[EAS] New EAS handbook

[Harold Price]

There is no technical reason whatsoever.  The attention signal is now 
used only as an audience notification, the technical parameters allow 
decoders to detect and remove it from the incoming audio.

Several commenters referenced by the FCC in the 5th R&O 
https://transition.fcc.gov/Daily_Releases/Daily_Business/2012/db0110/FCC-12-7A1.pdf 
talked about reducing or removing the tones, though some argued to 
retain it at the eight-second length.  The FCC seemed to be moved by 
the arguments that the audience needed a while to get ready to hear 
the message.

Harold

At 02:49 PM 7/25/2017, Botterell, Arthur at CalOES wrote:
>One of the reasons that EAS had to be ruled out as a transport for 
>Earthquake Early Warnings was that extended attention signal.  Is 
>there any remaining technical reason for the attention signal to 
>continue for eight long seconds?
>
>Art