John,
I'm not an Orion owner, but if it's the same as most other rigs .....
When switched to UCW the receiver will pick up CW signals that are higher than 
the displayed frequency
When switched to LCW the receiver will pick up signals that are lower than the 
displayed frequency
So using your example, when you're tuned to 7019 UCW you can hear signals at 
7020 because they're higher. If you tune to 7021 and select LCW you'll hear the 
same signal because it's now lower.
I think I'm saying the same as everyone else but in a slightly different way :)
Hope this helps,
.
73,
Steve G3TXQ
  ----- Original Message ----- 
  From: John B. Egger 
  To: Discussion of Ten-Tec Equipment 
  Sent: Saturday, October 28, 2006 12:47 AM
  Subject: [TenTec] UCW and LCW
  I'm a bit puzzled by these two O-2 modes. When UCW is selected, the 
  lower CW sideband is audible; that is, if zero-beat is 7020, to hear the 
  signal one tunes down to 7019 etc. When LCW is chosen, one must tune UP 
  from zero-beat to hear the signal.
  Isn't this the opposite of what LCW and UCW should mean?
  -- 
  --John K3GHH
  Registered Linux User #291592
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