Seagate ST160LT007 Momentus Thin (.2-4K) SATA Product Manual - Page 20

3.11 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. Table 5: Drive A-weighted Sound Power Levels (SWL, BA) Idle* 2.3 bels (typ) 2.5 bels (max) Performance seek 2.5 bels (typ) 2.7 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. 3.12 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 Electrostatic discharge Radiated RF immunity Electrical fast transient Surge immunity Conducted RF immunity Power Frequency H-field immunity Voltage dips, interrupts Description Performance level Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV B 80 to 2000 MHz, 10 V/m, A 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 B ± 1 kV differential, ± 2 kV common, AC mains B 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz A sine 1 A/m, 50Hz/60Hz, 3 axes A Reference standard EN 61000-4-2: 95 EN 61000-4-3: 96 ENV 50204: 95 EN 61000-4-4: 95 EN 61000-4-5: 95 EN 61000-4-6: 97 EN 61000-4-8: 97 30% Reduction for 25 cycles >95% Reduction for 250 cycles >95%, 0.5 cycles C EN 61000-4-11: 94 C B 14 Momentus Thin Product Manual, Gen-2 Rev. D