Eclipse EC-11-xxx40 - C7 Setting Data Rate (EXRCLK); C8 Setting Gains

40 EC-11User’s Manual
03-32-00418-05 DALSA Corp.
C7 Setting Data Rate (EXRCLK)
The camera's data rate can be set to one of three internal data rates or to the external read
clock (EXRCLK).
To set the data rate to internal 40MHz, use the command
set_rclk_select 0.
To set the data rate to internal 20MHz, use the command
set_rclk_select 1.
To set the data rate to internal 10MHz, use the command
set_rclk_select 2.
To set the data rate to external read clock, use the command
set_rclk_select 3.
When setting the camera to its external clock, EXRCLK must be supplied.
The internal command
set_sync_frequency is disabled when EXRCLK has been
selected. The command
set_sync_counter can be used to set line rate internally.
Optimizing Offset Performance
To set the analog offset of the camera, use the command set_analog_offset. Offset
values range from 0 to 1023. The offset increases with higher values. The resulting analog
offset value depends on other camera parameters such as temperature, line rate, and gain.
The offset for the forward and reverse direction and for calibrated and uncalibrated video
is set and saved separately.
To subtract the offset or any other background from the output video signal, use the
set_subtract_background command. Subtracted values range from 0 to 511. The
values for the forward and reverse direction are set and saved separately. Note, when
subtracting a digital value from the digital video signal the output can no longer reach its
maximum. Use the system gain function to correct for this.
To subtract the offset from the video signal in the calibrated mode only, prior to the
PRNU correction, use the
set_digital_offset command. Subtracted values range
from 0 to 511. The values for the forward and reverse direction are set and saved
separately.
Calibrating Offset
To calibrate the analog offset, use the calibrate_analog_offset command. Values
range from 0 to 100DN. This command sets offset in uncalibrated mode.
C8 Setting Gains
To set the analog gain portion of the camera in forward and reverse direction, use the
set_gain command and specify the gain setting. A gain value of 0 sets the camera to its
nominal gain (0dB). The specified gain value range is from –8.5 to 9.5.
To set the digital gain, following a background subtraction, use the
set_system_gain
command and specify the gain setting. The gain ranges are 0 to 511 (equal to a gain from
1 to 1.999).