Adlink DAQe-2502 Manual do Utilizador descarregar pdf (Página 42)

32 Operation Theory

Hardware-Controlled Waveform Generation

FIFO is a hardware first-in first-out data queue that holds tempo-

rary digital codes for D/A conversion. When the DAQ-/DAQe-/PXI-

2502/2501 card operates in waveform generation mode, the

waveform patterns are stored in FIFO with 8K maximum samples.

Waveform patterns larger than 8K are also supported by utilizing

bus-mastering DMA transfer supported by the PCI controller. The

data format in FIFO is shown in Figure 4-7.

Figure 4-7: FIFO Data Format

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 73 74

NuDAQ-2500 Series 1
Getting service 3
Using this manual 5
1.3 Conventions 6
Table of Contents 7
List of Tables 9
List of Figures 10
1 Introduction 11
1.2 Applications 12
1.3 Specifications 13
Analog Input (AI) 14
Ω / 6 pF 14
Analog Trigger (A.Trig) 15
6Introduction 16
1.4 Block Diagram 17
1.5 Software Support 18
DAQ-LVIEW PnP: LabVIEW Driver 19
D2K-OCX: ActiveX Controls 19
10 Introduction 20
2 Installation 21
2.2 Unpacking 22
2.3 Card Layout 23
DAQ-2502/2501 24
DPXI-2501/2502 25
2.4 PCI Configuration 26
3 Signal Connections 27
Signal Connections 19 29
20 Signal Connections 30
4 Operation Theory 31
AD Data Format 32
Acquisition Modes 33
Scan Timing and Procedure 34
Operation Theory 25 35
Figure 4-1: Scan Timing 35
Trigger Modes 36
Operation Theory 27 37
) * PSC_counter 37
Figure 4-3: Delay Trigger 37
28 Operation Theory 38
Operation Theory 29 39
ADLINK All-in-One CD 40
4.2 D/A Conversion 41
32 Operation Theory 42
Figure 4-7: FIFO Data Format 42
Setting up the DACs 43
Software Update 44
Waveform Generation 45
Waveform Generation Timing 46
Operation Theory 37 47
Operation Theory 39 49
40 Operation Theory 50
Iterative Waveform Generation 51
42 Operation Theory 52
Operation Theory 43 53
Figure 4-14: Stop Mode I 53
44 Operation Theory 54
Figure 4-15: Stop Mode II 54
Figure 4-16: Stop Mode III 54
Operation Theory 45 55
46 Operation Theory 56
Operation Theory 47 57
Figure 4-17: Mode1 Operation 57
48 Operation Theory 58
Figure 4-18: Mode2 Operation 58
Figure 4-19: Mode 3 Operation 58
Operation Theory 49 59
Figure 4-20: Mode4 Operation 59
Figure 4-21: Mode5 Operation 59
50 Operation Theory 60
Figure 4-22: Mode6 Operation 60
Figure 4-23: Mode7 Operation 60
Operation Theory 51 61
Figure 4-24: Mode8 Operation 61
4.5 Trigger Sources 62
54 Operation Theory 64
Operation Theory 55 65
4.6 Timing Signals 66
Operation Theory 57 67
58 Operation Theory 68
5 Calibration 69
5.2 Auto-calibration 70
Appendix 71
Warranty Policy 73
64 Warranty Policy 74

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