Seagate ST600MP0074, Руководство по эксплуатации продукта

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62 Savvio 15K SAS Product Manual, Rev. B
Figure 18 defines the sinusoidal jitter mask.
Figure 18. Sinusoidal jitter mask
9.5.2.2 Transmitter signal characteristics
Table 17 specifies the signal requirements at the transmitter end of a TxRx connection as measured into the
zero-length test load. All specifications are based on differential measurements.
The OOB sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate.
Table 17 specifies the signal characteristics.
Table 17: Transmitter signal characteristics
Signal characteristic
a
Units 1.5 Gbps 3.0 Gbps
Skew
b
ps 20 15
Tx Off Voltage
c
mV(P-P) < 50 < 50
Maximum rise/fall time
d
ps 273 137
Minimum rise/fall time
d
ps 67 67
Maximum transmitter output imbalance
e
% 10 10
OOB offset delta
f
mV
±
25
±
25
OOB common mode delta
g
mV
±
50
±
50
F
NOM
/ 25,000 F
NOM
/ 1,667
Sinusoidal jitter frequency
(log/log plot)
Peak-to-
peak
sinusoidal
jitter
(in UI)
F
NOM
= 1.5 x 10
9
for 1.5 Gbps
F
NOM
= 3.0 x 10
9
for 3.0 Gbps
1.5
0
0.1
Frequency (in kHz)
1.0