Fiber Dead Zone Eliminator Otdr Launch Cable Sc-sc Singlemode 5000 Meter

US $395.00

Corona, California, United States
Jan 29th

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Fiber Dead Zone Eliminator OTDR Launch Box Cable SC-SC Singlemode 5000 Meter MSRP $1048.65 Dead Zone Eliminator® Fiber Optic Launch Box Series 5 Carry Case The Dead Zone Eliminator ® w/leads in carry case The Dead Zone Eliminator® is now available in a rugged, airtight, watertight, dustproof carry case measuring only 8.7"x7.5"x3.9". The light-weight case weighs less than 2 lbs. and can hold up to 5,000 meters of fiber. Features / Benefits Use as a Pulse Suppressor, OTDR Launch Box, Delay Line, Product Demonostrations, Training, Calibration Prevents fiber damage and stress during use or transportation Portable for field use Compound Latch for positive seal and easy opening with locking feature Non-metal construction will not dent, corrode, or conduct electricity Silicone O-ring seals out water and dust allowing the unit to be taken into almost any environment Case can house up to 5,000 meters of fiber Auto Purge Valve for changes in altitude and temperature Custom length configurations available Available with Singlemode 9/125, Multimode 62.5/125, Multimode 50/125 OM2 or Multimode 50/125 OM3 fiber Applications OTDR Launch Cable/Lead Equipment Calibration System emulation of loss, length, time delay and reflectance Description The Dead Zone Eliminator® (DZE) is designed to aid in the testing of fiber optic cable when using an OTDR. The unit is used with Optical Time Domain Reflectometers (OTDR's) to help minimize the effects of the OTDR's launch pulse on measurement uncertainty. Units are available in any length up to 5 km. Simply specify the fiber type, length and the connector style required for the input and output lead. FAQ Why do I need an OTDR Launch Cable/Box? » Typical setup » What is a "Dead Zone"? » Download Product Information Dead Zone Eliminator® Carry Case (File Size: 189 KB) http://www.fiberplus.com/Acrobat/Fiber%20Plus%20Intl%20Dead%20Zone%20Eliminator%20D5%20Series%20Launch%20Box.pdf Specifications Dead Zone Eliminator® with leads in Carry Case Dimensions Length 8.7", Width 7.5", Height 3.9" Lead Length 2 meters Material SR Polypropylene Weight 1.5 lbs. (w/out fiber) Operating Temp. -40° to +85° C Insertion Loss <0.3dB/km typical, <0.5dB/km max Dead Zone Eliminator® OTDR Launch Box / Delay Line / Pulse Suppressor Application Notes In use, the OTDR makes measurements on optical fibers by sending a very high intensity pulse of light into the fiber and looking for the minute reflections that occur along the length of the fiber as well as at all discontinuities at such places as splices and connections. This launch pulse typically can be varied in length to accommodate different lengths of fibers and measurement resolution. Generally speaking, the longer the fiber to be tested, the greater the amount of light that must be injected into the fiber. OTDR's cannot easily adjust the intensity of the launched pulse, so they try to arrive at the same result by keeping the pulse of light on for a longer period of time. As an example, a 100 nanosecond (100 nS=0.0000001 Seconds) pulse may be sufficient to get a good signal back and make measurements on a 100 Meter length of fiber but attempting to measure a 20,000 Meter length with the same pulse width may result in an insufficient signal reflecting back to the OTDR from the far lengths of the test fiber. Increasing the pulse width to 10 microseconds (10 uS=0.000010 Seconds) will allow more light to travel down the fiber and consequently more light to be reflected back. In effect, increasing the pulse width increases the signal to noise ratio and allows for an easier measurement. There is a significant trade-off between increased pulse width and measurement resolution. Calculating how long a section of fiber a 100 nS pulse of light occupies, one arrives at approximately 20 Meters. Basically, this tells us that by the time an OTDR shuts off a 100 nS light pulse, photons from the beginning of the light pulse are already 20 Meters down the length of the fiber. In effect, there is a 20 Meter bar of light traveling down the fiber. Compare this to a 10 uS pulse of light, the bar of light is 2000 Meters long! Some OTDR operators may not know that the length of this pulse or subsequent bar of light is important to the operational use of the OTDR. As the launch pulse leaves the OTDR, the reflection from the fiber optic connector on the OTDR front panel being generally greater than the back-reflection from the fiber itself, results in a saturation (overload) of the signal in the OTDR. This reflection effectively "blinds" the OTDR for the duration of the launch pulse. Since time equates to distance, we can say that the OTDR is effectively “blind” to the first 20 Meters of fiber if we are using a 100 nS launch pulse, and 2000 Meters if we are using a 10 uS launch pulse. In addition to the above mentioned saturation, some older OTDR's may not handle the intensity of the back-reflected signal from the beginning sections of the fiber under test and result in an increase in the blind time. In these older OTDR's, once the receiver saturates, it takes some finite amount of time for the receiver to start reacting normally – increasing the overall blind time some more. This blind time is generally referred to as the "dead zone". During the dead zone time, the OTDR cannot measure signal amplitudes and subsequently cannot properly measure fiber loss. In effect, we cannot measure the loss of the beginning length of the fiber under test during this period of saturation. Various OTDR manufacturers have developed novel ways of dynamically adjusting the gain of the OTDR receiver, less in the beginning when the signal is great, and more gain as the distance of the fiber increases. These techniques, although very beneficial for specific measurements, still does not allow us to measure the loss during the saturation or dead zone event. It is important to note that distance measurements are not affected by the saturation events as long as the user measures to the correct edge of the reflection. In addition to dead zones from the front panel OTDR reflection, reflections from subsequent connector to connector interfaces (patch panels) may result in their own dead zone events. Why not bury this unusable measurement time in a piece of fiber that is not part of the fiber under test? That is exactly what the DZE accomplishes. The DZE is available in various lengths and the perfect length is one that is slightly longer than the optical length of the launch pulse. In use however, it is not practical to have pulse suppressor lengths for each launch pulse setting on the OTDR - so most users opt to have a couple of different units on hand, each with a specific length. By placing the DZE in front of the fiber to be tested and shooting the OTDR through this device, the receiver can be in saturation while the light is still in the DZE and has not yet traveled into the fiber under test. In this manner, the receiver returns to service while the launch pulse is still traveling in the DZE. We are then able to make attenuation measurements starting at a point and before the beginning of the fiber under test – but still not right at a point inches from the start of the fiber under test. Why? Because, don't forget, you somehow have to connect the pulse suppressor to the fiber under test and this interface will cause a reflection that may result in another dead zone. Remember - we cannot make loss measurements within these reflections. So how does the Dead Zone Eliminator (DZE) allow us to measure through this dead zone event? Easily, by allowing us to place a measurement cursor in the linear (non-saturated) portion of the trace prior to the start of the fiber under test, and within the length of the DZE. In this manner, we measure through the dead zone events giving an indication of the loss of this section. When measuring loss of fiber through these events it is important to realize that the OTDR is measuring not only the fiber under test, but also a small length of the DZE and the DZE to fiber connector pair. This method gives us a good indication of the quality of the initial section of the fiber under test, a loss indication that may not be available to us without the use of the DZE.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Fiber Plus International
MPN	2121802
Model	D5353-S5000