Wavetek 132 Spezifikationen PDF herunterladen (Seite 11)

I.

INTRODUCTION

This

document

contains

the

development

notes

and

results

for

a

set

of

five

laboratories

designed

to

provide

a

working

knowledge

of

the

subjects

covered

in

an

introductory

communications

analysis

course.

Each

appendix

contains

a

laboratory

document

that

will

guide

the

student

in

the

completion

of

each

experiment,

a

data

sheet

to

accompany

each

lab,

a

solution

guide

and

an

equipment

sheet.

Each

laboratory

document

references

the

data

sheet

by

bold

face

Qs

indicating

questions

that

should

be

answered

on

the

data

sheet.

This

will

ensure

that

all

pertinent

information

required

for

a

formal

lab

write

up

will

be

addressed.

Laboratory

1

provides

an

introduction

to

circuit

construction

and

laboratory

equipment.

This

laboratory

is

designed

for

the

student

who

has

never

assembled

a

circuit

in

the

lab.

A

summer

is

built

using

a

/xA741

operational

amplifier.

The

RAPIDS

computer

system

is

introduced,

as

well

as

the

Tektronix

2445B

oscilloscope.

The

RAPIDS

system

is

a

system

with

which

most

students

are

not

familiar

and

is

required

for

Laboratories

1,

2,

and

3.

Using

the

RAPIDS

system,

signals

are

viewed

in

the

time

and

frequency

domains

and

compared

to

theoretical

predictions.

It

is

also

a

prelude

to

Laboratory

3

which

utilizes

the

same

circuit.

Laboratory

2

covers

sampling,

recovery

and

analog-to-digital

conversion.

The

concepts

of

natural

sampling

and

Nyquist

rate

are

demonstrated

through

the

use

of

a

LF198A

sample

and

hold

integrated

circuit.

Spectral

analysis

is

performed

on

each

signal.

To

recover

the

signal,

the

sampled

signal

is

passed

through

a

low

pass

filter

(LPF)

built

by

the

student.

The

signal

is

also

quantized

and

encoded

using

a

printed

circuit

board

designed

for

lab

use

in

the

course

EC2220.

Laboratory

3

is

an

exercise

in

amplitude

and

frequency

modulation.

Amplitude

modulated

(AM)

signals

are

generated

via

laboratory

equipment

and

their

spectra

analyzed.

The

message

signal

is

detected

through

an

envelope

detector

and

compared

to

1

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