[CQ-Contest] Skimmer reverse beacon experiment - update

[Marijan Miletic]

N4ZR: In "spot everything mode, it reports every station it hears - you can
imagine how 
useful this would be for a DXpedition station managing a big pileup.

There are two potential problems: wrong callsign decoding and proper DX
transmission timing.
RTTY TX delays using only visual waterfall info is a good illustration of
the second case.

73 de Mario, S56A, N1YU