Sennheiser EK3253 - Manual (Page 32)

34
Squelch
Pilot tone squelch
When set to stereo operation, the transmitter adds a 19-kHz
pilot tone to the audio signal. The receiver checks incoming
audio signals to see if the pilot tone is present. In the absence
of the 19-kHz signal, the receiver’s audio output will remain
muted, even if a strong RF signal is present.
This prevents strong interfering signals from causing hissing
noise in the receiver when the transmitter is switched off.
Field strength-dependent squelch
Depending on the strength of the received RF signal, the
receiver’s audio output is opened or muted. Via the “
SQELCH ”
menu of the receiver, the squelch threshold can be adjusted in
three steps (LO, MID, HI).