1. Descreption of OTRD lanch cable box.

OTDR Launch Cable, also name as Pulse Suppressor Cables, Launch Cords, Launch Leads, Receive Cables or Fiber Rings. It is used to measure the insertion loss of the near-end and/or far-end connection of a fiber optic link using an OTDR. When launch cables are used, faults close to the end of the fiber being measured can be seen by the OTDR. They do not interfere with the actual fiber being measured and thus are very secure and proven as a technique for identifying faults in the total length of fiber from the first interface to the last.

Optical time domain reflectometer (OTDR) is a necessary fiber optic testing tool which use light backscattering technologies to analyze the optical fiber performance. It can test the light loss and locate the breaks, splices and connectors in fiber optic network. However, OTDR has "dead zone" which can affect the testing result if proper measure is not taken. To overcome the limitation of OTDR dead zone, OTDR launch box is being used. This post will introduce OTDR launch box for your reference.

Basic of OTDR Launch Box
OTDR launch box, according to its function and working principle, has a lot of other names, like dead zone box, pulse suppressor, fiber ring, fiber optic launch cable, etc. How can OTDR launch box minimize the effect of OTDR dead zone during fiber optic testing? The following explains the detail.

The dead zone of OTDR, caused by high return level of reflection and affected by the pulse width, might extend hundred meters from the OTDR. Full length of optical fiber is suggested to use before the optical fiber under test. Thus, the receiver of the OTDR can have enough time to settle. OTDR launch box, which is actually a long spool of optical fiber inserted between the fiber under test and OTDR, can ensure that the OTDR dead zone happens in the OTDR launch box (shown in the following picture). Then, the fiber optic link under test won't be largely affected by the OTDR dead zone.

OTDR Launch Cable is designed to aid in the testing of fiber optic cable when using an OTDR to help minimize the effects of the OTDR's launch pulse on measurement uncertainty. Using a Etayson launch cable at the beginning of the fiber under test and a OLCB receive cable at the end of the fiber under test allows the ability to perform loss measurements on entire length of the fiber. The light weight unit measures only 6.25” in diameter and 1.25” high and includes a carabiner clip allowing the unit to be easily attached to belts, equipment straps and rack mounts. Units are available in lengths from 100 up to 2000 meters with a choice of a variety of connectors in order to connect to virtually all OTDR and patch panel ports. Optic fiber jump cable,OTDR Dead Zone Eliminator,Fiber Optic OTDR Launch cable box,fiber rings FC/SC/ST/LC(UPC/APC)

2. Features:

♦ Helps make a more precise measurement with an OTDR
♦ Defines insertion loss and reflectance of the near-end connection
♦ Inculdes a durable Metal Retractor making it easy to carry
♦ Built-in management saves space
♦ Will not dent, corrode or conduct electricity
♦ Light Weight

3. Applications:

Widely used with OTDR to help minimize measurement uncertainty indoor or outdoor.
Test the comprehensive performance of newly installed fiber links and detect problems in the existing fiber links.

4. Specification: