KPCI-3101 — KPCI-3104 Series User’s Manual
Figure 2-2
Continuous post-trigger mode without triggered scan
illustrates the same example using triggered scan mode (either internally or exter-
nally retriggered). The multiscan count is 2, indicating that the channel-gain list will be scanned
twice per trigger or retrigger. In this example, post-trigger analog input data is acquired on each
clock pulse of the A/D sample clock until the channel-gain list has been scanned twice; then, the
board waits for the retrigger event. When the retrigger event occurs, the board scans the channel-
gain list twice more, acquiring data on each pulse of the A/D sample clock. The process repeats
continuously with every specified retrigger event.
Figure 2-3
Continuous post-trigger mode with triggered scan
Pre-Trigger acquisition
Use pre-trigger acquisition mode (continuous pre-trigger mode) when you want to acquire data
before a specific external event occurs.
Using software, specify:
•
The dataflow as continuous pre-trigger
•
The pre-trigger source as the software trigger
•
The post-trigger source as the external digital (TTL) trigger
•
The retrigger mode as the internal retrigger (if you are using triggered scan mode)
Refer to
for more information on the supported conversion modes; refer to
for information on the supported trigger sources.
NOTE
When using pre-trigger acquisition, you cannot use externally-
retriggered scan mode; refer to
for more information on
triggered scan mode.
Post-trigger event occurs.
Chan 0
Chan 1
Chan 2
Chan 0
Chan 1
Chan 2
Chan 0
Chan 1
Chan 2
Chan 0
Chan 1
Chan 2
A/D
Sample
Clock
Post-trigger data acquired
continuously.
Post-trigger event occurs;
post-trigger data acquired for
two scans of the CGL.
Chan 0
Chan 1
Chan 2
Chan 0
Chan 1
Chan 2
A/D
Sample
Clock
Chan 0
Chan 1
Chan 2 Chan 0
Chan 1
Chan 2
Retrigger event occurs;
post-trigger data acquired for
two scans of the CGL.
Board waits for
retrigger event.
Содержание KPCI-3101 Series
Страница 1: ...User s Manual KPCI 3101 3102 3103 3104 Series PCI Bus Data Acquisition Boards 98150 Rev A 10 99...
Страница 10: ...iv...
Страница 15: ...1 Overview...
Страница 21: ...2 Principles of Operation...
Страница 53: ...3 Installation and Configuration...
Страница 78: ...3 26 Installation and Configuration KPCI 3101 KPCI 3104 Series User s Manual...
Страница 79: ...4 Testing the Board...
Страница 82: ...4 4 Testing the Board KPCI 3101 KPCI 3104 Series User s Manual...
Страница 83: ...5 Calibration...
Страница 86: ...5 4 Calibration KPCI 3101 KPCI 3104 Series User s Manual...
Страница 87: ...6 Troubleshooting...
Страница 94: ...6 8 Troubleshooting KPCI 3101 KPCI 3104 Series User s Manual...
Страница 95: ...A Specifications...
Страница 107: ...B Connector Pin Assignments...
Страница 111: ...C Systematic Problem Isolation...
Страница 145: ...This page intentionally left blank...
Страница 146: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...