Current Server Time: 19:23 (Central Europe)

#apertus IRC Channel Logs

2013/07/06

Timezone: UTC


23:01
jucar
joined the channel
23:02
jucar1
left the channel
04:44
jucar1
joined the channel
04:45
jucar
left the channel
05:53
jucar
joined the channel
05:55
jucar1
left the channel
06:01
dmj_nova
left the channel
06:42
dmj_nova
joined the channel
12:59
Bertl
morning everyone!
15:29
dmj_nova
morning Bertl
15:29
dmj_nova
should be back this evening
15:29
Bertl
hey, how's going?
15:31
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
15:32
Bertl
(note: I only routed the LVDS lines so far)
15:33
dmj_nova
Are you planning to route more?
15:34
Bertl
well, if that's the way we want to go, yes
15:34
Bertl
it has a bunch of advantages over the current plans
15:35
Bertl
it is statically defined, works on simple 4layer, doesn't need extra power supply or LDO
15:36
Bertl
and it even allows to attach the LensMount once it's available
15:36
dmj_nova
what were the current plans?
15:37
Bertl
https://github.com/apertus-open-source-cinema/alpha-hardware/tree/master/SFE-PCB
15:38
Bertl
check the 'power-planes01.jpg' it gives an idea
15:38
Bertl
for the sch/pcb you'll need expresspcb
15:39
Bertl
the fmc is on the left, the sensor on the right
15:41
dmj_nova
Ah, so you're thinking two PCBs
15:41
dmj_nova
one behind the other
15:41
Bertl
no, the one I propose is a single 4 layer pcb
15:41
Bertl
(motto: keep it simple)
15:43
Bertl
the FMC is on the other side of the CMV12k socket, which is the thru-hole version
16:36
Bertl
dmj_nova: so, what do you think?
18:42
dmj_nova
Bertl: So basically you're reducing the complexity by using additional layers
18:42
Bertl
hmm, no, it's 4layer, same as planned
18:43
Bertl
it's just optimized in the way how it is connected
18:44
dmj_nova
ah, okay
18:46
Bertl
i.e. you need a lot more 'wire' if you put the CMV12k on the side
18:48
dmj_nova
I see, you're reducing all that by mounting the FMC right behind the sensor
18:49
Bertl
precisely, and by reordering the LVDS pairs so that they perfectly align
18:51
dmj_nova
hmm...will this make cooling an issue?
18:53
Bertl
I don't think so, we can (and should) have a nice ground plane directly below the sensor
19:08
Bertl
btw, I haven't found any indication that cooling would be a problem, but we'll see in the prototype I guess
22:41
dmj_nova
Bertl: Yeah, I don't really know for sure
22:42
Bertl
btw, I just finished my PMOD debug plug, wanna see?
22:42
dmj_nova
Sebastian had commented about the noise floor being worse at higher temperatures
22:42
dmj_nova
sure
22:45
Bertl
http://vserver.13thfloor.at/Stuff/AXIOM/pmod_debug.png