Seagate SV35 SV35.3 Series SATA Product Manual - Page 23
Acoustics, Electromagnetic immunity
UPC - 000068216948
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2.10 Acoustics Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All measurements are consistent with ISO document 7779. Sound power measurements are taken under essentially free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward. Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is defined by the following equation: (Number of seeks per second = 0.4 / (average latency + average access time) Table 4: Fluid Dynamic Bearing (FDB) motor acoustics Idle* CE Seek ST31000340SV ST3750330SV ST3500320SV 2.7 bels (typ) 2.9 bels (max) 2.8 bels (typ) 3.0 bels (max) ST3250310SV 2.5 bels (typ) 2.8 bels (max) 2.6 bels (typ) 2.8 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. 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 5: Radio frequency environments Test Description Performance level Reference standard Electrostatic Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV B discharge EN 61000-4-2: 95 Radiated RF immunity 80 to 1,000 MHz, 3 V/m, A 80% AM with 1 kHz sine 900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz EN 61000-4-3: 96 ENV 50204: 95 Electrical fast ± 1 kV on AC mains, ± 0.5 kV on external I/O B transient EN 61000-4-4: 95 Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B EN 61000-4-5: 95 Conducted RF 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine A immunity 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 EN 61000-4-11: 94 C C B SV35.3 Series Serial ATA Product Manual, Rev. B 17