routing corners
Thanks for the reply. I still cant seem to get this rule working though... Here's a more detailed description of the steps Ive taken.
I have placed a ground plane on the bottom layer, and an adjacent plane on the top layer. I used place>polygon pour, and connected them both to AGND.
I select 'characteristic impedance driven width' in the width rule field, with a min 1ohms, preferred 50ohms, and max of 500ohms.
If i place a new track it shows up as about 1mm thick, then I hit 'TAB' to check the routing preferences, and under the 'calculated impedance' field it says -1.000ohms with an error saying this is out of range. If I change the impedance in this field, then return to routing, the track assumes the preferred width from the previous rule (normal width rule before selecting char imp driven width). Quite strange....
It is definetely set up for 'characteristic impedance driven width' but it seems to default to -1.000ohms and generate an error instead of going with the actual preferred impedance I set up.
I'm guessing this probably has something to do with my reference planes... Is placing a polygon pour the correct method for setting up the reference plane? By adjacent plane, do you mean on the same layer, or underneath on the bottom layer?
Thanks for your help, it's much appreciated.
Sam