Seagate Enterprise Capacity 2.5 HDD v3 SATA Product Manual, Rev. E
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2.8
Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this process is the use of the
absolute threshold of hearing. Seagate uses this threshold curve (originated in ISO 389-7) to discern tone audibility and to compensate
for the inaudible components of sound prior to computation of tone ratios according to Annex D of the ECMA-74 standards.
2.9
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
Description
Performance
Level/Criteria
Reference
standard
Electrostatic
discharge
Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV
B
EN 61000-4-2
Radiated RF
immunity
80 to 1000 MHz, 6 V/m,
80% AM with 1 kHz sine
A
EN 61000-4-3:
Electrical fast
transient
± 1 kV on AC mains, ± 0.5 kV on external I/O
B
EN 61000-4-4:
Surge immunity
± 1 kV differential, ± 2 kV common, AC mains
B
EN 61000-4-5:
Conducted RF
immunity
150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine
A
EN 61000-4-6:
Power Frequency
Magnetic Field
1A/m three axis es
A
EN 61000-4-8:
Voltage dips,
interrupts
# of Events
% Reduction
Duration
Phase Angle
1
1
3
3
3
EN 61000-4-11:
3
3
3
3
1
100%
100%
30%
30%
100%
0.5 Cycles
0.5 Cycles
30 Cycles
30 Cycles
300 Cycles
0°
180°
0°
180°
0°
