GLENAIR
A “link budget” is an accounting of all of the power gains and losses that a fast communication signal experiences—
node-to-node, from a transmitter, through a cable to the receiver.
DISTANCE: As a preamble, lets take a look at just one of the key parameters mentioned, that of distance. The first consideration in looking at a transmission link is the distance to be traveled (and number of breakpoints). Obviously, the further a signal must travel, the more focus must be applied in budgeting for signal degradation from cable loss. In a typical local area computer network application, a node-to-node copper connection will rarely exceed the maximum allowed by conventional Ethernet standards (approximately 100 meters). This maximal distance is typically adequate to wire up computerized devices within a building—or an aircraft, spaceship, submarine, or other defined space. Beyond this distance, in-line electronics such as repeaters and re- drivers (supplied by Glenair for all protocols including USB, DVI, and HDMI) are required. Conversion to optical fiber is also a reliable option.
QwikConnect • July 2020
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