C-1
Appendix C
Patch Cord Performance Requirements
The tables in this appendix show TIA/EIA and ISO/IEC performance requirements at
selected frequencies for Cat 5e and Cat 6 patch cords. These numbers are used in the
DTX test specification database.
Notes
Patch cord performance requirements may change as standards are
amended. If requirements change, Fluke Networks will post an updated
test specification database for the DTX tester on the Fluke Networks DTX
software download page. To install a new database, use the Modify DTX
Test Limits utility in LinkWare.
The DTX-PCU6 patch cords adapters are optimized for testing Cat 6 patch
cords, but may be used with a Cat 6 limit to test Cat 5e patch cords. To
optimize the adapters for testing Cat 5e patch cords, replace the RJ45 jacks
in the adapters with Cat 5e jacks specially selected for testing patch cords.
See "Replacement Parts" on page 9 for a source for these jacks. See
"Replacing the Adapter's Jacks" on page 8 for installation instructions.
Table C-1. Cat 5e Patch Cord Limits per TIA/EIA-568-B
Patch Cord Length and NEXT (dB)
Freq.
(MHz)
0.5m 1m 1.5m 2m 2.5m 3m 3.5m 4m 5m 7.5m 10m 15m 20m
RL
(dB)
1
65 65 65
65.0
65.0
65 65 65
65 65 65 65 65 19.8
4
65 65 65 65.0 65.0 65 65 65 64.4 63.3 62.4 61.2 60.3 21.6
8
62.3 61.6 61.1 60.6 60.2 59.8 59.4 59.1
58.6 57.5 56.7 55.5 54.7 22.5
10
60.3 59.7 59.2 58.7 58.3 57.9 57.5 57.2 56.7 55.6 54.8 53.7 53 22.8
16
56.3 55.7 55.1 54.7 54.3 53.9 53.6 53.3 52.7 51.7 51 49.9 49.3 23.4
20
54.4 53.8 53.2 52.8 52.4 52 51.7 51.4
50.9 49.9 49.1 48.2 47.6 23.7
25
52.5 51.9 51.3 50.9 50.5 50.1 49.8 49.5 49 48 47.4 46.4 45.9 24.0
31.25 50.6 50 49.4 49.0 48.6 48.2 47.9 47.7
47.2 46.2 45.6 44.7 44.2 23.1
62.5
44.7 44.1 43.6 43.2 42.8 42.5 42.2 41.9
41.5 40.7 40.2 39.5 39.2 20.0
100
40.7 40.1 39.7 39.3 38.9 38.6 38.4 38.1
37.8 37.1 36.6 36.1 35.9 18.0
125
38.8 38.3 37.8 37.4 37.1 36.8 36.6 36.4 36 35.4 35 34.6 34.4 17.0
200
34.9 34.4 34 33.6 33.3 33.1 32.9 32.7
32.4 31.9 31.7 31.4 31.4 15.0
250
33 32.5 32.2 31.8 31.6 31.4 31.2 31 30.7 30.3 30.1 30 30 14.0
