View original release here: This number, added to the margin shown in the "RL dB " line, gives you the cable's tested return loss value at the frequency in the "Freq. Under normal circumstances, cable test management tasks are quite demanding, but if you resort to the right software utility in order to carry them out, the entire process should seem much more approachable. The "Worst Case Value" table, to the right, is always blank on patch cord tests. In the "positive" case, as on our tester, the number of dB is the signal relative to the RL; in the "negative" case it is the RL relative to the signal; but in either case a larger absolute value more positive if positive, more negative if negative than the spec limit is desired. Because there are reflections at these points, the cable tends to "ring" at the frequency which corresponds to the cable's physical wavelength, and this means that there will be return loss spikes not only at that frequency, but at all of the harmonic multiples thereof. 
| Uploader: | Kajisida |
| Date Added: | 20 July 2004 |
| File Size: | 28.92 Mb |
| Operating Systems: | Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X |
| Downloads: | 37735 |
| Price: | Free* [*Free Regsitration Required] |
To make matters slightly more confusing, some people frame these RL figures in negative dB terms, meaning exactly the same thing as they would mean in positive dB terms--if you encounter specifications which require a negative value for RL, bear this in mind.
LinkWare PC is one such piece of software whose purpose is to help you collect cable data from multiple testers, then process and turn it into comprehensive reports using all the tools it linkward for seamless control. What Does This Report Mean?
Fluke Dtx-1800 Linkware.
Importing data from cabling tester should raise no difficulty either, with serial port fluk being set automatically during the process. Because there are reflections at these points, the cable tends to "ring" at the frequency which corresponds to the cable's physical wavelength, and this means that there will be return loss spikes not only at that frequency, but at all of the harmonic multiples thereof.
Data integrity should not be affected in any way, so you are able to securely combine and store test results into existing or new ,inkware you can subsequently interact with in a transparent manner.
This results in what can seem like a "backward" result: In this case, the worst result was 3. On an ending note, LinkWare PC is a highly capable piece of software designed to make responsibilities related to cabling installation management less pressing, giving you direct dtx-8100 to data delivered by multiple testers so that you can subsequently process and effortlessly share it with customers.
DTX CableAnalyzer Series
In the case of a Cat 6 or 6a patch cord exceeding 20m, we test against the 20m standard as we do not have programmed "limit sets" for longer cables.
Return loss is the loss caused by signals in the cable reflecting as a result of changes in the impedance of the line. Blue Jeans Cable Home Page. Any possibility of giving a "pass" to a cable which actually fails, however, is eliminated by the fact that Fluke builds into these limit sets a margin of error parameter and will alert the test operator and show on the test report if a test is within the tester's statistical margin of error and therefore not an iron-clad certain pass.
View original release here: In the case of Cat6a patch cords, the tester supports only the ISO specs.
Click to load comments. This frequently though not alwaysas here, will be the 36 and 45 pairs, as the 36 pair has to be split due to its being terminated into linkwsre pins, and lies right over or under the 45 pair in the connector, making these two pairs more prone to crosstalk with one another.
The test results also include the total length of each of the four pairs of the cable.
The main and remote units obtained similar results, with the worst frequency being The specification limits for crosstalk vary with length, becoming more relaxed for longer cables. This number, added to the margin shown in the "RL dB " line, gives you the cable's tested return loss value at the frequency in the "Freq.
With the Fluke CableAnalyzer, LinkWare can create professional flukee test results that can be sent to the client via e-mail. This table identifies the worst pair in the cable for return loss performance, and shows that pair's worst passing margin against the specification's return loss limits.
It should always equal or exceed the actual length of your cable, and represents the next-longer length of cable for which the Fluke tester has a programmed set of limits. This tester identifies the point of failure, including distance from the tester and potential reasons for the fault.
Fluke Linkware Download
To explain how this test report is generated, and what the meaning of the values and graphs shown on it is, we first need to touch upon the specifications just a bit.
This table identifies the worst near-end crosstalk NEXT result in the cable. There can be a variety of reasons for this, but the principal one is that the largest "event" as the signal travels through the cable is the impedance bump, and accompanying reorientation of the dtx-1800 causing increased crosstalk it experiences at the connectors at the each end.
Such limits, and measurements, are exactly the same but with the opposite sign. Here, as in the table to the left, is an estimate of the length of the cable based upon the time it took signals to travel through it. Here again, just as with crosstalk, the number may seem backward: The easy to understand wire map function will make repairing shorts, swapped pairs and reversals a breeze for less experienced techs.
One thing you may well wonder, when looking at these, is why they are so lumpy. linjware
The "Worst Case Value" table, to the right, is always blank on patch cord tests. Length Flyke Here, as in the table to the left, is an estimate of the length of the cable based upon the time it took signals to travel through it.
The Fluke tester supports two sets of specifications for Cat 5e and 6 patch cords:
Comments
Post a Comment