Event count

[Giorgig]

Can I measure one signal frequency type sqare wave TTL greater than 1 KHz but less than 5 KHz with one channel of NI6507 configured as input?

I have my sytem configured as below:

Pentium 3
Windows NT os
NI6507
I drive the ni6507 with Visual Basic 6.0 and daq32.dll.

I use the following instruction for read the state of port 0 of NI6507

DIO_err = DIG_In_Port(1, 0, a%)

but I can't make to count signal with frequency greater than 1 KHz?

thanks.

[RIO-Todd]

The DAQPad-6507 digital inputs/outputs are static meaning that the speed you at which you'll be able to read/write with the device will be totally system dependent. A faster processor could possibly increase the speed at which you can read with the device.

We have multifunction DAQ devices that have counters that would be able to count a TTL signal with a frequency up to 20 MHz. I have included a link to a multifunction DAQ device in the DAQPad form factor below. Let me know if you have any questions.

NI DAQPad-6020E for USB
http://sine.ni.com/apps/we/nioc.vp?cid=11922〈=US

Regards,

Todd D.
NI Applications Engineer

[Giorgig]

It is what I was expecting, thanks Todd.