Grass Valley 1200 Operation Manual - Manual (Page 34)

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Section 2— Startup
Define Inputs Menu
From the Configuration menu select [DEFINE INPUTS>] to
display the Define Inputs menu (Figure 2-8). This menu is
typically configured during switcher installation. However, you
may want to change configurations for different types of
production sessions. The Inputs menu allows you to do the
following:
■ Give each physical input a descriptive name which is carried
forward into several other menu levels.
■ Attach characteristics to each physical input, such as bit
resolution of the source, identification of the signal type, and
association of key cutters with fills. The signal type tells the
switcher whether the input is to be treated as video, shaped
video, key, or key with depth.
■ Designate a video/key pair as the return inputs in systems
where an effects send and return will be used. This
information is needed by the switcher for automatic
switching of the effects loop. (See the explanation of Effects
Send later in this section for details.)
■ Select 4:2:2 chroma key inputs or full-bandwidth 4:4:4 chroma
key inputs. Two physical inputs are needed to accommodate
a full-bandwidth chroma key signal. The Inputs/4:4:4 CK
Sources sub-menu designates those two physical inputs.
■ Associate a four-character legend with each physical input.
These legends appear in the Inputs menus and also in the LED
displays that may be installed between the Key and Aux
crosspoint pushbutton rows.
Define Inputs
Using the Define Inputs menu, define each input as follows:
1. Select a Physical Input using the (PHYSICAL INPUT) soft
knob. The physical input numbers are the same as the jack
numbers on the back of the electronics frame.