ole-om-lists-2008 at mail.plastictree.net
Tue Aug 5 16:06:11 CEST 2008
On Tue, Aug 05, 2008 at 07:49:51PM +0800, Joerg Reisenweber wrote:
> Am Di 5. August 2008 schrieb Jeffrey Ratcliffe:
> > 2008/8/5 Andy Green <andy at openmoko.com>:
> > > Like Ole says when I started looking at it, by calling a landline in the
> > > same room and listening to its receiver lying on the desk, it varied
> > > tremendously and not in a repeatable way. Eg, it appeared to vary by
> > > orientation of the phone, but when I traced the path backwards, the buzz
> > > did not return.
> > OK. Confirming this - the buzzing seems to come and go in waves of
> > varying frequency. Even without touching the phone, the buzzing just
> > comes and goes.
> I noticed the buzz come and go in discrete steps. I guess that's basestation
> sending PCF commands to mobile, to level up/down the TX-power.
> BS decides on this depending on signal-quality of MS as BS sees it.
> It would be *very* helpful to confirm this, by using some RF-meter (e.g.
> microwave leakage tester?), and/or reading the battery current, while
> observing the noise come and go-
I can only observe: I did this test some weeks ago at my home. The FR
has signaficantly better signal when held out of the window.
When holding out of the window during a call, it takes a short moment
then buzzing disappears quite suddenly. Going back into the room again
after a moment the buzzing returns suddenly.
So it comes and goes in discrete steps and it lags behind the change of
BTW: Not that I would know anything about these things. But would it be
possible to lower the TX-power of the FR to see how far down you can go
without loosing connection?
I have active speakers in my room that catch GSM signals. I noticed
several times that the noise in the speakers when the phone is
registering is louder with the FR than with a Motorola V3x with the same
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 197 bytes
Desc: not available
Url : http://lists.openmoko.org/pipermail/support/attachments/20080805/eef5d371/attachment.pgp
More information about the support