User`s manual

Basic Operation and Features
Basler A500
k 3-21
PRELIMINARY
3.3.3.2 ExSync, Programmable Mode with Synchronous/Asynchronous
Timing
Figure 3-17: ExSync, Programmable Mode - Exposure Start When Frame Valid is High, Exposure
Stop When Frame Valid is Low
The effective exposure starts while the Frame Valid signal is high and stops while the Frame Valid
signal is low. The FlashOut 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 3-17):
• 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 period p (set
by Timer 1).
• Jitter may shorten (f) or extend (g) the effective exposure, i.e.
duration of the effective exposure = p - f.
A504k A503k A501k
p Exposure as set by Timer 1
d
1.7 µs ... 3.7 µs 1.7 µs ... 4.2 µs 6.9 µs ... 20.2 µs
f
 1 µs  1.25 µs  7.1 µs
g
 3 µs  3.75 µs  6.2 µs
p = Timer 1
ExSync
ExSync Period
4.7 µs (A504k)
5.5 µs (A503k)
26.4 µs (A501k)
Frame
Valid
Line
Valid
d = 1.7 µs ... 3.7 µs (A504k)
d = 1.7 µs ... 4.2 µs (A503k)
d = 6.9 µs ... 20.2 µs (A501k)
f =

1 µs (A504k)
f =

1.25 µs (A503k)
f =

7.1 µs (A501k)
p = Timer 1
Integrate
Enabled
TIMING CHARTS ARE NOT DRAWN TO SCALE
g =

3 µs (A504k)
g =

3.75 µs (A503k)
g =

6.2 µs (A501k)