Grass Valley Maestro Master Control v.2.4.0 - Manual (Page 244)

MAESTRO User Manual 240
Keyer Section
In this example, the Spanish and French output groups (which are shown
in
Figure 147 mapped to the Main Stereo input group) have been un-
mapped.
Keyer Section
The Maestro can accept up to four external-key signal inputs. (Each can
have an associated “cut” signal if desired.)
The keyers are used to insert video into a Preset source and follow the
source when it is transitioned to Program.
Each of these four key signal inputs can be assigned to only one of four
upstream keyers, or to one of four downstream keyers. The upstream
keyers are numbered one through four; the downstream keyers are num-
bered five through eight.
When the Upstream button is ON (by itself), the next transition will affect the
upstream keyers and the background.
When the Downstream button is ON (by itself), the next transition will only
affect the downstream keyers (not the background). If a downstream key is
inserted, and the operator returns to upstream mode, the key will remain
on Air regardless of background changes and upstream key operations.
All keys can be previewed and adjusted before they appear on Air.
If your preference is to place a key on air, the key source is assigned to one
of the keyers on the Preset bus. Using
Edit , the key can then be set up as
needed. When a transition is performed, the key--with all of the previous
setup information--will move to Program.
Key Source Selection
A key source is selected in similar fashion to any other source. The source
is entered on the Source Assign keypad as described on
page 176 .
To assign the key source, a Preset button is pressed (in the Keyer Control
group). The mnemonic for the new key source will now appear on the
Program button.
Note Because there are eight keyers, but only four Preset key buttons, the Keyer
Bank (hardware panel) or Shift (GUI) button is used to access the down-
stream keyers (keyers five through eight).
It is possible to insert the key instantly with the appropriate Program
button, but normally a transition is performed using the
Take button.