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Group 4. Reception quality related levels
Ultrasonic Noise
– Indicates the MPX signal amplitudein the approximate bandwidth of
80
kHz
–
150 kHz
.
Stereo Blend
– A value of
100%
indicates that no reduction is applied. The level of stereo
blending depends on the following input signals: RF Signal Level, Multipath, Ultrasonic Noise
and Pilot tone deviation.
High Cut
– Audio disturbance effect is mostly present in the high frequencies. A value of
100%
indicates that no “high cut” is applied. The applied High Cut level depends on the following input
signals: RF Signal Level, Multipath and Ultrasonic Noise.
Soft Mute
– If a disturbance is present in the received signal, the perceived effect can be reduced
by attenuating the audio signal. The reduction of audio volume is called “soft mute”. A value of
0%
indicates that no “soft mute” is applied. Soft Mute depends on the following input signals: RF
Signal Level, Multipath and Ultrasonic Noise.
