Ocean Optics OOIBase32 - Manual (Page 114)

B: Toolbars
The table below details the options available in the Acquisition Parameters toolbar:
Option Description
Integ. Time
(msec)
Specifies the integration time (or A/D conversion frequency for an S1000 or
S2000BT) of the spectrometer, which is analogous to the shutter speed of a
camera. The higher the integration time, the longer the detector “looks” at the
incoming photons. If your Scope mode intensity is too low, increase this value. If the
intensity is too high, decrease the value.
Adjust the integration time so that the greatest amount of light that you anticipate for
your application causes a signal of about 3500 counts. While watching the graph
trace, adjust the integration time until the signal intensity level is approximately 3500
counts. The integration time specified controls enabled spectrometer channels in
the active spectral window.
Average
Specifies the number of discrete spectral acquisitions that the OOIDRV32 device
driver accumulates before OOIBase32 receives a spectrum. Signal-to-noise ratio
will improve by the square root of the number of scans averaged.
Boxcar
Sets the boxcar smoothing width, a technique that averages across spectral data.
This technique averages a group of adjacent detector elements. A value of 5, for
example, averages each data point with 5 points to its left and 5 points to its right.
The greater this value, the smoother the data and the higher the signal-to-noise
ratio. If the value entered is too high, a loss in spectral resolution will result. The S:N
will improve by the square root of the number of pixels averaged.
Flash Delay
(msec) Sets the delay, in milliseconds, between strobe signals sent out of the spectrometer.
This parameter only has an effect when using an ADC1000 A/D card.
Strobe/Lamp
Enable
Enables or disables the spectrometer strobe control function.
This function toggles the S0 line of the spectrometer.
Correct for
Electrical Dark
Enables or disables the correction of the spectral data for electrical dark signal.
The first 24 pixels in the spectrometer, while producing an electrical signal, do not
respond to light. This option subtracts the average value of these first 24 pixels from
the entire spectrum
Spectrum Controls
This toolbar contains shortcuts to options available from the Spectrum menu in OOIBase32.
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