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11:59 | Bertl | morning everyone!
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14:29 | dmj_nova | morning Bertl
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14:29 | dmj_nova | should be back this evening
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14:29 | Bertl | hey, how's going?
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14:31 | Bertl | here is my proposal for the first CMV12k adapter (in case you're interested): http://vserver.13thfloor.at/Stuff/AXIOM/qad-center-xx.png
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14:32 | Bertl | (note: I only routed the LVDS lines so far)
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14:33 | dmj_nova | Are you planning to route more?
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14:34 | Bertl | well, if that's the way we want to go, yes
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14:34 | Bertl | it has a bunch of advantages over the current plans
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14:35 | Bertl | it is statically defined, works on simple 4layer, doesn't need extra power supply or LDO
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14:36 | Bertl | and it even allows to attach the LensMount once it's available
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14:36 | dmj_nova | what were the current plans?
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14:37 | Bertl | https://github.com/apertus-open-source-cinema/alpha-hardware/tree/master/SFE-PCB
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14:38 | Bertl | check the 'power-planes01.jpg' it gives an idea
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14:38 | Bertl | for the sch/pcb you'll need expresspcb
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14:39 | Bertl | the fmc is on the left, the sensor on the right
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14:41 | dmj_nova | Ah, so you're thinking two PCBs
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14:41 | dmj_nova | one behind the other
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14:41 | Bertl | no, the one I propose is a single 4 layer pcb
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14:41 | Bertl | (motto: keep it simple)
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14:43 | Bertl | the FMC is on the other side of the CMV12k socket, which is the thru-hole version
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15:36 | Bertl | dmj_nova: so, what do you think?
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17:42 | dmj_nova | Bertl: So basically you're reducing the complexity by using additional layers
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17:42 | Bertl | hmm, no, it's 4layer, same as planned
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17:43 | Bertl | it's just optimized in the way how it is connected
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17:44 | dmj_nova | ah, okay
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17:46 | Bertl | i.e. you need a lot more 'wire' if you put the CMV12k on the side
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17:48 | dmj_nova | I see, you're reducing all that by mounting the FMC right behind the sensor
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17:49 | Bertl | precisely, and by reordering the LVDS pairs so that they perfectly align
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17:51 | dmj_nova | hmm...will this make cooling an issue?
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17:53 | Bertl | I don't think so, we can (and should) have a nice ground plane directly below the sensor
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18:08 | Bertl | btw, I haven't found any indication that cooling would be a problem, but we'll see in the prototype I guess
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21:41 | dmj_nova | Bertl: Yeah, I don't really know for sure
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21:42 | Bertl | btw, I just finished my PMOD debug plug, wanna see?
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21:42 | dmj_nova | Sebastian had commented about the noise floor being worse at higher temperatures
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21:42 | dmj_nova | sure
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21:45 | Bertl | http://vserver.13thfloor.at/Stuff/AXIOM/pmod_debug.png
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