Appendix C
Measurement Methods and Limits
C-2
Attenuation
Measures the overall signal strength loss in the cable. Attenuation (worst pair-to-
pair) @ 20 degrees Celsius.
ANSI/EAI/TIA
Frequency
(MHz/dB)
Channel
1.00 3.20 4.20 2.10 2.50 2.10 2.20 1.88 2.15
4.00 6.10 7.30 4.00 4.50 4.00 4.50 3.53 4.02
8.00 8.80 10.20 5.70 6.30 5.70 6.30 - -
10.00 10.00 11.50 6.30 7.00 6.30 7.10 - -
16.00 13.20 14.90 8.20 9.20 8.20 9.10 7.06 8.04
20.00 9.20 10.30 9.20 10.20 7.93 9.03
25.00 10.30 11.40 10.30 11.40 8.89 10.12
31.25 11.50 12.80 11.50 12.90 9.94 11.33
62.50 16.70 18.50 16.70 18.60 14.34 16.38
100.00 21.60 24.00 21.60 24.00 18.56 21.26
200.00 27.21 31.47
Category 3
ANSI/TIA/EIA568/TSB67
Category 5
ANSI/TIA/EIA568/TSB67/95
ANSI/TIA/EIA568
Category 5e Category 6 (Draft 9)
ANSI/TIA/EIA568/TSB67/95
EINBETTENEINBETTENISO/AS/NZS
Frequency
(MHz/dB) Permanent Channel Permanent Channel Permanent Channel Permanent Channel
1.00 3.10 4.20 2.10 2.50 1.90 2.20 1.90 2.20
4.00 5.80 7.30 4.10 4.50 3.80 4.40 35.00 4.20
8.00 8.90 10.50 5.50 6.50 5.80 6.70 5.00 5.80
10.00 9.60 11.50 6.10 7.00 6.10 7.00 5.60 6.50
16.00 12.60 14.90 7.80 8.90 7.70 8.90 7.10 8.30
20.00 8.70 10.30 8.70 10.00 7.90 9.30
25.00 10.00 11.50 10.30 11.80 8.90 10.40
31.25 11.00 12.80 11.00 12.60 10.00 11.70
62.50 16.00 18.50 15.90 18.30 14.40 16.90
100.00 20.60 24.00 20.60 23.60 18.50 21.70
155.52 23.60 27.60
ISO Class-D
Proposed
ISO Class-EAS/NZS 3080ISO Class-C
ISO Class-D 11801
EINBETTENEINBETTEN
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