Counter Input; Timer Output - Measurement Computing USB-1208HS-2AO User Manual

USB-1208HS-2AO User's Guide
Figure 9. Location of W34 jumper (default pull-down setting shown)
6. Replace the top section of the case, and then fasten it to the bottom section with the four screws.
For more information on digital signal connections
For general information regarding digital signal connections and digital I/O techniques, refer to the Guide to
DAQ Signal Connections (available on our web site at www.mccdaq.com/signals/signals.pdf).

Counter input

CTR0 and CTR1 provide connections to each 32-bit counter input channel. Each counter can count frequencies
of up to 20 MHz.

Timer output

Use the terminal to connect to the pulse width modulation (PWM) timer output. You can set the following
TMR
timer output parameters through software:

pulse frequency

duty cycle (pulse width divided by the pulse period)

number of pulses to generate

time delay before starting the timer output after it's enabled

resting state of the output (idle high or idle low)
The timer can generate a pulse output with a programmable frequency range of 0.00931 Hz up to 20 MHz.
Figure 10. Pull-down and pull-up configurations
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Functional Details