Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 53)

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Imagestore 750
User Manual
Each default EAS template file can be copied (from /etc/eas/ into /home/images/) and
then modified to suit your requirements in the TextBuilder application (available on the Media
Conversion Suite CD). You can customize background color, crawl speed, font, size, shadow, and
positioning. You can also add additional elements to the crawl such as another text field or a
logo or graphical element.
Note the following considerations relating to EAS template files:
• The EAS template filename should not be changed. Otherwise, the EAS option will not be
able to find the template.
• Always use Text Builder to transfer modified files to the Imagestore 750 so that all fonts asso-
ciated with the template are also transferred.
• The datasource name “EAS_TEXT” is associated with the text crawl element in an EAS tem-
plate. Ensure that its datasource value is not inadvertently adjusted by automation because
doing so can affect the EAS message on-air.
• If no text has been received from the EAS receiver, blank text will be seen in the EAS tem-
plate. Either leave this blank, or pre-set the data-source to something harmless such as
“Stand by for an important EAS alert.”
EAS Triggering
 Note: EAS messages are displayed on-air following appropriate GPI triggers or automation
commands. Refer to
General Purpose Interface (GPI) on page 47 for information about
setting up the relevant GPI. For automation commands, refer to the automation publications
listed under
Applicable Publications and Tools on page 3.
When an EAS alert is triggered ‘on’ by GPI or by automation, the following internal events occur:
• The ‘EAS Layer’, which is the most downstream keyer, is cut down. Its prior keyer state and
the image loaded (if any) are saved for later use.
• The appropriate EAS crawl template is loaded into the ‘EAS Layer’. The selected crawl file is
determined by the alert level in the crawl data and the video standard. The crawl data must
be received before the EAS alert is initiated, otherwise stale data will be displayed.
• The ‘EAS Layer’ is cut up to reveal the EAS alert (in the video foreground).
When an EAS alert is triggered ‘off’ by GPI or automation, the following internal events occur:
• The current EAS crawl will complete, after which the ‘EAS Layer’ cuts down.
• The previous image (if any) is reloaded into the ‘EAS Layer’.
• The ‘EAS Layer’ is restored to its prior state.
EASLow.oxa 3 (low) 525i / 59.94, 625i / 50
EASLowHD1080.oxa 3 (low) 1080i / 59.94, 1080i / 50
EASLowHD720.oxa 3 (low) 720p / 59.94, 720p / 50
EASNone.oxa None 525i / 59.94, 625i / 50
EASNoneHD1080.oxa None 1080i / 59.94, 1080i / 50
EASNoneHD720.oxa None 720p / 59.94, 720p / 50
Table 4-7: Standard EAS alert crawl template Filenames