controlling the sec/div as in a osilloscope

[laskar01]

Hi, I want to control the time-span of the x-axis when using a chart or graph (forgot the defference between them) with a knob

as is done in an oscilloscope.

How can that be done?

Kindest regards,

Lasse

[kekin]

You can do it by changing the scale maximum & minimum value of your X axis in run time using property node. Also you can set the step size of the grid by changin increment property. It's very simple.

Kudos are welcomed.:-)

[laskar01]

Friend, I cannot do it...

I have attached an examplefile that I've found, I've rightclicked on the waveformchart selected propertynode but there are myriads to choose between.

Could you show me, by modifying the attachment?

Kindest regards,

Lasse

[GerdW]

Hi Lasse,

"there are myriads to choose"

Well, but not all of them handle the x scale... I would use something like x-scale -> range -> Min&Max...

[laskar01]

Yes, but they are all outputs.

Don't I need a property node with an input?

Please show on the attached. Still a beginner....

Kindest,

Lasse

[GerdW]

Hi Lasse,

ever noticed those many options available by right-click? So right-click the property node and select "change to read"...

"Still a beginner..."

So you should start here!

[laskar01]

Hi Gerd, there is nothing in the tutorial you mentioned about property nodes!

[GerdW]

Hi Lasse,

not explicitely in detail, but here you can start After that you could continue here...

[DFGray]

One other tip, which may not be obvious.  Things that work well on a box instrument do not work so well on a computer user interface.  Knobs are a good example.  They are excellent on a physical oscilloscope, but are difficult to use on a computer.  For this application, which has a set number of options, a combobox or ring would work much better.

[laskar01]

Hi DFGray and all other readers.

I've added the knob, but it doesn't change the setting of the graph dynamically as in a oscilloscope.

I don't understand the suggestion you mentioned can you show me in my vi ?

I also have a problem with my receiving signal when I am changing the frequency... Neither my receiving signal change dynamically when I change the signal that I am ouputting (coupled ao1 straight to ai1).

I have to stop and then restart to have the input and output plot follow each other.

Kindest regards,

Lasse