Main Tester as Remote

You can use the Versiv mainframe tester (display unit) as a remote for twisted pair and coax cable tests and also for fiber loss/length tests when using the CertiFiber Pro modules.  When you do loss/length tests with mainframe testers at both ends, you can use FiberInspector video probes with both testers for faster inspections of fiber endfaces.

To use a Versiv mainframe tester as remote:

Tap TOOLS then tap Main as Remote

 

.

 

Tap STOP to exit Main as Remote mode.

 

The main unit acting as the Remote will show the status of the test as well as the result of the test (Pass or Fail).

 

Fiber Inspection

When you do loss/length tests with the main testers at both ends of the link, you can use the FiberInspector video probes with both testers for faster fiber end face inspection and certifications.

 

 

Reports in LinkWare PC and in LinkWare Live will list a mainframe unit in Remote Mode as a Remote Unit, since it was that mode at the time the test was run.

TERA® - DSX-8000 CableAnalyzer

To test TERA® Solutions from Siemon, you can use the DSX-8000 CableAnalyzer, which has been approved by Siemon.
 
TERA® is Siemon's Category 7 connector used in Class F, Class FA and Class II cabling systems.  It is a non-8P8C (RJ-45 style), shielded connector.  Since it is not 8P8C (RJ45 style) based, you cannot use your DSX-PLA804 Permanent Link Adapters.  Likewise, you cannot use your DSX-CHA804 Channel Adapters.

To test Siemon TERA® correctly with a DSX-8000, you need to order the DSX-8-TERA-KIT for your DSX-8000 CableAnalyzer. 

Do NOT order just the DSX-PLA-8-TERA-S, TERA Permanent Link Adapters!  You also need at least one DSX-CHA-8-TERA, TERA® Channel Adapter so you can Set Reference with the main and remote units.  (Shown below)  Ordering the DSX-8-TERA-KIT is the best option when you initially need to start testing on a TERA® project.


 

Class II is rated to 2,000 MHz (2 GHz).  You will need a Level 2G tester such as the DSX-8000 to test this class of installation.

Class FA is rated to 1,000 MHz (1 GHz).  You need a Level V tester such as the DSX-5000 or DSX-8000 CableAnalyzer to test this class of installation.

Class F is rated to 600MHZ.  You need a Level IV or better tester to test this class of installation.

If you purchase the kit (recommended), part number DSX-8-TERA-KIT, it will come with (2) DSX-PLA-8-TERA adapters and (2) DSX-CHA-8-TERA adapters

 

DSX-8-TERA-KIT for DSX-8000

Patch Cord Certification with DSX-PCxxS Adapters

This is required reading material for anyone who is certifying patch cords to ANSI/TIA and ISO/IEC standards:

DSX-PCxx Patch Cord Adapters Users Manual

There are three DSX Patch Cord Adapter sets available:

DSX-PC5ES – Two DSX-PC5E Cat 5e Patch Cord adapters (for certifying Cat 5e Patch Cords to TIA Cat 5e Patch Cord Limits)

DSX-PC6S   -- Two DSX-PC6S Patch Cord Adapters (for certifying Cat 6 Patch Cords to TIA Cat 6 Patch Cord Limits)

DSX-PC6AS – Two DSX-PC6A  Patch Cord Adapters (for certifying Cat 6A Patch Cords to TIA Cat 6A Patch Cord Limits)

The DSX patch cord adapters are tuned specifically to the capabilities/ratings of the jacks and cables used on the patch cords.  In other words, you should not expect to be able to use the DSX-PC6AS or the DSX-PC6S to be able to successfully certify Cat 5e Patch Cords.  If that is your requirement, you should buy DSX-PC5ES.

The Appendix of the Users Manual details a process for How to Characterize the Adapters.  We recommend you perform this process, and also the steps for How to Verify the Adapters’ Performance.  This ensures that the adapters are working properly, the replaceable jacks are installed correctly, and that the adapters are not damaged.

Read through the section How to Set Up the Tester and configure your test set. 

Make sure to set Store Plot Data:  ON

The most common questions we receive in TAC about patch cord certification are as follows:

Why is NEXT failing?

  • Is it the cable or the connector?

Why is Return Loss failing?

  • Is it the cable or the connector?



If you need additional help determining the cause of failure, open a support case with Technical Support.  We would need to see the LinkWare (.flw) file to interpret the results.


 

Versiv 2 Power Button LED Charge Indication

If you have a Versiv 2 unit, you may have noticed that the charge LED next to the AC port is no longer present as they were in Versiv (V1) units.

 

 

On Versiv 2 units the LED in the power button shows the status of the battery charging process.

 

 

Power Button’s LED Indications for Versiv 2 Testers:

 

 

You can also check the battery status on the display of the main tester or on the remote.  For more information, review Chapter 1 of the Versiv Series Technical Reference Handbook.

 

How to Prevent Damage to the Permanent Link Adapter Cables

This article applies to DSX-PLA004 and DSX-PLA804 Permanent Link Adapters.

To Prevent Damage to the permanent link adapter cables and make sure your test results are as accurate as possible, do not twist, pull on, pinch, crush, or make kinks in the cables.

  • When you put the adapters in the equipment bag, do not coil them tighter than a diameter of 5 inches.
  • When removing the plug from the panel, hold the metal housing to disconnect; do not pull on the cable to dislodge the plug from the jack at the panel.

 

Implementing Belden 2183 limits on the Fluke Networks Versiv DSX-5000 and DSX-8000

Belden’s 4K UHD Media Cables, 2183P and 2183R, are specifically designed to deliver 4K content over HDBaseT up to 100 m, support HDBaseT 5Play and carry the UL 4299 Power Over HDBaseT (PoH) certification, all in a small, flexible design.

There are specific field testing limits for these cables designed by Belden and Fluke Networks. There are three limits that are available, Channel and Permanent Link that we are familiar with, and a third test limit named Direct Attach. The Direct Attach limit can be used when the installed link does not have any jacks and is just a plug to plug link, essentially a long patch cord. It is important to use this limit if you are working with field installed RJ-45 plugs.

In order to test the Direct Attach links, Belden recommends the use of their AX104552 couplers and attaching these directly to the end of the DSX-PLA004 permanent link adapters.

 

Permanent Link Adapter => AX104552 coupler => Rev Connect Plug

 

Regular Direct Attach links are tested with Patch Cord Adapters.

This document describes step-by-step instructions for selecting these test limits in the Fluke Versiv Tester.

You can configure Belden 2183 limits from Linkware Live, or from the tester. Instructions for setting up a project through Linkware Live are located here.

 

 

  1.  Select Project
  2.  New Project
  3.  Name your Project
  4.  Select Test Set Up or NEW TEST
  5.  Select Cable Type
  6.  More
  7.  Manufacturers
  8.  Belden


 

  1.  Select your cable type, Riser or Plenum
  2.  Test Limit
  3.  More (this page shows the Last Used limits
  4.  Vendor
  5.  Selct your limit, Channel or Permanent Link or Direct Attach
  6.  SAVE
  7.  Back or HOME key
  8.  Push TEST to start

 

Results Management on Versiv

Did you know that you can review how Versiv was set up when you are looking at your saved results on Versiv?  To do this, tap the Results icon on the home screen, then tap the result in question to see the detail in the Performance tab.  The top line is the Test Limit that was chosen prior to testing.  Tap the > (right arrow) and Versiv will display more information about the setup, including

  • Cable Type
  • Test configuration details
  • Versiv Main and Remote module serial numbers and calibration information
  • Adapters used (Permanent Link or Channel)
  • Software Version

       

       

 

It is recommended that you make a point of SYNCing Versiv to LinkWare Live anytime you create new test configurations in LinkWare Live, and on an ongoing basis during testing, at least once in the morning and once at the end of the day to transfer the results to your LinkWare Live organization.

New with Version 5.4 Build 1, you will notice a difference in the Results screen when you tap VIEW ALL.  The Project folder now shows the tested status and export status.  

 

DSX Set Reference Failed due to ground path between testers

This article applies to both DSX-5000 and DSX-8000 copper modules.

If you encounter this message while you are setting reference over the copper adapters (DSX-PLAx04) link adapter and (DSX-CHAx04) channel adapter), it usually means that the USB cable is still connecting the Versiv main and Versiv remote when you attempt to set the reference.  Disconnect any other connections between the Versiv main and Versiv remote other than the link adapter into the channel adapter and try setting the reference again.

 

NEXT (Near-End Crosstalk) Troubleshooting with DSX CableAnalyzer

Are you looking to troubleshoot NEXT Problems? Why not try:

Case Study 1 – Marginal NEXT Pass on a DSX CableAnalyzer

Case Study 2 – NEXT Fails on DSX CableAnalyzer due to Cable

Case Study 5 – NEXT Fails on DSX CableAnalyzer due to a termination issue

 

When a current flows through a wire, an electormangetic field is created which can interfere with signals on adjacent wires. As frequency increases, this effect becomes stronger. Each pair is twisted because this allows opposing fields in the wire pair to cancel each other. The tighter the twist, the more effective the cancellation and the higher the data rate supported by the cable. Maintaining this twist ratio is the single most important factor for a successful installation.

If wires are not tightly twisted, the results is Near End Crosstalk (NEXT). Most of us have experienced a telephone call where we could hear another conversation faintly in the background. This is crosstalk. In fact the name crosstalk derives from the telephone application where ‘talk’ came ‘across’. In LANs, NEXT occurs when a strong signal on one pair of wires is picked up by an adjacent pair of wires. NEXT is the proportion of the transmitted signal that is electromagnetically coupled back into the received signal.

 

 

Results Interpretation

Since NEXT is a measure of the difference in signal strength between a disturbing pair and a disturbed pair, a larger number (less crosstalk) is more desirable that a smaller number (more crosstalk). Because NEXT varies significantly with frequency, it is important to measure it across a range of frequencies, from 1 to 100 MHz for Category 5E and up to 500 MHz for Category 6A. If you look at the NEXT on a 50 meter segment of twisted pair cabling, it has a characteristic “roller coaster going uphill” shape. That is, it varies up and down significantly, while generally increasing in magnitude. This is because twisted pair coupling becomes less effective for higher frequencies.

 

 

The field tester should compare successive readings across the frequency range against a typical pass/fail line, such as the Category 6A specification we see here. If the measured value of the NEXT crosses the pass/fail line at any point, then the link does not meet the stated requirement. Since NEXT characteristics are unique to each end of the link, NEXT is measured in both directions.

 

Troubleshooting Recommendations

In many cases, excessive crosstalk is due to poorly twisted terminationsat the connection points.

From the standard, ANSI/TIA-568-C.0

It is essential to maintain the design performance of connecting hardware when terminated to a balanced twisted-pair cable, and this shall be achieved by terminating the appropriate connecting hardware for that balanced twisted-pair cable in accordance with the connecting hardware manufacturer’s instructions. Where no connecting hardware manufacturer’s instructions exist, then the cable geometry shall be maintained as close as possible to the connecting hardware, and its cable termination points and the maximum pair un-twist for the balanced twisted-pair cable termination shall be in accordance with table 1. 

Table 1 states 13 mm (0.5 in) for Category 5e, 6 and 6A. An additional note common to all standards is that the amount of untwist should be kept to a minimum. Experience has shown that 13mm does not guarantee a PASS when field testing. 

 

The first thing to do in the event of a NEXT failure is to use the field tester to determine at which end the NEXT failure occurred. Once this is known, check the connections at that end and replace or re-terminate as appropriate. The DSX has two powerful troubleshooting features to help identify the cause of a NEXT failure. The first is named Fault Info, more details on that here. Many testers have a time domain feature, the ability to look down the cable and see where the crosstalk is happening. The example below is taken from a DSX CableAnalyzer. The feature is called HDTDX.

 

 

If this does not appear to be the problem, check for the presence of lower Category patch cords (such as voice grade cable in a Class D installation). Another possible cause of NEXT failures are split pairs. These can be identified automatically with the wiremap function of your field tester. Female couplers are another high source of crosstalk and should not be used in a data installation. If a cable is not long enough, replace it with a cable of the required length rather than adding another cable.
 
Sometimes a NEXT failure is caused by an inappropriate test being selected. For example, you cannot expect a Category 5e installation to meet Category 6A performance requirements.
 
The best method for troubleshooting NEXT is to use a tester with Time Domain capabilities. This gives the tester the ability to show the fault by distance, pinpointing the problem. This diagnostic function clearly identifies the cause of the NEXT failure, whether it's the patch cord, connection, or horizontal cable. 

In the event you have eliminated all of the above NEXT sources and are still experiencing NEXT failures, contact the system designer for further assistance.

Case Study 5 – NEXT Fails on DSX Cable Analyzer due to a termination issue

See a video example of this case here.

In this case study, the installer was failing NEXT when certifying a number of category 6A permanent links. With the DSX CableAnalyzer, it is possible to discover why these links were failing.

After the TEST, the installer was presented with the following DSX CableAnalyzer test result. The DSX will show the same results screen as left from the previous test. In this case, the WIRE MAP screen. Select FAULT INFO to quickly identify the cause of the failure.

 

 

Let's take a look at how the DSX CableAnalyzer diagnosed a problem with the local connector.

 

Step 1

Find out which pair combination of NEXT is causing the FAIL.

  • Tap "Performance"
  • Tap "NEXT"
  • Tap the Right Arrow of PAIR to identify the worst pair combination

 

 

In this example, we see that the 1,2 - 3,6 pair is the cause of the NEXT failing.  Make a note of the failing pair.

 

Step 2

Look at the HDTDX Analyzer trace for this marginally performing pair. X for the NEXT failure.

  • Tap the back arrow in the top left corner 
     
  • Tap the FAULT INFO tab 
     
  • Tap the HDTDX ANALYZER button 
  • Tap the Right Arrow next to the PAIR to select just the 1,2 - 3,6 pair





Step 3

Analyze the trace. What you are seeing is where the crosstalk is happening in the link. The cursor automatically goes to the largest source of crosstalk. In this case, the largest source of crosstalk occurred in the first connector, at 0.0 meters. The two yellow dotted lines represent the ends of the test leads of the DSX CableAnalyzer, so you can assume the lines are the location of your first and last connection.

You will note there is a “Value 53.05” on the screen as well. This is the value of the peak at the place of the cursor. In an ideal world, the value should not exceed 35 units, 30 if the link is less than 15 meters in length. Clearly, that has been exceeded. Looks like the near end connection needs to be reterminated (assuming the connector is really a Category 6A connector). Before we do that, let’s take a look at the far end of the link for the same pair, 1,2 – 3,6 on this link by moving the cursor to the near end finding the largest value, in this case “Value: 9.77” at a distance of 13.6 meters. 


 

This is a good connection, much less than our limit of 35. This is what you would expect to see on a mated connection. Choose your connector carefully, terminate is carefully, making sure to minimize the untwisting of the pairs and the jacket removal and you can expect to see these small values.

If you have the “Store Plot Data enabled in your DSX CableAnalyzer, these graphs will be available to analyze in LinkWare PC software.

Conclusion:

The termination at the near end of the link is supect. Be careful though. The HDTDX is telling us that the NEXT FAIL is due to the connection at the near end of the link. It could be any of the following reasons:

  1. Bad termination (twists not maintained)
  2. Non component compliant Category 6A connector
  3. Catefory 5E or Category 6 connector used in a Category 6A link
  4. Bad Connector

The order above indicates the most likely cause, with 1 being the most likely.