Momentus 5400.6 SATA Product Manual, Rev. A
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2.11 Acoustics
Drive emission of sound is measured consistent with the ECMA-74 and its’ referenced standards. Testing is
conducted at room temperature (approximately 25°C). Emission levels are reported as the total A-weighted
sound power levels for steady state, idle, and active seek modes of operation.
*During periods of drive idle, some offline activity may occur accordin g to the S.M.A.R .T. specifica tion, whi ch may incre ase acoustic an d
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.
2.12 Electro magnetic 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 5: Drive A-weighted Sound Power Levels (SWL, BA)
Idle* Performance seek
2.4 bels (typ)
2.6 bels (max) 2.6 bels (typ)
2.7 bels (max)
Table 6: 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 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