Guidelines When Using An Exsync Signal; Selecting An Exsync Exposure Mode & Setting - Basler A400K User Manual

• In ExSync programmable mode, the rising edge of ExSync triggers exposure and charge
accumulation for a pre-programmed period of time. The frame is read out and transferred at
the end of the pre-programmed period. The length of the pre-programmed exposure period is
determined by the exposure time setting.
The falling edge of ExSync is irrelevant (see Figure 3-5).
Figure 3-5: ExSync Programmable Mode

3.3.1.2 Guidelines When Using an ExSync Signal

In ExSync edge-controlled mode and programmable mode, minimum high time for the ExSync
signal is 2 µs, minimum low time 2 µs. In ExSync level-controlled mode, minimum high time for
the ExSync signal is 9.12 µs, minimum low time 4.56 µs.
In ExSync programmable mode, the minimum exposure time setting is 4.56 µs. Due to the sensor
design, the exposure time can only be set in integer multiples of 4.56 µs, that is, 4.56 µs, 9.12 µs,
13.68 µs, and so on.
Exposure Start Delay
When an exposure is triggered by the ExSync signal, the actual start of exposure will be slightly
delayed. (This is commonly referred to as an exposure start delay.) The exposure start delay will
vary from exposure to exposure, but will always fall in a range from 200 ns to 4.76 µs.
3.3.1.3 Selecting an ExSync Exposure Mode & Setting the Exposure Time
You can select an ExSync exposure time control mode and set the exposure time for the ExSync
programmable mode by using the Camera Configuration Tool Plus (CCT+) or by using binary write
commands from within your own application to set the camera's control and status registers
(CSRs).
With the CCT+
With the CCT+ (see Section 4.1), you use the Exposure Time Control Mode setting in the
Exposure parameter group to select the ExSync edge-controlled, ExSync level-controlled or
ExSync programmable exposure time control mode. If you select the ExSync programmable
mode, the CCT+ will also let you enter an exposure time.
By Setting CSRs
You can select the exposure time control mode by writing a value to the Mode field of the Exposure
Time Control Mode CSR (see page 4-15).
If you select the ExSync programmable mode, you will also need to set the exposure time. You
can set the exposure time by writing a value to the Raw Exposure Time field or to the Absolute
Exposure Time field of the Exposure Time CSR (see page 4-16).
Basler A400k
DRAFT
Basic Operation and Features
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