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“Move downwards” indicates downward movement of measured trace.
“Longitudinal reset” indicates longitudinal reset of measured trace.
●
When measuring, except for the stop icon, functions of the other icons in
the icon tool bar for trace operation are forbidden.
7.1.3 Instruction of Info Window Area of the Main Interface of OTDR
Contents of info window include measurement parameter, event list, scale plate A/B, and
analyzed parameter, etc.
Measurement parameter includes laser wavelength, distance scope, pulse width,
refractivity, back scattering coefficient, reflection threshold, bundling threshold, non-reflection
threshold, and duration of measurement. The definition and setting are shown in “set” menu.
When looking over these parameters, click the icon “parameter” through the touch screen,
and then the parameter information can be found in the info window. Contents of parameters are
shown in Fig.7-4:
Fig.7-4 Info Window of Measured Parameter
Optical fiber link information includes file name, measurement date, measurement time, link
length, link loss, link attenuation coefficient, and quantity of event. Definition and setting of file
name, duration of measurement, and measurement date are shown in “set” menu. When
looking over information of optical fiber link, click the icon “fiber link” through the touch screen,
then the information of optical fiber link can be found in the info window. Contents of information
of optical fiber link are shown in Fig.7-5:
Fig.7-5 Info Window of Optical Fiber Link
Information of scale plate includes position of point A (or B), plug-in loss of point A (or B),
back scattering coefficient of point A (or B), accumulate loss of point A (or B), distance of A B
section, loss between two points of AB section, attenuation coefficient between two points of AB
section, and LSA attenuation coefficient of AB section. Sign post is used to mark and analyze a
single event, curve section and distance. The information of sign post shows distance, loss and
attenuation coefficient between sign posts. When changing any sign post, the record value will
also be changed along with it. When looking over information of scale plate, click the icon “AB
cursor” through the touch screen, then the information of scale plate can be found in the info
