Seagate Cheetah 15K.5 SAS Series, Product Manual

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70 Cheetah 15K.5 SAS Product Manual, Rev. C
Figure 24 shows the zero-length test load.
Figure 24. Zero-length test load
Figure 25 shows an ISI loss example at 3.0 Gbps.
Figure 25. ISI loss example at 3.0 Gbps
Figure 26 shows an ISI loss example at 1.5 Gbps.
Figure 26. ISI loss example at 1.5 Gbps
Tx+
Tx-
10 nF
50 ohm
50 ohm
Probe
points
SAS internal connector
10 nF
ISI loss
> 3.9 dB
-10.9 dB
Frequency (GHz)
Sample compliance interconnect
0
3.0 1.5
0.3
S
21
(dB)
Compliance interconnect magnitude response and
ISI loss example for 3.0 Gbps
ISI loss
> 2.0 dB
Frequency (GHz)
Sample compliance interconnect
0
1.5 0.75
0.15
S
21
(dB)
Compliance interconnect magnitude response and ISI
loss example for 1.5 Gbps
-5.4 dB