Dummy Test Row; Led Status - Dalsa 1M28-SA User Manual

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The image is read out after the exposure time has elapsed. After readout, the sensor returns to the
reset state and the camera waits for a new trigger pulse.
The data is output on the rising edge of the pixel clock. The signals FRAME_VALID (FVAL) and
LINE_VALID (LVAL) mask valid image information. The signal INTEGRATION indicates the
active integration phase of the sensor. The number of clock pulses after exposure CPRE is defined
by the calculation of the frame time (see section 1.12 Calculating Frame Rate).
Figure 28: Triggered Mode with External Edge Triggered Exposure Control
EXSYNC
INTEGRATION

2.10 Dummy Test Row

For testing the readout chain a row of test pixels has been implemented on the sensor chip. The
pixels in this row are fixed to a pattern of black and white pixels. This row can be read out in place
of row 1023, at the beginning of the frame. Note: The camera powers up with the dummy test row
turned off. For information on turning the dummy test row on, refer to Table 17 on page 43.

2.11 LED Status

A status LED on the backside of the camera provides the following information about the state of
the camera:
•
•
•
•
•
03-32-00525-04
PRELIMINARY
PCLK
PRIN
FVAL
LVAL
DATA
In normal operation mode, the LED shows a green light while valid data is read out.
At slow frame rates the LED blinks with the FVAL signal.
At high frame rates the LED changes to an apparently continuous green light, with intensity
proportional to the ratio of readout time over frame time. In some circumstances, (for
example, a relatively long frame time and a very small ROI setting) the pulse of the LED
might be too short to be visible in daylight conditions, even if the camera is working properly.
If the data read out from the sensor is not within the ADC conversion range (over or under
exposed), the LED changes to red while the saturated data is read out.
The status LED changes to red while the serial communication is active.
EXSYNC is ignored in mode constant image data rate
CPRE
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