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 Q1: For best results, OTDR dead zones should be minimized: True or False? A1: True Q2: What are the two factors that contribute to an OTDR dead zone? A2: Pulse width and OTDR-related dead zones Q3: Is adjusting pulse width necessary? Why? A3: Yes; longer traces may require wider pulses Q4: What are the two types of OTDR-related dead zones? A4: Event and attenuation dead zones Q5: Which OTDR-related dead zone determines how far apart events must be to measure events individually? A5: Attenuation SECTION 2: OTDR LAUNCH CABLES Q1: What are some common names for OTDR launch cables? A1: Fiber rings, dead zone boxes, pulse suppressors Q2: How long must a launch cable be for a pulse width of 20 meters and an attenuation dead zone of 5 meters? A2: At least 50 meters Q3: Why are launch cables necessary? A3: Allow OTDR photodiode recovery; measurement of near-end connection SECTION 3: DURABILITY AND COST ISSUES Q1: OTDR launch cables are optional: true or false? A1: False Q2: Why is it important to properly maintain OTDR launch cables? A2: Cost Q3: Why are OTDR launch cables expensive? A3: Extreme length, compounded by necessity of multiple connector combinations SECTION 4: ECONOMY VS. UTILITY Q1: What is the advantage of using mating sleeves to adapt OTDR launch cables? A1: Reduce cost by purchasing only one launch cable Q2: What is the disadvantage? A2: Additional reflection caused by mating sleeve prohibits measurement of near-end connection SECTION 5: OTDR LAUNCH CABLE CONFIGURATIONS Q1: What is the preferred launch cable configuration? A1: Fiber ring Q2: What is a dead-zone box? A2: Long fiber spool with mating sleeves on both ends

All prices on this website are shown in US Dollars (USD)

Optical Wavelength Laboratories, Inc. dba Omni Wavelength Laboratories

OWL manufactures a complete line of fiber optic test equipment for a wide range of applications, including telco, WAN, MAN, LAN, SAN, CATV, IT, manufacturing, and laboratory. OWL's complete line of fiber optic testers have capabilities ranging from simple optical power and optical loss measurement to complete standards-based fiber optic link certification for both multimode and singlemode fibers, including 10-Gigabit Ethernet! Product lines include: optical time domain reflectometers (OTDR), optical power meters, light sources, talk sets, optical length testers, visual fault locators and serial plastic fiber transceivers. All OWL optical power meters and light sources are NIST traceable. For more information or for assistance in choosing the right fiber optic test equipment for your needs, send us an information request and we would be happy to assist you.