ADLINK Technology USB-1901, User Manual

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3 Installing the USB-1900 Series Module........................... 31
3.1 Connecting the USB-1900 Series Module ......................... 31
3.2 Device ID ........................................................................... 32
3.3 Hardware Configuration ..................................................... 33
4 Operation ........................................................................... 35
4.1 Signal Function .................................................................. 35
4.2 A/D Conversion.................................................................. 36
4.2.1 Analog Input Circuitry ............................................... 37
4.2.2 AI Data Format ......................................................... 37
4.2.3 Software Conversion with Polling Data Transfer
Acquisition Mode (Software Polling) ......................... 38
4.2.4 Continuous Acquisition (Scanning) Mode................. 38
4.2.5 Analog Input Triggering ............................................ 41
4.3 Trigger Sources ................................................................. 41
4.3.1 Software Triggering .................................................. 41
4.3.2 External Analog Triggering ....................................... 42
4.3.3 External Digital Triggering ........................................ 43
4.4 Trigger Modes.................................................................... 43
4.4.1 Post-Trigger Acquisition Mode (no retriggering) ....... 44
4.4.2 Delayed-Trigger Acquisition Mode
(no retriggering) ........................................................ 44
4.4.4 Gated Trigger............................................................ 46
4.5 D/A Conversion.................................................................. 47
4.5.1 Bipolar Output Modes ............................................... 48
4.5.2 Software Update ....................................................... 48
4.5.3 Waveform Generation............................................... 48
4.5.4 Waveform Trigger Sources....................................... 51
4.5.5 Waveform Generation Trigger Modes ...................... 52
4.6 Programmable Function I/O............................................... 56
4.6.1 TTL DI/DO ................................................................ 56
4.6.2 General Purpose Timer/Counter............................... 57
4.7 Basic Timer/Counter Function ........................................... 57