Keithley KUSB-3100, Руководство пользователя

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Principles of Operation
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Counter/Timer Features
This section describes the following features of counter/timer (C/T)
operations:
• C/T channels, described on this page;
• C/T clock sources, described on page 26 ;
• Gate types, described on page 26 ;
• Pulse types and duty cycles, described on page 27 ; and
• C/T operation modes, described on page 28 .
C/T Channels
The KUSB-3100 module provides one 32-bit counter/timer (16 bits in
rate generation mode). The counter accepts a C/T clock input signal
(pulse input signal) and gate input signal, and outputs a pulse signal
(clock output signal), as shown in
Figure 3 .
Figure 3: Counter/Timer Channel
C/T Clock Input SIgnal
(internal or external)
Counter
Gate Input Signal
(software or
external input)
Pulse Output
Signal