On 20/12/2018 15:30, Rich Zwirko - K1HTV wrote:
Any idea as to why WSJT-X is responding this way?
Hi Rich,
WSJT-X in FT8 mode is a block message decoder, messages are accumulated
throughout the whole Rx period and decoded afterwards, no attempt is
made to attribute decodes to a previous band if the frequency is
switched part way through a period.
Your solution is simple, time your band changes to be within the first
half of a receive period. Near enough to the start of period to ensure
no decodes of the old band are possible (in the first half will assure
that) but long enough after the start to ensure that decoding and
spotting is compete for the old band, that depends on your system speed.
For FT8 I would try switching at start of period plus 5 seconds. Doing
so earlier will get more decodes for the new band on the switch over
period if your system is fast enough.
73
Bill
G4WJS.
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