12-28-2009 12:43 PM
What exactly do you need help with? Have you tried the Ramp Pattern on the Signal Processing>Signal Generation palette? Have you searched for Ramp/Step in this board?
If you are creating a pattern in software, the x axis of a graph is whatever you define it to be with x min and x max. You can set the offset and multiplier from thegraph's property page.
04-29-2012 10:56 PM
Yes there are examples and you can still find it by right clicking the function (In your case right click the Basic Function Generator) in LabVIEW. For creating step function why do you need a function generator you can directly step the value manually to the desired value.
04-30-2012 12:16 AM
Yes, I read the help windows.
If i use the pulse pattern, if I key in the samples=22, amplitude=1, delay=2, width=20, the waveform i see as described follow:
I see at it reach 1 at 2 second, and continuous(Still at 1) to the 21second.
Can we assume samples = time? meaning, the pulse pattern will stop at 21 second?
Does it means , after 21 second the signal already get chooped off (meaning dont have the off)...this is trying to get the step function.
For the Basic Function Generator, how to simulate a singnal at 2s at the amplitude of 1, and i continuous till 21 second(no off period)...to simulate the step function?
can I have a look on the vi for that?
04-30-2012 12:50 AM
Create a function generator vi in that give the desired value to which you want to step (for instance ao1 you are using and the present value it holds is 2 V and your desired value is 4 V as step). Check the time once 2 s is reached give the desired step value (So once time reached give the 4 V command to ao1 so it will hold the same value until you give the next one). It just works like a switch from one value to other.
04-30-2012 02:06 AM
I have attached a vi for your reference you can use that as a sub vi ( You have to modify it as per your logic). The vi steps the signal after a defined period of time and holds that until the next trigger happens.