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Differential Pair Phase Tolerance matching error

pcbeng25

I cannot seem to get my differential pairs to phase match, and the router is not creating tiny tuning trombones on half of the pair to match the pair either.  Is there a constraint that needs to be set for the router to allow tuning trombones to be created for pair phase matching?  I define the pair as follows:

  define (pair (nets %R3008<1> %R3009<1>))

define (class dac_data (add_net %R30*<1>))
rule class dac_data (phase_tolerance_length 0.04)
rule class dac_data (limit_way 20)
circuit class dac_data (priority 200)
circuit class dac_data (use_layer L2)
 

All I get is a phase mismatch error, but the router does not add a small trombone or meander even when I have a PCB rule set to allow trombone and meanders.  Anyone have an idea what would cause the router to NOT fix the pair?

I am using Allegro PCB Router v16.3.

Thanks in advance.

 

Parents
  • lcanx2
    Try this: “rule class dac_data (phase_tolerance_delay .04)”  Bill

     

Reply
  • lcanx2
    Try this: “rule class dac_data (phase_tolerance_delay .04)”  Bill

     

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