SONOSAX SX-R4 User Manual - Hardware Description - Manual (Page 13)

SONOSAX SX-R4 User manual / Hardware description Page 13 of 19
4.3.3 Led's Peakmeters
This small peak meters has three distinct functions. It indicates not only the input level of the channel but
also the Limiter activities as soon as the signal reaches the threshold level and the eventual overloads.
These meters are connected at the input of the A/D Converter
Level indication:
Green Led: the modulation reaches an internal level of approx -20dB.
Yellow Led: the modulation reaches the nominal internal level 0dB (-18dBFS)
Red Led: the modulation reaches an internal level of approx +10dB
Limiters:
The Limiter activity is shown by lighting simultaneously the Red and the Green led's for a
period of approx 1 second
Overloads:
the overload is indicated as soon as the clipping level is reached (0dBFS). In this case all
led's light at the same time
NOTE:
The Leds intensity varies automatically depending on ambient light. It is controlled by the
light sensor located on the left side of the Joystick
4.3.4 Input Limiter
Each of the 4 input channels is equipped with a protection Limiter which is part of the microphone pre-
amplifier design. The Limiter is automatically activated 2dB below the clipping level of the A/D converter (–
2dBFS) and can not be de-activated. The Threshold is set at factory and can not be modified by the user
The Limiter activity is indicated by the 3 Leds Peak-Meter by lighting the Red and the Green Led for a period
of approx 1 second.
4.3.5 Red Led [ OVD LINE]
This Red Led indicates the eventual overload on the Line Inputs 5 & 6. It lights as soon as the clipping level
of the A/D Converter 5&6 is reached