Basler A400K Manual de usuario descargar pdf (Pagina 66)

Acquisition Control AW00118501000

58 Basler racer Camera Link

Exposure Start and Exposure End Delays

When the line start trigger mode is set to on and an input line is selected as the source signal for

the line start trigger, there is a delay between the transition of the line start signal and the actual

start of exposure. For example, if you are using the timed exposure mode with rising edge

triggering, there is a delay between the rise of the signal and the actual start of exposure.

There is also an exposure end delay, i.e., a delay between the point when exposure should end as

explained in the diagrams on the previous page and when it actually does end.

The base exposure start and end delays are as shown in Table 9:

There is also a second component to the start and end delays. This second component is the

debouncer setting for the input line. The debouncer setting for the input line must be added to the

base start and end delays shown in Table 9 to determine the total start delay and end delay.

For example, assume that you are using an ruL2048-48gm camera and that you have set the line

start trigger mode to on. Also assume that you have selected input line CC1 as the source signal

for the line start trigger and that the debouncer parameter for line CC1 is set to 5 µs. In this case:

Total Start Delay = Start Delay Value from Table 9 + Debouncer Setting

Total Start Delay = 1.5 µs + 5 µs

Total Start Delay = 6.5 µs

Total End Delay = End Delay Value from Table 9 + Debouncer Setting

Total End Delay = 1.2 µs + 5 µs

Total End Delay = 6.2 µs

raL2048-

80km

raL4096-

80km

Start Delay 1.5 µs 1.5 µs

End Delay 1.2 µs 1.2 µs

Table 9: Base Exposure Start and End Delays

If you are using a GenICam compliant tool such as the Basler pylon Viewer and

you attempt to set the exposure time to exactly the minimum allowed or to exactly

the maximum allowed, you will see unusual error codes. This is an artifact of a

rounding error in the GenICam interface architecture. As a work around, you could

set the exposure time slightly above the minimum or below the maximum. Values

between the minimum and the maximum are not affected by the problem.

When using the frequency converter, the delay values may slightly differ from

those given in Tab le 9.

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Basler A400K Manual de usuario Pagina 66