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

Basic Operation and Features

3.3.2.2 ExSync, Level-controlled Mode with Synchronous/Asynchronous

Timing

ExSync
Frame
Valid
Line
Valid
Integrate
Enabled
TIMING CHARTS ARE NOT DRAWN TO SCALE
Figure 3-13: ExSync, Level-controlled Mode - Exposure Start when Frame Valid is High, Exposure
Stop when Frame Valid is Low
The ExSync signal goes high while the Frame Valid signal is high and it goes low while the Frame
Valid signal is low. 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 3-13):
• The effective exposure starts d microseconds after the fall of the ExSync signal (exposure
start delay).
• Disregarding possible jitter, the duration of the effective exposure is defined by period p.
• Jitter may shorten (f) or extend (g) the effective exposure, i.e.
duration of the effective exposure = (p - f) to (p + g).
p
d
f
g
3-16
PRELIMINARY
p
d = 1.8 µs ... 5 µs (A504k)
d = 1.8 µs ... 6.25 µs (A503k)
d = 6.8 µs ... 20 µs (A501k)
p
f =  2 µs (A504k)
f =  2.5 µs (A503k)
f = 13 µs (A501k)
k k
A504 A503
Exposure as set by ExSync
1.8 µs ... 5 µs 1.8 µs ... 6.25 µs
 
2 µs 2.5 µs
0 µs 0 µs
ExSync Period
3.3 µs (A504k)
3.8 µs (A503k)
20.8 µs (A501k)
g = 0 µs (A504k)
g = 0 µs (A503k)
g =  0.2 µs (A501k)
k
A501
6.8 µs ... 20 µs

13 µs

0.2 µs
k
Basler A500