Frequency Measurement - Data Translation DT9812 Series User Manual

Chapter 3
Figure 13: Connecting Counter/Timer Signals for an Event Counting Operation

Frequency Measurement

One way to measure frequency is to connect a pulse of a known duration to the Counter 0
Gate signal, as shown in
number of counts divided by the period of the signal connected to the Counter 0 Gate input.
Signal
Source
Figure 14: Connecting Counter/Timer Signals for a Frequency Measurement Operation
40
Ground
Signal
Source
Counter 0 In
Figure
Ground
Counter 0 In
(Number of pulses counted
during gate period)
Known Signal
Source
Using an External Pulse
Without Using a Gate
14. In this case, the frequency of the Counter 0 In signal is the
Counter 0 Gate
(Determines period
for count)
DT9812, DT9813, or
DT9814 Series Module
19
18
DT9812, DT9813, or
DT9814 Series Module
19
18
16