Seagate ST400FM0012 ユーザーズマニュアル
P
ULSAR
.2 SAS P
RODUCT
M
ANUAL
, R
EV
. C
24
6.3.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a defined frequency. Maximum allowed noise values given
below are peak-to-peak measurements and apply at the drive power connector.
below are peak-to-peak measurements and apply at the drive power connector.
6.3.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.
6.3.3
Current profiles
The +12V and +5V current profiles for the Pulsar.2 drives are shown below.
Figure 1.
Current profiles for 800GB models
+5v
=
250 mV pp from 100 Hz to 20 MHz.
+12v
=
450 mV pp from 100 Hz to 100 KHz.
250 mV pp from 100 KHz to 20 MHz.
150 mV pp from 20 MHz to 80 MHz.