Seagate ST3250824SV ユーザーズマニュアル

18

SV35 Series SATA Product Manual, Rev. C

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-
surements are consistent with ISO document 7779. Sound power measurements are taken under essentially 
free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is 
defined by the following equation:

 

 

(Number of seeks per second = 0.4 / (average latency + average access time)

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

ST3500641SV

2.79 bels (typ)

 

2.96 bels (max)

2.71 bels (typ)

 

2.88 bels (max)

ST3250824SV

2.67 bels (typ)

 

2.82 bels (max)

2.80 bels (typ)

 

2.90 bels (max)

ST3160812SV

2.48 bels (typ)

 

2.64 bels (max)

2.53 bels (typ)

 

2.62 bels (max)

 

 

Electrostatic discharge

Contact, HCP, VCP: ± 4

 

kV; Air:

 

± 8 kV

B

EN 61000-4-2: 95

Radiated RF immunity

80 to 1,000 MHz, 3 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 com-

mon, 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

Voltage dips, interrupts

0% open, 5 seconds

 

0% short, 5 seconds

 

40%, 0.10 seconds

 

70%, 0.01 seconds

C

 

C

 

C

 

B

EN 61000-4-11: 94