ppi mcb and hcb results per of cl86 -...
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IEEE P802.3ba Meeting1
A. Ghiasi 1/15
PPI MCB and HCB Results Per of CL86
IEEE 802.3 Interim MeetingQuebec City
May 4, 2009
Ali Ghiasi and Yunong GanBroadcom Corporation [email protected]
802.3 HSSGNov 13, 2007
IEEE P802.3ba Meeting2
A. Ghiasi 2/15
QSFP HCB and MCB Representations
• Target specifications is 86.7.1.1– Approximate connector loss, MCB, and HCB at 5.5 Ghz is listed on the figure.
HCB
Connector
MCB
1.3 dB
0.5 dB
0.7 dB
IEEE P802.3ba Meeting3
A. Ghiasi 3/15
QSFP HCB and MCB Picture
42 mm
2x C
al T
race
SMPConnector
IEEE P802.3ba Meeting4
A. Ghiasi 4/15
QSFP MCBHCB Measured Results
• Reflection and high frequency loss expected to improve with back drilling
IEEE P802.3ba Meeting5
A. Ghiasi 5/15
QSFP MCBHCB Measured Results
• NEXT and FEXT shown for worst signal pair(N
EX
T)(F
EX
T)
Current NEXTMask
Possible FEXTMask
IEEE P802.3ba Meeting6
A. Ghiasi 6/15
SFP+ MCB and HCB Return Loss • Broadcom MCB Rev2 + Spirent Rev F HCB
IEEE P802.3ba Meeting7
A. Ghiasi 7/15
SFP+ MCBHCB • SDD21 must be met from 0.511 GHz
– At 5.5 GHz the is 2 dB +0.35 dB/0.25 dB
IEEE P802.3ba Meeting8
A. Ghiasi 8/15
SFP+ MCBHCB NEXT• Shows the NEXT, SFP+ mask, as well as single ended S(1,2)
IEEE P802.3ba Meeting9
A. Ghiasi 9/15
Summary• MCB uses RO4350B differential stripline• HCB uses RO4350B differential CPW for improve isolation• Due to not back drilling and one of the dimension being off slightly
the board had higher return loss than the CL86 SDDxx masks.– Some of this can also be due to calibration to SMP connector and using standard
grade SMASMP cable.– Fundamentally there is not a reason not to meet the SDDxx masks.
• Due to reflective loss the SDDxy high frequency loss is higher• We are in process of back drilling the board and looking into SMP
calibration.• QSFP max NEXT has improved by about 8 dB but FEXT the FEXT
is worse by about 6 dB compare to SFP+.– Using PFEXT and PNEXT might be better way to specify the (N1)NEXT and N.FEXT.
IEEE P802.3ba Meeting10
A. Ghiasi 10/15
PPI HCB and MCB PCB Target Loss
• Current CL86 MCB and HCB loss
SDD21 dB MCB= −0 . 0006−0 .1600 xsqrt f −0 . 0587 xf SDD21 dB HCB= −0 . 01−0 .30 xsqrt f −0 .11 xf
0 1 2 3 4 5 6 7 8 9 10 112.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
MCB
HCB
Frequncy (GHz)
SD
D21
/SD
D12
(dB
)
IEEE P802.3ba Meeting11
A. Ghiasi 11/15
PPI MCBHCB Mated SDD21/SDD12 Response
• Current CL86 SDD12/SDD21
SDD21 dB min≤−0 .029−0 .861∗ f −0 .158∗ fSDD21 dB min≤−0 .2−0 .65∗ f
f in GHz from 0.01 to 5.5 GHzf in GHz from 5.5 to 11.1 GHz
SDD21 dB max≥0 .109−0 .654∗ f −0 .120∗ f f in GHz from 0.01 to 11.1 GHz
0 1 2 3 4 5 6 7 8 9 10 117
6.5
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
Max
Min
Frequncy (GHz)
SD
D21
/SD
D12
(dB
)
IEEE P802.3ba Meeting12
A. Ghiasi 12/15
Mated MCBHCB SDD11/SDD22 Response
• Current CL86 SDD11/SDD22
SDDxx dB ≤−202 . 75∗ fSDDxx dB ≤−14 .5
SDDxx dB ≤−23. 258. 75∗ f /5
f in GHz from 0.01 to 2 GHzf in GHz from 2 to 5 GHzf in GHz from 5 to 11.1 GHz
MCBReponseSDDxx dB ≤−202∗ f
SDDxx dB ≤−15SDDxx dB ≤−13.828.85∗log10 f /5.5
f in GHz from 0.01 to 2.5 GHzf in GHz from 2.5 to 5 GHzf in GHz from 5 to 11.1 GHz
HCBReponse
IEEE P802.3ba Meeting13
A. Ghiasi 13/15
Mated MCBHCB SCC11/SCC22 Response
• Current CL86 SCC11/SCC22
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1512
11
10
9
8
7
6
5
4
3
2
1
SCC
Frequency (GHz)
SC
C11
/SC
C22
(dB
)
SCC11 dB ≤−122 .8∗ fSCC22 dB ≤−5.20 . 08∗ f
f in GHz from 0.01 to 2.5 GHzf in GHz from 2.5 to 15 GHz
IEEE P802.3ba Meeting14
A. Ghiasi 14/15
Mated MCBHCB SCD21/SCD12
• Current CL86 SCD21/SCD12
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1530
28
26
24
22
20
18
16
14
12
SCD
Frequency (GHz)
SC
D21
/SC
D12
(dB
)SCD12 dB ≤−302 .91∗ f
SCD21 dB ≤−14f in GHz from 0.01 to 5.5 GHzf in GHz from 5.5 to 15 GHz
IEEE P802.3ba Meeting15
A. Ghiasi 15/15
Mated MCBHCB NEXT and FEXT TBD
• Current CL 86 NEXT
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1560
55
50
45
40
35
30
25
NEXT
Frequency (GHz)
Diff
eren
tial N
EX
T(dB
)