[PCB_FORUM] Re: Using an "Electrical CSET" vs a "Constraint Set" for diff pairs...
- From: "Gerry Meier" <gerry.meier@xxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Wed, 26 Mar 2008 12:56:25 -0700
Austin,
Yes the world changes with 16.xx they have implemented net_classes. It
looks really slick much more configurable can't wait to get in there and
start hacking away.
Gerry
Gerry Meier, Sr. PCB Designer
Freedom CAD Services. Inc
Voice: (256)776-7470 or (603) 864-1350
Email:gerry.meier@xxxxxxxxxxxxxx
visit us at http://www.freedomcad.com
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Austin Franklin
Sent: Wednesday, March 26, 2008 3:47 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Using an "Electrical CSET" vs a "Constraint
Set" for diff pairs...
Hi Gerry,
It looks like the break is between 15.7 and 16.xx when they "updated"
this
to allow CM to do this on a layer by layer basis (or to be able to
assign
physical constraints in CM)?
Regards,
Austin
> -----Original Message-----
> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of Gerry Meier
> Sent: Wednesday, March 26, 2008 2:14 PM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: Using an "Electrical CSET" vs a "Constraint
> Set" for diff pairs...
>
>
> If you have different line widths and gaps you "Must use physical
> constraint set" as CM does not have the ability to assign different
> parameters on a layer by layer basis. This al changes in Version 16.xx
>
> Gerry Meier, Sr. PCB Designer
> Freedom CAD Services. Inc
> Voice: (256)776-7470 or (603) 864-1350
> Email:gerry.meier@xxxxxxxxxxxxxx
> visit us at http://www.freedomcad.com
>
>
>
> -----Original Message-----
> From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Austin
Franklin
> Sent: Wednesday, March 26, 2008 3:05 PM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] Re: Using an "Electrical CSET" vs a "Constraint
> Set" for diff pairs...
>
> Hi George,
>
> I loaded 15.7, and don't see it any different than in 15.2. Unless I
> missed
> something...but the spreadsheet only allows me to use "Electrical
> Constraint
> Sets", not any of the "Constraint Sets" that are setup in
> "Physical(Lines/Vias) Rule Set" "Set values...".
>
> Best Regards,
>
> Austin
>
> > -----Original Message-----
> > From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> > [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of
> > george.h.patrick@xxxxxxxxxxxxx
> > Sent: Wednesday, March 26, 2008 1:06 PM
> > To: icu-pcb-forum@xxxxxxxxxxxxx
> > Subject: [PCB_FORUM] Re: Using an "Electrical CSET" vs a "Constraint
> > Set" for diff pairs...
> >
> >
> >
> > This was addressed in 15.5 (if I remember correctly)
> >
> > --
> > George Patrick
> > Tektronix, Inc.
> > Central Engineering, EDS Applications Support
> > P.O. Box 500, M/S 39-512
> > Beaverton, OR 97077-0001
> > * 503-627-5272 (voice) * 503-627-5587 (fax)
> > http://www.tektronix.com http://www.pcb-designer.com
> >
> > "Off-Grid and Proud of it!"
> >
> >
> > -----Original Message-----
> > From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
> > [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Austin
> Franklin
> > Sent: Wednesday, March 26, 2008 11:39
> > To: icu-pcb-forum@xxxxxxxxxxxxx
> > Subject: [PCB_FORUM] Using an "Electrical CSET" vs a "Constraint
Set"
> > for diff pairs...
> >
> >
> > Hi,
> >
> > There appear to be two ways to get the diff pair spacing and gap,
but
> > only
> > one allows differing them by layer. Setting up an "Electrical CSET"
> > only
> > seems to allow one overall (as in for all layers) space/gap. But,
the
> > advantage of using the ECSET is you can assign it to a net or
multiple
> > nets
> > using the Constraints Manager spreadsheet using a pulldown menu.
> >
> > Or, I can setup a "Constraint Set" and select each layer's
> > space/gap...but I
> > then have to attach this as a property to each and every net
manually
> by
> > selecting the nets and attaching this Constraint Set name as a
> > NET_PHYSICAL_TYPE attribute.
> >
> > I prefer the Constraint Set, since it gives me the per layer
> > control...but
> > the thing that seems to be missing, is the ability to assign a given
> > Constraint Set to the nets using the Constraint Manager spreadsheet.
> >
> > I'm on 15.2. Am I missing something? If not, has this improved on
> 15.7
> > or
> > 16?
> >
> > Regards,
> >
> > Austin
> >
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