Custom ramps through the NI cards

[Karthik Chandrashekara]

Hi everyone,

I am looking in to implementing user-defined ramps via analog NI cards using the "customramp" function:

Ultimately, we might switch to using another AWG to which we upload the ramps and trigger them in the sequence but we wanted to know how to be able to program arbitrary ramps with the NI cards through labscript anyway. Here is an instance of one such attempt,

 

A function was defined the following way:

And written in the sequence like so:

But I currently get this error:

I am not entirely sure where the error on my part is. I started actually by passing the function handle but I received an error that it should not be a function which is why I switched to passing the ramp as an array to the customramp function. What could be the issue here? In general, what are some best practices to programming custom ramps via labscript? 

[Ian B. Spielman]

Dear Karthik ,

Things are much more simple than you are thinking. Here is an example CustomRamp:

def LineRamp(t, duration, Initial, Final):
"""Creates a linear ramp from Initial to Final"""
f = t / duration
return (1 - f) * Initial + f * Final

— Ian

Ian B. Spielman

Fellow, Joint Quantum Institute
National Institute of Standards and Technology and the University of Maryland

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> On Sep 18, 2024, at 11:07, Karthik Chandrashekara <karthi...@gmail.com> wrote:
>
> Hi everyone,
>
> I am looking in to implementing user-defined ramps via analog NI cards using the "customramp" function:
>

> <Capture1.PNG>
>
> Ultimately, we might switch to using another AWG to which we upload the ramps and trigger them in the sequence but we wanted to know how to be able to program arbitrary ramps with the NI cards through labscript anyway. Here is an instance of one such attempt,
> A function was defined the following way:
>

> <Capture2.PNG>
>
> And written in the sequence like so:
>

> <Capture3.PNG>
>
> But I currently get this error:
>

> <Capture.PNG>
>
> I am not entirely sure where the error on my part is. I started actually by passing the function handle but I received an error that it should not be a function which is why I switched to passing the ramp as an array to the customramp function. What could be the issue here? In general, what are some best practices to programming custom ramps via labscript?
>

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> <Capture2.PNG><Capture1.PNG><Capture3.PNG><Capture.PNG>

[Karthik Chandrashekara]

Dear Ian,

Thank you! Indeed I was overthinking this. With the rest as is, redefining the function I wanted to implement like so -

- gave me what I needed!

Cheers,
Karthik