3-20
IM AQ1200-01EN
3.9 Selecting the Calculation Method for Total
Loss and Total Return Loss
Procedure
1.
Using the
rotary knob
and
ENTER
, select
OTDR
.
2.
Press
SETUP
, the
System Setup
soft key, and then the
OTDR
soft key to display the following
screen.
Set the calculation method for total loss
(Cumulate loss, Loss between S and E).
Set the calculation method for total return loss
(Include END, Exclude END).
Explanation
Calculation Method for Total Loss
• Cumulate loss
The integrated value of the splice losses at each event from the measurement reference point (S)
is displayed. This is the conventional calculation method (firmware version 2.05 and earlier).
• Loss between S and E
The loss (TPA approximation method) between the measurement reference point (S) and the
end of fiber (E) is displayed.
Cumulate loss
Cumulate loss Loss between S and E
Splice loss of each event
Splice loss
between
two points
Measurement reference point (S)
Note
If Loss between S and E is selected, markers
1
and
2
are placed automatically at the measurement
reference point (S) and the END point (E) when event analysis is executed.
