Squintz
Senior Member
That depends on the type of modulation. For example think of your FM stereo... As you are driving through town you often get overlaping stations from different areas on the same frequency. Typically the station who has the stronger signal will be the station who frequency your radio locks on to.
So if you provide a signal then the one that is currently being transmitter by the security device then the receiver will lock onto the stronger signal and ignore the weeker signal. This has to do with different features built into the FM recevier the determine what is a signal and what is a noise and can ultimately filter out most noise and allow only the stronger signal through.
I am sure you have seen toy microphones that you can tune to a certain station and talk over your FM radio. It the same in theory. The closer you get to the antenna with the toy the better the chances are of you knocking out that radio stations signal and having your voice on the radio instead. If you had a powerful enough transmitter you could actually knock out the signal of a radio station i a large area and not just a radio siting next to you.
So I guess it depends on what type of receiver technology the device is using.
So if you provide a signal then the one that is currently being transmitter by the security device then the receiver will lock onto the stronger signal and ignore the weeker signal. This has to do with different features built into the FM recevier the determine what is a signal and what is a noise and can ultimately filter out most noise and allow only the stronger signal through.
I am sure you have seen toy microphones that you can tune to a certain station and talk over your FM radio. It the same in theory. The closer you get to the antenna with the toy the better the chances are of you knocking out that radio stations signal and having your voice on the radio instead. If you had a powerful enough transmitter you could actually knock out the signal of a radio station i a large area and not just a radio siting next to you.
So I guess it depends on what type of receiver technology the device is using.