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DB35 Series Product Manual, Rev. B 11
2.8.6.2 Nonoperating vibration
The following table lists the maximum nonoperating vibration that the drive may experience without incurring
physical damage or degradation in performance when subsequently put into operation.
2.9 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.
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)
2.10 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
5–22 Hz 0.25 G
22–350 Hz 5.0 Gs
Table 4: Operating acoustics
Acoustic mode
Models Idle Operational
ST3400832ACE 2.6 bels (typ)
2.8 bels (max)
2.8 bels (typ)
3.0 bels (max)
ST3300831ACE
ST3250823ACE
ST3200826ACE
2.4 bels (typ)
2.7 bels (max)
2.8 bels (typ)
3.0 bels (max)
Test Description
Performance
level
Reference
standard
Electrostatic discharge Contact, HCP, VCP: ± 4 kV; Air:
± 8 kV
B EN 61000-4-2: 95
Radiated RF immunity 80 to 1,000 MHz, 3 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse
modulation @ 200 Hz
A EN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient ± 1 kV on AC mains, ± 0.5 kV on
external I/O
B EN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV com-
mon, AC mains
B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms,
80% AM with 1 kHz sine
A EN 61000-4-6: 97