On 01/10/2020 12:29, Jay Hainline wrote:
Using the Windows 64 bit version of WSJT-X 2.3.0-rc1
When monitoring FST4 mode on 630m, I have F Low at 600 and F High at
1400. Wide graph is using Bins/Pixel 4 with Start at 100 Hz. If I
increase T/R from 60 seconds to 300, my F Low and F High boxes turn
red. If I increase F Low to 1000, then the red disappears. Is this
expected?
73 Jay KA9CFD
Hi Jay,
as the T/R period increases with FST4 and FST4W modes the bandwidth
narrows. The consequence is that the Rx filters in the decoder are
closer together and far more candidate signals per Hertz can be
detected. The red background is a reminder that the analysis bandwidth
is unnecessarily wide and may lead to increased false decodes, and
certainly will increase the CPU resource required to decode. The
thresholds vary according to the T/R period selected.
73
Bill
G4WJS.
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