6M18 Camera User’s Manual
29
DALSA
03-32-10017-03
!
For a given frame rate, the maximum integration time is limited to the frame period less an
overhead factor required for proper operation of the CCD. Maximum integration time is defined
by this equation:
Integration Time < (1/Frame Rate) – Readout Time
This equation is valid for all binning modes, free running, external trigger and external integrate
modes.
Note that binning mode impacts the Read Time and limits Integration Time.
WARNING:
Do not set integration time higher than the limits of the equation above. Unpredictable
operation may result
Table 18: Integration/Frame Rate Limits
Vertical
Binning
Read out Time
(mS)
Max Frame Rate
Data Rate (MHz)
1 x
53.8
18
4 x 40
2 x
34.2
28
4 x 20
4 x
24.2
39
4 x 10
The default integration time was chosen to give a frame rate of 18 fps (see section
3.14
Controlling Frame Rate
). Changing the integration time involves writing to the three integration
time registers.
3.13 Controlling Integration
The 6M18 allows you to control integration (also known as exposure time) in five ways.
•
Programmed Integration/Free Running:
(default) The camera free runs with the internally
programmed integration time and frame rate
•
Programmed Integration/SMA Trigger:
The camera will integrate for the internally
programmed time when triggered by a TTL high pulse on the SMA connector.
•
Programmed Integration/Serial trigger:
The camera will integrate for the internally
programmed time when triggered by high signal on the serial interface.
•
External Integration/SMA Trigger:
The camera will integrate as long as the TTL pulse on
the TRIGGER IN SMA connector is high. The integration time is effectively the input pulse
width. In this mode, TRIGGER IN also controls the frame rate.
•
External Integration/Serial Trigger:
The camera will integrate as long as the serial bit is
held high. The integration time is effectively the input pulse width. In this mode, the serial
signal also controls the frame rate. Due to variation in the host operating system, this mode is
generally used only for camera setup and functional testing.
The register settings required for each mode are defined in the following table.
Summary of Contents for Dalsa DS-4x-06M18
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Page 42: ...6M18 Camera User s Manual 42 DALSA 03 32 10017 03 V Video Timing 19 VSYNC 16 W Warranty 43 ...
