Philips PM 5101 - Page 18

Philips PM 5101

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18

-

Check

that

the

output

amplitude

is 4 V p _

p.

- Set

SK3

to

po

sition

"'.

- Check the calibration

of

attenuator

R2

at

a frequency

of

1 kHz.

- Check the

amp

litude re

spo

nse

of

the

output

si

gna

l

at

10, 30

and

JOO

Hz

(SK2

in

pos

ition X

l)

and

at

JO,

30

and

JOO

kHz

(SK2 in

position

X

lK).

Tolerance:

::;

1%

of

the

output

amp

litude

at

1

kHz

.

E.

SQUARE

WAVE VOLTAGE

- Set

SK3

to position

'L

.

- Check

that

the

mark

/space

ratio

at

2

kHz

is 1: l (see Fig. 4).

If

necessary, adjust with R20.

- Set

attenuator

R2 to position 2.0 V.

- Check

that

the

output

voltage is 4 V

p

_

± 5%.

p

- Check

that

the

sag

at

50

Hz

and

4 V

p

_

is

::;

10

mY.

p

z

x : y = mark/space ratio

z = sag

PEM

1515

E 1

320

Fig. 4. Square wave vo/tage shape

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