Seagate ST3500321CS ユーザーズマニュアル
Pipeline HD Series SATA Product Manual, Rev. C
15
2.10
Acoustics emissions
Drive emission of sound is measured consistent with the ECMA-74 and its referenced standards. Testing is
conducted at room temperature (approximately 25 degrees C). Emission levels are reported as the total
A-weighted sound power levels for, steady state, idle and active (seek) modes of operations.
conducted at room temperature (approximately 25 degrees C). Emission levels are reported as the total
A-weighted sound power levels for, steady state, idle and active (seek) modes of operations.
[1]
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.
increase acoustic and power to operational levels.
Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this pro-
cess 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.
cess 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.
2.11
Electromagnetic immunity
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:
performance when subjected to the radio frequency (RF) environments defined in the following table:
Table 4:
Drive A-weighted Sound Power Levels (SWL, BA)
Idle[1]
CE seek profile
500 GB model
2.1 bels (typ)
2.3 bels (max)
2.4 bels (typ)
2.5 bels (max)
320 GB model
1.9 bels (typ)
2.1 bels (max)
2.3 bels (typ)
2.4 bels (max)
160 GB model
Table 5:
Radio frequency environments
Test
Description
Performance level
Reference standard
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 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
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