Seagate ST98823A Momentus 5400.2 PATA Product Manual - Page 19

2.11 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: Drive level acoustics Acoustic mode Idle* 2.4 bels (typ) 2.6 bels (max) Quiet Seek 2.6 bels (typ) 2.8 bels (max) Performance Seek 2.9 bels (typ) 3.1 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. 2.12 Electromagnetic immunity When properly installed in a representative host system, the drive operates without errors or degradation in performance when subjected to the rradio frequency (RF) environments defined in the following table: Table 5: Electromagnetic immunity Test Description Performance level Electrostatic discharge Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV B Radiated RF immunity 80 to 2,000 MHz, 10 V/m, A 80% AM with 1 kHz sine 900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz Electrical fast transient ± 1 kV on AC mains, ± 0.5 kV on external I/O B Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz A sine Power Frequency H-field 1 A/m, 50Hz/60Hz, 3 axes A immunity Voltage dips, interrupts 30% Reduction for 25 cycles C >95% Reduction for 250 cycles C >95%, 0.5 cycles 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 61000-4-8: 97 EN 61000-4-11: 94 A - 1) No upset or degradation in performance beyond manufacturer's specified limits. 2) No data loss. B - 1) Unit self recovers without user intervention. 2) No data loss. C - 1) Upset OK provided that unit will function after user intervention. Momentus 5400.2 Product Manual, Rev. D 13