Why is the SHB12x-B12X LVDS cable made with the connections reversed on each end of the cable?

[sholm]

Why is the SHB12x-B12X LVDS cable made with the connections reversed on each end of the cable? Pin 1 on end end of the cable maps to pin 73 on the other end of the cable, etc.

[j_bou]

Hello sholm,

The NI SHB12X-B12X LVDS cable is used to interface with specific devices which use the12X InfiniBand connector. The online product page for this cable recommends using the NI SHB12X-B12X cable to connect the 12X InfiniBand connector on the NI 656x high-speed digital instruments with other NI accessories such as the NI SMA-2164 to break out cable signals for direct access.

NI SHB12X-B12X LVDS:

https://www.ni.com/en-us/support/model.shb12x-b12x.html

NI PXI-6541:

https://www.ni.com/en-us/support/model.pxi-6541.html

NI SMA-2164:

https://www.ni.com/en-us/support/model.sma-2164.html

Correct communication between the devices mentioned above requires that the connections be reversed. 

Regards,

J_Bou