Hi,
Two-part question for anyone with 1553 hardware experience.
Setup: AIM ASE1553M-2 PCIe card ↔ LEON/GR740 eval board, both transformer-coupled, single ~2m cable, no bus coupler, lab bench only.
Gaisler (the GR740 board manufacturer) confirmed their board has been used in a successful P2P 1553 connection — but didn't share what was on the other end or what cable specification was used. Encouraging, but leaves us without enough detail to just replicate it.
Part 1 — P2P viability: With no stubs and both devices transformer-coupled internally, is the coupler genuinely redundant? Or are there signal integrity concerns I should be thinking about?
Part 2 — Cable spec: We're specifying a custom cable for this (DB9 female one side, HD-DSUB15 male the other — matching the AIM card's connector). What are the things that matter most in the spec — impedance tolerance, shielding, untwisted length inside the backshell, connector grounding? What's easy to get wrong?
We have a draft spec and a drawing from a potential manufacturer. Happy to share via PM with anyone who can give meaningful feedback — can't post publicly due to IP restrictions on the drawing.
Thanks.
