06-26-2013 04:00 PM
I have a PXI chassis with a PXI-2532 512-Crosspoint Matrix Switch Module, a TB-2640 connected to it, and a PXI-4072 FlexDMM and LCR meter.
I am trying to use the DMM to make measurements of something connected to the switch matrix. What I can't seem to figure out, is since the matrix is a 1 wire 4x128 matrix, how do you connect 256 points when there are only 128 conductors in the ribbon cables that attach to the 2640? There are 2 banks of 8, each with 16-pins, on the TB-2640, that seem to be wired internally together. I would like to utilize 256 points in the 512 matrix at a time, and currently I have the DMM hooked up to r0 and r1 to take the measurements. How would I hook up r2 and r3, in the same matrix?
If you are really confused I can explain further, but I haven't found anything that shows how you would actually connect 256 wires to the 2532, when there are only 128 columns. Any information helps.
Thank you.
06-27-2013 01:34 PM
Since the matrix is a 4x128, there are 4 rows and 128 columns to which you can connect devices under test (DUTs). You can not connect 256 different DUTs because there are not 256 connections. The points refer to the switches inside the card rather than the actual signals.
Here's a bit more info:
http://www.ni.com/white-paper/4453/en#toc3
Also I would post future switch questions here:
http://forums.ni.com/t5/Switch-Hardware-and-Software/bd-p/320
I hope this helps,
Eric E.