How to do a digital waveform subtraction

[ERLphase]

i am trying to subtract two digital waveform using subtract operation, but it seems that the subtraction opertation doesn't like digital waveform.

error message:"You have connected two terminals with different types. the type of the source is digital waveform, the type of the sink is double"

anybody can help? please.

[Jorge_Amaral]

Hello,

First you have to connect "get digital data components.vi" and select "data". Then you can do math operations on it.

[ERLphase]

thanks bro. it works. appreciated.

[ERLphase]

well bro. i found it only works for the waveform components of "t0 and dt" wont work if you choose the waveform component "Y", which is what i want. any idea? Thanks.

[Jorge_Amaral]

You didn't mention digital waveform? Like binary?

Do one thing.... Attach a small vi with the operation that you want. And i'll try to fix the error.

[ERLphase]

here is the vi.  i hope you can help. thank you.

[Jorge_Amaral]

Hello,

See the attached modified example. Now you can access data in a 2D array .

[ERLphase]

Thank you very much. Now i am going to change that 2-d array back to a waveform. i will try to figure it out by myself, if i encounter any question,  i will ask you.

thank you, bro.

[ERLphase]

well, how to show this 2D array digital data in the time domain, one corresponds to time, one corresponds to the amplitude? the idea is to show the output waveform after A/D converter and compare with the original analog waveform. please help me, thank you.

[Ipshita_C]

Hi,

Please clarify your objective--do you mean that you want to plot the difference between the waveform before and after the A/D converter and have time and amplitude as the X and Y axes respectively in your chart?

Ipshita C.