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Home/Forums/T7/ Limited by only 2 frequency digital inputs.
The T7 has 2 hardware based frequency inputs on FIO0 & FIO1, but you can also enable 4 more firmware based frequency inputs on FIO2, FIO3, FIO6, and FIO7.
For slower signals, there are options you can do in script. For example, we have written a script that counts pulses on all 23 digital inputs and 14 analog inputs, so 37 counters total. Last I heard it worked with pulse rates up to about 200 Hz, but that could likely be improved if we took a fresh look at it. Also, you could implement counters on all analog inputs with a Mux80 to get 23+84 = 107 counters. The analog input counters can be nice because you can customize the high-low threshold.
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The T7 has 2 hardware based frequency inputs on FIO0 & FIO1, but you can also enable 4 more firmware based frequency inputs on FIO2, FIO3, FIO6, and FIO7.
https://labjack.com/support/datasheets/t7/digital-io/extended-features
You enable 4 counters on CIO0-CIO3 and use the count-over-time method to measure frequency:
http://forums.labjack.com/index.php?showtopic=1105
For some frequencies you can use the RMS_Auto AIN-EF feature on analog inputs to measure frequency:
https://labjack.com/support/datasheets/t7/ain/extended-features/rms
For slower signals, there are options you can do in script. For example, we have written a script that counts pulses on all 23 digital inputs and 14 analog inputs, so 37 counters total. Last I heard it worked with pulse rates up to about 200 Hz, but that could likely be improved if we took a fresh look at it. Also, you could implement counters on all analog inputs with a Mux80 to get 23+84 = 107 counters. The analog input counters can be nice because you can customize the high-low threshold.