Mediatek MT6235 status (Sciphone G2)

Harald Welte laforge at
Fri Feb 18 12:23:04 UTC 2011


On Fri, Feb 18, 2011 at 12:46:23PM +0200, Marcin.Mielczarczyk at wrote:

> > If anyone else feels interested to dive into it, feel free to do so.
> > Especially the RF transceiver driver, TDMA timer driver, etc. should all be
> > possible to develop right now based on the documentation that is available.
> I'm gonna dive into this topic.
> That's something where I don't have experience so it'll take me some time to
> understand it, but it's worth effort.

I'm happy to hear this.  The problem sort-of is:  Do you have the kind of
measurement equipment to facilitate that kind of development?  In order to
e.g. test the VCO/PLL / Transmit code, you would have to have something like
a spectrum analyzer or a scope that can go up to at least the GSM900, preferrably
up into 1800/1900 MHz.

If you want to test the receive side, something like a GSM signal generator (HP
8922, Racal 6103, R&S CMD 55) would be great, as they can transmit a well-known
bit pattern (all-1, all-0, 101010101010 and the like) on a configured ARFCN,
then configure the RF Transceiver (MT61400 and you can watch the analog
baseband signal on an oscilloscope and determine if it mathes the expected singal.

- Harald Welte <laforge at> 
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

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