National-instruments 6023E Manuel d'utilisateur Page 108
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Appendix C Common Questions
6023E/6024E/6025E User Manual C-2 ni.com
Installation and Configuration
How do I set the base address for my device?
The base address of your device is assigned automatically through the
PCI/PXI bus protocol. This assignment is completely transparent to you.
What jumpers should I be aware of when configuring my E Series
device?
The E Series devices are jumperless and switchless.
Which National Instruments document should I read first to get
started using DAQ software?
Your NI-DAQ or application software release notes documentation is
always the best starting place.
What version of NI-DAQ must I have to use my 6023E/6024E/6025E?
Yo u m u st h av e NI-DAQ for PC Compatibles version 6.5 or higher to use a
PCI a PXI device. To use the DAQCard-6024E you must have NI-DAQ for
PC compatibles version 6.9 or higher.
Analog Input and Output
I’m using my device in differential analog input mode and I have
connected a differential input signal, but my readings are random and
drift rapidly. What’swrong?
Check your ground-reference connections. Your signal can be referenced to
a level that is considered floating with reference to the device ground
reference. Even if you are in differential mode, you must still reference the
signal to the same ground level as the board reference. There are various
methods of achieving this while maintaining a high common-mode
rejection ratio (CMRR). These methods are outlined in Chapter 4, Signal
Connections.
I’m using the DACs to generate a waveform, but I discovered with a
digital oscilloscope that there are glitches on the output signal. Is this
normal?
When it switches from one voltage to another, any DAC produces glitches
due to released charges. The largest glitches occur when the most
significant bit (MSB) of the D/A code switches. You can build a lowpass
- 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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