Acoustics; Electromagnetic Immunity - Seagate ST9500325AS Product Manual

2.11 A
COUSTICS
Drive emission of sound is measured consistent with the ECMA-74 and its' referenced standards. Testing is conducted at
room temperature (approximately 25
state, idle, and active seek modes of operation.
Table 7 Drive A-weighted Sound Power Levels (SWL, BA)
I *
DLE
ST9500325AS, ST9500325ASG,
ST9320325AS, ST9320325ASG,
ST9250315AS, ST9250315ASG,
ST9160314AS, ST9160314ASG,
ST9120315AS, ST9120315ASG,
ST980313AS, ST980313ASG
2.4 bels (typ)
2.6 bels (max)
*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.
Test for Prominent Discrete Tones (PDTs)
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.
2.12 E
LECTROMAGNETIC 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:
Table 8 Radio frequency environments
T
EST
Electrostatic discharge
Radiated RF immunity
Electrical fast transient
Surge immunity
Conducted RF immunity
Power Frequency H-field
immunity
Voltage dips, interrupts
M 5400.6 SATA P
OMENTUS
C). Emission levels are reported as the total A-weighted sound power levels for steady
°
P
ERFORMANCE SEEK
ST9500325AS, ST9500325ASG,
ST9320325AS, ST9320325ASG,
ST9250315AS, ST9250315ASG,
ST9160314AS, ST9160314ASG
2.6 bels (typ)
2.7 bels (max)
D
ESCRIPTION
Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV
80 to 2,000 MHz, 10 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
± 1 kV on AC mains, ± 0.5 kV on external I/O
± 1 kV differential, ± 2 kV common, AC mains
150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz
sine
1 A/m, 50Hz/60Hz, 3 axes
30% Reduction for 25 cycles
>95% Reduction for 250 cycles
>95%, 0.5 cycles
M , R . G
RODUCT ANUAL EV
ST9120315AS, ST9120315ASG,
ST980313AS, ST980313ASG
2.5 bels (typ)
2.6 bels (max)
P R
ERFORMANCE EFERENCE
LEVEL STANDARD
B EN 61000-4-2: 95
A EN 61000-4-3: 96
ENV 50204: 95
B EN 61000-4-4: 95
B EN 61000-4-5: 95
A EN 61000-4-6: 97
A EN 61000-4-8: 97
C EN 61000-4-11: 94
C
B
17