Additional Information - Sennheiser SR 3254 Instructions For Use Manual

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Additional information

HDX noise reduction
Transmitter
Progress you can hear:
The product family is equipped with HDX, the Sennheiser noise
reduction system that reduces RF interference. It increases the
signal-to-noise ratio in wireless audio transmission to more
than 90 dB.
HDX is a wideband compander system which compresses the
audio signal in the transmitter in a 2:1 ratio (related to dB) to
lift it above the inherent noise floor of the RF link. In the receiver
the signal is expanded in an identical and opposite way in a 1:2
ratio to restore the original signal, at the same time reducing
the RF noise to below the noise floor of the receiver.
HDX has been specially developed for high quality radio
microphone systems.
Note:
Only transmitters and receivers that are equipped with
can work correctly with each other. If non HDX equipment
was mixed with HDX, the dynamic range would be
drastically reduced and the transmission would sound blunt
and flat.
RF link
Inherent
noise of
the RF link
Receiver
HDX