XPost: rec.radio.amateur.policy, uk.radio.amateur   
   From: et472@ncf.ca   
      
   On Wed, 10 Feb 2016, gareth wrote:   
      
   > "Michael Black"  wrote in message   
   > news:alpine.LNX.2.02.1602101450460.9292@darkstar.example.org...   
   >> On Wed, 10 Feb 2016, gareth wrote:   
   >>> "Southgate Amateur Radio News RSS Feed"    
   >>> wrote   
   >>> in message news:047d7bd769663e0786052b686ebe@google.com...   
   >>>> The Den of Geeks report The CW Television Network plans to make a TV   
   >>>> series  based on the amateur radio themed movie Frequency   
   >>> Television by CW ????? Must be even less usable than slowscan!!!  :-)   
   >> Well there used to be a scheme of transmitting data via a tv set, I forget   
   >> the details.   
   >   
   > ISTR that it involved a white square at the top corner flashing on and off,   
   > although at establlished frame rates of analogue TV (60 Hz Yanks, 50 Hz   
   > Brits)   
   > the effective baud rate was low.   
   >   
   I can't remember, so maybe there were two methods.   
      
   I seem to have memories of both something where you had to wait while the   
   data was transmitted, and something else where it was sent along with   
   regular programming, so you'd get the data transfer while you watched the   
   show.   
      
   It's been something like 30 years, and obviously whatever it was never   
   went very far.   
      
      Michael   
      
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