[EAS] The Daisy Chain

Sean Donelan sean at donelan.com
Sat Aug 14 17:28:15 CDT 2021


On Sat, 14 Aug 2021, Gary Timm wrote:
 Yes Clay, this issue was identified on the FCC post-test call with SECC Chairs.
 Premiere sent Header Codes and EOM, but no audio message per many on the call.

Wow, first time in years I've ever heard anyone got anything through the 
Premiere FEMA satellite distribution.

Premiere (and SiriusXM) don't regularly test the audio message potion of 
EAS distribution end-to-end.

That shouldn't be a surprise. The EAS daisy-chain depends on setting audio 
levels all along the distrubtion chain. In order to set audio levels on 
the transmitters and receivers, need to regularly (at least monthly) send a 
test message including audio through the distribution channel.  Otherwise 
it will be a long time before you realize their is a problem, e.g. during 
an actual emergency.



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