Specifications

Appendix B PTG Module 71
3. On the Setup menu select Pulsers to open
the Pulsers dialog box.
4. Select PTG. Then click on the Setup Pulser
button. The PTG dialog box (Figure 35)
will open. If PTG is grayed out on the
Pulsers dialog box, PTG support has not
been installed.
Figure 35. PTG dialog box
Figure 36. Pulsers dialog box
Triggers and Gating Setup
The remainder of the setup information is detailed in the PTG manual. Please refer to
that document when selecting trigger and gating modes and setting their respective
timing parameters.
Experiments
The kinds of experiments that can be performed with a PI-MAX detector and PTG are
shown in Figure 37. Of the many gated measurements that can be performed with a
PI-MAX and PTG, most will fall into one of the following categories:
• Static Gate: This type of experiment may also be referred to as “Repetitive-
Continuous”. There is a repetitive trigger, and the Gate Width and Gate Delay are
fixed. Some variable in the experiment such as pressure, concentration, wavelength
or temperature is varied.
• Swept Gate: In this type of experiment, Gate Width, Gate Delay, or both may be varied.
Repetitive-Sequential 1: The Trigger is repetitive, Gate Width is fixed, and Delay is
varied over the course of the measurement. The result of the experiment is a plot of
intensity vs. time, such as might be obtained with a sampling oscilloscope. This
technique is used to measure lifetime decays.