Campbell 21X Manuale dell'Operatore Scaricare il pdf (Pagina 89)

SECTION

8.

PROCESSING

AND

PROGRAM

CONTROL

EXAMPLES

TABLE

FFT

Power

SPectra

Results

and

1.25

Hz

Signal

Hz

0

0.214852

o.224618

o.234384

o.24415

0.253916

0.263682

o.273448

o.283214

1.22075

1.230516

1.240282

1.250048

1.259814

1.26958

1.279346

4.990426

FFT

PSi

1.0859

0

o.49212

84.'t52

811.01

980.79'

162.4

1.4764

0

0

3.9369

108.76

294.94"

108.76

3.9369

0

0

02:

P30

01:

0

02;

1025

03:

P30

01:

0

02:

1026

04:

P87

01:

0

02: 1024

05:

P48

01:

1025

O2:

1027

06:

P48

01:1026

02:

1028

07:

P37

01:

1028

02:

2

O3: 1028

Z=F

F

ZLoc:.

Z=F

F

ZLoc:

Beginning

of

Loop

Delay

Loop

Count

Z=SlN(X)

X Loc

ZLoc:

z=stN(x)

X

Loc

ZLoc:-

z=X-F

X

Loc

F

ZLoc:

Z=X+Y

X Loc

Y Loc

ZLoc:.

Z=X+F

X

Loc

F

ZLoc;

Z=X+F

X

Loc

F

ZLoc:.

End

22

23

24

25

26

27

28

29

125

126

127

128

129

130

131

511

Program:

The first

part

of this

program

qenerates

a

{ummy

data

set

that

represents

two

signats

supelimposed

on top

of

each

other.

One

signal

has a

frequency

of

1.25

Hz and a

ze.ro

to

peak

amptitt$e

of

1 while

the

other

signal

has

a

frequency

of .25

Hz

and

a

zero

to

peak

amplitude

ofl/.

Tne

data

simulates

a sampling

rate

of

l0

Hl or

a .1

sec

scan

rate.

l

This

prografi

generates

power

spectra

FFT

results

with

Out

bin

averaging-

Flag

Usage:

Flag

1

is automatically

set

once

the

inst.

havb

been

executed

once-

08:

01:

02|

03:

09:

01:

02:

03:

P33

1027

1028

1-

P34

1025

45

1025

01:

01:

01:

o2:

1

1

P91

11

o

Table

1

Programs

Sec.

Execution

lnterval

ll Flag

1 is

set

Go

to

end

of

Program

Table

The FFT

is

now

computed

and the

power

spectra

results

sent

to

Final

Storage.

10:

P34

01:1026

O2:.

I

03:

1026

11:

P95

12:

P60

01:

10

Q2:

1

03:

0

O4:.

1

05:

1

FFT

(OSX-2)

Log(base

2) of

SamPles

Power

Spectra/TaPer

Log(base

2) of

Bins

First

Sample

Loc

Multiplier

The

2nd

thrilugh

1|th

instructions

are

used

to

generate

adf, combine

the

1.25

and

0.25

Hz

signals

for the

FFT.

I

BIN

#

&13

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 190 191

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