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APPENDIX B: EIA/TIA TSB-40A Compliance
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Table B-1. Results of TSB-40A Compliance Testing, Part 1:
Typical Near-End Crosstalk Measurements
NEXT Measurements for the Primary Surge Protector (SP250A)
SOURCE/VICTIM PAIRS
Freq. 1-2/3-6 1-2/4-5 1-2/7-8 3-6/4-5 3-6/7-8 4-5/7-8 SPEC
(MHz) (dB) (dB) (dB) (dB) (dB) (dB) (dB)
1 >80 >80 >80 >80 >80 >80 >65
4 78 71.0 >80 75.0 73.0 77.0 >65
8 75 66.0 >80 70.0 77.0 66.0 62
10 70 63.0 >80 68.0 74.0 69.0 60
16 66 59.3 >80 64.0 80.0 72.0 56
20 65 57.6 >80 62.0 >80 66.0 54
25 64 56.0 >80 60.0 71.0 63.0 52
31.25 62 54.0 >80 58.0 66.0 61.0 50
62.5 54 48.6 80.0 51.0 60.0 58.0 44
100 48 52.0 59.0 45.0 56.0 43.0 40
NEXT Measurements for the Secondary Surge Protector (SP251A)
SOURCE/VICTIM PAIRS
Freq. 1-2/3-6 1-2/4-5 1-2/7-8 3-6/4-5 3-6/7-8 4-5/7-8 SPEC
(MHz) (dB) (dB) (dB) (dB) (dB) (dB) (dB)
1 >80 >80 >80 >80 >80 >80 >65
4 77 74.0 >80 73.0 >80 74.0 >65
8 73 63.0 >80 68.0 75 69.0 62
10 67 67.3 >80 62.0 68.9 66.0 60
16 65 69.0 >80 58.0 68 62.0 56
20 64 63.0 >80 57.0 72 61.0 54
25 62 61.0 75.0 56.5 64 62.4 52
31.25 59 61.0 77.0 54.0 62 57.0 50
62.5 53 59.3 77.0 49.0 54.7 50.0 44
100 64 52.0 69.0 45.4 51 46.0 40
Appendix B: EIA/TIA TSB-40A
Compliance