CAMERA LINK Q-2A340, Руководство по эксплуатации и инструкция пользователя

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OPERATING AND USER MANUAL QUARTZ SERIES
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Acquisition modes 7.
Modes of operation 7.1
The camera operates in one of the four acquisition modes, selectable by the MO command (section
8.4.1).
In this chapter each mode is described. Basic formulas for sensor readout and frame readout over
Camera Link are presented below.
Inbetween acquisition from sensor and image transfer through the Camera Link interface, there is a
buffer memory, which enables decoupling of sensor image acquisition and interface data transmission.
The time needed to read a single line from the sensor: •
Q-2A340 Q-4A150 Q-4A180 Q-12A65
t
ROW,SENSOR
2,69 µs 2,69 µs 2,69 µs 4,3 µs
FOT 27 µs 27 µs 27 µs 97 µs
Values of Frame Overhead Time for different cameras. Table 7.1:
The time needed to read an image from the sensor, where the FOT is the Frame Overhead Time •
listed in the table above for the different sensors:
The time needed to output an image over the Camera Link interface: •
Where FVALGap is the set frame delay time by command FVALGAP (section 9.6.4) and LVALGap
is the set line delay time by command OFRM (section 9.6.3).
OVLh is 1 if the image overlay is configured to output an extra line (OVL2 or OVL3), else 0.
NOTE: If either LVALgap or FVALgap does not meet the required time to output a video line at the
Camera Link output, the set value will be increased automatically to the minimum valid value. See also
Chapter 7.2 Continuous mode for further elaboration.
NOTE: If the on-camera frame averaging is enables, this naturally reduces the datarate over the
interface by a factor equal to the number of averaged frames.
sensor row height FOT sensor IMG
t ROI t t
, ,
⋅ + =
s
f
FValGap LValGap LValGap
N
ROI
OVL ROI
t
rface clock,inte
Taps
width
h height
Interface IMG
µ
10
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,
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