Orban OPTIMOD-PC 1100 Operating Manual page 110

3-2
OPERATION
Because the AGC is a two-band unit with Orban's patented bass coupling
system, this meter actually reads the gain reduction of the AGC Master
band.
•
Gate indicators show gate activity. They light when the input audio falls below
the threshold set by the gate threshold controls. (There are two gating circuits—
one for the AGC and one for the multiband compressor/limiter—each with its
own gate threshold control.) When gating occurs, the AGC and compressor's re-
covery times slow drastically to prevent noise rush-up during low-level passages.
•
Multiband gain reduction meters show the gain reduction in the multiband
compressor. Full-scale is 25 dB gain reduction. Because of the 1100V2's dual-
mono architecture, each meter is split vertically to show the gain reduction in
the left and right channels.
•
Input Meters show the input level applied to the audio processing following
the Processor mixer. Normal levels are around –20dB. This is because the Proces-
sor Mixer has sufficient headroom to drive the AGC into full 25 dB of gain reduc-
tion without clipping.
•
Output Meters show the output levels of the processed signal before it is ap-
plied to the output routing switcher in the I/O Mixer.
•
Limiter meters show the amount of low-IM look-ahead peak limiting in the left
and right channels, which we chose not to couple because the fast release time
of this circuit would otherwise cause elements in one channel to modulate the
opposite channel objectionably. Full-scale is 12 dB gain reduction.
•
Control Pane shows editing controls that allow you to customize the factory
presets. There are two levels of control: Basic Control and Advanced Control. The
control pane is organized in tabs. Clicking a given tab will bring up the controls
pertaining to the tab's title.
Sliders can be grouped according to the following rules. When sliders are
grouped, adjusting one slider will cause all other sliders in that group to move
by the same number of increments.
• At least one slider in a given window is always active and will be the base for
any grouping.
• SHIFT CLICK will toggle a slider's status (ADD or REMOVE) with the current
group of one or more sliders.
• CONTROL CLICK will add a slider to the current group.
• CLICK DRAG will un-group all current sliders and make a new group consisting
of the sliders within the hatched selection box.
ORBAN MODEL 1100