Atec Fluke-OF-500 User Manual
Page 117
Specifications
107
OTDR Specifications for OFTM-573x Singlemode Modules (cont.)
Event deadzones
1
1310/1550 nm: 1 m typical
Attenuation deadzones
2
1310/1550 nm: 8 m typical
Maximum measurement range
3, 4
1310 nm: 60 km
1550 nm: 60 km
1.
For singlemode: measured at 1.5 dB below the reflection peak for a
typical singlemode UPC connector (< -50 dB reflection using 5 ns pulse
width). Refer to Figure 38.
2.
For singlemode: measured at
±
0.5 dB beyond the backscatter for a
typical singlemode UPC connector (< -50 dB reflection using 20 ns
pulse width). Refer to Figure 38.
3.
For typical fiber with backscatter coefficients of -77 dB at 1310 nm and
-82 dB at 1550 nm.
4.
Distance ranges for loss in a typical fiber. Greater than 3 dB above the
noise floor at 60 km.
5.
EDZ: Event deadzone. ADZ: Attentuation deadzone. EDZ is valid only
for Fresnel (non-saturating) reflections.
ajt73f.eps
Figure 38. Event and Attenuation Deadzone
Measurement Methods
5
-continued-