Difference between revisions of "NVP for generic cable types"

From wiki.comcert.com
Jump to navigation Jump to search
(Created page with " == Introduction == A correct configuration of NVP assures the most accurate calculation of the electrical length of the link under test.    == Solution == These...")
 
 
(12 intermediate revisions by the same user not shown)
Line 2: Line 2:
 
== Introduction ==
 
== Introduction ==
  
−
A correct configuration of NVP assures the most accurate calculation of the electrical length of the link under test. 
+
Correct configuration of NVP ensures the most accurate determination of cable length during testing. 
  
 
 
 
 
Line 8: Line 8:
 
== Solution ==
 
== Solution ==
  
−
These are the values for NVP for the most common types of twisted-pair cable. 
+
These are the average values for NVP (%) for some generic types of twisted-pair cable.  
  
−
Use these values whenever the manufacturer of the cable is unknown, or the link is composed of diferent brands of cable.
+
Standards stipulate that NVP must be specified at 10MHz signal at 20°C (68°F).
 +
 
 +
(Source: [https://www.flukenetworks.com Fluke Networks])
 +
 
 +
{| align="center" border="2" cellpadding="1" cellspacing="1" style="width: 500px;"
 +
|-
 +
! scope="col" | Category
 +
! scope="col" | U/UTP
 +
! scope="col" | U/FTP
 +
! scope="col" | F/UTP
 +
! scope="col" | S/FTP
 +
|-
 +
| 5e
 +
| 69
 +
| -
 +
| 69
 +
| -
 +
|-
 +
| 6
 +
| 69
 +
| 74
 +
| 70
 +
| -
 +
|-
 +
| 6A
 +
| 68.2
 +
| 74
 +
| 74
 +
| 77
 +
|-
 +
| 7
 +
| -
 +
| -
 +
| -
 +
| 78
 +
|-
 +
| 7A
 +
| -
 +
| -
 +
| -
 +
| 78
 +
|-
 +
| 8
 +
| -
 +
| -
 +
| -
 +
|
 +
72
 +
 
 +
|}
 +
 
 +
 

Latest revision as of 15:17, 7 April 2024

Introduction

Correct configuration of NVP ensures the most accurate determination of cable length during testing. 

 

Solution

These are the average values for NVP (%) for some generic types of twisted-pair cable.  

Standards stipulate that NVP must be specified at 10MHz signal at 20°C (68°F).

(Source: Fluke Networks)

Category U/UTP U/FTP F/UTP S/FTP
5e 69 - 69 -
6 69 74 70 -
6A 68.2 74 74 77
7 - - - 78
7A - - - 78
8 - - -

72

 

Retrieved from "https://wiki.comcert.com/index.php?title=NVP_for_generic_cable_types&oldid=8643"