Hello FreeCalypso community, Yesterday I gave my talk about our project at REcon Montreal; here are the slides:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/recon2017_freecalypso.pdf ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/recon2017_freecalypso.ps There should also be a video recording of my talk as well, but it will probably take a little while for the REcon team to put the videos up. I am still at the conference (today is the last day), and I am traveling back to California tomorrow (Monday). Once I get settled back at home, I will need to get back to FCDEV3B hardware issues. Some people at REcon have already expressed an interest in our boards, so we do need to produce our next batch, and likely further batches after that. We still have 20 more PCBs and enough ready-to-go parts for the next batch of 12 boards, but before I call Technotronix and give them the go-ahead to assemble that next batch, I need to resolve all of our outstanding hardware issues: * Try replacing the jumper headers at JP2 and JP3 with directly soldered-in wire jumpers and see if the sleep mode problem goes away, and if it doesn't, try upping the 0402 caps at C220 and C221 from 100 nF to 1 uF. * Have Technotronix take a look at the SIM socket on the two boards where the SIM interface doesn't work, and see if there is some issue with its soldering - I would rather have it be good from the start on the next batch. * Exercise the loudspeaker driver and microphone input circuits on our current boards, and see if they work: if it turns out that we need to change some resistor or capacitor values, I would rather find out before we assemble the next batch. It is also my strong preference to have our production RF calibration system fully complete before we assemble that next batch of FCDEV3B boards, as there is no better way to rapidly test the RF tract of a freshly assembled board than to put it through the automated calibration process for all 3 bands. In order to finish our RF calibration system (the software is almost fully done), I need to get the CMU200 itself calibrated, and it naturally makes sense to get this CMU200's main RF signal generator fixed before putting the unit through expensive calibration, so I've got my work cut out for me. Hasta la Victoria, Siempre, Mychaela aka The Mother _______________________________________________ Community mailing list [email protected] https://www.freecalypso.org/mailman/listinfo/community
