Coaxial Cable Testing - DSX CableAnalyzer

Certifying coaxial cabling with Versiv requires the optional DSX-COAX coaxial adapters and either DSX-5000 or DSX-8000 copper modules.  The adapters are marked “DSX-CHA003 COAX ADAPTER.”

Possible Mesurement Parameters

Versiv units will test the coax cable to 1002MHz.

选择线缆类型

Cable types available in Versiv

Selecting a Test Limit

Click Here to see the Versiv Limit Lines document for a breakout of the Coax limits in section 2.1 (see Index on Page 1).

设置参考

至少每隔 30 天要设置一次参数。您不需要在每次拆除适配器后设置参考。但是,为了获得最佳精度,您应在每次使用同轴适配器时设置参考。
 
Connect the two Versiv units together as shown in the diagram below:  

The reference lead cannot be more than 20 inches (0.5m); otherwise the DSX will not permit the reference to be set.

虽然最好使用提供的 75Ω 参考线缆设置参考,但您也可以使用 50Ω 线缆设置参考。

自动测试结果

Below is an example of an autotest result for the TIA 568C.4 CATV RG6 : 

You will often see an “i” next to the test parameter. This indicates that the measurement is for Information only. 该测试参数未分配任何限值。大多数用户都知道他们的应用的最大值应该是多少。
 
HDTDR has a green check mark (pass) next to it. HDTDR 怎么会有限值呢?The DSX CableAnalyzer automatically looks for an impedance anomaly greater than 15%. If the impedance anomaly is greater than 15%, HDTDR will fail (red “x”).

阻抗异常

这是线缆上的线缆阻抗突变的位置。在同轴线缆测试期间,测试工具检测并报告线缆上最大阻抗异常(如果存在)的位置。
 
The test tool reports an anomaly if 15% or more of the test signal is reflected. 这里是有异常的 HDTDR 跟踪示例:

异常的原因有:

  • 连接不良
  • 线缆受压(线缆扎带紧、挤压、扭结等)
  • 线缆类型不匹配
  • Water in the cable jacket
  • 同轴线缆分路器中负载过大
  • 端接器值不正确 

Custom Coax Test?

除了更改线缆类型和 NVP 值之外,目前没有可以自定义同轴测试的选项。It is anticipated that this will provide enough flexibility to allow testing in the majority of coaxial installations.

Example Autotest Report:

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