To Next Page

To Previous Page

Fig.

12.

RELATIVE

MEASUREMENTS

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.

Unknown 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

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.

The vertical calibration coefficient is now the reference

signal's

amplitude (in volts) divided by the

product

of the

vertical amplitude set in step 1 and the

VOLTS/DIV

setting.

Using the formula:

Vertical coefficient

Voltage of the reference signal (V)

Vertical amplitude (div) x

VOLTS/DIV

setting

Remove the reference signal and apply the unknown

sig-

nal to the

INPUT

jack, using the

VOLTS/DIV

control

adjust the display for

easy

observation. Measure the am-

plitude

of the displayed waveform and use the

follow-

ing relationship to calculate the actual amplitude of the

unknown waveform.

Using the formula:

Amplitude of the unknown signal (V)

Vertical distance (div) x Vertical coefficient

VOLTS/DIV

setting

[EXAMPLE]

For

the example, the

VOLTS/DIV

is 1 V/div.

The

reference signal is 2 Vrms. Using the

VARIABLE,

ad-

just so

that

the amplitude of the reference signal is 4 divi-

sions.

(See Fig. 41)

Substituting the given value:

. . 2 Vrms

Vertical coefficient =

4 (div) x

(V/div)

0.5

Then

measure the unknown signal and

VOLTS/DIV

is 5 V

and vertical amplitude is 3 divisions.

Substituting the given value:

Effective

value of unknown signal = 3 (div) x 0.5 x 5(V/div)

7.5 V rms

• Period

Setting the relative sweep coefficient

with

respect to a refer-

ence

frequency signal.

Procedure:

Apply the reference signal to the

INPUT

jack, using the

VOLTS/DIV

and

VARIABLE

obtain

an easily observed

waveform display.

Using the

SWEEP

TIME/DIV

and

VARIABLE

adjust one

cycle

of the reference signal to occupy a fixed number

scale

divisions accurately. After this is done be sure

not to disturb the setting of the

VARIABLE

control.

Reference

signal

Adjusted reference signal

Fig.

Brand	Kenwood
Model	CS-5130
Category	Test Equipment
Language	English

Kenwood CS-5130 User Manual

Table of Contents

Questions and Answers:

Kenwood CS-5130 Specifications

Related product manuals