[PCB_FORUM] Re: Prop Delay question....

Well, if those properties are attached to the net it should.
Check with the property command and make sure those are
attached. I have never seen a problem with this.
I am on 15.1 with a recent sr installed.

Kevin

Gene Carman wrote:
Actually it was list element < NET >, but my list element < NET > reports do 
not contain this:

Properties attached to net

   CLASS             = CPU_CLK
   NET_SPACING_TYPE  = CLOCK
   NO_GLOSS
   MANUAL_ROUTES
   PROPAGATION_DELAY = AD:AR:2000 MIL:2500 MIL


Especially the last one  "PROPAGATION_DELAY"

-----Original Message-----
From: Kevin McCowan [mailto:kmccowan@xxxxxxxxxxxxxx]
Sent: Thursday, March 03, 2005 7:41 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Prop Delay question....


They were generated using list element (it says so at the top of the listing). You seem to want something other than that. Have you checked reports? I have specctra running right now and cannot do it myself.

Kevin McCowan
Sr. PCB Designer
TSI Telsys

Gene Carman wrote:

Is there a simple way to get a prop delay report in 15.2... I have an engineer that wants the capacitance and prop delay on address and data lines and frankly I have not read the manual on this section.

How was the report below generated.

Thanks


-----Original Message----- From: Dave Seymour [mailto:deseymour-pcb@xxxxxxxxxxxxx] Sent: Wednesday, March 02, 2005 2:58 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Prop Delay not seeing all the net


15.2

Anyone know why a DRC is generated when the entire
net length is correct?


The net length is supposed to be between 2000 and 2500 mils.

Probing the net gives --->Total Etch Length: 2280.31 MIL. Very good.

When the DRC is probed, only a portion of the net is reported.
Actual value:     1032.65 MIL
Very Bad.

What up with that?

I did check the box for in the user setup for pre 11.x checking.

Thanks for the help.
dave

LISTING: 1 element(s)

             < NET >

 Net Name:       CPU_CLK6

 Via Count:              3
 Total Etch Length:      2280.31 MIL
 Total Manhattan Length: 2257.7 MIL
 Percent Manhattan:      101.00%

 Pin                     Type      SigNoise Model
 ---                     ----      --------------
 R93.2                   BI        CDSDefaultIO
 J5.A13                  BI        CDSDefaultIO
 U4.27                   IN        CDSDefaultInput

 No connections remaining

 Properties attached to net
   CLASS             = CPU_CLK
   NET_SPACING_TYPE  = CLOCK
   NO_GLOSS
   MANUAL_ROUTES
   PROPAGATION_DELAY = AD:AR:2000 MIL:2500 MIL



LISTING: 1 element(s)

          < DRC ERROR >

 Class:           DRC ERROR CLASS
 Subclass:        ALL
 Origin xy:       (2083.30 -790.00)

 CONSTRAINT:      Propagation Delay
 CONSTRAINT SET:  PROPAGATION_DELAY
 CONSTRAINT TYPE: ATTRIBUTE
   Constraint value: AD:AR:2000 MIL:2500 MIL
   Actual value:     1032.65 MIL


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