As a Marine serving in the Korean and Vietnam wars, John Hopkins used line-of-sight and various portable radios, or PRCs, to communicate in the field. The “AN” in the AN/PRC-6 meant that it was a ...

In this section we will discuss some fundamental digital building blocks for power management. We will quickly review the main properties of the elementary components, the logic gates, so that we can ...

One of the major difficulties in studying electricity, especially when compared to many other physical phenomena, is that it cannot be observed directly by human senses. We can manipulate it to ...

Digital-based communications systems for emergency responders offer significant advances over traditional analog voice radios, including better security, interoperability enhancements and the ability ...