[BC] Two tones
Warren Shulz
warren.shulz at citcomm.com
Fri Oct 9 11:35:17 CDT 2009
Two-tone alerts were left over for the nuclear evacuation public. A lot
of monitor radios live on that were distributed to the public for
nuclear evaluation. These radios (placed in publics hands) are pre-SANE
FSK and had only the EAS two-tone alert decoder to open squelch. Much
like NOAA still uses 1040 Hz alert tone for older WX radios.
Using these tones is to keep legacy equipment functional. The tones had
nothing to do with alerting the public. These are an in-band alert tone
for equipment downstream. The were never intended for the public
attention.
Warren Shulz
IL SECC
-----Original Message-----
From: Tom Spencer
I know SOME stations are also including the older EAS dual-tone
attention signal at least for actual events....
Since its purpose is to call ATTENTION to the message that follows, it
would seem that the downstream stations (no other station monitors them)
could use at least the shortened version of those tones to herald Very
Important Messages...
How many stations DO still use the 2-tone attention signal?
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