[EAS] The Daisy Chain

[Dave Kline]

Satellite PEP Source NPR (Squawk) also does not send EAS tests that includes audio. They only do RWTs.
The best you can hope for is that the occasional audio that does come down the Squawk channel is somewhere in the ballpark of what it would be if they do an RMT/NPT/EAN alert containing audio.
And since that occasional audio is not intended for broadcast/replay, it can be a real crapshoot. Couple that with an EAS box that is touchy about being overdriven, and the chances for success diminish quickly.

I consider myself lucky that our box worked well. I've got a bit of AGC between my PRSS receiver and my EAS box. That may have helped in spite of having no test audio to set it up. Anyway the test went fine here, but I was surprised.

It would be nice if the PEP's could send an RMT and you could set your box to receive it but not relay. At least you could play back the audio as recorded in the EAS box and make sure the two-tone attention signal, as sent over the satellite, isn't over-driving the input.

On Sat, Aug 14, 2021 at 5:34 PM Sean Donelan sean at donelan.com wrote:
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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Dave Kline - Solder Jockey
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