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Operation Theorem
l
Positive-slope trigger event occurs
Negative-slope trigger event
occurs
Level +0.5V
External Digital Trigger
An external digital trigger occurs when a rising edge or a falling
edge is detected on the digital signal connected to pin3 of JP1 for
external digital trigger.
5.3.2
Simultaneous Trigger for Multiple Cards
When multiple PCI-9812 cards are used in one system, the trigger
sources of every card can be connected together to provide the
function of simultaneous trigger for multiple cards. Please note that
simultaneous trigger is not equivalent to simultaneou A/D
conversion. The theoretical time difference between the samples
on different card will be ½ of the clock period. Refer to section 5.4
for more information about A/D conversion clock control.
Negative-edge trigger
event occurs
Positive-edge
trigger event
occurs
Summary of Contents for NuDAQ PCI-9812/10
Page 1: ...NuDAQ PCI 9812 10 20MHz Simultaneous 4 CH Analog Input Card Users Guide ...
Page 4: ......
Page 57: ...C C Library 49 ...
Page 61: ...Calibration 53 ...
Page 69: ...Software Utility 61 ...