Seagate ST973451SS, ST936751SS manual Peak-to, Sinusoidal, Jitter, Frequency in kHz

Figure 18 defines the sinusoidal jitter mask.

Peak-to-

peak	Sinusoidal jitter frequency
sinusoidal
	(log/log plot)
jitter
(in UI)	F		= 1.5 x 10 9 for 1.5 Gbps
		NOM
	F		= 3.0 x 10 9 for 3.0 Gbps
1.5		NOM
1.0
0.1
0
	FNOM / 25,000		FNOM / 1,667

Frequency (in kHz)

Figure 18. Sinusoidal jitter mask

9.5.2.2Transmitter 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 characteristica	Units	1.5 Gbps	3.0 Gbps
Skewb	ps	20	15
Tx Off Voltagec	mV(P-P)	< 50	< 50
Maximum rise/fall timed	ps	273	137
Minimum rise/fall timed	ps	67	67
Maximum transmitter output imbalancee	%	10	10
OOB offset deltaf	mV	± 25	± 25
OOB common mode deltag	mV	± 50	± 50

62 Savvio 15K SAS Product Manual, Rev. B