make a full wave rectifier using labview

[David-n-MO]

at first I was stumped, but then after discussing this with my cohorts we realized what was happening and you are right in that an I16 = -32768 can't be absolutatized... which makes a saturated waveform look very strange.  So the real answer is to coerce the values to +-32767 before rectifying.

Now with regards to that last comment.  If  you think that I was demeaning either myself or people in the forum then you are in need of more help than I can give.

Merry Christmas!

[billko]

I think we are all being a bit over-sensitive.  🙂

[DCKAN]

Hey David,

The simillar problem I had faced with FPGA High Speed data streaming @ 750MBPS Streaming on Hard Drive...

In case, the buffer of where you are fatching signal gets full with no space left for new samples, it gets data over written. As the PXIe 5122 is 14- bit card with 2GSPS sampling capability, you fatch data from card buffer before buffer gets overflow. This is very unusual issue with High Speed (HS) data streaming or HS data acquision.

The issue occurs due to its duo-byte structure (8+8). When buffer gets full, it tries to over write data stored on it. As you are fatching data same time, the memory is written in such manner that you get 8+8 combination in wrong manner, overlaped or overwritten.

The best solution is, use QUEUE to store this data in PC memory (RAM) and store them ASAP. If you try to keep more data into PC memory, the LabVIEW error of memory run out will be there. So, Use slow sampling rate for long time or high sampling rate for less time for the application will be banificiary for you.

Regards,

DCKAN