6-6
IM AQ1200-01EN
Explanation
2 Point Markers
The AQ1200 measures the distance and the loss between two points. If reflection is detected between
the two points, the return loss is also measured.
Splice loss (total loss)
20 km (example)
20 dB (example)
(n in Line mode.)
(E in Line mode.)
Splice loss:
Return loss:
–
–
20
20
1
dB
km
dB/km
Splice loss
The measured loss value differs depending on the specified approximation method. For details on the
approximation methods, see section 3.6.
4 Point Markers
This mode is only enabled when the Marker Mode is set to Marker. The AQ1200 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 the position of marker
2
, the level
difference between the approximated line
1
–
2
and the approximated line Y2–
3
is calculated as the
splice loss.
Y2
b
a
e
c
f
Approximated line Y2–3
Splice loss:
Return loss:
b
c
b/c
dB
km
dB/km
a dB
e
f
e/f
dB
km
dB/km
–
–
6.1 How to Operate the Cursor and Markers
