Steve,
Take a look at the following 2example vis included with labview. By
combining their functionality I think you can get what you want...
C:\Program Files\National Instruments\LabVIEW
6\examples\math\math.llb\Behavior of Modified Function Graph.vi
C:\Program Files\National Instruments\LabVIEW
6\examples\daq\solution\benchtop.llb\Arbitrary Waveform Generator.vi
The first takes an equation and generates a waveform
The second has some of the built in functions (sin, etc) and a neat "draw a
waveform" interface that can then be used to drive AO.
Best,
Darrell
--
Darrell Henze, Ph.D.
Center for Molecular and Behavioral Neuroscience
Aidekmann Research Center
Rutgers University
197 University Ave.
Newark, NJ 07102
Henze@axon.rutgers.edu
Phone: 973-353-1080 x3361
office x 3054 lab
Fax: 973-353-1820
____________________________________________________________________
Time is just nature's way to keep everything from happening at once.
_Steven Chang wrote:
> Hi all,
>
> I need to develope (perhaps look for) an user interface in Labview which
> allows the user to specify an arbitrary waveform which then the 2-D
> signal coordinates will be sent to a HP arbitrary waveform generator
> across GPIB. NI has already available the VI for sending an arbitrary
> waveform to the instrument, but now the trouble is getting that
> arbitrary waveform points (8 to 16000 points) from the user.
>
> One of my ideas would be to use the math functions (for i.e. the step
> function) and cascade them if necessary. I would not want to have the
> need for the user to actually place a step function into the back panel
> of the VI. Perhaps just a string control which the user can enter an
> algebraic expression involving the step function (which some parsing
> work
is necessary).
>
> Bottomline...What is a good way of letting a user define one's arbitrary
> waveform?
>
> I Appreciate your help...
> Steven
>
> --
> Remove nospam
