MATHS divides an incoming clock by setting Rise time longer than the interval between triggers

Because a MATHS channel ignores re-triggers during the rising portion of its function and only accepts a new trigger during the fall, it can divide a clock. If the Rise time is set longer than the incoming clock’s period, every pulse that arrives during the rise is ignored; only the first pulse arriving after the function has fallen restarts it, so the output fires once per several input pulses. A larger Rise time gives a larger division ratio, and because Rise is voltage-controllable, MATHS becomes a programmable voltage-controlled clock divider. The Fall time sets the width of the divided output pulse; if Fall exceeds the division period the output stays high.

Examples

A steady clock into CH1 Trigger with Rise raised well above one clock period -> divided clock at EOR/output. Increase Rise for a higher division ratio; use Fall to widen the output pulse.

Assessment

Why does raising Rise time above the clock period cause division rather than one-to-one triggering? Which parameter sets the division ratio, and which sets the output pulse width?