I can only help you with question #1.
Go to Design > Layer Stack Manager.
Select the Cores & Prepregs and hit Properties.
You can adjust your er values and thicknesses there.

Regards,
Steve Smith, C.I.D.
Product Engineer
Staco Energy Products Co.
Web Site: www.stacoenergy.com
& www.stacopower.com


-----Original Message-----
From: Kenneth Henrich [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, October 15, 2003 3:25 PM
To: 'Protel EDA Forum'
Subject: [PEDA] signal integrety


Hi,

I've been a lurker for many years. My needs have been modest. However, I'm starting to 
do high speed and RF boards. I noticed that there are signal integrity DRC's. The 
first one I'm interested in is the characteristic impedance. I do not understand how 
Protel 99SE calculates impedance.

1. I do not see where to enter the er and thickness of layers. 2. I do not know how or 
what equations are used.

Can someone enlighten me?

Thanks
Ken


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