Philips PM 5101 - Adjusting the Output Voltage; Sinusoidal Voltage; Square Wave Voltage

Philips PM 5101

28 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

10

C.

ADJUSTING

TH

E

OUTPU

T

VOL

T

AGE

1. Sinusoidal voltage

Set switch

"

~/

'U

" (SK3)

to

position

"~

"

.

The

output

voltage

at

sockets

BUI-BU2

can

be adjusted

with

knob

"AMPLITUDE

" (R2) between

approximately

3 mY

rms

and

2 Y

rm

s

(unioaded).

2. Square wave voltage

Set switch

"

~/

'U

" (SK3) to

position"

'U

" .

The

output

voltage

at

sockets

BU1-BU2

can

be adjusted witll

knob

"AMPLITUDE

" (R2) between

approximately

6 mY

p

_

p

and

4V

p

-

p

(unioaded).

The

output

voltage

consists

of

a

square

wave voltage which

is

superimposed

on

a negative

d.c. voltage, equal to

half

the

amplitude

of

the s

quare

wave voltage.

To

obtain

a

square

wave voltage which

is

symmetrical

with

respect to the

zero line, a circuit s

hould

be used for

changing

the d.c. voltage level (in

this case, a capacitor).

The

value

of

this

capacitor

depends

entirely

on

the

input

impedance

of

the

circuit to be fed

and

on the frequency.

For

this

reason no

capacitor

has been fitted in the

apparatus.

Note:

When

using

the sinusoidal

or

the

square

wave voltage, it

is

recommended

that

the

output

voltage

of

the

generator

is

measured

with a

voltmeter

with

a

high

input

impedance

for

obtaining

accurate

measurements.

By

doing

so,

the

exact

value

of

the voltage which

is

applied

to

the circuit connected

will be

known.

Table of Contents