ni-5640怎样传数据到fpga并且用示波器读出来

[ni5640]

Hi:

刚开始用labview fpga，现在想传一组数据从host 到 fpga并且用示波器读出来，但试了好多天都不成功，请教下怎么建立那样的连接。。

Thanks

[frankey0121]

After you have installed the ni-5640 driver, there are some examples including basic AI&AO, you could find them by Start>>National Instrument>>NI-5640R>>Examples. And also, i recommend you to read the Getting Start document which could be found by Start>>National Instrument>>NI-5640R>>Documents.

[ni5640]

Hi, Frankey:

If I only want to read a real part of an array of complex number, do I need to set up I & Q value?

Thanks 

[Frankey]

M(t) = A(t)cos(Fc.t+theta(t)),

we take I=A(t).cos(theta(t)), Q=-A(t). sin(theta(t)),

so we get M(t) = I.cos(Fc.t) + Q.sin(Fc.t)

So I&Q is necessary for DUT.

[Frankey]

And after DDT, you could get I&Q data. But I or Q could be zero (e.g. theta(t) = 0 or 90 degree).

[ni5640]

Hi;

现在能用示波器抓到些数据但有些失真，请问下原因？

labview产生的数据

示波器抓到的数据

谢谢