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Quadrus EZ Reader User’s Manual
CCD Image Sensor
CCD Image Sensor
Configures the operation of the CCD image sensor. Typically most of these parameters
will be adjusted during the calibration process and do not need to be modified directly by
the user.
Note that the Quadrus EZ may have one of two types of image sensors, CCD or CMOS.
Even though some of the parameters between the sensors are similar, they are configured
independently with different configuration commands. Therefore, the user needs to know
which sensor type is installed in the Quadrus EZ. To find the sensor type, send
<op,10> .
The reader will reply with a status report that includes the message: “SENSOR=CCD” or
“SENSOR=CMOS.”
Gain (CCD)
Shutter Speed (CCD)
Note for CCD readers: When Live video mode is active, in order to synchronize with the
video format, a shutter time of 1/1000 is the lowest shutter speed setting that can be
applied to the camera settings. Slower shutter speeds will disable the video output.
Usage: Can be used to adjust pixel gray scale values for readability.
Definition:
The CCD has a programmable gain amplifier (PGA) that controls the
amount of gain applied to the pixel gray scale value, prior to output. This
value can vary depending on lighting conditions and shutter speed.
Serial Cmd: < K540, shutter speed, gain >
Default: 550
Options: 0 to 1023
Usage:
Faster shutter speeds reduce blurring in faster applications.
Slower shutter speeds are useful in slower and lower contrast applications.
Definition:
Shutter speed is the time, in fractions of a second, that the CCD sensor is
exposed to light.
Serial Cmd: < K540,shutter speed ,gain>
Default: 1000 (1/1000 second)
Options: 50 to 50,000