Basler A500k User Manual page 59

The synchronous/asynchronous timing is described in sections 3.3.2.2, 3.3.3.2, and
for each exposure mode.
Synchronous Timing 1: The time that frame valid is low between two subsequent frames
corresponds to the time of one and a half lines. Exposure of frame N+1 starts during readout
of frame N while frame valid is high. Readout of frame N+1 is triggered during transmission of
the last line of frame N, i.e. while frame valid and line valid of the last line are high.
To let the camera operate with this timing, set the frame rate and the exposure time that the
following conditions are met:
The synchronous timing 1 is described in sections 3.3.1.2, 3.3.2.3, 3.3.3.3, and
each exposure mode.
• Synchronous Timing 2: This is the fastest timing. Frame valid is low for 3 (A504
4 (A503k) or 15 (A501
N+1 starts during readout of frame N while frame valid is high. Readout of frame N+1 is trig-
gered during readout of the next to the last line of frame N, i.e. while frame valid is high and
line valid of the next to the last line is high. To let the camera operate with this timing, set the
frame rate and the exposure time that the following conditions are met:
Frame Period
The synchronous timing 2 is described in sections 3.3.1.3, 3.3.2.4, 3.3.3.4, and
each exposure mode. Also see section
achieve this exposure mode at full AOI.
The following sections describe the detailed timing of the exposure time control modes depending
on the selected frame rate and exposure time.

The following values are valid for all timing diagrams:
ExSync drives the internal camera control signal. The internal control signal takes
less than 200 ns to react to ExSync in the A504
the A501
The minimum exposure time is 10 µs for all modes.
Line valid rises after frame valid has risen (see Figure 2-8 to Figure 2-13).

The following timing diagrams all show an Integrate Enabled signal:
The Integrate Enabled signal is high during effective exposure, i.e. when charges are
actually accumulated by the sensor.
The FlashOut signal can be tied to the Integrate Enabled signal and transmitted out
of the camera (see section 2.1.4).
k
Basler A500
PRELIMINARY
Frame Period < Frame Valid High + 3 µs for A504k (or 3.75 µs for A503k or
20.2 µs for A501k)
Frame Period > Frame Valid High + 44 ns for A504k (or 60 ns for A503k or
300 ns for A501k)
) pixel clocks between two subsequent frames. Exposure of frame
k
Frame Period < Frame Valid High + 44 ns for A504k (or 60 ns for A503k or
300 ns for A501k)
1

--------------------------------------------- -
Max. Frame Rate
.
k
Basic Operation and Features
3.5 on how to set frame rate and exposure time to
and A503
k
3.3.4.2
3.3.4.3 for
) or
k
3.3.4.4 for
, and less than 1 µs in
k
3-9