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Operation and Features
3.4.2.3 Guidelines When Using Free-run
When using free-run mode to control exposure, several general guidelines must be followed:
• The line period must not be lower than the minimums shown in Table 3-4.
Video Data Output Mode
L401k
Single tap (no two-line averaging)
141.733 µs
141.86 µs
Dual tap (no two-line averaging)
-
70.93 µs
Dual separated tap (no two-line averaging)
-
70.93 µs
283.466 µs
141.86 µs
Dual tap (with two-line averaging)
-
141.86 µs
Dual separated tap (with two-line averaging)
-
141.86 µs
Single tap (with two-line averaging)
L402k
Table 3-4: Minimum Line Periods
• In the free-run programmable mode, the minimum exposure time and the maximum exposure time must be within the limits specified in the Exposure Time CSR (see page 4-14).
L
We strongly recommend using an exposure time that is at least 10% of the
line period. Exposure times shorter than 10% of the line period will increase
the non-linearity of the camera’s response.
• When you are operating the camera in free-run, using the edge-controlled mode will give you
the best performance in terms of signal-to-noise ratio.
3.5 Integrate Enabled Signal
An output signal called Integrate Enabled (IntEn) is available on L400k cameras. The integrate
enabled signal indicates that an exposure is taking place. The signal will go high when each
exposure begins and go low when the exposure ends. The characteristics of the signal are
described in more detail in Section 2.5.6.
3-10
Basler L400k