Fluke OF-500-01 OptiFiber, Technical Reference Handbook, Page: 239 / 278

Maintenance and Specifications
Specifications
12-15
12
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
12-1.
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). Figure
12-1.
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: Attenuation deadzone. EDZ is valid only for
Fresnel (non-saturating) reflections.
-continued-
ajt73f.eps
Figure 12-1. Event and Attenuation Deadzone
Measurement Methods
5