Basic Operation and FeaturesBasler A500k 3-11PRELIMINARY3.3.1.1 ExSync, Edge-controlled Mode with Asynchronous TimingFigure 3-9: ExSync, Edge-controlled Mode - Exposure Start and Stop with Frame Valid LowThe ExSync signal goes high and goes low while the Frame Valid signal is low. The IntegrateEnabled signal is set to high while the effective exposure occurs. The start, stop, and duration ofthe effective exposure are defined in the following ways (see Figure 3-9):• The effective exposure starts d microseconds after the rise of the ExSync signal (exposurestart delay).• Disregarding possible jitter, the duration of the effective exposure is defined by the ExSyncperiod p.• The effective exposure stops d microseconds or less (see following item) after the consecu-tive rise of the ExSync signal.• Jitter (f) may shorten the effective exposure, i.e.duration of the effective exposure = p - f .Due to the propagation time of approximately 1 μs, ExSync can go high up to 1 μs before framevalid goes low.A504k/kc A503k A501k/kcp Exposure as set by ExSyncd 3.3 μs 3.8 μs 20.8 μsf ≤ 3 μs ≤ 3.5 μs ≤ 12.8 μsp = ExSync Period3.3 μs ... 5.2 μs (A504k/kc)3.8 μs ... 6.2 μs (A503k)2 μs ... 3.3 μs (A504k/kc)2.5 μs ... 3.8 μs (A503k)13.5 μs ... 20.2 μs (A501k/kc)27 μs ... 40 μs (A501k/kc)p = ExSync Periodf = ≤ 3 μs (A504k/kc)f = ≤ 3.75 μs (A503k)f = ≤ 12.8 μs (A501k/kc)ExSyncFrameValidLineValidIntegrateEnabledTIMING CHARTS ARE NOT DRAWN TO SCALE
