Hi all,
First off, sorry I couldn't provide a better "customer experience" with solid answers on all the very on-point LTM questions tonight. I think it will definitely help to get an expert in to give a technical presentation and do some Q&A.
I did want to clarify one thing which may've been causing some confusion. We have been using the term "PC-104 connector," and if you search around for this online you will likely find the formal spec https://pc104.org/wp-content/uploads/2015/02/PC104_Spec_v2_6.pdf (from pc104.org) for the actual PC-104 connector, an ISA-derived 64 + 40 = 104-pin interface which looks like this:
The cubesat community seems to use the term "PC-104 connector" to refer to the CubeSat Kit Bus (CSKB) connector, which is 26x4 = 104 pins (two 2x26 headers next to each other), which looks like this (top of the diagram, from the AMSAT LTM Brochure):
I think this may have been the origin of some of the "it won't fit" or "the pinout isn't close" comments. Let me know if I'm on the right track.
I will be sure this is clear in the new LTM ICD.
As to where the connector is positioned, that is what I thought the Cal Poly cubesat design spec may have defined when I mentioned that in the meeting, but it looks like it had origins in Pumpkin, Inc. instead and then was more broadly adopted. I am going to do some further digging for a formal physical spec that I can point to. Meanwhile it should be easily derived from our layout files. (Or if someone on the list can answer, please speak up.)
Thanks,
Patrick
