2.9Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). Discrete tone penalties are added to the A-weighted sound power (LW) with the following formula only when determin- ing compliance:

LWt(spec) == LW + 0.1Pt + 0.3 < 4.0 (Bels) where

LW = A-weighted sound power level

pt == Value of discrete tone penalty [==dLt-6.0 (dBA)]

dLt = Tone-to-noise ratio taken in accordance with ISO 7779 at each octave band.

All measurements 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.)

Table 6:

Drive level acoustics

 

Acoustic mode

 

 

 

Idle

 

Operational

 

 

 

1.6 bels (typ)

 

2.2 bels (typ)

 

 

 

2.10Electromagnetic 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 7:

Electromagnetic immunity

 

 

 

 

 

 

 

 

 

 

Performance

Reference

Test

 

Description

level

standard

 

 

 

 

Radiated RF immunity

80 to 1,000 MHz, 3 V/m,

A

EN 61000-4-3: 96

 

 

80% AM with 1 kHz sine

 

ENV 50204: 95

 

 

900 MHz, 3 V/m, 50% pulse modulation @ 200

 

 

 

 

Hz

 

 

 

 

 

 

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 common, AC mains

B

EN 61000-4-5: 95

 

 

 

 

Conducted RF immunity

150 kHz to 80 MHz, 3 Vrms, 80% AM with 1

A

EN 61000-4-6: 97

 

 

kHz sine

 

 

 

 

 

 

Voltage dips, interrupts

0% open, 5 seconds

C

EN 61000-4-11: 94

 

 

0% short, 5 seconds

C

 

 

 

40%, 0.10 seconds

C

 

 

 

70%, 0.01 seconds

B

 

 

 

 

 

 

Lyrion CE-ATA Product Manual, Rev. A

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Seagate Lyrion Series manual Acoustics, Electromagnetic immunity, Drive level acoustics

Lyrion Series specifications

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