Why does the graph show results at 275 MHz?

In LinkWare Stats, you will see a graph similar to that below: 

LinkWare Worst Frequency Result  at 275 MHz

What may seem strange at first, are the results from 250 MHz to 275 MHz. How can this be given the limit line stops at 250 MHz?
The lesser side of the bar is inclusive, so this bar would be

250.0 <= x < 275.0

In other words, these are records at 250 MHz exactly, no other frequency. If it wasn't done that way, a negative margin bar from -1 to 0 would include a 0.0 data point; which would be annoying. 

What is LinkWare Stats?

A full version of LinkWare Stats is included in LinkWare PC..

Testing todays advanced cabling plants is so complex that a single Category 5e test report includes more than 400 data fields. With typical jobs including hundreds to thousands of links, even if you sift through all the results and see that they all pass, critical questions remain.
  • How can you easily tell if an incorrect test specification was used?
  • Which adapter was used?
  • Were all testers using correct software?
  • Did you get the margins you expected?
  • Were they consistent?

Fluke Networks has the answer with LinkWare Stats, a results analysis software option that integrates with our LinkWare Cable Test Management Software. LinkWare Stats generates statistics on the cabling links within your LinkWare database then transforms the performance results into summary graphics that give you the analytical information you need, fast.
Whether youre a network owner, cabling contractor or manufacturer, now for the first time, you can quickly see the true performance of the entire cabling plant and spot any anomalies or inconsistencies.
An example of a LinkWare Stats report is available by clicking here (PDF 201 KB) 
LinkWare has the flexibility to let you breakdown the results to floor level, as defined in ANSI/TIA/EIA-606-A. An example of a project broken down to building level is available by clicking here (4.6 MB) You will need Microsoft Internet Explorer 5.0 or higher to view the report.
LinkWare Stats works hand in hand with LinkWare cable test results management software. LinkWare gives you the power to manage results data from multiple testers with one single software application. LinkWare Stats gives you the statistical analysis and reporting power to move above and beyond page-per-link reports. It analyzes and transforms LinkWare cable test data into graphics that reveal your cabling plant performance summarizing your entire cabling infrastructure in a compact, graphical format that makes it easy to verify margins and spot anomalies.

  • Get a complete view of cabling plant performance in ways you havent seen before
  • Filter incoming data to highlight exactly what youre looking for
  • View graphs and tables that show margins by test standard, operator, location and other attributes
  • Eliminate the chance that an anomaly gets overlooked; graphs highlight marginal or failed links in color
  • Quickly and easily demonstrate that the installation meets warranty requirements
  • Win more business with professional and customized performance summary reports

LinkWare Stats gives you an instant overview of your installed cabling plants performance, with plenty of detail if you want it. Were you promised 3 dB of headroom above the limit line? In a simple picture, LinkWare Stats tells you if its there. 

NEXT Margin Graph

Were all the tools used on the job running the correct test? 

LinkWare Pass or Fail Summary Report

You can see at a glance. Want to know the margins for you Optical Fiber Test Results? Its all there for every measurement, floor, building, and test type. 

Optical Loss Margin Graph

LinkWare Stats makes it easy for cabling contractors to demonstrate a level of professionalism and attention to quality that sets them apart in a competitive industry. It provides a customizable cover sheet and graphical summary of the entire installation job to demonstrate the quality of your work to your customer. Ever worked on a large job, only to discover after a week of testing that someone was using the wrong test standard or adapter? With LinkWare Stats, a quick review of the first days results immediately lets you know if youre on track as expected.
Ever wonder which components really perform better after being installed? Its obvious with LinkWare Stats. Want to be sure that the manufacturer will issue warranty coverage quickly? LinkWare Stats presents test results the way manufacturers prefer to see them.
LinkWare Stats makes warranty review of installed results a breeze and provides useful data for future designs. At a glance, you can see which pairs had the worst results and at what frequencies they occurred.

NEXT Worst Pair in Main  NEXT Worst Pair in Remote

LinkWare Stats also allows analysis over a large population of installed products, so you can review performance by contractor. Whos doing the best terminations? If the average NEXT margins are 5 dB, why is one cluster of results only 2 dB? Are your near and far-end results consistent? 

LinkWare Operator Summary Report

Tired of thumbing through binders of printed test results? Analyze 500 links in minutes with LinkWare Stats. Preview the results before compiling a report. 

LinkWare Stats Default Setup

Start with the default setup, add a cover page with your company logo, select the report page types, and preview a sample. One setup is all it takes to save the configuration so you can produce it again easily. 

Cover Sheet Information Window


Learn About:
- Fiber Testing

Some of my test results seem to be missing - LinkWare Stats

Worst Case and Worst Case Margin
PentaScanner reports individual tests with the worst values. These are not comparable to worst margin test results from other testers, so they are not included in Stats calculations.
OMNIScanners can be set to operate in either worst value or worst margin mode. If results were taken in worst value mode, overall margin values are recorded, but not for main and remote individually, nor for worst pair or frequency. So these results would not be included in LinkWare Stats calculations. 
3 dB and 4 dB Rules
Cat 5 and higher, and Class D and higher test standards say that when the attenuation is below 3 dB, the Return Loss is not evaluated against a limit. Also, when the attenuation is below 4 dB, NEXT is not evaluated. In either case, if the attenuation never goes above the amount described, no individual test result is calculated. With OMNIScanner, a margin is still calculated. On DSPs, no valid margin is calculated. In either case, these results do not figure into LinkWare Stats calculations for Return Loss or NEXT. 
Fiber Results Without Limits
Some cable testers do not calculate a margin against a test limit when testing fiber. These results would not be figured into margin calculations in Stats.