt 180 ohm 10 R61 Fixed Comp 2 watt 4 7 K 10 R62 Fixed Comp 1 watt 1 2 K 10 R63 Fixed WW 10 watt 25 K 5 Inductive R64 Fixed Comp 1 2 watt 180 ohm 10 R65 Fixed Comp 1 2 watt 560 ohm 10 R66 Fixed Comp 1 2 watt 560 ohm 10 R67...

Page 56: ...220 K 10 R99 Var Comp 1 4 watt 500 K 20 R100 Fixed Comp 1 2 watt 220 K 10 R101 Fixed Comp 1 2 watt 10G ohm 10 R102 Fixed Prec 1 2 watt 1 meg 1 40 R103 Fixed Comp 1 2 watt 68 K 10 R104 Fixed Comp 2 watt 680 ohm 10 R105 Fixed WW 5 watt 2 K 5 R106 Fixed Comp 2 watt 820 ohm 10 R107 Var Como 1 4 watt 500 ohm 10 Limited Rotation R108 Fixed Comp 1 2 watt 150 ohm 10 R109 Fixed Comp 1 2 watt 1 meg 10 R110 ...

Page 57: ...ed Comp 1 2 watt 1 5 meg 10 R137 Fixed Comp 1 2 watt 1 0 meg 10 R138 Fixed Comp 1 2 watt 120 K 10 R139 Fixed Comp 2 watt 4 7 meg 10 R140 Var Comp 1 4 watt 2 meg 20 R141 Fixed Comp 1 2 watt 1 5 meg 10 R142 Var Comp 1 4 watt 500 K 20 R149 Fixed WW 25 watt 1 K 5 R150 Fixed Comp 1 2 watt 470 K 10 R151 Fixed Comp 1 2 watt 150 K 10 R152 Fixed Comp 1 2 watt 47 K 10 R153 Fixed Comp 1 watt 220 K 10 R154 Fi...

Page 58: ...170 V tapped at 25 V approx 2 KC Secondaries 280 0 280V 250 ma 260 0 260V 30 ma insulated for 700 VDC 5 V 4 A insulated for 500 VDC 6 3 V 6A insulated for 500 VDC 6 3V 6A insulated for 650 VDC 6 3 V 6A insulated for 350 V R M S 6 3 V 3A insulated for 250 VDC 6 3 V 6A insulated for 1500 VDC 6 3 V 11 A ground 35 4 V R M S ground 30 50 Secondaries 1250 V at 1 ma 1 4 V 2A connected to 1250 V winding 1...

Page 59: ...VR150 High Voltage Oscillator 6AQ5 High Voltage Rectifier 1B3GT 8016 High Voltage Rectifier 1B3GT 8016 MISCELLANEOUS A510 Binding Post Adapter 1 88 B24 Binding Post bakelite 49 B21 Binding Post ground 34 Fl15 Filter green plastic 90 FSB4 3 Fuse 4AG 3 amp slow blowing 15 GR511A Graticule clear plastic 1 50 GC510 Graticule cover 50 KNF22 Knob 11 16 10 KNS48 Knob 1 1 2 skirted 39 NG12 Nut graticule 0...

Page 60: ...SECTION VI DIAGRAMS See also additional informations and enlarged dia grams inside back cover TYPE 511 A 511 AD ...

Page 61: ......

Page 62: ...EXT BLOCK DIAGRAM OF TYPE 5IIA CATHODE RAY OSCILLOSCOPE 7 13 51 ...

Page 63: ......

Page 64: ...SWEEP MAGNIFIER SWEEP AMPLIFIER ...

Page 65: ......

Page 66: ...E 225V 140V 511A OSCILLOSCOPE TYPE VERTICAL AMPLIFIER TO SIA INY SYNC R76 2 X 13 2K AVERAGE SUPPLY CURRENT AT CHASSIS TERMINAL BLOCK 140V SUPPLY 0 6MA 225V SUPPLY 125 MA CAPACITOR ______ _ ____ ARE IN PICOFARADS lO FARADS VALUES LESS THAN I ARE IN MICROFARADS IO 6FARADS UNLESS OTHERWISE STATED R05 500K VW S 9 VI9 6AG7 NETWORK j IN AD s 2 MODELS 1600V jCSIA Tsmf V16 I I2AT7 1C39B R98 220K C45B RIO ...

Page 67: ......

Page 68: ...K NOTE 20 21 IN SERIAL NO 2867 8 ABOVE fr 6 6 3V II bi 3V TO S7 VIA TERMINAL STRIP 0068 RI7I 820K RI72 82OK TO 24 25 TI 0 I800V 0 I500V 6JV CRT FH_ O 600V 6 3V O 450V 0 2 25V O I40V O6 3V 0X10 CAL O S7 O AVERAGE CURRENT AT TERMINAL STRIP 225V SUPPLY I90MA 140V SUPPLY 28 MA POWER SUPPLY TYPE 511A CATHODE RAY OSCILLOSCOPE 6 20 5U ...

Page 69: ......

Page 70: ...eeded it may be re moved from the circuit by means of a rotary switch operated from the front panel ADJUSTMENT AND MAINTENANCE If the Vert Ampl Atten potentiometer R107 or the limiting resistor R108 are replaced it may be necessary to change the delay network shunt resistance so that the correct termination is maintained To check for proper termination set the sweep speed at 3 to 10 microseconds a...

Page 71: ... Ceramic 1 5 7 mmf 10 500 WVDC INDUCTORS L1 to L23 Fixed L24 Variable RESISTORS R1 Fixed Composition watt 270 ohm 10 R2 Fixed Composition watt Selected SWITCH S1 l AD 25 in out DPDT Rotary RELAY Type l D 25 Only RL1 l D 25 Type 227A DPDT 32VDC 1000 ohm NOTE L l TO L 12 INCLUSIVE ARE COAXIALLY WOUND ON THE SAME COIL FORM L I3TOL 23 ti TYPE 511 A 511 AD SECTION 7 PAGE 2 ...

Page 72: ... under this warranty is limited to the repair or replacement of the instrument or any part thereof fail ure of which is not due to abuse For service under this warranty promptly advise the factory of all details pertinent to the failure Replace ment parts will be shipped via air transportation upon request prepaid to any point within the continental United States or Canada Should it be more conven...

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