Seagate ST9320328CS ユーザーズマニュアル

12

Pipeline HD Mini Series SATA Product Manual, Rev. E

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power 

to operational levels.

Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this process 
is the use of the absolute threshold of hearing. Seagate uses the lower limit for the threshold curve* to discern tone 
audibility and to compensate for the inaudible components of sound prior to computation of tone ratios according to 
Annex D of the ECMA-74 standards.

*Defined as the median curve given by ISO 389-7 (Tf curve) minus 10dB at all frequencies.

When properly installed in a representative host system, the drive operates without errors or degradation in perfor-
mance when subjected to the radio frequency (RF) environments defined in the following table:

2.1 bels (typ) 

2.2 bels (max)

2.3 bels (typ) 

2.4 bels (max)

2.0 bels (typ) 

2.1 bels (max)

2.1 bels (typ) 

2.2 bels (max)

Electrostatic discharge

Contact, HCP, VCP: 

± 4

 

kV; Air:

 

± 8 kV

B

EN 61000-4-2: 95

Radiated RF immunity

80 to 2,000 MHz, 10 V/m,  

80% AM with 1 kHz sine 

900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz

A

EN 61000-4-3: 96 

ENV 50204: 95

Electrical fast transient

± 1 kV on AC mains, ± 0.5 kV on external I/O

B

EN 61000-4-4: 95

Surge immunity

± 1 kV differential, ± 2 kV common, AC mains

B

EN 61000-4-5: 95

Conducted RF immunity

150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz 

sine

A

EN 61000-4-6: 97

Power Frequency H-field 

immunity

1 A/m, 50Hz/60Hz, 3 axes

A

EN 61000-4-8: 97

Voltage dips, interrupts

30% Reduction for 25 cycles 

>95% Reduction for 250 cycles 

>95%, 0.5 cycles

C 

C 

B

EN 61000-4-11: 94