I've Sennheiser wireless microphone, that has option
Pilot mode and "Squelch".
I have read here :
An FM receiver generates a high level of broadband noise when it's not receiving a signal...enough noise to be unpleasant to listen to and possibly damage speakers. To circumvent this, a squelch circuit is generally incorporated. At the simplest, this turns off the receiver output when a certainly level of signal is not being picked up. However, this form of squelch can be fooled into unmuting when an interfering signal is picked up.
About PILOT MODE:
A better system to handle the squelch is a high-frequency pilot tone to the transmitter signal. The receiver checks incoming signals to see if the pilot tone is present.If not, the receiver assumes that the signal is not from its own transmitter and keeps the receiver muted even if the interfering signal is very strong. This form of squelch is generally referred to as "pilot tone" or "tone coded" squelch.
i will always ENABLE that option...
1) Why "Pilot mode" even exists, as noone wish to disable that feature?
2) does that consume battery much?