1-10
IM AQ1200-01EN
Multi Trace Analysis
You can load up to four traces that have been measured on the AQ1200x/AQ1205x and display them
simultaneously for comparison.
You can adjust the vertical display position of each loaded trace.
2 Way Trace Analysis
Trace events that have been measured from optical fiber cable end A to end B and those measured
from end B to end A can be combined. This combination enables displaying of events that could not
otherwise be measured because of dead zones.
In the figure below, the event that is in the near-end dead zone (point S) when measured from end A
is detected as event number 5 when measured from end B. In the 2 way trace analysis display, it is
displayed as event number 1.
AQ1200x
AQ1205x
End A
End B
End A → End B
End A ← End B
▲
▲
▲
▲
▲
▲
S
1
2
3
4
E
▲
▲
▲
▲
▲
▲
S
1
2
3
4
E
5
▲
▲
▲
▲
▲
▲
S
1
2
3
4
E
5
2 way trace analysis
AQ1200x
AQ1205x
An event of the other trace that exists within 6% of the position of an event of the current trace will be
considered part of the current trace event.
If multiple events of the other trace that exists within 6% of the position of an event of the current trace,
the closest event will be considered part of the current trace event.
Traces that meet the following conditions can be combined.
• Both have the same wavelength.
• Both have the same pulse width.
• Their end position offset is within 6%.
• Both have event lists.
Differential Trace
You can load two traces that have been measured on the AQ1200x/AQ1205x and display their
difference as a trace.
The screen can display the loaded traces and the differential trace simultaneously.
The differential trace is the result of subtracting the values of the current trace from those of the other
trace.
You can use markers to read the following values of the differential trace.
• Loss between markers (dB)
• Distance between markers (km)
• Loss per unit distance between markers (dB/km)
• Distance to each marker
Section Analysis
You can set two markers, start point S and end point E, to measure the return loss and total loss in
the section that you have specified. If you specify the reference point marker
B
for the return loss
measurement, you can measure the return loss in the area between
B
and E.
S
E
E
E
E
B
1.4 Waveform and Event Analysis
