Free-Run Mode With Asynchronous Timing - Basler A500k User Manual

3.3.4.1 Free-run Mode with Asynchronous Timing

Internal
Control
Signal
Frame
Valid
Line
Valid
Integrate
Enabled
Figure 3-20: Free-run, Programmable Mode - Exposure Start and Stop with Frame Valid Low
The effective exposure starts 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 3-20):
• The effective exposure starts d microseconds after the rise of the internal control signal
(exposure start delay).
• The duration of the effective exposure is defined by Timer 1.
p
d
k
Basler A500
PRELIMINARY
p = Timer 1
d = 1.9 µs (A504k)
d = 1.9 µs (A503k)
d = 7 µs (A501k)
p = Timer 1
k
A504 A503
Exposure as set by Timer 1
1.9 µs 1.9 µs
Internal Control Signal Period
Timer 2
3 µs (A504k)
3.5 µs (A503k)
20.1 µs (A501k)
TIMING CHARTS ARE NOT DRAWN TO SCALE
k k
A501
7 µs
Basic Operation and Features
3-25