End Trigger Input Controls

Applies to:

The end trigger signal can originate from the following type of devices:

1.

A TTL compatible detector attached to the TRG input port or to the ALT2 Isolated I/O port

2.

A 12V CMOS compatible device attached to the ALT2 Isolated I/O port

Sourcing device type	End TrigCtl	Input Port	EndTrigLine
TTL	TTL	TRG	NOM
TTL and 12V CMOS	ITTL I12V	A2	NOM

To select a port:

1.

Set the value of the EndTrigCtl parameter corresponding to the electrical style of the sensor device used as trigger source.

Note: The unique and default value of EndTrigLine is NOM.

The hardware end trigger input ports are available on the System I/O Connector

Applies to:

The end trigger signal can originate from the following type of devices:

2.

A TTL compatible detector attached to any of the four Enhanced I/O ports or any of the two Isolated I/O ports

3.

A 12V CMOS compatible device attached to any of the two Isolated I/O ports

4.

A LVDS or RS-422 compatible detector attached to any of the two differential input ports

Sourcing device type	EndTrigCtl	Input Port	EndTrigLine
TTL	TTL	Enhanced IO1	NOM or IO1
		Enhanced IO2	IO2
		Enhanced IO3	IO3
		Enhanced IO4	IO4
TTL and 12V CMOS	ITTL I12V	IsoA1	NOM or ISOA1
		IsoA2	ISOA2
LVDS or RS-422	LVDS	TRA1	NOM or TRA1
		TRA2	TRA2

To select a port:

1.

Set the value of the EndTrigCtl parameter corresponding to the electrical style of the sensor device used as trigger source.

2.

Optionally, set the value of the EndTrigLine parameter corresponding to the I/O port used to attach the trigger detector.

Note: The default value of EndTrigLine is NOM.

The hardware trigger input ports are available on the (External) System Connector and on Internal System Connector

Applies to:

The end trigger signal can originate from the following type of devices:

3.

An RS-422 compatible detector attached to any of the two high-speed differential input ports belonging to the channel or ...

4.

... another type of device attached to any of the 4 isolated current-sense input ports belonging to the channel.

Sourcing device type	EndTrigCtl	Input Port	EndTrigLine
RS-422 compatible detector	DIFF	Diff. Input #2	NOM
		Diff. Input #1	DIN1
		Diff. Input #2	DIN2
Other detectors	ISO	Isolated input #2	NOM
		Isolated input #1	IIN1
		Isolated input #2	IIN2
		Isolated input #3	IIN3
		Isolated input #4	IIN4

To select a port:

1.

Set the value of the EndTrigCtl parameter corresponding to the electrical style of the sensor device used as end trigger source.

2.

Optionally, set the value of the EndTrigLine parameter corresponding to the I/O port used to attach the end trigger detector.

Note: The default value of EndTrigLine is NOM.

Applies to:

The hardware signal issued from differential inputs only flows through a digital filter that removes any pulse narrower than its time constant.

The filter strength is configurable in 3 steps by means of the EndTrigFilter parameter. Each step corresponds to a specific filter time constant.

EndTrigFilter	Time Constant
OFF	100 nanoseconds
ON or MEDIUM	500 nanoseconds
STRONG	2.5 microseconds (Default value)

To avoid unexpected loss of end trigger events, check that the selected time constant is shorter than the end trigger pulse width sent by the detector!

Product specific notes

Product	Description
	The value OFF is not allowed for isolated ports A1 and A2
	The value OFF is not allowed for isolated ports IsoA1 and IsoA2
	There is no digital filter for isolated inputs.

A end trigger event is generated on a positive-going or a negative-going transition of the electrical signal.

To select the transition, set accordingly the value of the EndTrigEdge parameter:

EndTrigEdge	Description
GOHIGH	The end trigger event is generated at each positive-going transition of the trigger line
GOLOW	The end trigger event is generated at each negative-going transition of the trigger line

The default value for EndTrigEdge is GOLOW.

For (TDI) line-scan cameras operated with the LONGPAGE acquisition mode, the hardware page end trigger signal can be delayed by a user-programmable number of captured lines.

The following table shows the control parameter, its value range and its default value:

AcquisitionMode	Parameter	Value Range	Default Value
LONGPAGE	EndPageDelay_Ln	0 to 65,534 lines	0

Note: The "number of captured lines" is equal to the "number of camera cycles" when the frame grabber is configured to capture all lines. When the frame grabber performs "downweb resampling", the "number of captured lines" might be different than the "number of camera cycles".

Note: When the downweb line rate is linked to the web speed through an encoder, the delay expressed as a number of captured lines represents a fixed length on the web.!