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Cellular Phone Forum / Providers / Cingular / May 2005cell phone interfering with electronics?
I've noticed since I switched to GSM that my cell phone will cause a loud noise on my speakers and tv when the signal bar gains or loses strength. Is this normal? Is there a way to stop this from occuring? thanks > I've noticed since I switched to GSM that my cell phone will cause a loud > noise on my speakers and tv when the signal bar gains or loses strength. > Is this normal? Is there a way to stop this from occuring? > thanks Once and for all... This interference is a result of the frequencies used by GSM. If your GSM handset is near the audio device (speaker phone, stereo, mp3 player or almost anything with a speaker), you're going to get these sounds whenever the handset transmits. This occurs periodically when the handset and the cell site "handshake". That is, the cell site interrogates all handsets within range and exchanges a small amount of data. Something like (cell site) "..whomever is out there, identify yourself?". (handset) "...I'm here and available. My number is xxx-xxx-xxxx". Also, when someone calls your cellphone, the cell site broadcasts a data stream to all handsets, looking for yours. Your handset then transmits a short burst of data, identifying itself. (this is why you can sometimes tell when the cell phone is about to ring). Then the cell site sends a ringing signal and your handset rings. During the time you're talking, the handset is transmitting, so the interference continues. Generally, all GSM handsets should cause about the same amount of interference. The variables are; 1) distance between the handset and the audio device, 2) shielding of audio components inside the device being interfered with. **************************************************************************** *** > Once and for all... yep, i'm pretty sure you took care of it. i bet we never see this question again now. sorry, i thought that was funny. >> Once and for all... > > yep, i'm pretty sure you took care of it. i bet we never see this question > again now. > > sorry, i thought that was funny. I did too, that's why I copied and posted it! bamp > Once and for all... > > This interference is a result of the frequencies used by GSM. Once and for all: it actually ISN'T so much a function of the frequencies used as it is the transmission method. A GSM using TDMA as its signalling format. In layman's terms, that means the signal it broadcasts is actually a series of on-off discreet pulses in rapid succession. These pulses can cause the interference the OP is experiencing (in the form of a buzzing noise). iDEN has a similar characteristic, except the interference sounds more like a pulsed hissing noise. It utilizes different frequencies from the GSM networks in the US, but because it operates under TDMA just like GSM does, it has a similar effect. cdmaOne, 1xRTT and 1xEV-DO phones, on the other hand, DO operate under roughly the same frequencies as GSM, but the interference they cause is markedly lower (and usually unnoticeable to the user of the equipment). This is because their broadcasts are continuous, low-power, and spread over a wide spectrum band. The effects of CDMA interference is still prevalent though, and can be detected if you know exactly what to look for and catch it at the right time.  SignatureE-mail fudged to thwart spammers. Transpose the c's and a's in my e-mail address to reply. >I've noticed since I switched to GSM that my cell phone will cause a loud >noise on my speakers and tv when the signal bar gains or loses strength. Is >this normal? Is there a way to stop this from occuring? No. It's the system "talking" to your GSM phone. - - - - - - - - - - - - - - - - - - - - - - - - - - > >I've noticed since I switched to GSM that my cell phone will cause > >a loud noise on my speakers and tv when the signal bar gains or loses > >strength. Is this normal? Is there a way to stop this from occuring? > > No. It's the system "talking" to your GSM phone. Well, to be really picky, it's your GSM phone talking to the system. The system's transmitter is too far away to cause the interference. And if the OP meant that bursts of interference occur "when the signal bar gains or loses strength" even when he isn't on a call, that would be the phone negotiating a handoff from one tower to another. If that's what's happening, moving the phone to where it always has a better signal from one tower should minimize the interference. > I've noticed since I switched to GSM that my cell phone will cause a loud > noise on my speakers and tv when the signal bar gains or loses strength. Is > this normal? Is there a way to stop this from occuring? > thanks There's a good explanation in another message in this thread. It's not just GSM phones. My old AT&T Nokia 6160 TDMA phones created loud buzzes anywhere within a foot of my shielded PC speakers, clock radio or TV. My later Nokia phones don't seem to have the same problem (3285i, 3585i, 6015, 6016 & 6340i). They're all CDMA phones except for the 6340i which is a tri-band TDMA/GSM phone. Solution: move the phone or wrap it in lead foil. ;-) Chas. Call the FCC Office in your area and Complain- They will take the appropriate action and get the Interference stopped. > I've noticed since I switched to GSM that my cell phone will cause a loud > noise on my speakers and tv when the signal bar gains or loses strength. > Is this normal? Is there a way to stop this from occuring? > thanks > Call the FCC Office in your area and Complain- > > They will take the appropriate action and get the Interference stopped. Get serious, the only way to stop it is to turn the phone OFF!! The FCC will get a big laugh out of that call! bamp >> I've noticed since I switched to GSM that my cell phone will cause a loud >> noise on my speakers and tv when the signal bar gains or loses strength. >> Is this normal? Is there a way to stop this from occuring? >> thanks ROTFLMAO- >> Call the FCC Office in your area and Complain- >> [quoted text clipped - 9 lines] >>> strength. Is this normal? Is there a way to stop this from occuring? >>> thanks >Call the FCC Office in your area and Complain- > >They will take the appropriate action and get the Interference stopped. You are either ignorant or naive. >> I've noticed since I switched to GSM that my cell phone will cause a loud >> noise on my speakers and tv when the signal bar gains or loses strength. >> Is this normal? Is there a way to stop this from occuring? >> thanks - - - - - - - - - - - - - - - - - - - - - - - - - - >>Call the FCC Office in your area and Complain- >> >>They will take the appropriate action and get the Interference stopped. > > You are either ignorant or naive At least mentally challenged bamp >>> I've noticed since I switched to GSM that my cell phone will cause a >>> loud [quoted text clipped - 3 lines] > > - - - - - - - - - - - - - - - - - - - - - - - - - - |
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