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...

As

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described

...

in

...

,

...

ScanImage

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3.5

...

allows

...

the

...

user

...

to

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specify

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a

...

single

...

primary

...

trigger

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input

...

per

...

board,

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using

...

the

...

INI

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file

...

Rig

...

Configuration

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variable

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triggerInputTerminal

...

.

...

ScanImage

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3.5

...

also

...

adds

...

the

...

ability

...

to

...

specify

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a

...

distinct

...

terminal

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input

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as

...

the

...

external

...

trigger

...

input.

...

This

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allows

...

ScanImage

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acquisitions

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to

...

be

...

triggered

...

by

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any

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external

...

software

...

which

...

generates

...

a

...

trigger

...

signal

...

(TTL

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rising

...

edge),

...

e.g.

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Ephus

...

.

(tick) As with the trigger input terminal, ScanImage 3.5

...

assumes

...

the

...

external

...

trigger

...

input

...

terminal

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applies

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for

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all

...

boards.

...


(tick) See Typical DAQ Board Wiring in Appendix 2 for drawings/photos

...

of

...

typical

...

board

...

connections

...

The

...

selection

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of

...

whether

...

the

...

primary

...

or

...

external

...

trigger

...

is

...

used

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occurs

...

in

...

the

...

Main

...

Controls

...

window:

{:=
Panel
title
Main Controls
Controls}
Wiki Markup

{center}[!ScanImage Pics^r3_5_MainControls_externalLoop.png|height=200!|ScanImage Pics^r3_5_MainControls_externalLoop.png]{center}

When the *EXT* toggle button is depressed (as shown here), all ScanImage boards await their trigger on the _external trigger input terminal_ during GRAB/LOOP acquisitions (but not FOCUS acquisitions).
Otherwise, all boards await their trigger on the _trigger input terminal_ (which is generally connected to the trigger line output generated by ScanImage).
Panel
bgColor#DDFFFF
titleINI File _Rig Configuration_ Changes
{panel} {panel:title=INI File _Rig Configuration_ Changes|bgColor=#DDFFFF}
Wiki Markup

{center}{link-window:ScanImage Files^r3_5_standardINI_rigConfig.txt|target="_blank"}View _Rig Configuration_ Section of Model INI File{link-window}{center}
h5. New Variables
*externalTriggerInputTerminal*: Specifies the single _Programmable Function Interface (PFI) terminal_ which the acquisition, mirror, and Pockels Cell board(s) can all use as their optional external trigger input, which can be enabled from the *Main Controls* window.

*externalTriggerTimeout*: Specifies time to wait for external trigger input to arrive. When value is _Inf_ (default), ScanImage will wait indedfinitely for the external trigger signal to arrive following a GRAB/LOOP start.
{panel}