manuais SRS Labs Lock-In Amplifier

Srs labs Lock-In Amplifier Manual do Utilizador (82 páginas)

Marca: Srs-labs | Categoria: Medição, teste e controlo | Tamanho: 1.05 MB |

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Índice

MODEL SR530

1

Table of Contents

3

SR530 Specification Summary

7

Front Panel Summary

9

Abridged Command List

11

Status Byte Definition

12

SR510 Guide to Operation

13

Front Panel

13

Dynamic Reserve

14

Display Select

14

Channel 1 Display

14

Output Channel 1

15

Rel Channel 1

15

Offset Channel 1

15

R Output

15

Expand Channel 1

16

X (RCOSØ) Output

16

Channel 2 Display

16

Ø Output

16

Output Channel 2

17

Rel Channel 2

17

Auto Phase

17

Offset Channel 2

17

Expand Channel 2

18

Y (RSINØ) Output

18

Reference Input

18

Trigger Level

18

Reference Mode

19

Reference Display

19

Phase Controls

19

Time Constant

19

Noise Measurements

19

Local and Remote

20

Defaults

20

SR530 Guide to Operation

21

Rear Panel

21

SR530 Guide to

23

Programming

23

RS232 Echo and No Echo

24

Operation

24

SR530 Command List

25

Status Byte

28

Trouble-Shooting Interface

29

Problems

29

The SR530 with the RS232

30

Interface

30

The SR530 with the GPIB

30

GPIB with RS232 Echo Mode

31

The Lock-in Technique

32

A Measurement Example

32

Shielding and Ground Loops

33

SR530 Block Diagram

36

The Signal Channel

37

Reference Channel

37

Phase Sensitive Detectors

37

DC Amplifiers and System Gain

37

A Microprocessor Based Design

37

Circuit Description

38

Reference Oscillator

39

Demodulator and Low Pass

39

Amplifier

39

RS232 Interface

41

GPIB Interface

41

Power Supplies

41

Internal Oscillator

41

Calibration and Repair

42

Notch Filters

43

Appendix A:

44

Noise Sources and Cures

44

Appendix B:

47

Introduction to the RS232

47

Stop Bits

48

Voltage Levels

48

Final Tip

48

Appendix C:

49

Introduction to the GPIB

49

Appendix D:

50

Program Examples

50

Program Example 1:

50

IBM PC, Basic, via RS232

50

Program Example 2:

51

IBM PC, Microsoft Fortran

51

Program Example 3:

53

IBM PC, Microsoft C v3.0

53

Program Example 4:

55

IBM PC,Microsoft Basic

55

Program Example 5:

57

HP85 via GPIB

57

Documentation

58

SR530 COMPONENT PARTS LIST

59

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