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APPENDIX B: Cable Test Pass/Fail Limits
10BASE-T Pass/Fail Limits
10BASE-T Test Limits
Length
Length < 100 meters
Required Wire Pairs
1,2 and 3,6
Background Noise
Background Noise > NEXT + 6 dB
SNR
Between 5 and 10 MHz, SNR > 15 dB
Characteristic Impedance
100±25 ohms
NEXT
Between 5 and 10 MHz,
NEXT > 26–15 log (freq/10)
Attenuation
Between 5 and 10 MHz, Atten < 11.5 dB
Split Pair
NEXT < 20 dB
Содержание Scan-LAN 80
Страница 19: ...15 CHAPTER 3 Cable Tests Wiring 1 2 3 6 1 2 3 6 4 5 7 8 4 5 7 8 1 2 Open 3 6 Straight Thru 4 5 Open 7 8 Open...
Страница 22: ...18 SCAN LAN 80 CABLE SCANNER Wiring 1 2 3 6 1 2 3 6 4 5 7 8 4 5 7 8 1 2 Reversed 3 6 Reversed 4 5 Open 7 8 Open...
Страница 48: ...44 SCAN LAN 80 CABLE SCANNER Figure 5 1 Connecting Unterminated Cable 50 MINIMUM LENGTH...