Difference between revisions of "NVP for generic cable types"
From COMCERT Wiki
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== Solution == | == Solution == | ||
| − | These are the values for NVP for some common types of twisted-pair cable. | + | These are the values for NVP (%) for some common types of twisted-pair cable. |
Standards stipulate that NVP must be specified for at 10MHz signal at 20°C (68°F). | Standards stipulate that NVP must be specified for at 10MHz signal at 20°C (68°F). | ||
| + | |||
| + | (Source: [https://www.flukenetworks.com Fluke Networks]) | ||
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| − | | | + | | 69 |
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| 6 | | 6 | ||
| − | | | + | | 69 |
| − | | | + | | 74 |
| − | | | + | | 70 |
| − | | | + | | - |
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| 6A | | 6A | ||
| − | | | + | | 68.2 |
| − | | | + | | 74 |
| − | | | + | | 74 |
| − | | | + | | 77 |
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| 7 | | 7 | ||
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| − | | | + | | 78 |
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| 7A | | 7A | ||
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Revision as of 15:09, 7 April 2024
Introduction
Correct configuration of NVP ensures the most accurate determination of cable length during testing.
Solution
These are the values for NVP (%) for some common types of twisted-pair cable.
Standards stipulate that NVP must be specified for 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 |
