Seagate 100516232 User Manual
20
Constellation ES Serial ATA Product Manual, Rev. G
3.11
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.
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.
3.12
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:
performance when subjected to the radio frequency (RF) environments defined in the following table:
Table 6:
Radio frequency environments
Test
Description
Performance level
Reference standard
Electrostatic
discharge
discharge
Contact, HCP, VCP: ± 4
kV; Air:
± 8 kV
B
EN 61000-4-2: 95
Radiated RF
immunity
immunity
80 to 1000 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
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 common, AC mains
B
EN 61000-4-5: 95
Conducted RF
immunity
immunity
150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine
A
EN 61000-4-6: 97
Voltage dips,
interrupts
interrupts
0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
C
C
C
B
EN 61000-4-11: 94