Wavetek 132 Spezifikationen PDF herunterladen (Seite 47)

Change

the

sample

rate

to

5000

Hz.

Q:

Calculate

the

first

four

harmonic's

amplitude

and

frequencies

for

the

sample

pulse

and

the

sampled

output

(f

s

=

5000

Hz

and

f

m

=

1000

Hz).

g)

Turn

off

all

power.

Construct

the

LPF

circuit

of

Figure

2

on

the

same

breadboard.

Connect

the

output

(pin

6

on

op

amp

2)

to

channel

D.

Connect

the

output

of

the

sample

and

hold

to

the

input

of

the

LPF

(

pin

3

on

op

amp

1).

Turn

the

power

on.

Set

the

sample

pulse

at

a

frequency

of

5

kHz.

The

LPF

output

should

look

like

a

filtered

version

of

the

input.

Rf

Rf

V

V

V

V

V

V

+

15V

+

15V

-15V

-15

V

C2

~

7

7

2

4

R3

2

4

LM301

\&

-AAA,

3

LM301

^\°

K.1

R2

3

VV]

Output

■

'VV^VV

^1^*

^

1

NC

^<"1

5

1

NC

(Channel

D)

Cl

~

l^

8

H^

C3

l^

8

H^

-=-

30

pf

-±-

30

pf

Input

(Chan

ine]

C)

Figure

2

Lowpass

Butterworth

Filter

R

1

=

R

2

=

R

3

=

1

6

K

Q,

Rf=32KQ,

C

x

=

.005

nf,

C

2

=

.

02uf,

C

3

=

.01uf

h)

Plot

the

spectrum

of

all

4

channels

using

the

RAPIDS

spectrum

analyzer.

Make

sure

Lab

2

Page

4

37

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