10 Dec
1998
10 Dec
'98
2:11 a.m.
Somewhat apropos the recent thread about sending mains
power
through modems, can anyone tell me if it's legal or illegal
here in the States to send data in the audio of television or
radio?
Yes - and it's commonly done. The new Emergency Broadcast
System replacement transmits 1200 bps (I believe Bell 212A
modulation) bursts over TV and radio audio. And many different
digital services are encoded in the video blanking interval of
TV signals - closed captioning, timestamps, and program
information, among others.
Certainly there would be bandwidth and therefore
speed
limitations, but does the FCC allow this?
It's a requirement of the new EBS replacement!
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927