Ocean Optics adds low-jitter triggering functions to its USB2000 spectrometer
Triggering functions for the USB2000 spectrometer
Ocean Optics has added triggering functions to its USB2000 miniature spectrometer that are designed to provide accurate timing and synchronisation between the spectrometer and other devices.
Four low-jitter trigger modes and normal (free-running spectral acquisition) operating modes are now available, according to the company.
The USB2000 can be triggered so that sending the spectrometer a pulse causes it to do something such as a turn off or on a light, activate a pulse in a pulsed light source or start or end spectral acquisition in the spectrometer.
The miniature spectrometer incorporates an on-board programmable high-speed FPGA controller, a 22-pin connector and eight user-programmable digital I/Os.
- External software trigger — while the spectrometer is in free-running mode, data collected in the period up to the triggering event is transferred to software
- External hardware level trigger — the spectrometer waits for a sharp rise in voltage on the trigger input pin and then acquires spectra until the voltage is removed
- External synchronous trigger — the spectrometer acquires data from an external trigger event (such as a pushbutton) until the next time the trigger is activated, at which time the spectrometer ceases spectral acquisition and begins a new acquisition
- External hardware edge trigger — the spectrometer waits for a sharp rise in voltage on the trigger input pin and then acquires one spectrum; one spectrum will be acquired for each trigger unless an acquisition is already in progress
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