Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 236)

Emergency Alert System Imagestore 750 User Manual
Page 236 Miranda Technologies Inc.
Imagestore 750; this data includes the alert level and crawl data. An
EAS alert message can be up to 2048 characters in length.
2. The Imagestore 750 requires a GPI trigger to initiate and terminate the
EAS alert. This GPI could come directly from the EAS receiver, from
automation, or be a manually initiated trigger. This GPI trigger runs a
separate on and off EAS macro which allows you to build a custom
branding event around the EAS crawl; this macro could include
replacing program video with a background, DVE squeeze-back to
reveal the crawl and keep the program video intact, and play a stored
audio clip which could provide a pre-recorded announcement.
3. The EAS alert includes an audio message. This message can be up to
two minutes in length and is stored in the receiver until the alert is
triggered to play. This audio is brought into the Imagestore 750 using
one of the voiceover inputs. As most receivers have analogue audio
outputs this audio will need to be converted to AES first using an
external converter such as the Miranda ADC-1711, ASD-712i, or ASD-
771p.
EAS Crawl Templates
Imagestore 750 monitors its COM ports for a serial string received from an
EAS receiver. When a message is received its priority is established and the
text is written and stored into one of the following default Easytext crawl