Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 407)

MAESTRO — Installation and Service Manual 407
Section
16
EAS Messaging Configuration
Maestro Master control supports EAS messaging to support the require-
ment for broadcasters in the United States to display Test and Alert mes-
sages that are generated by the Emergency Alert System (EAS).
An EAS message is fed by an external EAS data stream through a Maestro
Serial Tally port. This data is imported into the predefined Maestro internal
branding text crawl template, which is built specifically for each EAS crawl.
The EAS audio can come from either direct or external Routing switcher
sources. Maestro's GPIO controls the starting and stopping of EAS mes-
sages. The EAS message video is assigned to Maestro's
Keyer 8 button and
cannot be changed. However, EAS audio is fixed assigned to AudioOver4
button but can be changed manually to a different audio source. If the EAS
Messaging option is used, there will be a reduction of Channel Branding
resources.
Reduced Channel Branding Resources
When the Emergency Message (EAS) option is configured, the general
purpose Channel Branding resources are reduced as follows:
• One animation or text crawl source. The second source is reserved for
EAS Keyer assignment.
• Three Audio Voice Over sources. Mixer 4 is reserved for external audio
input from the EAS encoder.
• Seven Video keyers. Keyer-8 is reserved for EAS.
• One external Audio Mixer Input is reserved for EAS. The Audio Mixer
Input can be of any type except Internal.
• EAS Messaging supports up to 4000 characters in an EAS message that
is received thru the serial connection.