Seagate Cheetah 15K Product Manual page 80

Figure 22 shows the zero-length test load.
50 ohm
10 nF
Tx+
Probe
points
10 nF 50 ohm
Tx-
SAS internal connector
Figure 22. Zero-length test load
Figure 23 shows an ISI loss example at 3.0 Gbps.
S (dB)
21
Compliance interconnect magnitude response and
0
ISI loss
> 3.9 dB
-10.9 dB
0.3
1.5
Figure 23. ISI loss example at 3.0 Gbps
Figure 24 shows an ISI loss example at 1.5 Gbps.
S (dB)
21
0
ISI loss
> 2.0 dB
-5.4 dB
0.15
0.75
Figure 24. ISI loss example at 1.5 Gbps
76
ISI loss example for 3.0 Gbps
Sample com pliance interconnect
Frequency (GHz)
3.0
Compliance interconnect magnitude response and ISI
loss example for 1.5 Gbps
Sam ple com pliance interconnect
1.5
Frequency (GHz)
Cheetah 15K.6 SAS Product Manual, Rev. B