Bare-board electrical test with moving needles; no fixture, fine for prototypes. EasyEDA exports FlyingProbeTesting.json for it.
How it looks
Real geometry with illustrated probes
Real CORE3588 copper (one net in amber) with two illustrated probes. Our fab notes ask PCB Power for this test ("Electrical test: yes") using the IPC-D-356 file we send.
1Probe 1 touches one end of the PERIPH_3V3 net...
2...probe 2 touches a far end. Copper between them must conduct; to every other net, it must not.
How it works
Where it fits
Flying probe checks the bare PCB before assembly; bring-up checks the assembled board later.