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Line Trigger Source Selection for Linescan
Applications
Linescan imaging applications require some form of external event trigger to synchronize linescan camera exposures to the moving object. This synchronization signal is either an external trigger source
(one exposure per trigger event) or a shaft encoder source composed of a single or dual phase
(quadrature) signal. The X64-CL iPro shaft encoder inputs provide additional functionality with pulse drop or pulse multiply support.
The following table describes the line trigger source types supported by either the X64-CL iPro or
X64-CL iPro\Lite boards. Refer to the Sapera Acquisition Parameters Reference Manual (OC-SAPM-
APR00) for descriptions of the Sapera parameters.
CORACQ_PRM_EXT_LINE_TRIGGER_SOURCE – Parameter
Values Specific to the X64-CL iPro series
PRM Value Active Shaft Encoder Input
4
5
2
3
0 Default
1 Use phase A
Use phase B
Use phase A & B
6
From Board Sync
Phase A & B, shaft encoder after pulse drop/multiply output to
Board Sync
Phase A & B, camera line trigger output to Board Sync
X64-CL iPro Series User's Manual
X64-CL iPro Reference • 59
CORACQ_PRM_EXT_LINE_TRIGGER_SOURCE full description relative to trigger type and X64-CL iPro configuration used:
PRM
Value
X64-CL iPro configuration & camera input used
External Line Trigger Signal used
External Shaft Encoder Signal used
1
0
Dual - Camera #1
Dual - Camera #2
Medium - Camera #1
Dual - Camera #1
Dual - Camera #2
Medium - Camera #1
2
Dual - Camera #1
Dual - Camera #2
Medium - Camera #1
3, 5, 6
Dual - Camera #1
Dual - Camera #2
4
Medium - Camera #1
Dual Camera #1
Dual Camera #2
Medium Camera #1
if
CORACQ_PRM_EXT_LINE_
TRIGGER_ENABLE = true
Shaft Encoder Phase A
Shaft Encoder Phase B
Shaft Encoder Phase A
Shaft Encoder Phase A
Shaft Encoder Phase A
Shaft Encoder Phase A
Shaft Encoder Phase B
Shaft Encoder Phase B
Shaft Encoder Phase B n/a n/a n/a
From Board Sync
From Board Sync
From Board Sync
See "
J4: External Signals Connector
" on page 95 for shaft encoder input connector details.
CVI/CCF File Parameters Used
• External Line Trigger Source = prm value
• External Line Trigger Enable = true/false
• Shaft Encoder Enable = true/false
if
CORACQ_PRM_SHAFT_
ENCODER_ENABLE =true
Shaft Encoder Phase A
Shaft Encoder Phase B
Shaft Encoder Phase A & B
Shaft Encoder Phase A
Shaft Encoder Phase A
Shaft Encoder Phase A
Shaft Encoder Phase B
Shaft Encoder Phase B
Shaft Encoder Phase B
Shaft Encoder Phase A & B
Shaft Encoder Phase A & B
Shaft Encoder Phase A & B
From Board Sync
From Board Sync
From Board Sync
60 • X64-CL iPro Reference
X64-CL iPro Series User's Manual
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