Convert band name to frequency, mode dependent. Uses a table of defaults that
depends on the mode, falls back to bare band if none of the defaults match.
Parameters
s: string
Band name as per ADIF
m: string
Mode.
Returns null|number
Frequency somewhere in the appropriate band segment.
Convert band name to frequency, mode dependent. Uses a table of defaults that depends on the mode, falls back to bare band if none of the defaults match.