Counter N Hw Arm Signal; Routing Signals To Counter N Hw Arm Input; Counter N Sample Clock Signal - National Instruments DAQ X Series User Manual

Counter n HW Arm Signal

The Counter n HW Arm signal enables a counter to begin an input or output
function.
To begin any counter input or output function, you must first enable, or arm,
the counter. In some applications, such as a buffered edge count, the
counter begins counting when it is armed. In other applications, such as
single pulse-width measurement, the counter begins waiting for the Gate
signal when it is armed. Counter output operations can use the arm signal
in addition to a start trigger.
Software can arm a counter or configure counters to be armed on a
hardware signal. Software calls this hardware signal the Arm Start Trigger.
Internally, software routes the Arm Start Trigger to the Counter n HW Arm
input of the counter.

Routing Signals to Counter n HW Arm Input

Any of the following signals can be routed to the Counter n HW Arm input:
•
•
•
•
•
•
•
•
A counter's Internal Output can be routed to a different counter's HW Arm.
Some of these options may not be available in some driver software.

Counter n Sample Clock Signal

Use the Counter n Sample Clock (CtrnSampleClock) signal to perform
sample clocked acquisitions and generations.
You can specify an internal or external source for Counter n Sample Clock.
You also can specify whether the measurement sample begins on the rising
edge or falling edge of Counter n Sample Clock.
© National Instruments
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RTSI <0..7>
PFI <0..15>
AI Reference Trigger (ai/ReferenceTrigger)
AI Start Trigger (ai/StartTrigger)
PXI_STAR
PXIe-DSTAR<A,B>
Analog Comparison Event
Change Detection Event
7-45
Chapter 7 Counters
X Series User Manual