Video #: C1007 Duration: 14:35 File Size: 246.9 MB File Type: MP4
Description: Explains the concept of OTDR dead zones, the effect of dead zones on OTDR measurements, and the use of OTDR launch cables to counter the effects of dead zones.





Pause the video after each objective to answer the review questions below.

SECTION 1: OTDR DEAD ZONES DEFINED
A1: True
A2: Pulse width and OTDR-related dead zones
A3: Yes; longer traces may require wider pulses
A4: Event and attenuation dead zones
A5: Attenuation


SECTION 2: OTDR LAUNCH CABLES
A1: Fiber rings, dead zone boxes, pulse suppressors
A2: At least 50 meters
A3: Allow OTDR photodiode recovery; measurement of near-end connection


SECTION 3: DURABILITY AND COST ISSUES
A1: False
A2: Cost
A3: Extreme length, compounded by necessity of multiple connector combinations


SECTION 4: ECONOMY VS. UTILITY
A1: Reduce cost by purchasing only one launch cable
A2: Additional reflection caused by mating sleeve prohibits measurement of near-end connection


SECTION 5: OTDR LAUNCH CABLE CONFIGURATIONS
A1: Fiber ring
A2: Long fiber spool with mating sleeves on both ends