OK, similar to the switching in rig's that generate CW keying. Thanks. You used the right buzz word for this old SWL'er ..Heterodynes I am most familiar with !
Are you currently Stateside Bonnie ? Andy. On 2/25/07, expeditionradio <[EMAIL PROTECTED]> wrote: > > > > > > The transmitted FSK frequency is simply a CW signal that is shifting > frequency at the symbol rate. > > Just like listening to a CW morse signal, it heterodynes to become a > "tone" at the receiver. >