User`s manual

Basic Operation and Features
Basler A500
k 3-11
PRELIMINARY
3.3.1.1 ExSync, Edge-controlled Mode with Asynchronous Timing
Figure 3-9: ExSync, Edge-controlled Mode - Exposure Start and Stop with Frame Valid Low
The ExSync signal goes high and goes low while the Frame Valid signal is low. The Integrate
Enabled signal is set to high while the effective exposure occurs. The start, stop, and duration of
the 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 (exposure
start delay).
• Disregarding possible jitter, the duration of the effective exposure is defined by the ExSync
period 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 frame
valid goes low.
A504k A503k A501k
p Exposure as set by ExSync
d
3.3 µs 3.8 µs 20.8 µs
f
 3 µs  3.5 µs  12.8 µs
p = ExSync Period
3.3 µs ... 5.2 µs (A504k)
3.8 µs ... 6.2 µs (A503k)
2 µs ... 3.3 µs (A504k)
2.5 µs ... 3.8 µs (A503k)
13.5 µs ... 20.2 µs (A501k)
27 µs ... 40 µs (A501k)
p = ExSync Period
f =

3 µs (A504k)
f =

3.75 µs (A503k)
f =

12.8 µs (A501k)
ExSync
Frame
Valid
Line
Valid
Integrate
Enabled
TIMING CHARTS ARE NOT DRAWN TO SCALE