Kramer Electronics VP-771 - Manual (Page 46)

VP-771 - The OSD Menu 41
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6.8.1 The Luma Keying Feature
The luma keying feature lets you display the PiP window (the key image) as semi-
transparent over the main window. This feature can be used to have the PiP
window display a static or dynamic logo, for example, which will appear on a
transparent background.
To apply the luma keying feature, first set the PiP window to the desired size and
location and then turn luma keying On. The PiP image will show without its
background.
The lower the luminance in the PIP window, the more transparent it becomes, thus
letting the main window image show. The higher the luminance, the less transparent it
becomes, not letting the main window show through. To use this feature it is
recommended to set the PIP image as follows: use low-luminance colors for the
background (the key image portion) and high-luminance colors for the logo.
For certain displays, the screen may flicker once for about a second
after activating or changing the luma keying setting.
Since luma keying is a volatile parameter, it may reset unexpectedly
following a change in the setup. So we recommend that you activate it
after completing the setup.
When the luma keying feature is On, any change in the setup (either
by the user or by resetting due to a setup change) may cause the
screen to flicker once. The luma keying will recover automatically after
resetting.
6.8.2 The Emergency Alert System
The Emergency Alert System (EAS) is a unique, versatile feature for immediate text
overlaying, with flexible options such as the inclusion of an audio alert siren and the
choice of displaying an emergency notification via either a text crawler or a text
window.
The EAS provides the ability to have a site-wide notification immediately displayed
when an emergency situation develops that could affect the health and welfare of
the people attending the site, whether that site is an educational facility, a corporate
site, a stadium or any other location where large groups of people come together.
Messages can include specifics about weather (tornadoes, hurricanes, high winds,
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