1、2005-7-5 1 2005-7-5 2 2005-7-5 3 2005-7-5 4 2005-7-5 5 10Base-T 2005-7-5 6 10Base-T 2005-7-5 7 100Base-TX 2005-7-5 8 100Base-TX 2005-7-5 9 100Base-TX Scrambling 1 0 1 EMI 0 100Base-TX IDLE 12 0 96ns IEEE 802.3 112ns2005-7-5 10 1000Base-T 2005-7-5 11 1000Base-T 2005-7-5 12 MLT-3 PAM-5 31.25MHz EMI 20
2、05-7-5 13 1000Base-T 2005-7-5 14 2005-7-5 15 / Tektronix 2005-7-5 16 10Base-T 4 0 02005-7-5 17 10Base-T DUT DUT MAU TP_IDL DUT TP_Link DUT 1 0 Harmonic2005-7-5 18 10Base-T 2005-7-5 19 10Base-T 2005-7-5 20 10Base-T FAQ W/TPM Wo/TPM Load1 Load2 Load3 85 100 111ohm 2005-7-5 21 TP-IDL MAU TDSET3 IEEE802
3、.3 2005-7-5 22 4 4 4 0 0 02005-7-5 23 100Base-TX 2005-7-5 24 96ns2005-7-5 25 2005-7-5 26 2005-7-5 27 2005-7-5 28 2005-7-5 29 100Base-TX FAQ 96ns / 2005-7-5 30 4 0 0 0 0 1 42005-7-5 31 1000Base-T 4 IEEE 2005-7-5 32 IEEE 802.3ab DUT 4 2005-7-5 33 2005-7-5 34 2005-7-5 35 2005-7-5 36 2005-7-5 37 1000Bas
4、e-T 2005-7-5 38 ( ) 40.6.1.1.1 (D RJ45)2005-7-5 39 1000BaseT ( ) TX_TCLK 100ms 1 100ms 4 0 400ps 100ms = 250M 4 4 4 0 1ns/ 100ms = 10M 4 DSO 4 FastAcq 400,0002005-7-5 40 Jitter Waveform 0.990ns 1.010ns 0.980ns 1.020ns P 2 P 3 P 4 P 1 0.0ns 0.990ns 2.000ns 3.010ns 4.000ns -0.010ns 0.000ns +0.010ns Pe
5、riod Jitter 0.000ns Clock ( ) -0.015 -0.01 -0.005 0 0.005 0.01 0.015 Filter is applied to this waveform Pk-Pk is calculated2005-7-5 41 P 2 (8ns) P 1 (8ns) 0.0ns 8.010ns 16.566ns 0.010ns 0.566ns Jitter TX_TCLK J tx-out = 0.566ns 0.010ns = 0.0466ns2005-7-5 42 2005-7-5 43 2005-7-5 44 Tek 2005-7-5 45 DP
6、O 2005-7-5 46 2005-7-5 47 2005-7-5 48 10Base-T 100Base-TX 1000Base-T 2005-7-5 49 2005-7-5 50 2005-7-5 51 AWG AWG 4 1000Base-T 4 50ohm DUT 2 2005-7-5 52 2005-7-5 53 OPEN SHORT LOAD2005-7-5 54 2005-7-5 55 DUT 2005-7-5 56 2005-7-5 57 2005-7-5 58 2005-7-5 59 CSA7404B 1000Base-SX/LX 2005-7-5 60 CAT5 1.25G CSA7000B 2005-7-5 61
