There are two main types of heat pumps: geothermal heat pumps and air-source heat pumps. A geothermal heat pump draws the heat from the ground, while the air-source type pulls the heat from the air outside.
RF cables are a type of coaxial cable that is used to send radio frequency signals. RF cables are often used to send video information to a TV set. Identification. RF cables can be identified by the connectors at the end of the cables. RF cable connectors have a single pin that plugs into the RF input on a TV or other device and a threaded piece of metal around the connector that can be used to secure the cable to the RF input port. RF cables are commonly used in cable TV and Internet connections.
Cable Signal Leakage. Cable television systems use radio frequency signals transmitted over cables to provide television and data services to customers. Normally, these RF signals do not cause interference when cable systems comply with FCC rules for limiting interference. Occasionally, however, cable television system signals can âleak.â Cable signal leaks occur when the RF signals transmitted within a cable system are not properly contained within the cable plant.