Waveform Chart from one constant and one varying analog signal?

[ProgChemist]

I am trying to create a waveform chart from one constant analog pulse signal (which used to drive a stepper motor) and one varying analog signal. I know I need to use a PWM program to interpret the varying analog signal for the intensity of my y-axis, but I am uncertain of how to approach this task, mainly because my other, constant signal is what determines my x-axis in even increments.

Can anyone suggest example programs or tips to help me get started? I am a Chemist in the end of grad school, not a programmer, and I need to update an old, Raman spectrometer to a digital interface.

[Andy_C.]

Hello ProgChemist,

Are you trying to generate PWM signal on your analog output channel? If so, there are examples written in the example finder. You can locate it by Help>Find Examples>Search for PWM. Also, what is the daq card that you are using?

[ProgChemist]

Thank you for answering.

Ok, so I am incredibly new to Labview and programming in general. I am a chemist by trade. The serial number on my DAQ device is BNC-2110, is this what your asking about?  

Also, am I trying to generate a PWM signal for my analog output.

My two (one constant, one not) analog signals coming from the instrument in question needs to go through an analog to digital conversion. I understand this is what the PWM program does. When you say "generate a PWM signal for my analog output", do you mean generate the characterized digital pulses as a function of my incoming raw signal? If so, where and how would my actual waveform chart come in? 

Thankfully,

Out of his place Chemist.

[Andy_C.]

Hello ProgChemist,

I would recommend you to look at the following tutorials on how to program in LabVIEW.

http://www.ni.com/academic/labview_training/

As to generating PWM signals, there is an example on our community site that demonstrate PWM simulation example which could be helpful to your application

http://decibel.ni.com/content/docs/DOC-4599

Let me know if those documents are helpful~

[Coq_Rouge]

I just helped someone else with this today. Take a look at this example .......examples\general\graphs\charts.llb\Charts.vi