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I have a difficulty with Altium giving me an error when I try to create a differential pair. I have placed my signal into blanket and created a net in the schematic. I also added differential pair directive pointing the two signal named with _N and _P

When I generate the ECO, Altium tells me this: "number of nets in differential pair is 1 instead of 2"

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Those are the screenshot of how the parameters are input.

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  • \$\begingroup\$ I fall into the same error. I configured in the same way but it remains the same message. someone helps me and thank you \$\endgroup\$ Feb 22 at 13:08
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Your differential pair nets must be named the EXACT same except for the _N and _P at the end. Yours are different--You have PCM_SPK1P_UG96_P and PCM_SPK1N_UG96_N. The "SPK1P" and "SPK1N" need to be the same (i.e. "SPK1").

I suggest naming your nets as follows:

PCM_SPK1_UG96_P

PCM_SPK1_UG96_N

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  • \$\begingroup\$ oh, I see the issue now. Thank you very much for this, I know I have to name them the same but didn't see the problem... \$\endgroup\$
    – user92481
    Jun 11 '16 at 12:52
  • \$\begingroup\$ Somewhat related question: does Altium have a mechanism for creating a differential pair with arbitrarily named nets? \$\endgroup\$ Nov 28 '16 at 0:52
  • \$\begingroup\$ @NickAlexeev Good question. To my knowledge, no it does not. The P and N conductors for a differential pair must have the same name except for the _P and _N suffix. \$\endgroup\$
    – DerStrom8
    Nov 28 '16 at 1:30

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