Princeton 4411-0139 ユーザーズマニュアル
186
PI-MAX
®
4 System Manual
Issue 4
13.3.3 Gating Mode
LightField supports three Gating modes for RF experiments:
•
Repetitive;
•
Sequential;
•
Custom.
The desired option is selected from the
Gating Mode
drop down list on the
SuperSYNCHRO Timing
panel. Each mode has its own set of configuration parameters
which are described in the following sections.
13.3.3.1 Repetitive
Perform the following procedure to configure Repetitive Gating Mode:
1.
The first requirement is that the PI-MAX4: 1024i-RF camera be aligned and focused on
the area of interest in the experiment. This is best accomplished while the camera is
operating in Full Frame readout mode. Verify that the
the area of interest in the experiment. This is best accomplished while the camera is
operating in Full Frame readout mode. Verify that the
Phosphor Decay Delay
is
appropriate to the phosphor used by your camera: the phosphor decay delay time
entered in LightField can be viewed or changed after clicking on the
entered in LightField can be viewed or changed after clicking on the
Advanced
button
on the
Common Acquisition Settings
expander. The procedure for initial focus is
described in
NOTE:
The
Phosphor Decay Delay
setting tells LightField how long to
wait after the gate pulse to shift the image. If there is some
residual image from the first frame in the second frame, simply
increase the
residual image from the first frame in the second frame, simply
increase the
Phosphor Decay Delay
setting to allow more time
for the phosphor emission to decay before shifting the image.
2.
After the alignment and focus, the PI-MAX: 1024i-RF system needs to be put into RF
modulation mode. On the
modulation mode. On the
Common Acquisitions Settings
expander, select
Use RF
Modulation
.
3.
On the
Trigger
expander, select Internal or External triggering.
•
For External triggering, make sure the trigger characteristics on the
Trigger
expander match the active trigger edge, etc. of the trigger pulse that will be used.
•
For Internal triggering, set the
Internal Trigger Frequency
on the
SuperSYNCHRO Timing
expander.
4.
Open the
SuperSYNCHRO Timing
expander (at the bottom of the window.) See
.