40 Chapter 4
Performing Measurements
2 Click on the Use Default Calibration Filename(s) checkbox, leaving
it
unchecked,
as
shown above.
The
Calibration Filename
field becomes
accessible.
3 Type in a new filename. Alternately, if other calibration files have been
saved, the user may select a previously-saved calibration file from the
pull-down list. The default calibration filename is obrCal_refl.
4 Click
OK
.
5 If you typed in a new
calibration filename,
next
select
Tools
> Calibrate.
Follow the instructions under “The Calibration Procedure” on page 37.
The new calibration will then take effect. It will be stored under the
filename entered in the Specify Calibration Filename(s) window
shown above.
—OR—
If you selected an existing calibration file, you must select Tools > Reload
Calibration Data. Or, if you wish to overwrite this existing filename with a
new calibration, simply perform a new calibration.
In either case, the OBR will not warn you if you are overwriting an existing
calibration file.
6 In order for the current calibration file to take effect when the OBR
software is restarted, select File > Save Software Options. Otherwise,
the default calibration file (obrCal_refl) will be loaded upon the next
startup.
I
m
port
a
n
t
Again: Renaming the calibration filename under Tools >
Specify Calibration Filenames does not change the
calibration file used by the OBR software. To do so, the
user must next perform a new calibration, or select Tools
> Reload Calibration Data.
Acquiring Data
The OBR has several options for data acquisition: Single Scan Mode and
Continuous Scan Mode. Both modes can be performed at user-controlled speeds
(see “Fast Scan Mode” on page 44) and in user-selected regions of the fiber under
test (see “Spot Scan Mode” on page 44 and “Extended Range Spot Scan Mode” on
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