139
APPENDIX A: Test Standards
Table A-2. NEXT
Frequency
MHz
Category 3 (dB)
Category 4 (dB)
Category 5 (dB)
Channel
Link
Channel
Link
Channel
Link
1
39.1
40.1
53.3
54.7
>60
>60
4
29.3
30.7
43.3
45.1
50.6
51.8
8
24.3
25.9
38.2
40.2
45.6
47.1
10
22.7
24.3
36.6
38.6
44
45.5
16
19.3
21
33.1
35.3
40.6
42.3
20
31.4
33.7
39
40.7
25
37.4
39.1
31.25
35.7
37.6
62.5
30.6
32.7
100
27.1
29.3
Table A-3. CAT3, CAT4, and CAT5 Pass/Fail Limits
Length
Channel:
≤
100 meters, Link:
≤
94 meters
Characteristic Impedance
100±25
Ω
Split Pair
NEXT<20 dB (8 to 10 MHz)
Resistance
<9.9
Ω
A.5 ISO/IEC—Test Limits
Cabling System performance criteria have been established internationally
by the ISO/IEC Standards body in the ISO/IEC 11801 Standard. The
11801 Standard establishes two applications referred to as Class C and
Class D. Cabling Links supporting Class C applications are specified up
to 16 MHz. Cabling Links supporting Class D applications are specified
up to 100 MHz.
When testing to Class C or Class D limits, use of the Modular Plug
Performance Module is recommended. If testing of the user patch
cords is required, the Modular Jack Performance Module can be
used with reduced accuracy.
NOTE
ScTP Class D and ISO 11801 Class D are equivalent, with the exception
that ScTP requires shield continuity.
Summary of Contents for SCAN-LAN VI
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