why??

[Loraxxx]

why and what is in a computer that makes it go funny when it picks up my phones signal! it always makes the screen move and makes a noise.

any1 know? 

[Hippy]

When your mobile phone is at rest and switched on it puts out a "polling signal" at intervals. This maintains its presence with the system and is a relatively low power burst of radio energy.

 

When someone calls you, or you make a call, the phone emits a series of higher power bursts of radio energy in between which it receives the bursts of information from the system transmitter. If the system is calling your phone, then when it receives the "calling you" message from the system it sends back a series of "yes, I am here, and I am ringing" signals at very high power intended to counteract the phone being possibly shrouded in pocket handbag or cupboard etc. When you pick up the call the phone settles down to a more medium powered buzz that is in fact little bursts of signal to the system interweaved with little periods of listening.

 

Any other electronic equipment near the phone transmitter receives this energy. Whilst not actually tuned to the phone frequency, any conductor within the equipment will act an bit like the coils in a dynamo and some of the phone energy gets converted into an electrical signal that might interfere with the proper operation of the affected device. Audio equipment gives that rasping woodpecker on speed sound, TV or monitors get all flickery and can display horizontal bands of interference.

 

Hospital equipment is similarly affected and even the humble syringe pump has been known to go into spasm when near a phone and deliver unexpected doses. Heart monitoring equipment has to be very sensitive to pick up the tiny electrical signals from the heart muscles making it to the skin's surface. These clever gizmos are particularly prone to interference from mobile phones. Only a really selfish person keeps their phone switched on in a hospital.

 

[romko]

the electro magnetic energy emitted from the phone affects the horizontal and vertical deflection coils around the neck of the tube of the monitor (which also operate with magnetism).