WHAT DOES LOW-NOISE AMPLIFIER MEAN?

One of the most plentiful and minimum high priced on the coaxial switches are mechanical, operated by hand with a knob. The most elementary 1 could be the A/B switch, with one enter and two outputs, A and B.The input and output terminals in the switch are gold plaited. The connectors may also be unique and are with the UHF woman SO-239 connectors.W