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Avisos regulamentares

Interferência electromagnética (EMI) é qualquer sinal ou emissão, irradiada em espaço livre ou transmitida através de condutores de alimentação ou de sinais, que coloque em risco

o funcionamento de um serviço de navegação de rádio ou outro serviço de segurança, ou que prejudique seriamente, obstrua ou interrompa repetidamente um serviço licenciado de comunicação de rádio. Os serviços de comunicação de rádio incluem, mas não se limitam a, difusão comercial de AM/FM, televisão, serviços de telefone celular, radar, controlo de tráfego aéreo, pager e serviços de comunicações pessoais (PCS). Esses serviços licenciados, juntamente com irradiadores involuntários como dispositivos digitais, incluindo computadores, contribuem para o ambiente electromagnético.

Compatibilidade electromagnética (EMC) é a capacidade que os componentes de um equipamento electrónico têm de funcionar correctamente em conjunto no ambiente electrónico. Embora este computador tenha sido concebido e considerado

em conformidade com os limites estabelecidos pelos órgãos de regulamentação para EMI, não existem garantias de que não ocorrerão interferências numa instalação específica. Se o equipamento provocar interferências nos serviços de comunicações de rádio, o que pode ser determinado ligando e desligando o equipamento, experimente corrigir a interferência através de uma ou mais das seguintes medidas:

Reorientar a antena receptora.

Deslocar o computador em relação ao receptor.

Afastar o computador do receptor.

Ligar o computador a outra tomada, de modo que o computador e o receptor fiquem em circuitos de derivação diferentes.

Se necessário, contacte um representante do suporte técnico da Dell ou um técnico experiente de rádio/televisão para obter outras sugestões.

Para obter informações regulamentares adicionais, consulte “Avisos regulamentares” no apêndice do Manual do utilizador online. As secções específicas de cada agência reguladora fornecem informações de segurança de produtos ou de EMC/EMI específicas de cada país.

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Dell C840 manual Avisos regulamentares

C840 specifications

The Dell C840, released in the early 2000s, was a powerful mobile workstation designed to meet the needs of professionals who demanded high performance in a portable format. As part of Dell's Precision series, the C840 was well-regarded for its robust build quality, advanced features, and capability to handle intensive computing tasks.

One of the standout features of the Dell C840 was its Intel Pentium 4 processor, which offered impressive processing power at the time. Users could opt between different configurations, some even including the Intel Pentium 4 Extreme Edition for those seeking maximum performance. The system was designed to handle demanding applications such as CAD, 3D modeling, and other graphics-intensive programs, making it a favorite among architects, engineers, and graphic designers.

The C840 also featured a vibrant 15-inch display, with options for a high-resolution screen that provided sharp visuals and ample screen real estate for multitasking. The display's quality was complemented by NVIDIA graphics options, including the Quadro4 700 Go graphics card, which was optimized for professional applications, ensuring smoother graphics rendering and improved performance in 3D applications.

In terms of memory, the Dell C840 supported a generous amount of RAM, with configurations allowing up to 2GB, which was substantial for its time. This memory capacity contributed to better multitasking capabilities and overall system performance, allowing users to run multiple applications simultaneously without noticeable slowdowns.

Connectivity was another strong point of the Dell C840. The laptop featured a variety of ports, including USB ports, parallel and serial ports, and an optional docking station, which enhanced its versatility for connecting to various peripherals. Wireless technology was also a part of the package, with the inclusion of Wi-Fi capabilities, making it easier for users to stay connected in different environments.

Durability and design were key aspects as well. The C840 featured a solid chassis designed to withstand the rigors of mobility, making it suitable for on-the-go professionals. Its keyboard was designed for comfort and responsiveness, a critical feature for users who spent long hours typing.

In summary, the Dell C840 was a notable mobile workstation that combined power, performance, and portability. With its advanced Intel processors, high-quality display, robust graphics options, ample memory, and strong connectivity features, it catered to professionals looking for a reliable and efficient tool to handle their demanding workloads. Though technology has evolved significantly since its release, the Dell C840 remains a milestone in the history of mobile computing for professionals.