Radio interference w/ cell phone

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Old 06-19-2002 | 01:35 AM
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Radio interference w/ cell phone

I noticed today as I was driving and talking on my cell phone (dumb idea) that my phone interfered with my radio. So I held it closer and static came over the radio. Just wondering if anyone else experienced this and if there was anything I could do?
Old 06-19-2002 | 02:10 AM
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Re: Radio interference w/ cell phone

Originally posted by Zootking
I noticed today as I was driving and talking on my cell phone (dumb idea) that my phone interfered with my radio. So I held it closer and static came over the radio. Just wondering if anyone else experienced this and if there was anything I could do?
I have the same problem as you. Don't know a fix for that except to talk with the phone on my left hand instead.
Old 06-19-2002 | 03:25 AM
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it's normal.
Old 06-19-2002 | 03:36 AM
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alwayshaappens
Old 06-19-2002 | 10:01 AM
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had the same problem w/ my nokia (voicestream) and didn't know what was making the radio buzz (thought it was my new amp and was pretty upset) but then figured it out.

i dropped voicestream for other reasons and got the sprint LG phone...no interference at all...i think it has either better shielding or uses different transmission technology...not too well veresed in the topic...

just keep your phone in the door (the little tray-thingy) and it shouldn't interfere too much..
Old 06-19-2002 | 10:07 AM
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It has to do with your mobile technology. I know that CDMA cellular phones project less interference then GSM PCS phones, for instance. I don't remember the details on each though.

Bottom line, mobile phones are radios, and sometimes they interfere with other radios (or TVs).
Old 06-19-2002 | 10:47 AM
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This is a common situation called saturation. I described this a couple of weeks ago in realtion to valses on the V1, but no one here wanted to believe me. Any RF emitting device saturates all bands when you are close to the source. As you know cell frequency and FM radio frequncy are no where near each other. However, the RF saturation the cell phone gives off interfears with the radio. Move the cell phone 5 feet further away from the radio and it won't happen. Why, because the saturation remains with the cell phone as you move it further away. Also, cell phones do not have a strong transmission signal. Key up a 25 watt CB radio next to your car radio and see what happens!
Old 06-19-2002 | 01:01 PM
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You will find this interferece more apparent on the cellphones of the TDMA and GSM variety (i.e. ATT, Voicestream, Cingular) and less apparent to non-existant on the CDMA phones (Sprint, Verizon, Alltel). You can almost predict when a call is about to ring your TDMA phone, just right before the phone rings, the base station is calling your mobile on the paging changing and the interference is felt in your radio; then all of a sudden the phone responds (rings).
Old 06-19-2002 | 01:09 PM
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Originally posted by kensteele
You will find this interferece more apparent on the cellphones of the TDMA and GSM variety (i.e. ATT, Voicestream, Cingular) and less apparent to non-existant on the CDMA phones (Sprint, Verizon, Alltel). You can almost predict when a call is about to ring your TDMA phone, just right before the phone rings, the base station is calling your mobile on the paging changing and the interference is felt in your radio; then all of a sudden the phone responds (rings).
Hehe, Ken are you trying to market Sprint here?? I sense a little bias
Old 06-19-2002 | 01:16 PM
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Originally posted by bone_stock
This is a common situation called saturation. I described this a couple of weeks ago in realtion to valses on the V1, but no one here wanted to believe me. Any RF emitting device saturates all bands when you are close to the source. As you know cell frequency and FM radio frequncy are no where near each other. However, the RF saturation the cell phone gives off interfears with the radio. Move the cell phone 5 feet further away from the radio and it won't happen. Why, because the saturation remains with the cell phone as you move it further away. Also, cell phones do not have a strong transmission signal. Key up a 25 watt CB radio next to your car radio and see what happens!
Just as long as you don't try the radar analogy again...

I haven't noticed this with my AT&T service... Although, i do know it happens...
Old 06-19-2002 | 03:40 PM
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Originally posted by Scrib


Just as long as you don't try the radar analogy again...

I haven't noticed this with my AT&T service... Although, i do know it happens...
Really, that's odd I have AT&T wireless and I hear it happen with my Erricson. Maybe it's the individual phones themselves and not the frequency used? Since you mentioned the radar analogy I have another saturation example for you. When I get my V1's antenna near (less than a foot) the navi screen it gives a full laser alert. How's that for near saturation?
Old 06-19-2002 | 03:50 PM
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When I had my Nextel and the radio on, I could tell when a call was about to come. There would be static and a tick, tick, tick noise. Then the phone would ring.
Old 06-19-2002 | 04:06 PM
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From: Tick-Tock Tech
Originally posted by bone_stock
Really, that's odd I have AT&T wireless and I hear it happen with my Erricson. Maybe it's the individual phones themselves and not the frequency used...
No. As kensteele said - it is a product of the chip technology (CDMA vs. TDMA vs. GSM, etc.) and frequency (pcs vs celluar) that the phone uses. I have a very close friend (ie sibling) that was on the forefront of developing CDMA for a very large company in San Diego. She used to laugh and laugh at various international colleagues that used 'inferior' technology that would interfere with their hotel tv's and radios.
Old 06-19-2002 | 04:19 PM
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YEAH, MAJOR STATIC WITH MY PHONE AS WELL= VOICESTREAM. I USUALLY HEAR STATIC AND THEN MY PHONE RINGS. ITS KINDA FUNNY ACTUALLY.
Old 06-19-2002 | 04:25 PM
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CDMA = the only 'real' digital technology
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