BNC-2121 Connector Accessory for 660X Devices
8
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Simple Event Counting
To perform simple event counting, connect a wire from the
spring
terminal to SOURCE of the selected counter. The 660
X
device counts the
number of pulses that occur on SOURCE.
Alternatively, you can connect a wire from the
Trigger
spring terminal to
provide pulses on SOURCE.
Gated Event Counting
To perform gated event counting, complete the following steps.
1.
Connect a wire from the
spring terminal to SOURCE of the
selected counter.
2.
Connect a wire from the
Trigger
spring terminal to GATE of the
selected counter.
3.
Press and hold the
Digital Trigger
button to drive GATE into a high
state. The counter counts the pulses on SOURCE as long as GATE is
high.
4.
Release the
Digital Trigger
button to drive GATE into a low state. The
counting halts and retains its value until you press the
Digital Trigger
button again and counting continues.
Single Period Measurement
To take a single period measurement, complete the following steps.
1.
In the C interface or in LabVIEW, select an internal timebase as
SOURCE of the selected counter.
2.
Connect a wire from the
spring terminal to GATE of the selected
counter. The counter counts the rising edges on SOURCE between two
active GATE edges. The period is this count multiplied by the period
of SOURCE.
Single Pulse-Width Measurement
To take a single pulse-width measurement, complete the following steps.
1.
In the C interface or in LabVIEW, select an internal timebase as
SOURCE of the selected counter.
2.
Connect a wire from the
Trigger
spring terminal to GATE of the
selected counter.
3.
Press the
Digital Trigger
button to drive GATE into a high state.
The counter counts the rising edges on SOURCE while GATE is
active.
4.
Release the
Digital Trigger
button to drive GATE into a low state.
The counter value is latched for a software read.
