Acoustics Emissions; Electromagnetic Immunity - Seagate ST31000322CS Product Manual

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.
Table 5: Drive A-weighted Sound Power Levels (SWL, BA)
1000GB models
500, 320, 250 and 160GB models
[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.
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.
* 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:
Table 6: Radio frequency environments
Test Description
Electrostatic Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV
discharge
Radiated RF 80 to 1,000MHz, 3V/m,
immunity 80% AM with 1kHz sine
900MHz, 3V/m, 50% pulse modulation @ 200Hz
Electrical fast ± 1kV on AC mains, ± 0.5kV on external I/O
transient
Surge immunity ± 1kV differential, ± 2kV common, AC mains
Conducted RF 150kHz to 80MHz, 3Vrms, 80% AM with 1kHz sine
immunity
Voltage dips, 0% open, 5 seconds
interrupts 0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
Pipeline HD.2 Series SATA Product Manual, Rev. E
[1]
CE seek profile
Idle
2.1 bels (typ.) 2.4 bels (typ.)
2.3 bels (max.) 2.5 bels (max.)
1.9 bels (typ.) 2.3 bels (typ.)
2.1 bels (max.) 2.4 bels (max.)
Performance level Reference standard
B EN61000-4-2: 95
A EN61000-4-3: 96
ENV50204: 95
B EN61000-4-4: 95
B EN61000-4-5: 95
A EN61000-4-6: 97
C EN61000-4-11: 94
C
C
B
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