电信专业英英词典G-2（在线收听）

　　Ground - Connecting the Earth to electrical equipment with a conductor. This is done so current overloads (perhaps due to a lightning strike) can be safely diverted to the Earth.

　　Ground Fault Circuit Interrupter (GFCI or GFI) - This is a safety device, present in many household outlets, that will interrupt the current in an electrical circuit when the fault current goes over a certain value.

　　Ground Station - The satellite equipment located on the ground that controls the satellite and the information that is sent and received by the satellite.

　　G/T - A measure expressed in dB that is the ratio of the net gain (G) of the system and the noise temperature (T) of the system. Since you want to reduce noise temperature, a better system has a higher G/T.

　　Guard Band - This is a narrow piece of bandwidth that acts as a buffer between channel frequency bandwidths, with the intent of reducing interference. (See Guard Channel.)

　　Guard Channel - The channels that are transmitted together by satellites are kept apart by buffer zones called guard channels. A guard channel is several MHz wide and reduces the risk of channels interfering with each other. (See Guard Band.)