1802.3by 25 Gb/s Task Group
802.3by 25 Gb/s Task GroupConsiderations for
Test Fixture Specifications
Chris DiMinicoMC Communications/[email protected]
2802.3by 25 Gb/s Task Group
Purpose
•Considerations for 802.3by 25 Gb/s test fixture specifications.•Update to diminico_25GE_01_1114.pdf achievability of SFP28 mated test fixtures HFSS models.•Measurements of SFP28 mated test fixtures compared to IEEE 802.3bj, Fibre Channel MSQS-2 mated test fixture specifications and OIF_CEI_3.1• Make progress on test fixture specifications pending other PMD/PHY decisions.
3802.3by 25 Gb/s Task Group
25 Gb/s Ethernet – Test Fixtures
92.11 Test Fixtures 92.11.1 TP2 or TP3 test fixtures (Host Compliance Boards)92.11.1.1 Test fixture return loss (Mated)92.11.1.2 Test fixture insertion loss (PCB reference insertion loss)
TP1 or TP2
•802.3bj clause 92
4802.3by 25 Gb/s Task Group
25 Gb/s Ethernet – Test Fixtures
92.11.2 Cable assembly test fixture (Module Compliance Board)>>>PCB reference insertion loss92.11.3 Mated test fixtures92.11.3.1 Mated test fixtures insertion loss >>>Figure of merit insertion loss deviation FOMILD92.11.3.2 Mated test fixtures return loss 92.11.3.3 Mated test fixtures common-mode conversion loss92.11.3.4 Mated test fixtures common-mode return loss92.11.3.5 Mated test fixtures common-mode to differential-mode return loss92.11.3.6 Mated test fixtures integrated crosstalk noise
•802.3bj clause 92
5802.3by 25 Gb/s Task Group
zSFP+ mated test fixture HFSS model
2.92 mm SMAHFSS model
HCB HFSS model from board files MCB HFSS model from board files
differential pairs ~3”
differential pairs ~2”zSFP+ HFSSConnector model
Source: diminico_25GE_01_1114.pdf
6802.3by 25 Gb/s Task Group
zSFP+ - MTF-Insertion loss -SDD12/SDD21
0
2
4
6
8
10
12
14
16
18
20
0 5 10 15 20 25
GHz
dB
SDD12-MTF-zSFP+
SDD21-MTF-zSFP+
802.3bj MTF IL -MIN
802.3bj MTF IL -MAX
zSFP+ - M T F-Return Loss -SDD11/SDD22
0
10
20
30
40
50
60
70
80
0 5 10 15 20 25GHz
dB
SDD11-MTF-zSFP+
SDD22-MTF-zSFP+
802.3bj MTF RL
zSFP+ - M T F-comm on-m ode to differential-m ode return Loss -SDC11/SDC22-
SCD11/SCD22
0
10
20
30
40
50
60
70
80
0 5 10 15 20 25GHz
dB
SDC11-MTF-zSFP+
SDC22-MTF-zSFP+
SCD11-MTF-zSFP+
SCD22-MTF-zSFP+
802.3bj D3.1 MTFCMDMRL
zSFP+ - MTF-Common-mode return loss -SCC11/SCC22
0
10
20
30
40
50
60
0 5 10 15 20 25
GHz
dB SCC11-MTF-zSFP+
SCC22-MTF-zSFP+
802.3bj MTFCMRL
25 Gb/s Ethernet – HFSS zSFP+ Mated Test Fixtures
Source: diminico_25GE_01_1114.pdf
7802.3by 25 Gb/s Task Group
25 Gb/s Ethernet – HFSS zSFP+ Mated Test Fixtures
zSFP+-MTF-Common-mode to differential-mode conversion insertion loss -SDC12/SDC21-SCD12/SCD21
0
10
20
30
40
50
60
70
80
0 5 10 15 20 25
GHz
dB
SDC12-MTF-zSFP+
SDC21-MTF-zSFP+
SCD12-MTF-zSFP+
SCD21-MTF-zSFP+
802.3bj MTFCMCL
Source: diminico_25GE_01_1114.pdf
8802.3by 25 Gb/s Task Group
SFP28 - Mated Test Fixtures – Insertion loss
SFP28-MTF-Insertion Loss (SDD12/SDD21)FOMILD
0
2
4
6
8
10
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14
16
18
20
0 5 10 15 20 25
GHz
dB
802.3bj MTF IL - MIN
802.3bj/MSQS-2/OIF-CEI-D03.0 MTF IL- MAX
SDD12-MTF-HCB1_MCB2_RD_zSFP
SDD21-MTF-HCB1_MCB2_RD_zSFP
SDD12-MTF-HCB1_MCB2_TD_zSFP
SDD21-MTF-HCB1_MCB2_TD_zSFP
SDD12-MTF-HCB1_MCB1_TD_zSFP
SDD21-MTF-HCB1_MCB1_TD_zSFP
SDD12-MTF-HCB1_MCB1_RD_zSFP
SDD21-MTF-HCB1_MCB1_RD_zSFP
Lane ILDrmsMated_HCB#1_MCB#1_RD 0.10283Mated_HCB#1_MCB#2_RD 0.10024Mated_HCB#1_MCB#1_TD 0.08896Mated_HCB#1_MCB#2_TD 0.08907
802.3bj FOMILD is calculated according to 93A.4 with fb=25.78125 GHz, Tt=9.6 ps, and fr=0.75 × fb. The fitted insertion loss and insertion loss deviation are computed over the range fmin=0.01 GHz to fmax=25 GHz.FOMILD shall be less than 0.13 dB.
9802.3by 25 Gb/s Task Group
SFP28 - Mated Test Fixtures – Insertion loss
SFP28-MTF-Insertion Loss (SDD12/SDD21)FOMILD
0
2
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14
16
18
20
0 5 10 15 20 25 30 35 40
GHz
dB
802.3bj MTF IL - MIN
MSQS-2/OIF-CEI-D03.0 MTF- ILMIN
802.3bj/MSQS-2/OIF-CEI-D03.0MTF IL - MAX
SDD12-MTF-HCB1_MCB2_RD_zSFP
SDD21-MTF-HCB1_MCB2_RD_zSFP
SDD12-MTF-HCB1_MCB2_TD_zSFP
SDD21-MTF-HCB1_MCB2_TD_zSFP
SDD12-MTF-HCB1_MCB1_TD_zSFP
SDD21-MTF-HCB1_MCB1_TD_zSFP
SDD12-MTF-HCB1_MCB1_RD_zSFP
SDD21-MTF-HCB1_MCB1_RD_zSFP
Lane ILDrms (0 .1 - 25 GHz) ILD rms (0.1 - 21 GHz)Mated_H CB#1_MCB#1_RD 0.10283 0.06861Mated_H CB#1_MCB#2_RD 0.10024 0.07062Mated_H CB#1_MCB#1_TD 0.08896 0.07866Mated_H CB#1_MCB#2_TD 0.08907 0.07813
OIF-CEI-D03.1 the ILDRMS (as calculated using the method defined in Section 10.2.6.4 and the curve fit method defined in Chapter 12 with f ILmax of 21 GHz and fILmin of 50 MHz) for the mated HCB and MCB pair is <=0.1 dB.
10802.3by 25 Gb/s Task Group
SFP28 - Mated Test Fixtures – Return loss
SFP28-MTF-Return Loss (SDD11/SDD22)
0
10
20
30
40
50
60
0 5 10 15 20 25
GHz
dB
802.3bj/MSQS-2/OIF-CEI-03.0 MTF RL
SDD11-MTF-HCB1_MCB2_RD_zSFP
SDD22-MTF-HCB1_MCB2_RD_zSFP
SDD11-MTF-HCB1_MCB2_TD_zSFP
SDD22-MTF-HCB1_MCB2_TD_zSFP
SDD11-MTF-HCB1_MCB1_RD_zSFP
SDD22-MTF-HCB1_MCB1_RD_zSFP
SDD11-MTF-HCB1_MCB1_TD_zSFP
SDD22-MTF-HCB1_MCB1_TD_zSFP
11802.3by 25 Gb/s Task Group
SFP28 - Mated Test Fixtures – Return loss
SFP28-MTF-Return Loss (SDD11/SDD22)
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35 40
GHz
dB
802.3bj/MSQS-2/OIF-CEI-03.0 MTF RL
SDD11-MTF-HCB1_MCB2_RD_zSFP
SDD22-MTF-HCB1_MCB2_RD_zSFP
SDD11-MTF-HCB1_MCB2_TD_zSFP
SDD22-MTF-HCB1_MCB2_TD_zSFP
SDD11-MTF-HCB1_MCB1_RD_zSFP
SDD22-MTF-HCB1_MCB1_RD_zSFP
SDD11-MTF-HCB1_MCB1_TD_zSFP
SDD22-MTF-HCB1_MCB1_TD_zSFP
12802.3by 25 Gb/s Task Group
SFP28-MTF- Common mode conversion insertion loss
SFP28-MTF-Common mode conversion insertion loss (SCD12/SCD21/SDC12/SDC21)
0
10
20
30
40
50
60
0 5 10 15 20 25
GHz
dB
802.3bj MTF CMCL
SDC12-MTF-HCB1_MCB2_RD_zSFP SDC21-MTF-HCB1_MCB2_RD_zSFP SCD12-MTF-HCB1_MCB2_RD_zSFP SCD21-MTF-HCB1_MCB2_RD_zSFP SDC12-MTF-HCB1_MCB2_TD_zSFP SDC21-MTF-HCB1_MCB2_TD_zSFP SCD12-MTF-HCB1_MCB2_TD_zSFP SCD21-MTF-HCB1_MCB2_TD_zSFP SDC12-MTF-HCB1_MCB1_TD_zSFP SDC21-MTF-HCB1_MCB1_TD_zSFP SCD12-MTF-HCB1_MCB1_TD_zSFP SCD21-MTF-HCB1_MCB1_TD_zSFP SDC12-MTF-HCB1_MCB1_RD_zSFP SDC21-MTF-HCB1_MCB1_RD_zSFP SCD12-MTF-HCB1_MCB1_RD_zSFP SCD21-MTF-HCB1_MCB1_RD_zSFP
13802.3by 25 Gb/s Task Group
SFP28-MTF- Common mode conversion insertion loss
SFP28-MTF-Common mode conversion insertion loss (SCD12/SCD21/SDC12/SDC21)
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35 40
GHz
dB
802.3bj MTF CMCL
MSQS-2/OIF-CEI-03.0 MTF -CMCLSDC12-MTF-HCB1_MCB2_RD_zSFP SDC21-MTF-HCB1_MCB2_RD_zSFP SCD12-MTF-HCB1_MCB2_RD_zSFP SCD21-MTF-HCB1_MCB2_RD_zSFP SDC12-MTF-HCB1_MCB2_TD_zSFP SDC21-MTF-HCB1_MCB2_TD_zSFP SCD12-MTF-HCB1_MCB2_TD_zSFP SCD21-MTF-HCB1_MCB2_TD_zSFP SDC12-MTF-HCB1_MCB1_TD_zSFP SDC21-MTF-HCB1_MCB1_TD_zSFP SCD12-MTF-HCB1_MCB1_TD_zSFP SCD21-MTF-HCB1_MCB1_TD_zSFP SDC12-MTF-HCB1_MCB1_RD_zSFP SDC21-MTF-HCB1_MCB1_RD_zSFP SCD12-MTF-HCB1_MCB1_RD_zSFP SCD21-MTF-HCB1_MCB1_RD_zSFP
14802.3by 25 Gb/s Task Group
SFP28 - MTF–Common mode conversion return loss
SFP28-MTF-Common mode conversion return loss (SCD11/SCD22/SDC11/SDC22)
0
10
20
30
40
50
60
70
80
0 5 10 15 20 25
GHz
dB
802.3bj MTF CMDMRL
SDC11-MTF-HCB1_MCB2_RD_zSFP SDC22-MTF-HCB1_MCB2_RD_zSFP SCD11-MTF-HCB1_MCB2_RD_zSFP SCD22-MTF-HCB1_MCB2_RD_zSFP SDC11-MTF-HCB1_MCB2_TD_zSFP SDC22-MTF-HCB1_MCB2_TD_zSFP SCD11-MTF-HCB1_MCB2_TD_zSFP SCD22-MTF-HCB1_MCB2_TD_zSFP SDC11-MTF-HCB1_MCB1_TD_zSFP SDC22-MTF-HCB1_MCB1_TD_zSFP SCD11-MTF-HCB1_MCB1_TD_zSFP SCD22-MTF-HCB1_MCB1_TD_zSFP SDC11-MTF-HCB1_MCB1_RD_zSFP SDC22-MTF-HCB1_MCB1_RD_zSFP SCD22-MTF-HCB1_MCB1_RD_zSFP SCD11-MTF-HCB1_MCB1_RD_zSFP
15802.3by 25 Gb/s Task Group
SFP28 - MTF–Common mode conversion return loss
SFP28-MTF-Common mode conversion return loss (SCD11/SCD22/SDC11/SDC22)
0
10
20
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40
50
60
70
80
0 5 10 15 20 25 30 35 40
GHz
dB
802.3bj MTF CMDMRL
MSQS-2/OIF-CEI-D03.0 CMDMRL
SDC11-MTF-HCB1_MCB2_RD_zSFP
SDC22-MTF-HCB1_MCB2_RD_zSFP
SCD11-MTF-HCB1_MCB2_RD_zSFP
SCD22-MTF-HCB1_MCB2_RD_zSFP
SDC11-MTF-HCB1_MCB2_TD_zSFP
SDC22-MTF-HCB1_MCB2_TD_zSFP
SCD11-MTF-HCB1_MCB2_TD_zSFP
SCD22-MTF-HCB1_MCB2_TD_zSFP
SDC11-MTF-HCB1_MCB1_TD_zSFP
SDC22-MTF-HCB1_MCB1_TD_zSFP
SCD11-MTF-HCB1_MCB1_TD_zSFP
SCD22-MTF-HCB1_MCB1_TD_zSFP
SDC11-MTF-HCB1_MCB1_RD_zSFP
SDC22-MTF-HCB1_MCB1_RD_zSFP
SCD22-MTF-HCB1_MCB1_RD_zSFP
SCD11-MTF-HCB1_MCB1_RD_zSFP
16802.3by 25 Gb/s Task Group
SFP28 - MTF – Common mode return loss
SFP28-MTF-Common mode return Loss (SCC11/SCC22)
0
10
20
30
40
50
60
0 5 10 15 20 25
GHz
dB
SCC11-MTF-HCB1_MCB2_RD_zSFP
SCC22-MTF-HCB1_MCB2_RD_zSFP
SCC11-MTF-HCB1_MCB2_TD_zSFP
SCC22-MTF-HCB1_MCB2_TD_zSFP
802.3bj D3.1 MTF CMRL
SCC11-MTF-HCB1_MCB1_TD_zSFP
SCC22-MTF-HCB1_MCB1_TD_zSFP
SCC11-MTF-HCB1_MCB1_RD_zSFP
SCC22-MTF-HCB1_MCB1_RD_zSFP
17802.3by 25 Gb/s Task Group
SFP28 - MTF – Common mode return loss
SFP28-MTF-Common mode return Loss (SCC11/SCC22)
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35 40
GHz
dB
SCC11-MTF-HCB1_MCB2_RD_zSFP
SCC22-MTF-HCB1_MCB2_RD_zSFP
SCC11-MTF-HCB1_MCB2_TD_zSFP
SCC22-MTF-HCB1_MCB2_TD_zSFP
802.3bj D3.1 MTF CMRL
SCC11-MTF-HCB1_MCB1_TD_zSFP
SCC22-MTF-HCB1_MCB1_TD_zSFP
SCC11-MTF-HCB1_MCB1_RD_zSFP
SCC22-MTF-HCB1_MCB1_RD_zSFP
18802.3by 25 Gb/s Task Group
Summary •Demonstration of achievability of compliance to 802.3bj mated test fixture specifications utilizing SFP28.•Measurements of SFP28 mated test fixtures compared to IEEE 802.3bj, Fibre Channel MSQS-2 mated test fixture specifications and OIF_CEI_3.1•Make progress on test fixture specifications pending other PMD/PHY decisions.•Future work: Review of mated test fixture return loss specifications based on measurement results.
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