Seems like nice module, I see that it has at least 3 variants A/B/C, could not find a good document in English what is the difference. Also seems like it has dual band SAW filters installed in B version, so additional components need to be installed in order to make it tri-band and following the re-calibration process executed.
I found one on eBay sitting on a Dev board, it is dual-band, so I will need to find a tri-band variant of the module, unless our new friend has a bunch of them readily available. On Tue, May 28, 2019 at 4:28 PM Mychaela Falconia < mychaela.falco...@gmail.com> wrote: > Hi again Songbosi, > > Thanks for the documentation - that GTM900-B module does look > interesting. Given that you've got OsmocomBB running on it, you must > have already done a fair bit of reverse engineering on this module in > order to get that far, so I hope you don't mind if I ask you to share > some of your technical findings. Let us start with a few basics: > > 1) Does this module have the Calypso boot ROM enabled via nIBOOT pin > strapping? In other words, is it possible to gain code download > access via tools like fc-loadtool or osmocon, or is JTAG the only way? > > 2) How are various GPIO and RF control signals wired? Which TSPEN > signal goes to the Rita transceiver (TSPEN2 like on most Calypso > designs, or TSPEN1 like on the Pirelli DP-L10, or other?) and which > TSPACT signal controls what? > > You also wrote on the OsmocomBB mailing list: > > > I have about 500 pcs left, I could sell them with $15/pcs > > Your price is very reasonable and I may be interested in a few to play > with, but do you have any kind of breakout board for easy > experimentation with these modules? > > M~ > _______________________________________________ > Community mailing list > Community@freecalypso.org > https://www.freecalypso.org/mailman/listinfo/community > _______________________________________________ Community mailing list Community@freecalypso.org https://www.freecalypso.org/mailman/listinfo/community
