Mark,
You will need to setup a NET_SPACING_TYPE Constraint Set to handle the
Diff Pair to anything else. Basically, the Min Line Spacing value inside
of
Constraint Manager should be set below the minimum Diff Pair gap to avoid
false DRC errors between the two nets in the Diff Pair when using a
NET_SPACING_TYPE Constraint to control Diff Pair to Diff Pair spacing.
Michael Catrambone
UTStarcom, Inc.
Mark Salberg <msalberg@xxxxxxxxxxxx>@freelists.org on 02/01/2006 05:07:16
AM
Please respond to icu-pcb-forum@xxxxxxxxxxxxx
Sent by: icu-pcb-forum-bounce@xxxxxxxxxxxxx
To: icu-pcb-forum@xxxxxxxxxxxxx
cc:
Subject: [PCB_FORUM] Re: CM delta:Tolerance
Another question for the group.
How do I set up "Line-to-Line spacing" of one dif pair to anything else?
Min Line Spacing:
I tried setting MIN LINE SPACING to 20mil, but it wants this to be less
than specified gap.
I want Gap (10mil) and width (4mil) as specified, but dp to anything els
to be (20mil).
Do I have to set as NET_SPACING_TYPE?
Thanks,
Mark
Mark Salberg wrote:
Actually, I want 1500mil shorter than target as minimum length and
target length as max.
I think I will use -750:750 suggested by Daniel so my actual target
is in the middle of the spec.
Thanks for all the responses.
Mark
the specified nets to be matched to the taget length as a max and
1500mil shorter than the target as min.
Davies, Charles (cdavies) wrote:
Mark,
If you want the specified net to be 1500 mil shorter than the target,
you need to set the delta to -1500. The tolerance is then applied to
the length.
Charlie
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Salberg
Sent: Tuesday, January 31, 2006 3:38 PM
To: Cadence User Group
Subject: [PCB_FORUM] CM delta:Tolerance
Can anyone tell me the correct way to define a matched group in
Constraint Manager?
I need to match a target to "same length as target" to "-1500mil of
the target"?
I tried 0:-1500 for delta:tolerance, but it is not working right.
Thanks in advance,
Mark
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Another question for the group.
How do I set up "Line-to-Line spacing" of one dif pair to anything else?
Min Line Spacing:
I tried setting MIN LINE SPACING to 20mil, but it wants this to be
less than specified gap.
I want Gap (10mil) and width (4mil) as specified, but dp to anything
els to be (20mil).
Do I have to set as NET_SPACING_TYPE?
Thanks,
Mark
Mark Salberg wrote:
Actually, I want 1500mil shorter than target as minimum length and
target length as max.
I think I will use -750:750 suggested by Daniel so my actual target
is in the middle of the spec.
Thanks for all the responses.
Mark
the specified nets to be matched to the taget length as a max and
1500mil shorter than the target as min.
Davies, Charles (cdavies) wrote:
Mark,
If you want the specified net to be 1500 mil shorter than the target,
you need to set the delta to -1500. The tolerance is then applied to
the length.
Charlie
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Salberg
Sent: Tuesday, January 31, 2006 3:38 PM
To: Cadence User Group
Subject: [PCB_FORUM] CM delta:Tolerance
Can anyone tell me the correct way to define a matched group in
Constraint Manager?
I need to match a target to "same length as target" to "-1500mil of
the target"?
I tried 0:-1500 for delta:tolerance, but it is not working right.
Thanks in advance,
Mark
________________________________________________________________________
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