National-instruments 6023E Manuel d'utilisateur Page 22
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- MARQUE LIVRES
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Chapter 3 Hardware Overview
© National Instruments Corporation 3-3 6023E/6024E/6025E User Manual
For diagrams showing the signal paths of the three configurations, refer to
the Analog Input Signal Overview section in Chapter 4, Signal
Connections.
Input Range
The devices have a bipolar input range that changes with the programmed
gain. You can program each channel with a unique gain of 0.5, 1.0, 10, or
100 to maximize the 12-bit analog-to-digital converter (ADC) resolution.
With the proper gain setting, you can use the full resolution of the ADC to
measure the input signal. Table 3-2 shows the input range and precision
according to the gain used.
Table 3-1.
Available Input Configurations
Configuration Description
DIFF A channel configured in DIFF mode uses two analog
input lines. One line connects to the positive input of
the programmable gain instrumentation amplifier
(PGIA) of the device, and the other connects to the
negative input of the PGIA.
RSE A channel configured in RSE mode uses one analog
input line, which connects to the positive input of the
PGIA. The negative input of the PGIA is internally
tied to analog input ground (AIGND).
NRSE A channel configured in NRSE mode uses one
analog input line, which connects to the positive
input of the PGIA. The negative input of the PGIA
connects to analog input sense (AISENSE).
Table 3-2.
Measurement Precision
Gain Input Range Precision
1
0.5 –10 to +10 V 4.88 mV
1.0 –5to+5V 2.44 mV
10.0 –500 to +500 mV 244.14 µV
100.0 –50 to +50 mV 24.41 µV
1
The value of 1 LSB of the 12-bit ADC; that is, the voltage increment corresponding to a
change of one count in the ADC 12-bit count.
Note: See Appendix A, Specifications, for absolute maximum ratings.
- 6023E/6024E/6025E 1
- User Manual 1
- Important Information 3
- Contents 4
- Chapter 4 5
- About This Manual 9
- Related Documentation 10
- Introduction 11
- Using PXI with CompactPCI 12
- What You Need to Get Started 12
- Software Programming Choices 13
- NI-DAQ Driver Software 14
- Optional Equipment 15
- Chapter 1 Introduction 16
- Software Installation 17
- Unpacking 17
- Hardware Installation 18
- Hardware Configuration 19
- PCI-6025E, and PXI-6025E 20
- Analog Input 21
- Input Range 22
- Dithering 23
- Figure 3-3 24
- Analog Output 25
- Digital I/O 26
- Timing Signal Routing 26
- Programmable Function Inputs 27
- Device and RTSI Clocks 28
- RTSI Triggers 28
- Chapter 3 Hardware Overview 29
- Table 3-3 30
- Signal Connections 31
- Chapter 4 Signal Connections 32
- 6024E, and 6025E 34
- Table 4-3. I/O Signal Summary 37
- Analog Input Signal Overview 38
- Floating Signal Sources 39
- Analog Input Modes 39
- Signal Sources 44
- Sources (RSE Configuration) 48
- Sources (NRSE Configuration) 48
- Figure 4-8 49
- All Devices 50
- Port C Pin Assignments 53
- Power-up State 54
- Timing Specifications 55
- Mode 1 Input Timing 57
- Mode 1 Output Timing 58
- Mode 2 Bidirectional Timing 59
- Power Connections 60
- Timing Connections 60
- DAQ Timing Connections 62
- SCANCLK Signal 63
- EXTSTROBE* Signal 63
- TRIG1 Signal 64
- = 50-100 ns 65
- STARTSCAN Signal 66
- Figure 4-25 67
- STARTSCAN Input Signal Timing 67
- Figure 4-26 67
- = 10 ns minimum 68
- AIGATE Signal 69
- SISOURCE Signal 70
- WFTRIG Signal 70
- UPDATE* Signal 71
- UISOURCE Signal 72
- GPCTR0_SOURCE Signal 73
- GPCTR0_GATE Signal 74
- GPCTR0_OUT Signal 75
- GPCTR0_UP_DOWN Signal 75
- GPCTR1_SOURCE Signal 76
- GPCTR1_GATE Signal 76
- GPCTR1_OUT Signal 77
- GPCTR1_UP_DOWN Signal 77
- Field Wiring Considerations 79
- Calibration 80
- Self-Calibration 81
- External Calibration 81
- Other Considerations 82
- Specifications 83
- Accuracy Information 84
- Transfer Characteristics 85
- Amplifier Characteristics 85
- Output Characteristics 86
- Dynamic Characteristics 86
- Stability 86
- Voltage Output 88
- DIO<0..7> 89
- Timing I/O 90
- Operating Environment 92
- Storage Environment 92
- PCMCIA Bus 93
- Triggers 99
- Digital Trigger 99
- Power Requirement 99
- Physical 100
- Environment 100
- Custom Cabling and Optional 101
- Connectors 101
- Optional Connectors 102
- Figure B-1 103
- Common Questions 107
- Analog Input and Output 108
- Timing and Digital I/O 109
- Select_Signal 110
- Appendix C Common Questions 111
- Technical Support Resources 112
- Worldwide Support 113
- Glossary 114
- See also breakdown voltage 126
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