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Novato en SATA!!

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Midle End Level

DeHyMo$

entradas: 129

14:08 15/12/2004

1

un preguntita!! saludops a to2 inicialmente!!
bueno la cosa es q entiendo q no allan jumpers para setiar el disco como master o slave, pero bueno tambien existe un jumper para activar el SSC del disco duro SATA y obviamente para desactiviarlo!! la cosa es q no c que es el SSC del disco?? gracias!

AMD Athlon 64 3500+
MSI K8N Neo2 Platinium Edition
Ati RAdeon 9600XT powered by Sapphire
2X256 RAM PC3200
WD 160GB SATA
RAIDMAX SCORPIO TOWER

Hardcore Extreme Level

Meko360

entradas: 3484

16:08 15/12/2004

2

El SSC no es nada que a vos a nivel usuario te interese. Está relacionado con la disminución de emisiones electromagnéticas del disco. No todos los discos SATA traen esto, es más mi HDD no trae ningun jumper.

Spread-spectrum clock generation

Spread-spectrum clock generation (SSCG) is used in the design of synchronous digital systems, especially those containing microprocessors, to reduce the spectral density of the electromagnetic interference (EMI) that these systems generate. A synchronous digital system is one that is driven by a clock signal that, because of its periodic nature, has an unavoidably narrow frequency spectrum. In fact, a perfect clock signal would have all its energy concentrated at a single frequency and its harmonics, and would therefore radiate energy with an infinite spectral density. Practical synchronous digital systems radiate electromagnetic energy in a number of narrow bands at the clock frequency and its harmonics, resulting in a frequency spectrum that, at certain frequencies, can exceed the regulatory limits for electromagnetic interference (e.g. those of the FCC in the United States, JEITA in Japan and the IEC in Europe).

To avoid this problem, which is of great commercial importance to manufacturers, spread-spectrum clocking is used. This consists of modulating the frequency of the clock signal by either a regular function such as a triangular wave, or by a pseudo-random function. This method distributes the energy of the clock signal over a wider frequency range, and so reduces its peak spectral density. The technique therefore reshapes the system's electromagnetic emissions to make them comply with the electromagnetic compatibility (EMC) regulations. It is a popular technique because it can be used to gain regulatory approval with only a simple modification to the equipment.

It is important to note that this method does not reduce the peak electrical or magnetic field strength emitted by the system, nor the total energy, and therefore does not make the system any less likely to interfere with sensitive equipment such as TV and radio receivers. It works because the EMI receivers used by EMC testing laboratories divide the electromagnetic spectrum into frequency bands approximately 120 kHz wide. If the system under test were to radiate all of its energy at one frequency, then this energy would fall into a single frequency band of the receiver, which would register a large peak at that frequency. Spread-spectrum clocking distributes the energy so that it falls into a large number of the receiver's frequency bands, without putting enough energy into any one band to exceed the statutory limits.

Hardcore Extreme Level

Meko360

entradas: 3484

16:09 15/12/2004

3

El SSC no es nada que a vos a nivel usuario te interese. Está relacionado con la disminución de emisiones electromagnéticas del disco. No todos los discos SATA traen esto, es más mi HDD no trae ningun jumper.

Spread-spectrum clock generation

Spread-spectrum clock generation (SSCG) is used in the design of synchronous digital systems, especially those containing microprocessors, to reduce the spectral density of the electromagnetic interference (EMI) that these systems generate. A synchronous digital system is one that is driven by a clock signal that, because of its periodic nature, has an unavoidably narrow frequency spectrum. In fact, a perfect clock signal would have all its energy concentrated at a single frequency and its harmonics, and would therefore radiate energy with an infinite spectral density. Practical synchronous digital systems radiate electromagnetic energy in a number of narrow bands at the clock frequency and its harmonics, resulting in a frequency spectrum that, at certain frequencies, can exceed the regulatory limits for electromagnetic interference (e.g. those of the FCC in the United States, JEITA in Japan and the IEC in Europe).

To avoid this problem, which is of great commercial importance to manufacturers, spread-spectrum clocking is used. This consists of modulating the frequency of the clock signal by either a regular function such as a triangular wave, or by a pseudo-random function. This method distributes the energy of the clock signal over a wider frequency range, and so reduces its peak spectral density. The technique therefore reshapes the system's electromagnetic emissions to make them comply with the electromagnetic compatibility (EMC) regulations. It is a popular technique because it can be used to gain regulatory approval with only a simple modification to the equipment.

It is important to note that this method does not reduce the peak electrical or magnetic field strength emitted by the system, nor the total energy, and therefore does not make the system any less likely to interfere with sensitive equipment such as TV and radio receivers. It works because the EMI receivers used by EMC testing laboratories divide the electromagnetic spectrum into frequency bands approximately 120 kHz wide. If the system under test were to radiate all of its energy at one frequency, then this energy would fall into a single frequency band of the receiver, which would register a large peak at that frequency. Spread-spectrum clocking distributes the energy so that it falls into a large number of the receiver's frequency bands, without putting enough energy into any one band to exceed the statutory limits.

Fuente Wikipedia.com

Midle End Level

DeHyMo$

entradas: 129

14:59 16/12/2004

4

jejjeje, toda la razon a nivel de usuario no me deberia importar!! pero bueno algo se aprendio!! es lo q pasaba es q a mi me gusta dejar la cagada en el Pc pa poder arreglarlo, y un dia active el SSC del disco SATA y bueno el disco se pegaba de vez en cuando, incluso llegue a perder partes de windows sin razones obvias aparentes, pero bueno ahora no le muevo mas el jumper, y muchas gracias!! =)

AMD Athlon 64 3500+
MSI K8N Neo2 Platinium Edition
Ati RAdeon 9600XT powered by Sapphire
2X256 RAM PC3200
WD 160GB SATA
RAIDMAX SCORPIO TOWER