EXFO FTB-7000 OTDR for FTB-200 v2 User Manual
Page 181
Analyzing the Results Manually
OTDR
167
Getting Event Loss (Four-Point and Least-Square Approximation)
Getting Event Loss (Four-Point and
Least-Square Approximation)
Event loss (expressed in dB) is calculated by measuring the signal level
reduction in Rayleigh backscatter (RBS) caused by this event. Event loss
can result from both reflective and non-reflective events.
Two loss calculations are provided simultaneously: the four-point event
loss and the A-B LSA loss. Both calculations use the least-square
approximation (LSA) method to determine the event loss. However, the
four-point event loss is the preferred method and the one that corresponds
to the loss displayed in the events table.
See also other documents in the category EXFO Measuring instruments:
- ADSL2+ (124 pages)
- ADSL2+ (267 pages)
- ADSL2+ (275 pages)
- ARU-100 HPNA Test Probe (26 pages)
- ARU-100 HPNA Test Software Option for DSL/IP Tests (3 pages)
- AXS-100 Series OTDR (155 pages)
- AXS-200 SharpTESTER (70 pages)
- AXS-200/610 Copper Test Module (152 pages)
- AXS-200/650 IP Triple-Play Test Set (91 pages)
- AXS-200/850 Ethernet Test Set (262 pages)
- CableSHARK P3 VF/DSL Cable Qualifier (321 pages)
- DC0091A (3 pages)
- ELS-500 Light Source (45 pages)
- EOT Series (2 pages)
- EPM-ELS-50 (206 pages)
- ETS-1000 (173 pages)
- ETS-1000G (195 pages)
- ETS-1000L (47 pages)
- EXpert IP Test Tools (62 pages)
- EXpert IPTV Test Tools (FTB-1 / 2 Pro) (82 pages)
- EXpert IPTV Test Tools (FTB-200v2) (82 pages)
- EXpert VoIP Test Tools (107 pages)
- FIP-400 Fiber Inspection Probe and ConnectorMax (78 pages)
- FIP-400B Fiber Inspection Probe Multifiber (2 pages)
- FIP-400B Fiber Inspection Probe and ConnectorMax2 (111 pages)
- FIP-425B/435B Fiber Inspection Probe and ConnectorMax2 Mobile (103 pages)
- FLS-110 Optical Polarized Source (18 pages)
- FLS-300 Light Source (40 pages)
- FLS-5800 CD/PMD Analyzer Source (106 pages)
- FLS-5800 CD/PMD Analyzer Source (98 pages)
- FLS-5800 (6 pages)
- FLS-600 Light Source (79 pages)
- FOA Compatibility (3 pages)
- FOT-5200 Coarse Spectrum Analyzer (47 pages)
- FOT-930 Multifunction Loss Tester (111 pages)
- FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) (537 pages)
- FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 (659 pages)
- FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 (251 pages)
- FTB -5240S/5240BP Optical Spectrum Analyzer (638 pages)
- FTB-1 (234 pages)
- FTB-2 Pro (6 pages)
- FTB-2 Pro (443 pages)
- FTB-200 v2 Compact Modular Platform (222 pages)
- FTB-2200 for FTB-200 v2 (41 pages)
- FTB-3930 MultiTest (101 pages)