Princeton Instruments PI-MAX4, Manual

Page: 163 / 326

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
-013
9_010
2
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 • P S ± 2 P S)
',QLWLDO*DWH'HOD\•,QVHUWLRQ'HOD\
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
4411
-013
9_018
1