ASD Document 600540 Rev. J 32 FieldSpec® 3 User Manual
www.asdi.com Chapter 4 Fiberoptic Interface
Step 7 Use the mouse to select the check box for the LED to turn on: VNIR, SWIR1,
or SWIR2. One or more may be selected at once.
Note: If a range is selected that the spectrometer does not have, that
particular LED will not be available to turn on. Nothing will be
harmed.
Step 8 Select the Check button which turns on the selected LEDs.
Step 9 Look through the magnifier to see which fibers light up.
• Count the number of fibers that show light. Refer to Details about the
Fiberoptic Cable and LEDs.
• If applicable, use the check boxes and the Check button shown in
Figure 4-2 to turn on and off different LEDs to help determine which
range might be affected.
Note: The RED LED for VNIR may be hard to see when the other
ranges are enabled.
Step 10 When finished, shutdown the Fiber Check application.
Details about the Fiberoptic Cable and LEDs
• The LEDs will only turn on for the ranges installed in the spectrometer.
Selecting one that the spectrometer does not have will not cause a
problem.
• Each range has a different LED color so that the fibers in the cable that
are associated with it can be seen: RED for VNIR; WHITE for SWIR1;
GREEN for SWIR2.
• The fiber bundle for each range contains 19 fibers.
• Each broken fiber results in a 5.26% loss of response in that particular
range (VNIR, SWIR1, or SWIR2).
Figure 4-3 Internal spectrometer LED shining to test Fiberoptic cable.
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