DTX2CU exercises

Introduction

The best way to learn to is do.

These test results are real results taken from the field.

• Open the file Exercises01to16LinkWare.flw in LinkWare
• Double click one of the result records; another windows will open with detailed test data
• Select Pair Data near the top and HDTDR or HDTDX Analyzer near the bottom of the window

 

Solution

Exercise 01 - cable length

Notice that the length has exceeded 90m but not failed.

Accept? No.

Why? Insertion Loss failed. Even when the length limit can be exceeded by 10%, cables lengthes exceeding the design length are likely to fail the insertion loss test.

HDTDR/HDTDX: You could look at HDTDR to make sure there is nothing unusual.

Corrective Action: try and remove some slack from the cable run. 

 

Exercise 02 - cable length

With ISO/IEC11801, length is not a required field test parameter.

Notice that Length is marked with an "i".

Accept? No.

Why? Insertion Loss failed. Even when there is no field test limit for length like in ISO/IEC11801, cables lengthes exceeding the design length are likely to fail the insertion loss test.

HDTDR/HDTDX: You could look at HDTDR to make sure there is nothing unusual.

Corrective Action: try and remove some slack from the cable run.