KPCI-3101 — KPCI-3104 Series User’s Manual
Gate types
The active edge or level of the gate input to the counter enables counter/timer operations. The
operation starts when the clock input signal is received. The KPCI-3101–4 Series board provides
the following gate input types:
•
None — A software command enables any specified counter/timer operation immediately
after execution. This gate type is useful for all counter/timer modes.
•
Logic-low level external gate input — Enables a counter/timer operation when the external
gate signal is low, and disables the counter/timer operation when the external gate signal is
high. Note that this gate type is used only for event counting, frequency measurement, and
rate generation; refer to
for more information on these modes.
•
Logic-high level external gate input — Enables a counter/timer operation when the exter-
nal gate signal is high, and disables a counter/timer operation when the external gate signal is
low. Note that this gate type is used only for event counting, frequency measurement, and
rate generation; refer to
for more information on these modes.
•
Falling edge external gate input — Triggers a counter/timer operation on the transition
from the high level to the low level (falling edge). In software, this is called a low edge gate
type. Note that this gate type is used only for one-shot and repetitive one-shot mode; refer to
for more information on these modes.
•
Rising edge external gate input — Triggers a counter/timer operation on the transition
from the low level to the high level (rising edge). In software, this is called a high-edge gate
type. Note that this gate type is used only for one-shot and repetitive one-shot mode; refer to
for more information on these modes.
Specify the gate type in software. Connect an external gate input to the board through the
STA-300 screw terminal panel as follows:
•
For Counter 0, connect the external gate signal to screw terminal TB28 (pin 39 of
connector J1)
•
For Counter 1, connect the external gate signal to screw terminal TB32 (pin 5 of
connector J1)
•
For Counter 2, connect the external gate signal to screw terminal TB36 (pin 38 of
connector J1)
•
For Counter 3, connect the external gate signal to screw terminal TB40 (pin 4 of
connector J1)
Содержание KPCI-3101 Series
Страница 1: ...User s Manual KPCI 3101 3102 3103 3104 Series PCI Bus Data Acquisition Boards 98150 Rev A 10 99...
Страница 10: ...iv...
Страница 15: ...1 Overview...
Страница 21: ...2 Principles of Operation...
Страница 53: ...3 Installation and Configuration...
Страница 78: ...3 26 Installation and Configuration KPCI 3101 KPCI 3104 Series User s Manual...
Страница 79: ...4 Testing the Board...
Страница 82: ...4 4 Testing the Board KPCI 3101 KPCI 3104 Series User s Manual...
Страница 83: ...5 Calibration...
Страница 86: ...5 4 Calibration KPCI 3101 KPCI 3104 Series User s Manual...
Страница 87: ...6 Troubleshooting...
Страница 94: ...6 8 Troubleshooting KPCI 3101 KPCI 3104 Series User s Manual...
Страница 95: ...A Specifications...
Страница 107: ...B Connector Pin Assignments...
Страница 111: ...C Systematic Problem Isolation...
Страница 145: ...This page intentionally left blank...
Страница 146: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...