Seagate Cheetah NS 10K Product Manual page 70

Figure 34 shows the zero-length test load.
50 ohm
10 nF
Tx+
Probe
points
10 nF 50 ohm
Tx-
SAS internal connector
Figure 34. Zero-length test load
Figure 35 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 35. ISI loss example at 3.0 Gbps
Figure 36 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 36. ISI loss example at 1.5 Gbps
64
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 NS SAS Product Manual, Rev. A