Ocean Optics External Triggering Options - Manual

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External Triggering Options Instructions
Overview
Ocean Optics USB2000, USB2000+, USB4000, HR2000, HR2000+, HR4000, Jaz, Maya, QE65000, NIR
Series, NIRQuest Series, S2000, and S1024DW Spectrometers provide several methods of acquiring data
(see table below). In the Normal mode, the spectrometer is “free running.” That is, the spectrometer is
continuously scanning, acquiring, and transferring data to your computer, according to parameters set in
the software. In this mode, however, there is no way to synchronize the scanning, acquisition, and transfer
of data with an external event. However, trigger pulses for synchronizing an external event with the
spectrometer are available.
To synchronize data acquisition with external events, other modes of acquiring data are available. Each
mode involves connecting an external triggering device to the spectrometer and then applying an external
trigger to the spectrometer before the software receives the data. The length of the integration time and
the source for the integration clock depend upon the mode chosen. All other acquisition parameters are set
in the software.
For spectrometers with FPGA firmware versions of 3.0 or higher, and for spectrometers not covered by
this document, see
New External Triggering Options Instructions for Spectrometers with Firmware
Version 3.0 and Above . Also see the HR4000 and USB4000 Shutter Mode Performance in Hardware
Trigger Mode for more information on external triggering with these spectrometers.
Triggering Mode Description Applicable Spectrometer(s)
Normal Spectrometer acquires spectra continuously. All
External
Software Integration time is set in the software. Software
receives a trigger event and transmits spectra obtained
in the data acquisition cycle in which the trigger
occurred. All
External
Hardware Integration time set via chip in spectrometer (USB
Series/Jaz/HR Series/S2000 D Series) or jumpers
(S2000 series). Spectrometer waits for a sharp rise in
voltage on the trigger input pin, and then acquires
spectra until the voltage is removed. USB2000/USB4000/Jaz/
HR2000/HR2000+/HR4000/
S2000/S1024DW
External
Synchronization Spectrometer acquires data from an external trigger
event (such as a push button) until the next time the
trigger is activated, at which time the spectrometer
ceases spectral acquisition and begins a new
acquisition. Integration time cannot be set, since the
trigger can fire at random intervals.
S2000/S1024DW