Doug,

> How about a "digital" signal consisting of a FM square wave?  You
> transmit a carrier for a time coresponding to your max range.  The you
> suddenly shift the transmit frequency by your IF frequency for the other
> half of the 50% duty cycle square wave.  Echos from the first half would
> be recieved by your IF during the second half and vice versa.  This
> simple constant power binary FM signal would be hard to forbid as a
> "pulse" emission,

But if you slew the frequency fast enough to be useful, you will be creating
virtually the same sidebands as if you simply switched it on and off.

........................... Zim

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