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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.
5–22 Hz
0.25 G
22–350 Hz
5.0 Gs
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)
Table 4:
Operating acoustics
Acoustic mode
Models
ST3400832ACE
ST3300831ACE
ST3250823ACE
ST3200826ACE
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
Test
Electrostatic discharge
Radiated RF immunity
Electrical fast transient
Surge immunity
Conducted RF immunity
DB35 Series Product Manual, Rev. B
Idle
Operational
2.6 bels (typ)
2.8 bels (typ)
2.8 bels (max)
3.0 bels (max)
2.4 bels (typ)
2.8 bels (typ)
2.7 bels (max)
3.0 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
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
11
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