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HOw to broadcast call sign

The new IUT reserved bands for HF radars, require regular broadcast of the call sign. This is implemented by chirping at a very high repeat rate (200-300 Hz) over the entire assigned bandwidth so that a SSB demodulator can hear the signal at all frequencies.

The following script will trigger our call sign

  WA2XXL
  .-- .- ..--- -..- -..- .-..

(./call_sign) > /dev/ttyUSB3

 #!/bin/csh -f
 # see http://morsecode.scphillips.com/jtranslator.html
 # WA2XXL
 #.-- .- ..--- -..- -..- .-..
 alias m 'echo "TR 00250000";sleep 2;echo "M 0";sleep 2'
 alias do 'echo "M 3";sleep 0.10;echo "M 0";sleep 0.25'
 alias da 'echo "M 3";sleep 0.60;echo "M 0";sleep 0.25'
 alias s 'echo "M 0";sleep 0.5'
 alias r 'echo "M 0";sleep 2;echo "M 3";sleep 2;echo "R"'
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