Figure 52. Experiment Setup| Timing Tab - Princeton Instruments PhotonMAX System Manual

62
Notes:
1. The timing diagram represents the exposure-readout sequence. Time resolution
between subframes is given by t
2. A reduced number of rows in the right image illustrate a way to achieve better time
resolution between subframes.
Triggered Operation
The PhotonMAX supports three different readout
modes for kinetics mode data acquisition: free run,
single trigger, and multiple trigger. Free run mode is
used for experiments that do not require any
synchronization with the experiments. The other two
modes (single trigger and multiple trigger) require that
an external TTL pulse be applied to the camera via the
Trigger In connector on the I/O cable. The camera can
be triggered either on +ve or -ve edge of the incoming
TTL pulse.
Note: The I/O cable supplied with the PhotonMAX
provides access to primary signals such as "Trigger
In," "Trigger Invert," "Expose Out," "Frame
Readout," and "Shutter Out." In the default mode, the
camera triggers on the rising edge of a TTL signal. To
change the trigger action to the falling edge, you must
pull the Trigger Invert connector low by grounding it
via a 50Ω terminator.
In single trigger mode, the camera requires only one
trigger to initiate an entire series of "exposure-shift"
cycles as shown in the timing diagram below. Here,
the camera uses the exposure time as entered into the software.
Trigger In
Exposure/
Subframe
Vertical Shift
Readout
PhotonMAX System Manual
#1 #2
ß t à ß t
exp exp
#1
t
ß à
s
Figure 53. Example showing Kinetics Operation using "Single Trigger"
+ t .
exp s
#n
à ß t à
exp
#2
t
ß à
s
Version 1.B
Select the Trigger
Mode: Single or
Multiple.
Select Safe Mode.
Figure 52. Experiment Setup|
Timing tab page
#n
t
ß à
s
~500 msec 1 MHz readout
@