In order to prevent against this sort of thing, modern cell phone signal boosters will automatically reduce their capabilities or shut down completely if oscillation or feedback begins to occur. This means that a signal boosting system suffering from oscillation can actually interfere with the reception of any phone in the vicinity, regardless of the phone’s assigned network. The feedback causes interference, which results in poor reception on the phone or device being used.Įven if the signal boosting system is tuned to receive signal from just one network, the oscillation actually causes “noise” on a wide range of frequencies. The result is a background “noise”, which is the equivalent of the screech of the microphone in the audio feedback situation. Oscillation occurs when the broadcasted signal from the internal antenna gets picked back up by the external antenna, and passed through the system again, just like microphone and loudspeaker. The system works like this: the external antenna receives a signal outside the building, transmits it to the amplifier, which boosts the signal and then sends it to the internal antenna, which then broadcasts the signal to the area without signal. The consequences are different, but the same underlying principal is at work – the positive feedback loop between the output and input.Ī cell phone signal booster consists of an external antenna, an amplifier, an internal antenna, and cabling to connect that all together. Oscillation can also happen in a cell phone signal booster (also known as a repeater) system. Oscillation in a Cell Phone Signal Booster System This results in the high-pitched screech that we’re all familiar with, which gets worse as the microphone gets closer to the speaker. However, when the speaker broadcasts the sound, the microphone picks up some of this emitted sound, and it gets passed back through the system. The microphone registers the input, and transmits it to the speaker for amplification. The most well-known example is audio feedback in a system with a microphone and speaker. So What Exactly is Oscillation or Feedback?
You may well know it by its common name – “feedback”.
The phenomenon known as oscillation is something that can occur in any electronic where a positive loop exists between the system’s output and input.
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