[EAS] RWT trigger detection...more info

[Dale Lamm]

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I'm leaving the whole post intact for reference.  Please do not edit.

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I had to edit it because the radiolists software will not post a message
with more than 80% quoted text. Sorry. Now, my original reply...

Mike, it wasn't clear to me a day or two ago whether you were looking
for new ideas or validation of your own idea.

Yes, your idea of in-band signaling using DTMF or other tones should
work. The concept is old enough that any patents have likely expired, so
it might be possible for a vendor to incorporate the logic into their
offerings, possibly by nothing more than a software change to the DSP
filtering and GPU.

It would cost the manufacturer money to add the feature, even if no
actual hardware change was mandated. Deciding whether to add your
requested feature or fix bugs or add more frequently requested features
is of course up to the manufacturer. Your mention was the first time I
have ever heard of the need to remotely command an EAS box using in-band
signaling.

The idea would be a useful means of eliminating labor and potential
sources of error, especially in an environment where one program
provider controls multiple call-lettered transmitters.

There is one blindingly obvious method to achieve what you want with
materials you likely already have on hand, but only if these two
conditions apply to your case:

1) your automation can produce a relay closure in response to an item in
the traffic log

2) your program circuit is feeding just one outlying transmitter, or
multiple transmitters using the same call letters

If this is your situation, let me know and I'll tell you how to produce
an RMT for your outlying transmitter(s).

Dale