Basler Vision Technologies Sprint Series, Руководство пользователя

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Line Acquisition Modes
42 Basler sprint Mono Cameras
Two ExSync Signal Cycles Required
If you have the camera set for a dual line [max 140 kHz] acquisition mode and are you using an
ExSync signal to trigger line acquisition, you should be aware that two cycles of the ExSync signal
are required to acquire and transmit the two lines in the sensor.
Assuming that you have the camera set for the Line A First mode, the first cycle of the ExSync signal
will:
„
trigger the start of image acquisition (i.e., exposure) on BOTH lines in the sensor. The
exposure time you are using will apply to BOTH lines.
„
time the start of pixel data readout for both lines.
„
time the start of transmission of line A pixel data.
The second cycle of the ExSync signal will be used to:
„
time the start of transmission of line B pixel data.
The time line shown in Figure 15 illustrates this situation when an ExSync signal is used to trigger
line acquisition, the camera is set for programmable exposure, and the camera is set for Dual Line
[ Max 140 kHz ] - Line A First. The figure shows what occurs through two cycles of the ExSync
signal.
For more information about triggering line acquisition and controlling exposure, see Chapter 4 on
page 67 .
Fig. 15: Dual Line Acquisition with ExSync Programmable Exposure and Line A First
Line A and Line B
Acquired
Line A and Line B
are Read Out
Line A Data
Transmitted
to the Grabber
Line B Data
Stored in Buffer
ExSync
Programmed
Exposure
Time
Line B Data
Transmitted
to the Grabber
Time From Rise of ExSync to Start of
Data Transmission Will Be Equal