Keithley KPCI-3101 Series, User Manual

Page: 76 / 146

3-24 Installation and Configuration KPCI-3101 — KPCI-3104 Series User’s Manual
Figure 3-19 shows an example of how to externally cascade two counters to perform a rate gen-
eration operation using user counters 0 and 1. Note that you can also cascade counters internally
using software; if you internally cascade the counters, you do not need to make the external cas-
cading connections. In this example, counter 1 gate is logic high.
Figure 3-19
Cascading counters (shown for rate generation using counters 0 and 1
and external gate 0)
Figure 3-20 shows an example of how to cascade two counters externally to perform a one-shot
operation using user counters 0 and 1. Note that you can also internally cascade counters using
software; if you internally cascade the counters, you do not need to make the external cascading
connections. In this example, counter 0 gate is logic high.
Figure 3-20
Cascading counters (shown for one-shot using counters 0 and 1 and external gate 1
STA-300 Panel
TB26
Signal Source
Digital Ground
TB29
TB28
Digital Ground
Gate 0
External
Gating
Switch
TB27
TB30
User
Counter
Output 0
User Clock
Input 1
TB25
User Clock Input 0
STA-300 Panel
TB26
Signal Source
Digital Ground
TB29
TB32
Digital Ground
Gate 1
One-Shot
Trigger
TB27
TB30
User
Counter
Output 0
User Clock
Input 1
TB25
User Clock Input 0