Tom Gardner wrote:

is that the reason why when from time to time my Motorola GSM phone
pulses (not necessarily for a call) I can hear the pulse through my
computer, car radio etc? If so, that could be an issue for
instruments and radio in the aircraft if I understand this correctly.

I expect so. The GSM interference during call-setup is
"di-di-di, di-di-di, di-di-di, brrr..." duration ~2s.


I've been told that BlackBerry's are notorious for this
interference.

Can one "phone"(/device) interfere with another in this manner?

During the frequent telecons I must attend (since travel budget was
cut), we frequently hear the pesky "di-di-di--brrrr" you've described.

One might extend this conversation to the thousands of PDA's that are
semi-permanent (and unapproved?) additions to glider instrument panels
(yes, I plead guilty as charged). But perhaps only if they have
wireless (e.g. BlueTooth) capability?

For personal/work reasons, I have gravitated to PDA's without wireless
-- and similarly had to hunt for a cell phone withOUT a
camera...trying to stay non-converged (diverged?) in this convergent
world is a pain.

Remember that old saying? "Aircraft fly because of Bernoulli, not
Marconi..."

-Pete
#309