Tektronix TekRanger 2 TFS3031, Service Manual

Page: 69 / 272

Specifications – TekRanger (serial nos. below B052000)
1–46
TFS3031 TekRanger/TekRanger 2 Service Manual
Table 1–52: Vertical System Dynamic Range (Extended Range 1550 nm Singlemode, Option 08)
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
28 dB 30 dB
26 dB
24 dB 26 dB
18 dB
16.5 dB
13 dB
11.5 dB
10 dB
5.5 dB
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.
Based on high APD and amplifier
gains. Low APD gain reduces 4
dB. Low amplifier gain reduces 5
dB.
Measured using a 4 km test fiber
(Corning SMFĆ28, 8.5 m m core,
0.12 NA) 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