Seagate Savvio 10K Savvio 10K.2 SAS Product Manual - Page 33
Conducted noise immunity, Power sequencing, Current profiles
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6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. +5v = 250 mV pp from 0 to 100 kHz to 20 MHz. +12v = 800 mV pp from 100 Hz to 8 KHz. 450 mV pp from 8 KHz to 20 KHz. 250 mV pp from 20 KHz to 5 MHz. 6.2.2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. 6.2.3 Current profiles The +12V and +5V current profiles for the ST9146802SS and ST973402SS models are shown below. Figure 2. ST9146802SS current profile Savvio 10K.2 SAS Product Manual, Rev. D 27
Savvio 10K.2 SAS Product Manual, Rev. D
27
6.2.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power
connector.
6.2.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
6.2.3
Current profiles
The +12V and +5V current profiles for the ST9146802SS and ST973402SS models are shown below.
Figure 2.
ST9146802SS current profile
+5v
=
250 mV pp from 0 to 100 kHz to 20 MHz.
+12v
=
800 mV pp from 100 Hz to 8 KHz.
450 mV pp from 8 KHz to 20 KHz.
250 mV pp from 20 KHz to 5 MHz.