2-22
IM AQ1210-01EN
Cumulative Loss Type
You can select the cumulative loss measurement method from the following three types in the event
analysis settings.
S
▲
Measurement
reference point
▲
1
Event No. 1
Type 1 (without distance reference)
This method does not include the near-end
reflection in the cumulate loss value. The loss
from measurement start point S to the start
point of event No. 1 is measured.
Loss
Y2
▲
1
Event No. 1
Type 1 (with distance reference)
This method includes the near-end reflection in the
cumulate loss value. The distance reference is set to the
start point of the near-end reflection. The loss from distance
reference R to the start point of event No. 1 is measured.
Loss
Distance reference R
Distance reference R
Distance reference R
S
▲
Measurement
reference point
▲
1
Event No. 1
Type 2 (without distance reference)
This method does not include the near-end
reflection in the cumulate loss value. The loss
is measured using the same method as type
1 (without distance reference).
Loss
▲
1
Event No. 1
Type 2 (with distance reference)
This method does not include the near-end reflection in the
cumulate loss value. The distance reference is set to the
start point of the near-end reflection. The loss from
near-end reflection end point Y2 to the start point of event
No. 1 is measured.
Loss
S
▲
Measurement
reference point
▲
1
Event No. 1
Type 3 (without distance reference)
This method includes the near-end reflection
in the cumulate loss value. The loss is
measured from where the approximation line
between measurement start point S and
event No. 1 intersects distance 0 km to the
start point of event No. 1.
Loss
Distance 0 km
S
▲
Measurement
reference point
▲
1
Event No. 1
Type 3 (with distance reference)
This method includes the near-end reflection in the cumulate
loss value. The distance reference is set to the start point of
the near-end reflection. The loss is measured from the
intersection of the approximation line between distance
reference R and event No. 1 and the start point of event No. 1.
Loss
dB Decimal
You can select the number of decimal places of the dB display.
**.* : 1 decimal place
**.** : 2 decimal places
**.*** : 3 decimal places
Distance Decimal
You can select the number of decimal places of the distance display.
**.*** : 3 decimal places
**.**** : 4 decimal places
**.***** : 5 decimal places
2.3 Display (OTDR) Conditions