Yes, but the whole copper plane is not filled with copper, or is it (ie. it is not like a solid filled rectangle in a paint program)?
So the copper in the copper plane forms some islands/blobs or maybe better said some kind of trace maze. And I was wondering if on pcbs there is always just one single such trace maze/labyrinth (where you can get from every possible point in the maze to every other possible point on the maze) or whether there can be multiple ones which are not connected by themselves (no way to get from a point on maze #1 to a point from maze #2 because they are not connected). And it's only the installation of some pcb component which later will causes the mazes to be bridged, so that they end up being connected.
stupid example: if you had a circuit with a lamp and a fuse on the negative side then as long as the circuit is unpopulated then it would look like the ground connection from DC In to lamp ground pin is missing.
well. more or less it IS a copperplate (with areas missing around vias (holes) that shuld not be connected to ground.. you do not bridge via other components (the lampexample) as then you put a lot of stress on that component.
However in the BPPC example, this is also not the design (bridge needed) as my video show: the old board with all components removed shows perfect groundplane where the new pcb show no signal whatsoever.
What you do in the cad sofrtware is to design a area, and tell it to fill this area totally. but if a component is placed there (like a hole conneting other layers) then it automatically makes a small area without copper around that hole.
so . either he simply forgot to send the gerberfile with the groundplane data, or when importting/exporting data between software (to move it to more modern software) this information did not come with it..
OR. he never connected the vias (holes connecting different planes/layers) to GND, meaning the software simply removed the copper around those holes INSTEAD of actually letting it be there. connecting that pin to ground.
and well. as told. as haven't been able to send 2 new working PCBs or even showiung the world thath there is a GND on new boards. my guess is: THERE IS NONE! and never was. as it would not require much to show this.
if he show this in a week or 2. well then it just shows that he made a new pcb order (propably a small one) based on my information.
