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APPENDIX B: EIA/TIA TSB-40A Compliance
Table B-3. Results of TSB-40A Compliance Testing, Part 3:
Typical Return-Loss Measurements
Return-Loss Measurements for the Primary Surge Protector (SP250A)
Freq. Pins 1-2 Pins 3-6 Pins 4-5 Pins 7-8 SPEC
(MHz) (dB) (dB) (dB) (dB) (dB)
1 27.4 27.6 28.4 28.0 23
4 37.3 38.0 49.0 42.5 23
8 40.8 42.3 37.8 38.7 23
10 39.6 40.0 35.7 35.4 23
16 37.0 34.0 32.3 33.0 23
20 35.0 30.8 31.0 31.6 23
25 34.5 24.4 29.8 30.4 14
31.25 35.0 23.5 30.0 30.5 14
62.5 24.2 28.7 22.0 22.5 14
100 19.0 27.0 18.3 19.0 14
Return-Loss Measurements for the Secondary Surge Protector (SP251A)
Freq. Pins 1-2 Pins 3-6 Pins 4-5 Pins 7-8 SPEC
(MHz) (dB) (dB) (dB) (dB) (dB)
1 27.3 27.6 28.5 28.0 23
4 38.2 37.2 48.6 42.4 23
8 42.0 40.4 39.4 30.4 23
10 41.4 38.6 36.4 38.6 23
16 38.8 32.7 33.4 35.3 23
20 37.0 28.4 31.8 33.4 23
25 34.9 25.2 30.7 32.2 14
31.25 35.0 22.0 31.4 33.0 14
62.5 27.0 25.3 24.0 25.0 14
100 21.5 25.0 19.8 21.8 14
