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Re: Re[2]: [MT63] Legality of MT63 in U.S. (Was: System requirements for MT63?)

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  • Chuck Forsberg WA7KGX N2469R
    This is the old phasing .vs. filter methof of sideband generation issue. Central Electronics built phasing type generators back in the 50s or 60s as I recall.
    Message 1 of 15 , Jan 2, 2001
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      This is the old phasing .vs. filter methof of sideband generation issue.
      Central Electronics built phasing type generators back in the 50s or 60s
      as I recall.

      As far as I know all contemporary SSB transceivers use the filter method,
      so there are no I and Q inside the rig.

      ----- Original Message -----
      From: "Nick Fedoseev" <nf@...>
      To: "Tomi Manninen" <MT63@egroups.com>
      Sent: Tuesday, December 26, 2000 5:24 PM
      Subject: Re[2]: [MT63] Legality of MT63 in U.S. (Was: System requirements
      for MT63?)


      > Hello Tomi,
      >
      > Wednesday, December 27, 2000, you wrote:
      >
      >
      > Tomi> The reason we use SSB transmitters to do MT63 is because we all have
      them
      > Tomi> and because it just so happens MT63 (and almost any other <3kHz wide
      > Tomi> modulation) _can_ be done that way. If the basic transceiver from
      the
      > Tomi> land of the rising sun had I and Q inputs we certainly would use
      those
      > Tomi> inputs instead!
      >
      > Is it possible to create I and Q channels stable enough to
      > get sideband supression not worse than required by FCC?
      >
      >
      > Best regards,
      > Nick mailto:nf@...
      >
      >
      >
      > 8<---- cut here -------------------------------------------------------
      >
      >
      >
      >
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