Epson 2500 Instrukcja Użytkownika Pobierz pdf (Strona 78)

72 Scanning

7. Choose your Image Type:

■

Select

Color Photo

to scan a color photograph in

24-bit color.

■

Select

Color Photo De-screening

to remove moiré

patterns from a halftone picture (for example, from a

photo in a magazine).

■

Select

Black & White Photo

to scan a photo in gray

tones.

■ Select Line Art to scan your image in black and white

without shading.

■ Select OCR to scan text.

■

Select

Copy & Fax

to scan a document combining text

and graphics in black and white at draft quality.

8. Choose the Destination:

Printer (Photo)

,

Screen/Web

,

Fax, OCR, Printer (Fine), or Laser Printer. For the

highest quality photo prints, choose

Printer (Photo)

.

9. Click the Preview icon to preview your image. To

make further adjustments, see the next section and

“Scanning Part of an Image” on page 75.

Making Changes to Your Scan

You can adjust the quality and size of your scan or make

corrections to the color, tone, contrast, and highlights.

1. To change the size of your final image, type new values in

the

Source and Target boxes, or drag the Scale slider.

(The percentage of reduction or enlargement is shown to

the right of the slider.)

2. Choose the resolution for scanning:

■ Choose 300 dpi for photos you plan to print (or 72 dpi

to view them only on your computer or the Web).

■ Choose 400 dpi for most text scanning.

■ Choose a higher resolution for line drawings, or if you

plan to enlarge a photo.

note:

Higher resolutions

create larger files that

take longer to print

and process.

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Agilent technologies 22A Specifications (26 pages)

Brand: Agilent-technologies | Category: Measuring, testing & control | Size: 0.53 MB |

English

Table of contents

Agilent 34980A

1

Flexible switching, measure

2

Optimized for test systems

2

Measurements you can trust

3

Standard interfaces take the

4

Comments

6

4 current channels

6

34980A multiplexer switch

7

34980A matrix switch modules

10

34980A general-purpose switch

12

101 102COM

13

201 202COM

13

10 uV 10 uV N/A N/A

14

34945A/34945EXT microwave

15

34980A system control modules

16

D/A converter with wave

17

34951A 4-channel isolated

17

34952A multifunction module

18

34959A breadboard module

19

Selectable on 100 Ω, 1k Ω

22

System specifications

23

Ordering information

24

Related Agilent literature

25

Agilent Email Updates

26

Agilent technologies 22A Specifications (120 pages)

Brand: Agilent-technologies | Category: Measuring, testing & control | Size: 8.50 MB |

English

Table of contents

Spectrum Analysis Basics

1

Table of Contents

2

— continued

3

Chapter 1

4

Introduction

4

What is a spectrum?

5

Why measure spectra?

6

Types of measurements

8

Types of signal analyzers

8

Chapter 2

10

Spectrum Analyzer

10

Fundamentals

10

Accuracy.”

11

RF attenuator

12

Tuning the analyzer

12

IF gain

16

Resolving signals

16

H(4000) = –10(4) log

18

Residual FM

19

Phase noise

20

Sweep time

22

Digital resolution filters

23

Envelope detector

24

Displays

25

Detector types

26

Positive peak

27

Negative peak

27

One bucket

27

(positive) detection

28

Peak (positive) detection

29

Negative peak detection

29

Normal detection

29

1Buckets 2 3 4 5678910

31

Average detection

32

Averaging processes

33

Video filtering

34

Trace Averaging

36

Time gating

38

RF signal

40

Gate signal

40

Gated FFT

42

Gated video

42

Gated sweep

43

Chapter 3

44

Digital IF Overview

44

The all-digital IF

45

Custom signal processing IC

47

Frequency counting

47

Chapter 4

49

Amplitude and

49

Frequency Accuracy

49

Frequency response

51

Relative uncertainty

52

Absolute amplitude accuracy

52

Improving overall uncertainty

53

The digital IF section

54

Examples

55

Frequency accuracy

56

Chapter 5

58

Sensitivity and Noise

58

Noise figure

61

Preamplifiers

62

Spectrum analyzer

63

–10 –5 0 +5 +10

64

Noise as a signal

65

1% (±0.044 dB)

67

Dynamic Range

70

Chapter 6

70

Attenuator test

74

2nd order

78

Gain compression

80

Chapter 7

83

Extending the

83

Frequency Range

83

Image frequencies

86

4.7 4.9 5.1 5.3

88

Preselector

90

Amplitude calibration

91

Improved dynamic range

92

External harmonic mixing

96

Signal identification

98

Figure 7-17a. 14

100

Chapter 8

102

Modern Spectrum Analyzers

102

Figure 8-1. CCDF measurement

103

Digital modulation analysis

105

Saving and printing data

106

Firmware updates

108

Glossary of Terms

110

Agilent Email Updates

120

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