Exsync, Programmable Mode With Synchronous/Asynchronous; Timing - Basler A500k User Manual

3.3.3.2 ExSync, Programmable Mode with Synchronous/Asynchronous

Timing

ExSync
Frame
Valid
Line
Valid
Integrate
Enabled
TIMING CHARTS ARE NOT DRAWN TO SCALE
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.
p
d
f
g
k
Basler A500
PRELIMINARY
p = Timer 1
d = 1.7 µs ... 3.7 µs (A504k)
d = 1.7 µs ... 4.2 µs (A503k)
d = 6.9 µs ... 20.2 µs (A501k)
p = Timer 1
f =  1 µs (A504k)
f =  1.25 µs (A503k)
f = 7.1 µs (A501k)
k
A504 A503
Exposure as set by Timer 1
1.7 µs ... 3.7 µs 1.7 µs ... 4.2 µs
 
1 µs 1.25 µs
 
3 µs 3.75 µs
ExSync Period
4.7 µs (A504k)
5.5 µs (A503k)
26.4 µs (A501k)
g =  3 µs (A504k)
g =  3.75 µs (A503k)
g =  6.2 µs (A501k)
k k
A501
6.9 µs ... 20.2 µs

7.1 µs

6.2 µs
Basic Operation and Features
3-21