Contest operating goes outside the band edges. Someone answers a CQ at 14352, or
a radio reports a frequency a few hundred hertz off, and Bands.ForFrequency
returned null: the contact scored nothing, missed the per-band dupe check and
exported with no band.
N1MM buckets a frequency by its whole megahertz — its BandFor divides the
kilohertz by 1000 and switches on the result, with 1 and 2 both 160M, 3 and 4
both 80M, 28 and 29 both 10M — and never looks at a band edge. Same rule here,
except that the real edges are checked first: 2190M and 630M are both under
1 MHz and share the bucket, so nothing else can tell them apart. A frequency
under 1 MHz that misses both edge ranges still has no band, as it does in N1MM.
The bandmap clamped its slice to the band edges, so a radio past the edge left
the receiver bar off the top of the scale. The slice now stretches to wherever
the radio is.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>