Intel 31244 PCI-X ユーザーズマニュアル
62
Test Methodology
The SATA specification defines
for the legal signaling levels
and jitter.
Several of oscilloscopes provide eye pattern masking options to allow the user to set up a mask for
serial data streams such as Serial ATA. Automating this measurement through oscilloscope eye
mask setup takes a the qualitative guess work out of eye pattern analysis.
serial data streams such as Serial ATA. Automating this measurement through oscilloscope eye
mask setup takes a the qualitative guess work out of eye pattern analysis.
Figure 24.
Serial ATA Eye Diagram
B0606-01
+Vmax
+Vmin
V
2
-Vmax
-Vmin
T
1
T
2
T
3
T
4
T
5
T
6
T
7
T
8
Illegal
Region
Table 27.
Timing Requirement
Name
Definition
Notes
Tjitter
t3 -t1
t3 - t1 = t8 - t6
T
t7 - t2
t2 - t1 = t3 - t2
t7 - t6 = t8 - t7
Vdiff
V2 - V1