Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию

Страница: 113 / 272

Specifications – TekRanger 2 (serial nos. B052000 and above)
1–90
TFS3031 TekRanger/TekRanger 2 Service Manual
Table 1–113: Vertical System Measurements (1625 nm Singlemode, Option 12)
Characteristic Performance Requirement Supplemental Information
Linearity Manual acquisitions: Typically
±0.02 dB/dB from 15 dB to 2 dB
below backscatter at front panel;
±0.05 dB/dB typical from 10 dB to
1 dB below backscatter at front
panel
3Ćminute average.
Measurement Accuracy
TwoĆPoint
Splice Loss
LSA Fiber Loss
±0.1 dB/dB typical 3Ćminute average
For events 10 dB above the 98%
noise floor, 95% confidence.
Reflectance NonĆclipped reflection.
± 4 dB typical
Meets or exceeds Bellcore
GRĆ196ĆCORE
Table 1–114: Single-Event Distance Measurement Repeatability
1
(1625 nm Singlemode, Option 12)
Characteristic Performance Requirement
Supplemental
Information
Range from Front
Panel (dB)
0 to 1.5
1.5 to (DR
4
ć8)
(DRć8) to DR
Reflective
2
typical:
2.5 m
20 m
40 m
Nonreflective
3
typical:
2.5 m
20 m
160 m
IntelliTrace mode
1
Multiply by 0.001% of range for timebase error. These data are for a 0.5 dB event with 95% probability on a single unit.
2
Reflectance greater than -45 dB, 0.5 dB loss.
3
Reflectance less than -60 dB, 0.5 dB loss.
4
DR is the dynamic range for 2000Ćm pulse width from table 1-52. DR is the 98% dynamic range, defined as dynamic range SNR=1 minus 1.5.