Ocean Optics Jaz Install - Manual (Page 40)

4: Operating the JAZ-PX Module
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Setting JAZ-PX for Free Running Mode
In Free Running mode, the lamp simply flashes at a given rate and is not synchronized with any other
elements of the system. This mode is only suitable when the integration time is much longer than the flash
rate.
► Procedure
1. To place the JAZ-PX module into Free Running mode, set PX Lamp | Setup | Timing Controls |
Free Running to Enable.
2. Select the desired flash rate using PX Lamp | Setup | Parameters | Flash Rate. The default rate
is 200 Hz (5 msec).
3. Enable the strobe using PX Lamp | Enable Strobe.
Setting JAZ-PX for Triggered Mode
Some applications may require you to synchronize the various elements in the system to a system-wide
trigger signal. This mode would be comparable to the legacy “single strobe” mode in that the PX lamp
flashes can be synchronized to the spectrometer integration periods. However, the procedure below will
result in multiple synchronized flashes per integration period rather than just a single flash per integration
period.
► Procedure
1. Set the JAZ-PX module to turn Strobe Enable on using PX Lamp | Enable Strobe. The lamp
will not begin to strobe until after you have set the internal trigger.
2. Set the Jaz DPU’s stack trigger using System Tools | Triggering | Internal | Set Rate. This
selects the DPU’s internal timer as the source for the stack’s trigger and sets an appropriate flash
rate for the JAZ-PX lamp. The lamp will begin to flash at this rate when you click . The 10
msec setting is recommended as a starting point.
Caution
Unpredictable behavior may occur at rates above 200 Hz (5 msec) on battery power.
3. Select the spectrometer module in the Jaz stack to associate with the JAZ-PX module using
Spectrometer | Module x | Lamp Control | Choose Lamp | PX | Module x. (The selected
spectrometer’s module number will appear in parentheses next to the PX.) This lamp will be
disabled for dark measurements on the associated spectrometer module in the Jaz Spectroscopy
menu.
4. Set the selected spectrometer module to begin its integration period whenever it detects a stack
trigger (and is not currently in an integration period) using Spectroscopy | Module x | Tools |
Synchronization | Trigger | Mode | Hardware
.
4. Use the Jaz Spectroscopy menu to run your experiment.