Acoustics; Electromagnetic Immunity - Seagate SV35 Series SATA Product Manual

2.10

Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-
surements 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.
For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is
Note.
defined by the following equation:
(Number of seeks per second = 0.4 / (average latency + average access time)
Drive acoustics, sound power
Model Idle
ST3500641SV 2.79 bels (typ)
2.96 bels (max)
ST3250824SV 2.67 bels (typ)
2.82 bels (max)
ST3160812SV 2.48 bels (typ)
2.64 bels (max)
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
Electrostatic discharge
Radiated RF immunity
Electrical fast transient
Surge immunity
Conducted RF immunity
Voltage dips, interrupts
18
Operational, DVR (Digital Video Recorder) seeks
2.71 bels (typ)
2.88 bels (max)
2.80 bels (typ)
2.90 bels (max)
2.53 bels (typ)
2.62 bels (max)
Description
Contact, HCP, VCP: ± 4 kV; Air:
± 8 kV
80 to 1,000 MHz, 3 V/m,
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
± 1 kV differential, ± 2 kV com-
mon, AC mains
150 kHz to 80 MHz, 3 Vrms,
80% AM with 1 kHz sine
0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
Performance Reference
level standard
B EN 61000-4-2: 95
A EN 61000-4-3: 96
ENV 50204: 95
B EN 61000-4-4: 95
B EN 61000-4-5: 95
A EN 61000-4-6: 97
C EN 61000-4-11: 94
C
C
B
SV35 Series SATA Product Manual, Rev. C