ASD Document 600541 Rev. G 54 TerraSpec® User Manual
www.asdi.com Appendix B Reference Information
Also, broken fibers in the fiber optic cable can contribute to noise. Perform a
fiber optic check to verify.
An increase in noise can be due to a problem in the instrument such as an
electronic component malfunction or a grounding problem. This will many
times be indicated by a regular pattern to the noise or periodic bursts of noise
that are visible over the normal spectra.
B.1.14 Why does the VNIR drop to zero after a Dark Current
collection?
When the VNIR drops to zero after a Dark Current has been collected, this
may indicate a problem with the VNIR shutter or Dark Current collection
routine. To verify, optimize the instrument and listen for the click of the
shutter activating. If you do not hear the shutter click, contact technical
support and obtain an RMA for sending the instrument in for repairs.
B.1.15 How do I set up GPS?
The GPS feature is enabled in the RS
3
application software.
To configure the GPS:
Step 1 Select either:
• GPS->Settings... pull-down menu item.
• Alt+G, S key combination.
RS
3
requires the output of the GPS device to be in the National Marine
Electronics Association (NMEA) format. Check your GPS device
documentation for output and port settings.
Normally, the Baud rate (4800), Data bits (8), Parity (none), and Stop bits (1)
settings will remain the same as what is displayed in the window. The Write
to log file is checked by default. When this field is checked and the GPS
fixed data is enabled, an entry will be made to a daily log file (i.e.
050302gps.log) when a spectrum is saved.
Step 2In the GPS Settings dialog box, enter communication settings appropriate
for your instrument controller’s port intended for use as well as the GPS
device.
Note: The RS
3
settings on the instrument controller and the ports that are
used must match the actual port used as well as the settings of the
GPS device.
Step 3 Connect an appropriate cable between the instrument controller’s port and the
GPS device.
You may need a serial-USB converter depending upon the instrument
controller and GPS device.
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