<Joerg-Neo900>
I'm not sure, but it doesn't matter in the end. PCB house gets picked according to what PCB grade we need (precision, resolution, vias etc)
<Joerg-Neo900>
you build the PCB as "low tech" as possible (don't use sophiosticated stuff like stacked microvias, microtraces etc if not necessary), then when the layout is clear you find a PCB house that can do what you need
<houkime>
ok I guess for material -dependent calculations i will need to deduce a material that doesn't break the work that is already done.
<houkime>
and this time i will make documentation so that stuff never happens again.
<Joerg-Neo900>
sounds good. Actual impedance-matched lines are done by the PCB house afaik
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<houkime>
(now I do really want open silicon. Ideally self-made. Gonna sleep)
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<Joerg-Neo900>
February 19 2015
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<Joerg-Neo900>
iirc what been stolen were the hidden pubkeys used to answer a auth challenge during log in, aka the Ki
<Joerg-Neo900>
leaving the SIM cards that were involved vulnerable to cloning
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<houkime>
Actually now that I'm thinking about it, the most realistic solution would be to place a baseband processor on an FPGA.
<houkime>
FPGA should really eliminate all realisitical possibilities of silicon exploits, because no man can predict what you put in there beforehand.
<houkime>
So all one needs is to help osmocomm guys to hack gsm and then reimplement it as a design to load into FPGA.
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<houkime>
Ok, I investigated situation with rf taps.
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<houkime>
Am i right that v2 will use U.FL SMT HIROSE connectors as taps like in v1?
<houkime>
and that i can borrow the footprints for them from tested v1 design?
<DocScrutinizer51>
yes, Hirose sounds good and U.FL mifgt be correct
<DocScrutinizer51>
they*
<DocScrutinizer51>
teay wre in V1 right
<houkime>
the thing is that on v2 schematic there are 2 signal pins (and 2 gnd) for a tap.
<houkime>
so schematics needs to be updated for Hirose usage (correct pin names and such)?
<houkime>
schematics indicate 2 unnamed pins (inout), but hirose uses only one (and 2 GND)
<houkime>
v1 schematics is correct in this regard.
<DocScrutinizer51>
I guess that's the reason. We need jack with switch (in-out)
<houkime>
ok, there's another jack in v1 and it has in-out.
<DocScrutinizer51>
prolly nobody found / searched a matching component
<houkime>
it is a murata one
<houkime>
but murata has 4 GND pins
<houkime>
MM8430-2600RA1
<houkime>
in v1 there was no jacks with switches on GNSS line, just hirose's but in v2 they should be with switches?
<DocScrutinizer51>
do you understand the purpose of the jack? either internal or attached 'antenna'
<DocScrutinizer51>
sorry Im on mobile so can't search right now
<DocScrutinizer51>
please choose an appropriate component
<DocScrutinizer51>
yes
<DocScrutinizer51>
some shall
<houkime>
can you please be more specific? on v2 schematics all taps are identical.
<DocScrutinizer51>
or even all, cant tell right now
<DocScrutinizer51>
sorry I suffer disconnects here
<houkime>
ok
<DocScrutinizer51>
sorry not now, I don't have access to schematics now
<DocScrutinizer51>
use switched everywhere, optimaze later ;)
<houkime>
ok, will try
<DocScrutinizer51>
ta
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<Joerg-Neo900>
yes, for v2 we decided to sue switched ones everywhere
<Joerg-Neo900>
houkime: I can't find MM8430-2600RA1