In PCI -5154 I want to acquire only peak of the sine wave.How to do it.

[pramodsuper@gmail.com]

Hi ,

I have PCI-5154 digitizer.I want to acquire only single point in a wave , say in sine waveform i want to acquire only peak not all data.How can i do it.And also What is the memory 256MB on board memory mean?

[Henrik_Volkers]

Digg into the manual of NI-Scope and you find

the scalar measurements provide a list of supported on board measurments including Peak-to-Peak-Voltage ...

(or in short RTFM SCNR 😉 )

[pramodsuper@gmail.com]

I didnot understand it.Actually i dont want acquire and analyze of wave .I want to acquire only peak of the sine wave.Which way is suitable whether triggering ,timer.

[Henrik_Volkers]

It's hard to make a valid measurement if you don't understand it 😉

Set up a ni-scope task and configure the samplerate at least n=20 times the measured frequency with at least 2n samples , then instead of reading the waveform and analyze it by your own,  use the vi noted and you get the peak to peak value. Divide it by 2 and you have the amplitude 🙂  (and you compensated a possible offset at the same time 😉 )

Are you shure that your (frequency stable!) sine is in sync with your sampleclock?

Maybe it's even more simple to aquire when you use the express-vis, but I never used them for serious tasks, since then I want to know what I do...