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PHASE

DIFFERENCE

MEASUREMENTS

This

procedure is useful in measuring the phase difference

of signals of the same frequency.

Procedure:

Apply the two signals to the CH1 and CH2

INPUT

jacks,

setting the vertical MODE to either

CHOP

or ALT mode.

Set the

SOURCE

to the signal which is leading in phase

and use the

VOLTS/DIV

to adjust the signals such that

they are equal in amplitude. Adjust the other controls for

normal display.

Use the

SWEEP

TIME/DIV

and

SWEEP

VARIABLE

to ad-

just the display such that one cycle of the signals oc-

cupies

8 divisions of horizontal display.

Use

the *

POSITION

to bring the signals in the center

of the

screen.

Having set up the display as above, one division now

represents

45° in phase.

Measure the horizontal distance between corresponding

points on the two waveforms.

Using

the formula:

Phase

difference = Horizontal distance (div) x 45°/div

[EXAMPLE]

For

the example, the horizontal distance is 1.7 divisions.

(See

Fig. 26)

Substituting the given value:

The

phase difference = 1.7 (div)x45°/div= 76.5°

The

above setup allows 45° per division but if more ac-

curacy

is required the

SWEEP

TIME/DIV

may be changed

and magnified

without

touching the

VARIABLE

control and

if necessary the trigger level can be readjusted.

In this

case,

the phase difference can be obtained

from

the

SWEEP

TIME/DIV

setting for 8 divisions/cycle and the new

SWEEP

TIME/DIV

setting changed for higher accuracy, by

useing

the

following

formula.

Phase

difference = Horizontal distance of new sweep range

(div)x45°/div

New

SWEEP

TIME/DIV

setting

Original

SWEEP

TIME/DIV

setting

Another simple method of obtaining more accuracy quick-

ly is to simply use x 10 MAG for a

scale

of 4.5°/div.

One

cycle adjusted to occupy 8 div.

RELATIVE

MEASUREMENT

If the frequency and amplitude of some reference signal are

known, an unknown signal may be measured for level and

frequency

without

use of the

VOLTS/DIV

SWEEP

TIME/DIV

for calibration.

The

measurement is made in units relative to the reference

signal.

• Vertical Sensitivity

Setting the relative vertical sensitivity using a reference

signal.

Procedure:

Apply the reference signal to the

INPUT

jack and adjust

the display for a normal waveform display.

Adjust the

VOLTS/DIV

and

VARIABLE

so that the signal

coincides

with

the CRT

face's

graduation lines. After ad-

justing, be sure not to disturb the setting of the

VARIA-

BLE

control.

Phase

difference

cycle

Reference

signal.

Comparison

signal

Phase

difference

Fig.

Phase

difference

Expanded

sweep waveform display.

Fig.

Brand	Kenwood
Model	CS-5165
Category	Test Equipment
Language	English

Kenwood CS-5165 User Manual

Table of Contents

Questions and Answers:

Kenwood CS-5165 Specifications

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