Seagate Cheetah 15K.4 SAS, Product Manual

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70 Cheetah 15K.4 SAS Product Manual, Rev. B
Figure 26 shows the compliance interconnect test load.
Figure 26. Compliance interconnect test load
Figure 27 shows the zero-length test load.
Figure 27. Zero-length test load
Figure 28 shows an ISI loss example at 3.0 Gbps.
Figure 28. ISI loss example at 3.0 Gbps
Tx+
Tx-
10 nF 50 ohm
50 ohm
Probe
points
SAS internal connector
TCTF
10 nF
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