Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию, Страница: 103 / 272

Specifications – TekRanger 2 (serial nos. B052000 and above)
1–80
TFS3031 TekRanger/TekRanger 2 Service Manual
Table 1–99: Horizontal System Dead Zone (Standard 1550 nm Singlemode, Option 06)
Characteristic Performance Requirement Supplemental Information
Attenuation Dead Zone
Pulsewidth
2000 m
1000
500 m
200 m
100 m
50 m
20 m
10 m
5 m
1 m
typical
2300 m
1350 m
600 m
175 m
100 m
46 m
36 m 23 m
18 m
15 m
Attenuation dead zone is defined
as the distance between the initial
and final points, where the
backscatter level is disrupted
beyond ±0.5 dB due to
encountering a single reflective
event.
Based on reflective event with no
greater than -40 dB reflectance.
Based on 9
µ
m, 0.1 NA SM fiber.
Event Dead Zone
Pulsewidth
2000 m
1000 m
500 m
200 m
100 m
50 m
20 m
10 m
5 m
1 m
typical
2250 m
1200 m
700 m
115 m
65 m
30 m
29 m 6 m
8 m
5 m
Event dead zone is defined as the
distance between the initial and
final points, where the reflected
pulse amplitude is -3.0 dB down
from its peak value.
Based upon reflective event with
no greater than -40 dB
reflectance.
OneĆmeter spec pased on testing
to justify that the end of a 5Ćmeter
jumper can be detected.
Controlled by system software and
not directly checked in the
performance verification
procedure.