User`s manual

Basic Operation and Features
Basler A500
k 3-27
PRELIMINARY
3.3.4.3 Free-run Mode with Synchronous Timing 1
Figure 3-22: Free-run, Programmable Mode - Exposure Start and Stop with Frame Valid High
The effective exposure starts and stops while the Frame Valid signal is high. The Intergrate
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 3-22):
• The effective exposure starts d microseconds after the fall of the internal control signal (expo-
sure 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) to (p + g).
• The duration of the effective exposure can only occur in multiples of m microseconds.
A504k A503k A501k
p Exposure as set by Timer 1
d
1 µs ... 3 µs 1.25 µs ... 3.75 µs 6.9 µs ... 20.2 µs
f
 2 µs  2.5 µs  5 µs
g
 2 µs  2.5 µs  5 µs
m
2 µs 2.5 µs 13.2 µs
Frame
Valid
Internal
Control
Signal
p = Timer 1
Internal Control Signal Period
Timer 2
4 µs ... 6 µs (A504k)
5 µs ... 7.5 µs (A503k)
26.2 µs ... 39.8 µs (A501k)
Line
Valid
2 µs ... 3 µs (A504k)
2.5 µs ... 3.8 µs (A503k)
13.5 µs ... 20.2 µs (A501k)
d = 1 µs ... 3 µs (A504k)
d = 1.25 µs ... 3.75 µs (A503k)
d = 6.9 µ ... 20.2 µs (A501k)
f =

2 µs (A504k)
f =

2.5 µs (A503k)
f =

5 µs (A501k)
Integrate
Enabled
p = Timer 1
TIMING CHARTS ARE NOT DRAWN TO SCALE
g =

2 µs (A504k)
g =

2.5 µs (A503k)
g =

5 µs (A501k)