Seagate Cheetah NS SAS ST3400755SS, Product Manual

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64 Cheetah NS SAS Product Manual, Rev. B
Figure 34 shows the zero-length test load.
Figure 34. Zero-length test load
Figure 35 shows an ISI loss example at 3.0 Gbps.
Figure 35. ISI loss example at 3.0 Gbps
Figure 36 shows an ISI loss example at 1.5 Gbps.
Figure 36. 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