Tektronix TekRanger 2 TFS3031, Service Manual

Page: 51 / 272

Specifications – TekRanger (serial nos. below B052000)
1–28
TFS3031 TekRanger/TekRanger 2 Service Manual
Table 1–25: Vertical System Dynamic Range (Standard 1310 nm Singlemode, Options 04 and 06)
Characteristic Performance Requirement Supplemental Information
Dynamic Range
Pulsewidth
2000 m
1000 m
500 m
100 m
50 m
20 m
10 m
5 m
1 m
SNR=1 Typical
26 dB 28 dB
23 dB
21 dB 24 dB
14.5 dB
13 dB
10 dB
8.5 dB
7 dB
2.5
Dynamic range SNR=1 is defined
as the difference between the
extrapolated backscatter level at
the start of the fiber and the RMS
noise level.
Measured using a 4Ćkm test fiber
(Corning SMFĆ28, 8.5 m m core,
0.12 NA) after 3 minutes of
averaging.
Based on high APD and amplifier
gains. Low APD gain reduces 4
dB. Low amplifier gain reduces 5
dB.
A 0.5ĆdB front panel loss is
assumed.
Temperature Coefficient of
Dynamic Range -0.15 dB/
o
C for T 25
o
C