Field count and channel count drive different checked schedule outputs. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Four fields and three channels set the baseline row
4 fields at 5 seconds each take 20 seconds. With 3 channels, captures are 12.
4⋅5=20,4⋅3=12
More fields raises time while captures stay fixed
6 fields at the same dwell take 30 seconds, while 2 channels still make 12 captures.
6⋅5=30,6⋅2=12
More channels raises captures while time stays fixed
4 fields keep time at 20 seconds, but 5 channels make 20 captures.