[PCB_FORUM] Re: glossing diff pairs
- From: "Musetti, Carl" <cmusetti@xxxxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 10 Mar 2005 08:37:31 -0500
Kevin,
I have had this problem with tool ever since I have been using I am on
15.2 and it isn't any better there either the gloss routine seem to have been
left in the dust as it doesn't respect many of the high speed deign rules. I
know you don't want to hear this but for that reason any net the I put rules on
in constraint manager I put the NO_GLOSS property on. MY solution is lets put
on the top 5 issues list and get Cadence to address it as gloss is in desperate
need of a complete overhaul. Have you ever seen what it does to trace
entry/exits to pads on dense SMD devices? I tell you I could do better with a
burnt stick on a brick!
Carl
-----Original Message-----
From: Kevin McCowan [mailto:kmccowan@xxxxxxxxxxxxxx]
Sent: Thursday, March 10, 2005 8:11 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: glossing diff pairs
No. No. No.
That is not the answer I want.
Somebody else try.
And give me a solution I can use, please.
But, really, that is the conclusion I came to after
using this tool for umpteen years now.
Shouldn't this be on the list of things that need fixing?
I heard that they were going to get rid of the glosser
or something like that. I wonder if they will replace
it or make it happen in real time somehow.
Or if I am crazy.
Darn.
Kevin
Weinberg, Richard (Richard) wrote:
> I've seen this too. I don't gloss diff pairs. That's my solution.
>
> Richard Weinberg
> Agere Systems
> 207-846-4539
> -----Original Message-----
> From: Kevin McCowan [mailto:kmccowan@xxxxxxxxxxxxxx]
> Sent: Thursday, March 10, 2005 7:50 AM
> To: icu-pcb-forum@xxxxxxxxxxxxx
> Subject: [PCB_FORUM] glossing diff pairs
>
> Hey all you cadence gurus,
> This has been bugging me for some time and I thought
> "Ask the group, dummy".
> When I gloss the board it seems to have a problem
> maintaining the diff pair spacing.
> I get pairs too close together and even crossing.
> Normally I would not allow glossing of diff pairs but
> this board has a significant number of them and I
> didn't want to leave them out. Otherwise, why gloss?
> This is not new either. It seems as though this has
> been the behavior as long as I can remember.
> Has anyone else seen this and if so, what to do?
>
> 15.1 with a relatively new sr installed.
>
> Kevin McCowan
> Sr. PCB Designer
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