Page 31
DE-M060304E • DEWE-ORION-1616-10x • Technical Reference Manual • Printing version 1.2.0 • March 19, 2014
DEWE-ORION-1616-10x
2.6 Clock and trigger I/O
The DEWE-ORION-1616-10x allows external triggering for start of the acquisition using the pin EXT_Trigger.
The default detection for the trigger signal is the rising edge but can be configured to falling or both edge
(change of input signal) detection. Changing the direction to output, the start of acquisition can be indicated.
EXT_CLKx are used as standard for hardware synchronization to DEWE-CAM, CAN or 3
rd
party hardware.
Each output can set individually. The predefined settings are:
Video:
The output frequency is automatically set to the frame rate of the selected video device. If no
camera is selected, the output is disabled
CAN:
The signal is automatically set for hardware synchronisation of NI-CAN device. If no CAN
device is selected, the output is disabled
FAN:
This allows to switch off the system FAN during storing the data. This specially feature is
important for sound measurement and needs to be ordered separately.
Fixed:
Outputs the entered frequency synchronized to the sample clock oscillator based on a 12.8
MHz divider. The output starts and stops with the acquisition. The selection of “continuous
out” allows to output the clock rate also after the acquisition is stopped. Continuous out
selection at signal EXT_CLK starts also the acquisition always synchronised with the rising
edge of the output.
Note: This output frequency is only synchronized to the sample frequency at the master board
ADC_CLK:
Outputs the actual sample frequency. The selection “continuous out” is only allowed at the
master board (board 0).
The default settings for the master board are:
EXT_CLK1:
Video
EXT_CLK2:
CAN
EXT_CLK:
Off
Содержание DEWE-ORION-1616-10 Series
Страница 56: ...C2 Notes...
