Lexicon Digital Controller DC-1 - Manual (Page 29)

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DC-1 Digital Controller
Installation and
Calibration
Input Configuration
System Setup
The DC-1 has eight analog stereo audio inputs, each of which can be
associated with any of the five video and four digital audio inputs. Selecting
Input Configuration from the Setup menu displays a sub-menu which lists
these inputs and allows you to select them individually for adjustment.
Each input has an identical parameter sub-menu. VCR 1 is shown below as
an example.
For optimal performance, the unit must be driven to its full input level
without overloading. Despite industry attempts at standardization, differ-
ent sources have a wide range of output levels. To compensate for this, each
of the eight DC-1 analog inputs can be assigned a different input gain,
assuring optimum performance and consistent volume, regardless of the
source. For use with a calibration tone, the Dolby reference point is indi-
cated by an enlarged tick mark on the on-screen level meters.
The DC-1 has an auto level function which monitors the analog input level
and automatically optimizes the input gain (AUTO). When activated, this
feature controls the input gain. If the signal level is too high and causes an
input overload, input gain is automatically decreased to a point which does
not cause an overload. When the signal level remains low (>12dB below
clipping for 2.5 minutes), the input gain is incremented in 1dB steps to
maximize dynamic range.
The DC-1 Setup menu allows you to customize the system defaults to suit
a wide range of possible system configurations. Each of the five entries in
the Setup menu will be discussed in detail in this section.
Select SETUP from the main menu to display the Setup menu. Use MENU
▲
and ▼ to step the cursor through the Setup menu selections. Once an item
is highlighted, pressing SELECT will display a sub-menu for that item.
With the sub-menu displayed, MENU ▲ and ▼ once again highlight menu
items. Press SELECT, then use MENU ▲ and ▼ to adjust the settings of any
item over its available range. Press DONE to exit any sub-menu; press
DONE again to return to the Setup menu.
Input Gain