Seagate ST3146855SS, ST3300655SS, ST373455SS, ST373455SSIM 70, Figure 24 shows the zero-length test load., Figure 25 shows an ISI loss example at 3.0 Gbps., Figure 26 shows an ISI loss example at 1.5 Gbps.

70
Cheetah 15K.5 SAS Product Manual, Rev. E
Figure 24 shows the zero-length test load.
Figure 24. Zero-l ength 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
-1
0.9 dB
Frequency (GHz)
Sample com pliance interconnect
0
3.01.5
0.3
S21 (dB)
Compliance interconnect magnitude response and
ISI loss example f or 3.0 Gbps
ISI loss
> 2.0 dB
Frequency (GHz)
Sam p le comp liance inte rco n nect
0
1.50.75
0.15
S21 (dB)
Comp lia nce interconnect m a gn itude response and I S I
loss example for 1.5 Gbps
-5.4 dB