2.10Acoustics emissions
Drive emission of sound is measured consistent with the
Table 5: | Drive | |||
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| Idle[1] | CE seek profile | |
1000GB models | 2.1 bels (typ.) | 2.4 bels (typ.) | ||
2.3 bels (max.) | 2.5 bels (max.) | |||
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500, 320, 250 and 160GB models | 1.9 bels (typ.) | 2.3 bels (typ.) | ||
2.1 bels (max.) | 2.4 bels (max.) | |||
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[1]During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.
Test for Prominent Discrete Tones (PDTs)
Seagate follows the
* Defined as the median curve given by ISO
2.11Electromagnetic 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 6: | Radio frequency environments |
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Test |
| Description | Performance level | Reference standard |
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Electrostatic |
| Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV | B | |
discharge |
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Radiated RF |
| 80 to 1,000MHz, 3V/m, | A | |
immunity |
| 80% AM with 1kHz sine |
| ENV50204: 95 |
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| 900MHz, 3V/m, 50% pulse modulation @ 200Hz |
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Electrical fast | ± 1kV on AC mains, ± 0.5kV on external I/O | B | ||
transient |
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Surge immunity | ± 1kV differential, ± 2kV common, AC mains | B | ||
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Conducted RF | 150kHz to 80MHz, 3Vrms, 80% AM with 1kHz sine | A | ||
immunity |
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Voltage dips, |
| 0% open, 5 seconds | C | |
interrupts |
| 0% short, 5 seconds | C |
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| 40%, 0.10 seconds | C |
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| 70%, 0.01 seconds | B |
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Video 3.5 HDD Product Manual, Rev. J | 17 |