2-3
IM AQ1210-01EN
Setting Up the OTDR Feature
11
22
33
44
55
66
77
88
99
10
10
11
11
App
App
Index
Index
Explanation
Wavelength
You can enter the following wavelengths.
Model
Optical Pulse Wavelength
AQ1210A
1310 nm, 1550 nm, 1310 nm/1550 nm (multi wavelength measurement)
AQ1215A
1310 nm, 1550 nm, 1310 nm/1550 nm (multi wavelength measurement)
AQ1210E
1310 nm, 1550 nm, 1625 nm, 1310 nm/1550 nm (multi wavelength measurement)
AQ1210D
1310 nm, 1550 nm, 850 nm, 1300 nm, 1310/1550 nm (multi wavelength measurement),
850/1300 nm (multi wavelength measurement)
AQ1215E
1310 nm, 1550 nm, 1625 nm, 1310 nm/1550 nm (multi wavelength measurement)
AQ1215F
1310 nm, 1550 nm, 1650 nm, 1310 nm/1550 nm (multi wavelength measurement)
AQ1216F
1310 nm, 1550 nm, 1650 nm, 1310 nm/1550 nm (multi wavelength measurement)
1310 nm/1550 nm, 850/1300 nm (multi wavelength measurement)
In a single measurement, 1310 nm and 1550 nm or 850 nm and 1300 nm are measured one at a
time. If 1310 nm/1550 nm or 850 nm/1300 nm is selected, the wavelength of optical pulse being
measured is displayed on the screen.
Distance Range
Set the distance range according to the length of the optical fiber cable. The distance range that you
can select varies depending on the wavelength. Specify a distance range value that is greater than
the length of the optical fiber cable that you will measure. If you specify a shorter value, the instrument
will not be able to perform measurements properly. The longer the distance that you specify, the more
time measurements will take. When you specify the distance range, the optimum pulse width and
attenuation values are set automatically.
Cable Length
Distance Range
Cable Length
Distance Range
Unknown
Auto
16 km to 24 km
30 km
0 m to 160 m
200 m
24 km to 40 km
50 km
160 m to 400 m
500 m
40 km to 80 km
100 km
400 m to 800 m
1 km
80 km to 160 km
200 km
800 m to 1.6 km
2 km
160 km to 240 km
256 km, 300 km
1.6 km to 4 km
5 km
240 km to 320 km
400 km
4 km to 8 km
10 km
320 km to 400 km
512 km
8 km to 16 km
20 km
Pulse Width
The pulse width has the following characteristics.
• A short pulse width enables you to measure with a high resolution, but you cannot measure long
distances.
• A long pulse width enables you to measure long distances, but you cannot measure with a high
resolution. Also, dead zones are larger with long pulse widths.
The pulse widths that you can select vary depending on the distance range, as shown in the
following table.
Distance Range Selectable Pulse Widths
200 m
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns
500 m
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns
1 km
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
2 km
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
5 km
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
10 km
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
20 km
3 ns/5 ns
1
10 ns 20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
2
µ
s
30 km
10 ns
20 ns 30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
2
µ
s
50 km, 100 km
20 ns
30 ns 50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
2
µ
s
5
µ
s
10
µ
s 20
µ
s
200 km
30 ns
50 ns 100 ns 200 ns 300 ns 500 ns 1
µ
s
2
µ
s
5
µ
s
10
µ
s 20
µ
s
300 km
50 ns
100 ns 200 ns 300 ns 500 ns 1
µ
s
2
µ
s
5
µ
s
10
µ
s 20
µ
s
1 The pulse width is 5 ns on the AQ1210A/AQ1210E/AQ1210D (1310/1550 nm) and 3 ns on the AQ1215A/
AQ1215E/AQ1215F/AQ1216F/AQ1210D (850/1300 nm).
2.1 Measurement (Measure) Conditions
