Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию

Страница: 91 / 272

Specifications – TekRanger 2 (serial nos. B052000 and above)
1–68
TFS3031 TekRanger/TekRanger 2 Service Manual
Table 1–79: Vertical System Dynamic Range (1300 nm Multimode, Option 03)
Characteristic Performance Requirement Supplemental Information
Dynamic Range
Pulse Width
100 m
50 m
20 m
10 m
5 m
1 m
typical
24 dB 29 dB
18 dB
19 dB
17 dB
15.5 dB
12 dB 15 dB
SNR=1. Dynamic range SNR=1 is
defined as the difference between
the extrapolated backscatter level
at the start of the fiber and the
RMS
1
noise floor.
Dynamic range 98% is defined as
the difference between the
extrapolated backscatter level at
the start of the fiber and the 98%
level of the noise.
(DR 98%) = (DR SNR=1) Ć 1.5 dB.
Measured using a 62.5
µ
m, 0.28
NA GI fiber after 3 minutes of
averaging.
A 0.5 dB front panel loss is
assumed.
Temperature Coefficient of
Dynamic Range -0.15 dB/
o
C for T 25
o
C, typical
1. RMS in this test is defined as the standard deviation.