Seagate ST9500530NS Constellation Serial ATA Product Manual - Page 21
Acoustics, Electromagnetic immunity
UPC - 715663213840
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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 3: Fluid Dynamic Bearing (FDB) motor acoustics ST9500530NS ST9160511NS Active 2.6 bels (typ) 2.5 bels (typ) Idle* 2.3 bels (typ) 2.1 bels (typ) *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 4: Radio frequency environments Test Description Performance level Electrostatic discharge Radiated RF immunity Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV B 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 Electrical fast ± 1 kV on AC mains, ± 0.5 kV on external I/O B transient Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B Conducted RF immunity Voltage dips, interrupts 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine A 0% open, 5 seconds! C! 0% short, 5 seconds! C! 40%, 0.10 seconds! C! 70%, 0.01 seconds B 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 61000-4-11: 94 Constellation Serial ATA Product Manual, Rev. B 15