User`s manual

Basic Operation and Features
3-28 Basler A500k
PRELIMINARY
3.3.4.4 Free-run Mode with Synchronous Timing 2
Figure 3-23: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 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 3-23):
• 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 set by Timer 1
d
0.8 µs 0.8 µs 0.8 µs
f
 2 µs  2.5 µs  7 µs
g
 2 µs  2.5 µs  7 µs
m
2 µs 2.5 µs 13.2 µs
p = Timer 1
Internal
Control
Signal
Internal Control Signal Period
Timer 2
4 µs ... 6 µs (A504k)
5 µs ... 7.5 µs (A503k)
27.4 µs ... 39.4 µs (A501k)
Frame
Valid
Line
Valid
44 ns (A504k)
60 ns (A503k)
300 ns (A501k)
d = 0.8 µs
f =

2 µs (A504k)
f =

2.5 µs (A503k)
f =

7 µs (A501k)
Integrate
Enabled
p = Timer 1
TIMING CHARTS ARE NOT DRAWN TO SCALE
g =

2 µs (A504k)
g =

2.5 µs (A503k)
g =

7 µs (A501k)