BSS Audio FDS-334T Owner's Manual - Manual (Page 17)

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Front Panel Metering
LED Input Bargraphs
The Input bargraphs respond to the peak input signal and also indicate digital clipping. These
show the input level, i.e. +3dB, +6dB, +12dB over 0dBu (+20dBu=Maximum input), while
-3dB and SIG show the level below 0dBu.
In addition, the CLIP lights function both as analog input clip indicators and to show if there is
clipping in the digital signal path. If both A & B CLIP LEDs flash but the LED directly below the
CLIP does not, this would indicate that the DSP is clipping and not the analog input circuitry.
This situation would most likely be caused by excessive digital gain or EQ in one or more
Outputs.
LED Output Bargraphs
The Output bargraphs represent signal level relative to limiter threshold.
As an example, if a +4dBu signal is routed to an output with the gain set to 0dB and the limiter
set to +10dBu, then the -6dB LED would light indicating 6 dB of headroom.
(+10dBu - (4 + 0)dBu = 6dB).