Re: gEDA-user: [pcb] terminology

[Michael Stovenour <mstovenour@xxxxxxxxx>]

Just what I needed....   an excuse to work through the documentation.  I'm close to the worst case newbie because I don't know pcb or any other layout package.  In reality I've been around PCBs and their manufacture for quite a while, I have just never been directly responsible for PCB layout.  When I designed electronics in a prevous life, we had a PCB designner that did all the layout.  If I get annoying just smack me.
 
The last sentence in the definition of annulus seems ambiguous:
           annulus
               The donut-shaped ring of copper that surrounds the hole of a pin or via. Note 
               that in pcb, the size of a pin or via is the overall diameter of the annulus, not 
               the distance from the outer edge of the hole to the outer edge of the annulus. 
               However, if we refer specifically to the size of the annulus, we mean that distance. 
I'm not sure "which" distance the last sentence refers, "overall diameter" or "distance from the outer edge to the hole to the outer edge of the annulus"
 
In the definition of netlist, I think that the last sentence is ambiguous; at best it is a huge oversimplification:
           netlist
               A list if symbolic electrical connections, normally provided as input to pcb 
               from a schematic layout program, which represents the desired electrical 
               connectivity of the board. When the netlist and the board agree, the board 
               is done.
The simplest thing to do is remove the sentence.  In reality there are too many attributes to list of a board that is "done".  This might also be referring to the condition where all the rats defined by the netlist are represented by traces.  If that is the case then maybe it would be better to say something about how "board layout is the process of placing traces in the layout that represent the rats in the netlist"  And "a board is not complete until all the rats defined in the netlist are represented by traces in the layout"

BTW, I found reading the terminology an excellent way to add clarity to the conversations on the mail list.  However, I doubt that it will make me sound any smarter as I post a comments since that will require more than a good vocabulary  8^)


----- Original Message ----
From: DJ Delorie <dj@xxxxxxxxxxx>
To: geda-user@xxxxxxxxxxxxxx
Sent: Saturday, November 24, 2007 11:23:32 PM
Subject: gEDA-user: [pcb] terminology


I worked on the terminology section of the getting started doc.  If
some of the newer PCB users could review it and see if I've missed
anything (i.e. terms I'm so used to that I don't know they need
defining), let me know.

http://www.delorie.com/pcb/docs/gs/


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