Seagate ST33000651AS manual Test for Prominent Discrete Tones PDTs, Electromagnetic immunity

www.seagate.com Drive Specifications

2.8.1 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.

2.9Electromagnetic 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	Reference
			standard
Electrostatic	Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV	B	EN61000-4-2: 95
discharge
Radiated RF	80 to 1,000MHz, 3 V/m,	A	EN61000-4-3: 96
immunity	80% AM with 1kHz sine		ENV 50204: 95
	900MHz, 3 V/m, 50% pulse modulation @
	200Hz
Electrical fast	± 1 kV on AC mains, ± 0.5 kV on external I/O	B	EN61000-4-4: 95
transient
Surge immu-	± 1 kV differential, ± 2 kV common, AC mains	B	EN61000-4-5: 95
nity
Conducted RF	150kHz to 80MHz, 3 Vrms, 80% AM with 1kHz	A	EN61000-4-6: 97
immunity	sine
Voltage dips,	0% open, 5 seconds	C	EN61000-4-11: 94
interrupts	0% short, 5 seconds	C
	40%, 0.10 seconds	C
	70%, 0.01 seconds	B

Barracuda XT SATA Product Manual, Rev. D 19