National Instruments PCI-6238 User Manual page 67

Counters
Caution When making measurements, take into account the minimum pulse width and
time delay of the digital input and output lines. Refer to the NI 6238/6239 Specifications
for more information.
© National Instruments Corporation
NI 6238/6239 devices have two general-purpose 32-bit counter/timers and
one frequency generator, as shown in Figure 7-1. The general-purpose
counter/timers can be used for many measurement and pulse generation
applications.
7-1
7
NI 6238/6239 User Manual