Keithley KPCI-3101 Series, User Manual

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KPCI-3101 — KPCI-3104 Series User’s Manual Installation and Configuration 3-21
Connecting counter/timer signals
The KPCI-3101–4 Series board and STA-300 screw terminal panel provide counter/timer chan-
nels that you can use to perform the following operations:
• Event counting
•
Frequency measurement
• Pulse output (rate generation, one-shot, and repetitive one-shot)
This section describes how to connect counter/timer signals to perform these operations. Refer
to
“Counter/Timer features” on page 2-19 for more information on using the counter/timers.
Connecting event counting signals
Figure 3-14 shows one example of connecting event counting signals to the STA-300 screw ter-
minal panel using user counter 0. In this example, rising clock edges are counted while the gate
is active.
Figure 3-14
Connecting event counting signals (shown for clock input 0 and external gate 0)
STA-300 Panel
TB26
Signal Source
Digital Ground
User Clock Input 0
TB29
TB28
Digital Ground
Gate 0
External
Gating
Switch
TB25