Hi Brad,
While I don't completely disagree with you. I have more sympathy for the
poor techs troubleshooting a pcb than the ring-wraiths seating in
developement meetings.
When looking for a part on a pcb, its far more practical to have the pcb
annotation in order. Schematic sheets are usually drawn in modules, so if
you know C23 is in the feedback of a high pass filter, you might try looking
on the filter schematic sheet. Of course, this is just my humble opinion.
Ring-wraiths - (Canadian term) - Engineers in Canada wear iron rings on
their working hands. It's symbolic and it matches the lobotomy scars!
Lloyd Good
Engineering Systems Co-ordinator
GE Harris Energy Control Systems Canada Inc.
2728 Hopewell Place NE
Calgary, AB, Canada T1Y 7J7
* +1 (403) 214-4777
* +1 (403) 287-7946
-----Original Message-----
From: Brad Velander [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 05, 2001 12:40 PM
To: 'Protel EDA Forum'
Subject: Re: [PEDA] :Positional re-annotation
Lloyd,
come on, don't tell me that I am wrong because I have the schematics
which would prove that I am not wrong. Some components which I entered near
the end of the schematic entry are ordered exactly as I would have expected
from the "Re-annotate Method". I would note that the "Re-annotate Method" is
a bit of a misnomer because it works for the initial annotation as well.
If you do not specify the order of the annotation your comment could
be perfectly correct. But if you do specify the order of the annotation, the
annotation generally follows this order but there are some aberrations. On
my B size schematics which was annotated using "3 Across then up", I can
extrapolate approx. 4 horizontal bands that the annotation followed from
bottom to top, left to right. These bands are hazy because of either the
hidden fields which may protrude into a band other then the band of the
actual component or possibly the component is oriented with the origin at
the top or bottom, left or right.
As for a reason, when starting the PCB I personally like having some
method of finding the components on the schematic in an orderly numerical
fashion. Just the same as at the completion of the PCB some people want the
designators re-ordered in a positional manner to the PCB locations. For
general discussions in meetings someone mentions C23, where the hell is C23?
I like finding it somewhere close to C22, C24, a little farther away from
C26, etc. Otherwise sometimes you can spend 5 minutes searching your
multipage schematic just to make sure everyone knows which cap is C23 before
the discussion can continue.
Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 05, 2001 10:19 AM
> To: Protel EDA Forum
> Subject: Re: [PEDA] :Positional re-annotation
>
>
> Ivan,
> You would be correct. The annotation in schematic has nothing
> to do with
> position. It is indeed related to order of placement. This practice is
> consistent in 99SE as is was in Client 3.x. My question is
> why would you
> care what order the annotation is in schematic anyway? The
> back annotate
> feature works from re-annotating the pcb then back annotating
> the schematic,
> not the other way around.
> Regards,
>
> Lloyd Good
> Engineering Systems Co-ordinator
> GE Harris Energy Control Systems Canada Inc.
> 2728 Hopewell Place NE
> Calgary, AB, Canada T1Y 7J7
> * +1 (403) 214-4777
> * +1 (403) 287-7946
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/subscrib.html
* - or email -
* mailto:[EMAIL PROTECTED]?body=leave%20proteledaforum
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Browse or Search previous postings:
* http://www.mail-archive.com/[email protected]
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
