hello,
we bid and got a job to remanufacture some legacy boards out of
an old military system that has finally started to go low on spares.
several were modest two-layer boards. they had crude trace and
drill drawings to look at, but no gerbers.
i'm working on a 10-layer one now. i decided to go ahead and do
a schematic and then go to the pcb from there. so i redrew their
schematic into protel.
they show several connector pins and a test point going to ground,
which i have confirmed is a plane on the board. on a schematic, i
generally put all my connectors on the last page, and just use global
nets on the previous ones to tie in to the connectors. so i have on
the first page several nets, a test point, and a powerport ground tied
together.
my problem is that when i generate a netlist, it appears to have
decided to delete (most likely as redundant) all the nets tied to the
GND port except one. i am also troubled that i see my GND port
listed nowhere in the netlist. for that matter, i don't see my VCC
port either. instead i see a +5.3V net name that is the equivalent.
NOTE: i build my own libraries, and hardwire grounds and power
in the schematic itself.
so why don't my VCC and GND ports show up in the netlist? and
how do i get back the multiple nets tied to GND?
thank you, miker
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