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Re: [linuxham] Reverse (Rv) by default

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  • Brian Lloyd
    ... Not so strange. Most CW ops like to use LSB because it means when you tune up in frequency, the pitch of the signal goes up as well. (The BFO injection is
    Message 1 of 10 , Jan 20, 2010
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      On Wed, Jan 20, 2010 at 12:45 AM, IZ8MBW Fabio <iz8mbw@...> wrote:
       

      The "strange" thing is that by default also new radio such as Yaesu FT-857 wants to use by default the LSB mode...

      Not so strange. Most CW ops like to use LSB because it means when you tune up in frequency, the pitch of the signal goes up as well. (The BFO injection is above the signal so the pitch increases as it moves up and away from the signal.)

      The issue with LSB and RTTY is probably the same one. LSB makes tuning by ear easier. The problem with LSB is that it inverts the order of signals in the passband. Higher RF frequencies are lower-pitch audio tone when using LSB. Modes that require the order and relationship of signals to be correct need to use USB or make a correction for this inversion process in the hardware/software.

      If you are not listening to the signals you will most likely prefer USB operation as it preserves the RF-to-audio relationship. This makes the waterfall much easier to use.

      --
      73 de Brian, WB6RQN/J79BPL

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