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Count the number of

cycles

of waveform between a

chosen

set of vertical graduation lines.

Using

the horizontal distance between the vertical lines

used

above and the

SWEEP

TIME/DIV, the

time

span

may

be calculated.

Multiply

the reciprocal of this value

by the number of

cycles

present in the given

time

span.

If "x 10 MAG" is used multiply this further by 10.

Note

that

errors will occur for displays having only a few

cycles.

Using

the formula:

# of

cycles

x " x 10 MAG" value

Freq=

Horizontal distance (div) x

SWEEP

TIME/DIV setting

Count

cycles

between

this

portion

[EXAMPLE]

For

the example, within 7 divisions there are 10

cycles.

The

SWEEP

TIME/DIV is 5 jis. (See Fig. 21)

Substituting the given value:

Freq= —

=285.7

kHz

7 (div) x 5 {(is)

PULSE WIDTH MEASUREMENTS

Procedure:

Apply the pulse signal to the INPUT jack. Set the vertical

MODE to the channel to be

used.

Use the VOLTS/DIV, VARIABLE and w POSITION to ad-

just

the waveform

such

that

the pulse is easily observed

and

such

that

the center pulse

width

coincides

with

the

center horizontal line on the CRT

screen.

Measure the distance between the intersection of the

pulse

waveform and the center horizontal line in divi-

sions.

Be sure

that

the VARIABLE control is in the CAL.

Multiply

this distance by the

SWEEP

TIME/DIV and by

1/10 is "x 10 MAG" mode is being

used.

Using

the formula:

Pulse

width

= Horizontal distance (div) x

(SWEEP

TIME/DIV

setting) x " x MAG 10"value"

(1/10)

Adjust

the

vertical

scale

with

POSITION

[EXAMPLE]

For

the example, the distance

(width)

at the center horizon-

tal line is 4.6 divisions and the

SWEEP

TIME/DIV is 0.2 ms.

(See

Fig. 22)

Substituting the given value:

Pulse

width

= 4.6 (div) x 0.2 ms = 0.92 ms

PULSE RISETIME AND FALLTIME MEASUREMENTS

For

risetime and

falltime

measurements, the 10% and

90% amplitude points are used as starting and ending

reference points.

Procedure:

Apply a signal to the INPUT jack. Set the vertical MODE

to the channel to be

used.

Use

the VOLTS/DIV and VARIABLE to adjust the

waveform peak-to-peak height to six divisions.

Using the • POSITION control and the other controls,

adjust

the display

such

that

the waveform is centered

vertically in the display. Set the

SWEEP

TIME/DIV to as

fast a setting as possible consistent

with

observation of

both the 10% and 90% points. Set the

VARIABLE

con-

trol

to CAL position.

Use the POSITION control to adjust the 10% point

to coincide

with

a vertical graduation line and measure

the distance in divisions between the 10% and 90%

points on the waveform.

Multiply

this by the

SWEEP

TIME/DIV and also by 1/10, if "x 10 MAG" mode was

used.

NOTE:

sure

that

the correct 10% and 90% lines are

used.

For

such

measurements the 0, 10, 90 and 100% points are

marked on the CRT

screen.

Using

the formula:

Risetime

= Horizontal distance (div) x

(SWEEP

TIME/DIV

setting) x " x 10 MAG" value"

(1/10)

Pulse

length

(at

50%)

Align the waveform

with

the

center

using

POSITION

Fig.

Brand	Kenwood
Model	CS-1065
Category	Test Equipment
Language	English

Kenwood CS-1065 User Manual

Table of Contents

Questions and Answers:

Kenwood CS-1065 Specifications

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