1-9
IM AQ1200-01EN
Features
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
App
Index
20
4 Point Markers
The AQ1200x/AQ1205x uses the following four points to perform the measurement: the
measurement start point
1
, the splice loss start point
2
, the splice loss end point Y2, and the
measurement end point
3
. At position
2
, the level difference between the approximated line
2
–
1
and the approximated line Y2–
3
is calculated as the splice loss. The splice loss changes greatly
depending on the position of
2
. Set the correct position for
2
. The splice loss value changes
depending on the approximation method that you have specified. This can only be used when
Marker Mode is set to Marker.
Y2
b(dB)
e (dB)
c (km)
f (km)
Approximated line Y2–
3
2
1
3
5 Point Markers
The AQ1200x/AQ1205x uses the following five points to perform the measurement: the near-end
point (n), a point (N) that is used to calculate the near-end side’s approximated line, a point (E)
where splice loss is detected, a point (F) that is used to calculate the far-end side’s approximated
line, and the far-end point (f). At position E, the level difference between the approximated line n–
N and the approximated line F–f is calculated as the splice loss. The splice loss changes greatly
depending on the position of E. Set the correct position for E. The splice loss value changes
depending on the approximation method that you have specified. This can only be used when
Marker Mode is set to Line.
n
N
f
F
a (dB)
b (dB)
c (km)
e (dB)
f (km)
E
Approximated
line F–f
Approximated
line n–N
Return Loss
Return loss RL is the ratio, in dB, of the reflected optical power level Pr to the incident optical power
level Pi. It is calculated using the following equation. The larger the return loss, the smaller the
reflected optical power. This implies that the performance of the measured optical line is good.
RL = –10log(Pr/Pi) [dB]
1.4 Waveform and Event Analysis
