(dilemma) saving files

[celynn]

Hi, Can anyone advise me on this.

Say i want to edit 1 of the vi from the vi library. i want to edit the psd.vi sub vi FFT to display its complex number into the top level vi.

Must i copy the entire main vi with all its sub vi into another file? because i feel if i do that i am increasing the capacity of my pc.

Is it neccessary to copy the entire vi as i prefer to preserve the unmodify vi as they are in their existing location.

Attach is my main vi hierachy.

[tst]

You only need to make copies of the VIs that you change. The rest of the VIs can stay where they are and be called by anyone.

You should be careful when making changes to VI.lib VIs and make sure that you make your changes on a copy and not on the original.

[celynn]

Do i save the entire psd.vi into a new custom vi.?

Actually i have no idea to go about getting the complex value to the top level vi.

Can you give me more advise?

Thanks

[tst]

I assume you mean the one called One Sided FFT spectrum.

It seems to me that you will have to create an indicator for that number, connect that indicator in the VIs connector pane (by right clicking the VI icon when seeing the FP and selecting Show Connector) and do the same to all the calling VIs. Any changed VI will have to be saved elsewhere.

Is it possible to reverse the calculation NI is doing and get the complex number back from the number that's already coming out of the VI?

[celynn]

It seems to be a better idea to convert dB to complex number but any idea how?

i have tried to copy the sub vi and Modify them but is too complex coz in a psd.vi the fft is in the sub sub vi level.