NED
UME-0041-01 XCM20125GIG
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4.6.3 External Trigger Exposure Mode (Trigger Level)
In External Trigger Exposure Mode (Trigger Level), the exposure time is set by the
“H” level of the external trigger (Line Trigger), the scan period is set by the period of
the external trigger signal, and the exposure start is set by the rising edge of the
external trigger signal. The possible range of exposure time, and the relationship
between the timing of the external trigger signal and exposure is explained below.
As with free run exposure mode, the minimum scan cycle changes depending on
the image format.
Table 4-6-3
External Trigger
（
Trigger Level
）
Exposure Mode Time Setting
Item
Symbol
Less than central
1024 pixels
All other cases
Trigger pulse High time
T1
≧8.6
≧17.2
Trigger pulse Low time
T2
≧1.7
Trigger pulse cycle (scan rate)
T3
≧10.3
≧18.8
(Unit
: μs)
①
②
③
External Trigger
pulse (Line Trigger)
T1
T2
T3
Exposure
①
②
③
T1
Figure 4-6-3 External Trigger Exposure Mode (Trigger Level)
4.7 Test Pattern
The test pattern function allows you to check that data is being transferred
correctly from the camera.
Figure 4-7-1 Test Image Selector Register (image from GigEGrab)
