National Instruments 636 Series User Manual

7-36 | ni.com
Chapter 7 Counters
For information about connecting counter signals, refer to the
Default Counter/Timer Pins
section.
Counter Timing Signals
X Series devices feature the following counter timing signals:
•
Counter n Source Signal
• Counter n Gate Signal
• Counter n Aux Signal
• Counter n A Signal
• Counter n B Signal
• Counter n Z Signal
• Counter n Up_Down Signal
• Counter n HW Arm Signal
• Counter n Sample Clock Signal
• Counter n Internal Output Signal
• Counter n TC Signal
• Frequency Output Signal
Note All counter timing signals can be filtered. Refer to the PFI Filters section of
Chapter 8,
PFI, for more information.
In this section, n refers to the X Series Counter 0, 1, 2, or 3. For example, Counter n Source refers
to four signals—Counter 0 Source (the source input to Counter 0), Counter 1 Source (the source
input to Counter 1), Counter 2 Source (the source input to Counter 2), or Counter 3 Source (the
source input to Counter 3).
Each of these signals supports digital filtering. Refer to the
PFI Filters section of Chapter 8, PFI,
for more information.
Counter
n Source Signal
The selected edge of the Counter n Source signal increments and decrements the counter value
depending on the application the counter is performing. Table 7-8 lists how the terminal is used
in various applications.
Table 7-8. Counter Applications and Counter
n Source
Application Purpose of Source Terminal
Pulse Generation Counter Timebase
One Counter Time Measurements Counter Timebase

National Instruments 636 Series Specifications

General

Brand	National Instruments
Model	636 Series
Category	Data Loggers
Language	English