GSM-noise "buzz" issue
wiederling at googlemail.com
Sun Sep 21 15:36:39 CEST 2008
On 9/21/08, Werner Almesberger <werner at openmoko.org> wrote:
> Andy Green wrote:
> > One interesting thing would be stick a tracking generator on the GSM
> > antenna, put it near the headphone socket in a repeatable way, stick
> > spectrum analyzer probe on the victim net, and sweep them to get a
> > display of coupling efficiency vs frequency.
> Do you think this will work ? I thought of using a tracking generator
> when I wrote that mail lamenting that Joerg didn't have a signal
> source, but then I realized that almost all tracking generators have
> their maximum output at about 0dBm, while our troublemaker should be
> more like 30dBm.
I had thought about using the FR as an energy sink.
Using a 4pole networkanalyzer and a pair of antenna
in a grid dip meter style arrangement.
This should indicate all absorbtive elements.
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