Princeton Instruments PI-MAX4 - Figure 9-8: Trigger Expander; Figure 9-9: Timing Diagram: Pre-Trigger, Single Trigger (Readout Per Trigger)

Chapter 9 LightField and Dual Image Feature 163
Within LighField, the nominal delay from the Pre-Trigger pulse to the event of interest is
configured on the
Trigger expander. When the trigger Source is configured to be External,
and
Anticipate Trigger is enabled, the nominal delay, which must be  86 S, is configured
in the
Delay from Pre-Trigger parameter, and the actual delay must be within 2 S of this
configured value. See Figure 9-8.
Figure 9-8: Trigger Expander
LightField calculates all required timing, including Timing Generator settings. Figure 9-9
and Figure 9-10 illustrate the timing diagrams for Single and Dual Trigger applications.
Figure 9-9: Timing Diagram: Pre-Trigger, Single Trigger (Readout Per Trigger)
4411-0139_0102
t
PT
PRE-TRIGGER
IMAGES
TRIGGER
D1
W1
PD
Shift Behind
Mask
FIRST FRAME
PD
D2
W2
SECOND FRAME
t
PT
: Time between Pre-Trigger and
Shift Behind Mask PS ± 2 PS)
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3'3KRVSKRU'HFD\7LPH
W1: Pulse 1 Gate Width
D2: Inter-Pulse Gate Delay
3'3KRVSKRU'HFD\7LPH
W2: Pulse 2 Gate Width
Pre-Trigger
Jitter
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