Appendix C
Measurement Methods and Limits
C-15
Accuracy Levels
The following tables list the Level I, II, and III accuracy levels defined by the
TIA/EIA 568-B and ISO Class-E specifications.
Level I Level II
1 - 100 MHz 1 - 100 MHz
Random Noise Floor 50 -15 log (f/200)dB 65 -15 log (f/200)dB
Residual NEXT 40 -15 log (f/200)dB 55 -15 log (f/200)dB
Output Signal Balance 27 -15 log (f/200)dB 37 -15 log (f/200)dB
Common Mode Rejection 27 -15 log (f/200)dB 37 -15 log (f/200)dB
Dynamic Accuracy ± 1.0 dB ± 0.75 dB
Length Accuracy ± 1 meter ± 4% ± 1 meter ± 4%
Return Loss 15 dB 15 dB
Directivity -- --
Delay -- --
Level III - Draft 3 Level III - New Proposal
1 - 250 MHz 1 - 250 MHz
Random Noise Floor 70 -15 log (f/200)dB 75 -15 log (f/100)dB
Residual NEXT 60 -15 log (f/200)dB 65 -20 log (f/100)dB
Output Signal Balance 35 -15 log (f/200)dB 40 -20 log (f/100)dB
Common Mode Rejection 35 -15 log (f/200)dB 40 -20 log (f/100)dB
Dynamic Accuracy ± 0.5 dB ± 0.75 dB (±1.0 dB ELFEXT)
Length Accuracy ± 1 meter ± 4% ± 1 meter ± 4%
Return Loss 15 -15 log (f/200)dB 25 -15 log (f/100)dB
Directivity 25 -15 log (f/200)dB 27 -7 log (f/100)dB
Delay 5 ns + 4% 5 ns + 4%
EINBETTEN
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