Wavetek 132 Spezifikationen PDF herunterladen (Seite 101)

(1)

lOOß

resistor

(1)

10

uf

capacitor

(1)

.1

uf

capacitor

(1)

.047

uf

capacitor

(1)

.0033

uf

capacitor

Parti:

Frequency-Division

Multiplexing

a)

Turn

on

the

power

to

the

HP8590B

and

the

HP8656B

systems.

Press

RF

OFF

to

ensure

the

RF

is

off.

Using

the

oscilloscope,

configure

one

Wavetek

186

to

produce

a

200

mV

peak-to-peak

(pp),

300

kHz

sine

wave.

This

signal

will

be

referred

to

as

f

t

.

Configure

the

second

Wavetek

186

to

produce

a

200

mV

pp,

400

kHz

sine

wave.

This

signal

will

be

referred

to

as

f

2

.

Configure

both

Wavetek

132's

to

produce

5

V

pp,

10

kHz

sine

waves.

These

will

be

referred

to

as

f

ml

and

f^.

f

m

i

=

fna=10

kHz,

fi

=

300

kHz,

f

2

=

400

kHz.

b)

Connect

f

m

i

to

VCA

IN

on

the

appropriate

Wavetek

186

to

modulate

it

with

fi.

Apply

the

Wavetek

186

output

to

the

input

of

the

spectrum

analyzer.

Follow

the

directions

below

to

measure

the

spectrum

of

the

AM

wave

on

the

spectrum

analyzer:

1)

There

will

be

a

spike

on

the

far

left

of

the

screen.

Press

AMP

and

rotate

the

knob

so

the

amplitude

of

the

signal

is

touching

the

top

of

the

graticule.

2)

Press

FREQ

and

rotate

the

knob

so

the

large

center

spike

is

at

the

center

of

the

screen.

3)

Press

SPAN

and

rotate

the

knob

so

the

span

of

the

display

decreases.

When

the

spike

goes

off

the

screen,

repeat

step

two.

Keep

decreasing

the

span

in

this

manner

until

you

are

able

to

see

the

right

side

spectrum

of

the

carrier

frequency

and

its

side

Lab

4

Page

2

91

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 134 135

Kommentare zu diesen Handbüchern

Keine Kommentare