Offpage connector symbols

On Thu, 21 Jan 2010 12:11:56 -0700, D Yuniskis <not.going.to.be@seen.com>=
 wrote:

>WangoTango wrote:
>> In article <hj9vf5$idp$1@speranza.aioe.org>, not.going.to.be@seen.com=20
>> says...
>>> WangoTango wrote:
>>>> In article <hj88ic$vam$2@speranza.aioe.org>, =
not.going.to.be@seen.com=20
>>>> says...
>>>>> Hi AL,
>>>>>
>>>>> LittleAlex wrote:
>>>>>> On Jan 19, 1:17 pm, D Yuniskis <not.going.to...@seen.com> wrote:
>>>>>>> As a side-comment to the schematic preferences thread
>>>>>>> (hopefully not another lengthy thread  :> ), I'm curious
>>>>>>> as to what folks use as an offpage connector symbol.
>>>>>> I use a CAD program.  It has "input", "output", "bidirectional", =
and
>>>>>> "passive" (none of the above, AKA don't care) for off-page and =
off-
>>>>>> sheet.
>>>>>>
>>>>>> I've never seen a reason to change them from the default.
>>>>> Yes, all of the tools I use do this.  I am just not happy
>>>>> with their symbol choices.  And, since I can change them,
>>>>> I have.
>>>>>
>>>>> E.g., I don't like an output on the right side of the page
>>>>> drawn as  <
>>>>>
>>>> I guess your CAD package doesn't have a rotate or flip?
>>> Sure!  Then you get a symbol that looks like > -- but now
>>> the pin connection is on the *right* side of the symbol
>>> instead of on the *left* (since this example was describing
>>> an offpage connector for an output to be located on the
>>> right edge of the page!)
>>>
>>>> Funny what these guys will forget. ;)
>>> Funny how these posters fail to think things through!  :)
>>>
>> OK, well then who makes a symbol that isn't grouped into a cohesive=20
>> unit, or what CAD package can't handle such things?
>
>Sure.  "Create a symbol".  I think if you read upthread,
>that's where this discussion started.
>
>> All in/out/bi symbols I have EVER seen are not treated as individual=20
>> parts/lines/primitives.  They are a equivalent to a symbol or part =
that=20
>> is manipulated as a unit.
>> So --->  becomes <--- when flipped or rotated.
>
>Sure!  But the PoE moves, also!
>
>Or, graphically:
>
>--->X becomes X<---
>
>where X is the PoE (i.e., where the signal connects).
>If, as I had stipulated in the discussion, you are
>creating an output for the right side of the page,
>then you really want:
>

I have not yet found a case where PoE itself was bidirectional.
Of course Ethernet itself intrinsically is.  It may be that=20
directionality being confused or conflated caused the symbol issues.

>--->X
>
>If you are starting with;
>
>---<X
>
>I think you will find "you can't get there from here".
>
>> ---< becomes >--- rotating around what would be the electrical=20
>> connection point. =20
>
>Only if that connection point is located in the *center*
>of the symbol.  (Many eCAD packages put the PoE's on
>the *edge* of the symbol boundary).
>
>> I guess I assumed you spent more than $1.50 on the software..... :)
>
>This was OrCAD 9.  I'll check Altium/Protel this afternoon
>if I get a chance.  I know STRIDES would do it correctly
>(because I could always move the PoE manually if need be).
>I *really* don't want to fire up the Mentor Graphics
>workstation to see how *that* does it...