# Use of NI6711 card.

How I have asked before, i need generate four signal:
1) One sine- wave signal from 0 to -4 Volt, and frequency less than 100 KHz.
2) One trigger signal, amplitude 10 V, frequency 3200 Hz and pulse- width from 1 to 10 micro Seconds.
3) Two trigger signal, amplitude 5V, frequency 0.4 Hz and pulse- width 20/70 mS in opposite phase.
4) Two square wave signal amplitude 5V, frequency 2 KHz, in opposite phase.
For this application I have thought an Ni6711, used at follow mode:
One of four analog output to generate the first signal.
One other of three free analog output to generate the second signal.
Two of 8 digital I/O for generate the signal at the third point.
The counter/timers output to generate the two signal at the point four.
But Felipe in his answer (tanks Felipe) sayng that regarding my third signal requirement,
I need to have two more counters to do that. He saying that because, the digital lines
of that board don't have strobed, operation capability.
Can I use for generate the signal at the third point the two remainder free analog output?
in stead of two of 8 digital I/O?
Tanks.

Hello;
You can do that. As the frequency of the pulse train you need is not high, you can rely on the Analog Output channels to accomplish that. That is a good idea.
Regards
Filipe

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I need generate two signal, the first are an trigger signal, 10 V amplitude, pulse width 10 micro-seconds
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The second signal is an triangular wave, amplitude between 0/-4V, this signal must be in phase with the first, and its frequency must be the frequency of first signal multiplied for 5
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Hello;
Yes, you can do that, but to generate the triggered TTL pulse train, you will need to use a 660x board together with the 6711.
I'm saying that because the counters of the 6711 board, don't have triggering capabilitie; and the counters of the 660x do.
As you need synchronization, you will need to connect both boards together by using the RTSI cable. Once that is hooked up, you can definitely use Visual Basic and NI-DAQ dll function calls to accomplish that.
Hope this helps.
Filipe

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