Photon Focus MV3-D640I-M01-144-CL, User Manual, Page: 28 / 121

4 Image Acquisition
Exposure Start Trigger Mode = off The exposure start triggers are ignored.
The exposure start trigger is only available, when the exposure mode is set to
"trigger controlled". The camera sets the trigger modes of this trigger automat-
ically to on, when the exposure mode is set to "trigger controlled" and vice versa
to off when the exposure mode is set to "timed".
4.4.3 Exposure End Trigger
The exposure end trigger is used to terminate an exposure active exposure cycle.
Exposure End Trigger Mode = on An activated exposure cycle will be terminated and the
image read out will be started, as soon as an exposure end trigger has been received. The
"Exposure Active" status goes to inactive. Exposure end triggers are only processed, when
an exposure start trigger has started a trigger controlled exposure cycle previously.
Exposure End Trigger Mode = off The exposure end triggers are ignored.
The exposure end trigger is only available, when the exposure mode is set to
"trigger controlled". The camera sets the trigger modes of this trigger automat-
ically to on, when the exposure mode is set to "trigger controlled" and vice versa
to off when the exposure mode is set to "timed".
Fig. 4.9 shows procedure of a trigger controlled exposure mode. The Acquisition start trigger
mode is off. The camera goes directly into status "Frame Trigger Wait" once the acquisition
status has been executed. An exposure of a new frame is started as soon as an exposure start
trigger has been received. The exposure ends with an exposure end trigger.
A
c q u i s i t i o n A c t i v e
F r a m e A c t i v e F r a m e T r i g g e r
W a i t F r a m e T r i g g e r
W a i t F r a m e T r i g g e r
W a i t
A
c q u i s i t i o n S t a r t ( ) A c q u i s i t i o n S t o p ( )
E x p o s u r e 1 R e a d O u t 1
F r a m e 1
E x p o s u r e S t a r t
T r i g g e r 1 E x p o s u r e E n d
T r i g g e r 1
F r a m e A c t i v e
E x p o s u r e 2 R e a d O u t 2
F r a m e 2
E x p o s u r e S t a r t
T r i g g e r 2 E x p o s u r e E n d
T r i g g e r 2
E x p o s u r e
A c t i v e E x p o s u r e
A c t i v e
A c q u i s i t i o n S t a r t T r i g g e r M o d e = O f f
A c q u i s i t i o n E n d T r i g g e r M o d e = O f f
F r a m e S t a r t T r i g g e r M o d e = O f f
F r a m e B u r s t S t a r t T r i g g e r M o d e = O f f
E x p o s u r e M o d e = T r i g g e r C o n t r o l l e d
Figure 4.9: Trigger Controlled Exposure Mode
4.4.4 Exposure Control Output Signals
The frame control block has the following output signals:
Exposure Active
An asserted exposure active signal indicates, that a exposure time of a current
frame is active.
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