Goldstar 7040A User Manual

1-1.

INTRODUCTION

1.

GENERAL INFORMATION

The Model many quality delayed sweep, and a

7040A

features:

shown

in

Figure

1-1,

is a

40

MHz dual-trace oscilloscope with

wide bandwidth, high sensitivity, dual timebases with

TV

sync separator. Moreover, the large CRT has an illumin-

ated internal graticule for parallax-free measurements and photographic applications.

1-2.

SPECIFICATIONS

Specifications for the Model

Vertical Amplifiers (Ch.l Bandwidth

DC

(-3

coupled

dB)

& 2)

7040A

Model

oscilloscope are given in Table

Table

7040A

1-1

SPECIFICATIONS

DC

to

40

MHz normal

DC

to 7

MHz

magnified

1-1.

AC

coupled

10

Hz to

10

Hz to 7

40

MHz normal

MHz

magnified

Risetime 8.8 nS normal

50

nS magnified

Deflection

Coefficients 5 m V / div to 5 V / div

in

10

calibrated steps of a 1-2-5 sequence. Continuously variable between steps, highest uncalibrated deflection

12.5

V /

div.

factor is at least

5 X magnifier adds 1 m V / div and 2 m V / div steps for frequencies up to 7

MHz.

Accuracy ± 3 %normal; ± 5 % magnified Input Impedance Approx. 1 megohm

300

Maximum Input Voltage

Input Coupling

V (DC + peak

500

V peak

AC,

DC,

or ground

AC

in

parallel with

AC)

below 1 kHz

30

pF

Signal

Delay

Permits viewing leading edge of displayed waveform

Channel 1 Output

Horizontal Amplifier

Only

at Horizontal Display A

Bandwidth

DC AC

(-

3 dB) coupled coupled

(X-Y

Phase Shift Deflection Coefficients Input Impedance Maximum Input Voltage

Timebase Generators

Mode)

20 m V / div into 50 ohms, 50

DC

to

500

kHz

10

Hz

to

500

kHz

Less than 3° at

50 kHz

Same as Vertical Amplifier

Hz

to 5 MHz

Display

Main

Modes

(A) Timebase Speeds

Delayed (B) Timebase Speeds

Magnifier

Accuracy Delay

Delayed

Time

Timebase Jitter

Main timebase only, Main timebase intensified, B timebase delayed, B timebase triggered

0.2

uS/

steps

div to 0.2 S/div in

of

a 1-2-5 sequence. Uncalibrated

19

calibrated

continuously-variable control extends deflection factor to at least

0.5

S/

div. Magnifier extends fastest sweep rate to 100

nS/div.

0.2

uS/

div

to

20

uS/

div in 7 calibrated steps of a fastest sweep rate to

10 X deflection increase at any time base

setting divides sweep rates of

ten. 0.2, 0.5;B range are uncalibrated.

± 3%

1-2-5 sequence. Magnifier extends

100

nSf div.

by

a factor

normal;

± 5% magnified

Continuously variable from less than 1 division to

10 divisions or more

1 part in

20,000

Triggering Sources

CHI,

CH2,

Line, External Coupling Trigger Modes Slope Hold off TV

Sync Polarity

Sensitivity (Inetrnal Trigger)

Sensitivity (External Trigger)

Sensitivity (TV-V) Input Impedance Maximum Input Voltage

AC, Auto,

HF Reject

Normal,

LF

Reject,

TV-V,

DC

TV-H

+ or -

Variable Negative 30

Hz

to 5 MHz :

5

MHz

to

40

30

Hz

to 5

MHz:

5

MHz

to 40

At

least 1 div or 1 megohm in parallel with approx. 30 pF 300

V (DC + peak

0.5

div

MHz:

MHz : 0.8

1.5

0.2V

l.OV

AC)

divs

V

Calibrator Output Voltage Frequency Waveform

Z-Axis

Input Signal

Bandwidth Coupling Input Impedance Maximum Input Voltage

Modulation

500

mV

p-p ± 3%

Approx. Square

Positive-going signal decreases intensity.

1000

wave

Hz

+5 V signal causes noticeable modulation

at normall intensity settings.

DC

to 2

MHz DC 25

k-ohms typical

30 V (DC

+ peak

AC)

CRT

Display Type Accelerating Potential Phosphor Graticule

Physical Size

& Environmental Data

(WXHXD)

Weight Temp.

Max.

Range for Rated Operation Ambient Operating Temp. Storage Temperature

Humidity Range for Rated Operation

Max.

Ambient Operating Humidity

6-inch square tube Approx. P31

Internal 1 high,

11.6 X 5.8 X 15

12

kV

standard

cm

square divisions. 8 divisions

10

divisions wide. Illuminated.

inches·

290 X 145 X 375mm

Approx.

+10°

0° to

-20° 45 35

to to

18.7

to

+35't +40't to

+70't

85% 85%

1bs (8.5 kg)

(50° to 95°F)

(32° to 104°F)

(-4°

to +158°F)

Power Requirements Line

Voltage

Line

Frequency

Power Consumption

Supplied Accessories Operater's Manual Direct/Low-capacitance Probes fuse AC

Power Cord

100, 120, 50

to

400

Approx.

1 2 1

1

220,

55

Hz

W

240

VAC ± 10%

(25OV

MAX)

,00-~--~-+--+--+--+--4--4-~--~

.b

....

FIGU

RE

2 -

1.

FRONT-PAN

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30

1IlL-_~32

ITEMS

0

~

GoldStor

WARNING

FIGURE 2 -

OSCILLOSCOPE

OS-7040A

Precision

CO.,Ltd.

I.IADE

IN

KOREA

POWER

C(JtSUWPTlON:

2.

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APPR025W

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2.

OPERATING INSTRUCTIONS

This section contains the information needed to operate the Model

utilize

it in a variety of basic and advanced measurement procedures. Included

are

the

identification and function of controls, connectors, and indicators,

7040A

startup procedures, basic operating routines, and selected measurement procedures.

2-1.

FUNCTION

OF CONTROLS, CONNECTORS,

AND

INDICATORS

Before turning this instrument on, familiarize yourself with the controls, conne,ctors, following

2-1-1

(1)

POWER

(2)

POWER

indicators, and other features described in this section. The

descriptions are keyed to the items called out in Figures 2-1 and 2-2.

Display

Item

and Power Blocks

switch lamp

Function

Push in to turn instrument power on and

Lights when power is on.

and i

off.

(3)

INTEN

(4)

FOCUS

(5)

ROTATION

(6)

ILLUM

(7)

Voltage

(8)

Power

control

Selector

Connector

Adjusts the brightness of the CRT display.

Clockwise rotation increases brightness. To obtain maximum trace sharpness. Allows screwdriver adjustment

of

trace

alignment with regard to the horizontal

of

the

graticule lines

CRT.

To adjust graticule illumination for photographing the CRT display.

Permits changing the operating voltage range.

of

the

Permits removal or replacement

AC

power cord.

2-1-2

Vertical Amplifier Block

CH1

(9)

(10) CH2

CH1

(11)

CH2

(12)

(13)

CH1

or X

IN

connector

or Y IN

AC/GND/DC switch

VOLTS/DIV switch

connector

For applying an input signal to verticalamplifier amplifier during

For applying an input signal to verticalamplifier channel

(vertical) amplifier during

To select the method of coupling the input

sigrial to the

AC

input connector and amplifier

DC

GND instead of the input connector, so a ground referecne can be established.

DC to its input connector, thus passing all signal components on

To select the method of coupling the input signal

To select the calibrated deflection factor of the input signal fed to the fier.

channell,

CH1

position inserts a capacitor between the

component

position connects the amplifier

position connects the amplifier directly

to

the

CH2

or to the x-axis (horizontal]

X-Y

operation.

2,

or to the Y-axis

X-Y

operation.

vertical amplifier.

to

block any

in

the input signal.

to

the amplifier.

vertical amplifier.

CH1

vertical

to

ground

ampli-

(14)

CH2

(15) (16)

(17) (18)

(19)

CH1

PULL

(19)

CH1

(on

VOLTS/DIV switch

VARIABLE

PULL

VARIABLE

( on

UNCAL

POSITION control

ADD

POSITION control)

X5

MAG

lamps

switch

controls

controls)

switchs

To select the calibrated deflection factor

fed

to

the

of the input signal vertical amplifier.

Provide continuously variable adjustment of deflection factor between steps of the /DIV switches. VOLTS/DIV calibrations are accurate only when the click-stopped

To increase the vertical amplifier sensitivity

by

5 times. The effective scale factor of the most sensitive position of the VOLTS/DIV thereby becomes 1 m V /

Indicate when the

ted out of their clickstops. For vertically positioning the

CRT

the

up,

trace trace down.

When pulled, the scope displays the algebraic sum of the

in

their fully clockwise position.

screen. Clockwise rotation moves the

counterclockwise rotation moves the

CH1

and

VARIABLE

div.

VARIABLE

CH2

VOLTS

controls are

controls are rota·

CH1

trace on

traces.

switch

(20)

CH2

POSITION control

PULL (on

CH2

POSITION control)

INV

switch

For vertically positioning the the

CRT

screen. Clockwise rotation moves

CH2

trace on

the trace upward, counterclockwise rotation moves the trace downward.

CH2

When pulled, the polarity of the

signal

is inverted.

(21) V

MODE

switch

(22) CHI OUTPUT connector

To

select the vertical-amplifier display

mode. CHI position displays only the channel 1

CRT

2.

screen.

The

CRT

beam is

input signal on the CH2

position displays only the channel 2

input signal on the AL

T position displays the input signals of both channels 1 and switched between channels at the end of each sweep to achieve this multi-channel display.

CHOP both channels 1 and switched between channels at a

position displays the input signals of

2.

The

CRT

beam is

250

kHz rate during the horizontal sweep to achieve this multi-channel display.

Provides amplified output of the channel 1 signal suitable for driving a frequency counter or other instrument.

Goldstar 7040A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual