Atec Fluke-OF-500 - 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
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