[sbe-eas] EAN Test - a real disaster!
Fawcett, William - fawcetwd
fawcetwd at jmu.edu
Wed Nov 9 16:54:01 EST 2011
NPR has confirmed that the audio from FEMA was contaminated with a second set of tone starting about 5 seconds in.
"This is a test of the emergency alert system. This is only a tesBREEP BREEP BREEP."
Chances are that FEMA has a blue sage endec and did not read the service bulletin from SAGE.
" What they sent us was the duck farts, tones, audio message started and then we got a second set of duck farts and tones. I assume that this is what took most of the stations off the test. The audio message continued to its conclusion and then an EOM was issued. The audio we received from FEMA was distorted and very high level. That's what we passed through."
From: sbe-eas-bounces at sbe.org [mailto:sbe-eas-bounces at sbe.org] On Behalf Of Bob Reite
Sent: Wednesday, November 09, 2011 4:13 PM
To: SBE EAS Exchange - a mail list for discussion about the Emergency Alert System and other emergency communication issues.
Subject: Re: [sbe-eas] EAN Test - a real disaster!
The same sort of thing (10 seconds into the announcement it starts looping back on itself) happened in the Wilkes-Barre Scranton area of PA, although I'm not sure if it was due to a Sage Digital box having the input level too high at the NPR station or an LP-2 monitoring an LP-1, I'll have to investigate this one and get back to the list.
However, in Columbia county, it worked correctly, but sounded like AM on
75 meter ham radio. The owner of the Columbia county stations that I contract for said that he really had to concentrate to understand what the announcer was saying.
On 11/9/11 3:09 PM, Fawcett, William - fawcetwd wrote:
> In our local area the LP-2 got the PEP feed from NPR. As soon as it
> went over, the LP-1 picked it up, resending it. LP-2 monitoring LP-1
> then picked up the LP-1 feed and so on. Massive feedback loop until
> manually terminated. You have got to hear this to believe it.
> It seems that the BURK unit will not see a second relay as a
> duplicate, but rather gives it priority (for an EAN).
> LP-2 using the Burk unit, LP-1 using the TFT, both legacy devices
> passed muster with the FCC.
> The state relay feed monitored by the LP-1, which was not used in our
> local area (because the PEP feed hit first), had a 6 sec delayed
> artifact in it, but was not horrible.
> I'm suspecting the unsupported BURK unit in this case, as the Stae
> Relay Feed to the LP-1 would have broken the feedback loop at if the
> TFT reacted to each instance in the same manner. I'm not sure if the
> downline stations got the EOM or if they had to manually reset.
> Would like to hear from any other LP stations using the BURK endec.
> Not that this will again be a problem.
> Both LP stations have Sage Digital endecs awaiting installation.
> Description: image002
> William D. Fawcett
> Shenandoah Valley Emergency Alert System
> 983 Reservoir Street
> Harrisonburg, VA 22801
> (540) 568-3809 fawcetwd at jmu.edu
> sbe-eas mailing list
> sbe-eas at sbe.org
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