Tektronix TekRanger 2 TFS3031, Service Manual

Page: 68 / 272

Specifications – TekRanger (serial nos. below B052000)
TFS3031 TekRanger/TekRanger 2 Service Manual
1–45
Table 1–49: Vertical System Measurements (Extended Range 1550 nm Singlemode, Option 08)
Characteristic Performance Requirement Supplemental Information
Linearity 3Ćminute average.
±0.02 dB/dB typical
From 9 dB above RMS floor to 1.5
dB below maximum signal level.
Measurement Accuracy
TwoĆPoint
Splice Loss
LSA Fiber Loss
Reflectance
3Ćminute average, ±0.1 dB/dB for
events 10 dB above the 98% noise
floor, 95% confidence.
± 4 dB maximum error below -40
dB. 10 m to 1 m pulsewidth.
Reflections may clip above ć40 dB.
Table 1–50: Measurement Range (Extended Range 1550 nm Singlemode, Option 08)
Characteristic Performance Requirement Supplemental Information
Loss Threshold (dB) Max PW
0.05 500 m
0.2 2000 m
0.5 2000 m
1.0 2000 m
Measurement Range (dB)
Minimum Typical
13 15
20 22
22 24
23 25
IntelliTrace mode averaging and
analysis less than 3 minutes.
For isolated nonreflective event or
grouped NRĆreflective events.
Reflective event return loss >-40
dB; distance >1 km past NR event.
(This means that a small,
nonreflective event followed closely
by a small, reflective event will
reduce the repeatability of finding
these two events).
Table 1–51: Single-Event Distance Measurement Repeatability
1
(Extended Range 1550 nm Singlemode, Option 08)
Characteristic Performance Requirement
Supplemental
Information
Range from Front
Panel (dB)
0 to 1
1 to (DR
4
ć8)
(DRć8) to DR
Reflective
2
2.5 m
20 m
40 m
Nonreflective
3
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.