BSS Audio Omnidrive FDS-388 User Manual page 29

EQ Screen
At the bottom of the screen the small arrowheads indicate the filter frequencies
in the current band. A solid arrowhead and a dotted vertical cursor are used to
represent the current filter.
Two curves are displayed on the Eq screen. The solid line represents the
resultant response of the filters in the currently selected band as if the band
were full bandwidth from 15Hz to 20kHz. The dotted line is the actual
frequency response of the current band with the crossover rolloffs added to the
filter curves. This allows the user to see equalisation curves even when they
have no effect in the current output.
To select a filter press the parameter wheel. Each press will move through the
filters in the order A1, A2, B1, B2, C1, C2, D1, D2 and back to A1. If any filters
have been taken for phase adjustment or have been hidden by the OEM system
designer then they will be missed out. If no filters are available, it is not
possible to enter the EQ Screen.
Pressing the top Soft key and turning the parameter wheel adjusts the centre
Top Soft Key
frequency of the currently selected filter. The value in the soft key box is the
filter frequency in Hertz; the centre frequency for bell curves, the 3dB point for
FR/Hz
shelving curves.
Middle Soft Key Pressing the Middle Soft key and turning the parameter wheel adjusts the band
width of the currently selected filter. The value in the soft key box is the width
of the filter in octaves. The width of each filter is adjustable from 0.05octaves
W/Oct (SLOPE)
up to 3octaves. If the filter is set to shelving, this box allows the user to select
either 6dB per octave or 12dB per octave filter slopes.
Refer to section 10.0, Eq Utility Screen - Filter Shape
Bottom Soft Key Pressing the Bottom Soft key and turning the parameter wheel adjusts the cut or
boost value of the current filter. The value in the soft key box is the cut or boost
value in dBs. A maximum of ±15dB is available in each FDS-388 filter.
+/–dB
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