[SI-LIST] PCB impedance coupon measurement

  • From: Geetha Balasubramanian <geethukarrthik@xxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Sat, 19 Aug 2006 06:29:11 -0700 (PDT)

Dear Members,
                      Generally what is the frequency range for PCB impedance 
coupon measurement? Is it possible to measue the impedance of the coupon at a 
specific discrete frequency?
                       For better accuracy is it necessary to have 2 seperate 
bands one for USB full speed (12 Mbps) design and another for USB high speed 
(480 Mbps) design?
     
  Thanking you all in anticipation
   
  Geetha


                
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