The bar was one colour for its whole travel, so nothing distinguished a signal
that is merely readable from one that belongs in the log as 59+20.
Green to S9, amber through the S9+ range, red from +20 dB. The thresholds are
computed from the SAME S9 point the label uses rather than hard-coded
percentages: the S9 position is still a hypothesis on this rig, and when it is
corrected the colours have to move with it or the meter would say 59+20 in
amber.
rouggy
8cc6997eec