In broad terms, TVRO is the older kind and DBS is the newer kind. TVRO picks up signal with a ten-foot dish in your yard, as opposed to DBS, which uses a much smaller dish on your roof. DBS is able to save space on dish size by using 100% digital, high-frequency broadcasts (as opposed to low-frequency, digital/analog TVRO broadcasts). Satellite TV is sandwiched between cell phone signal and radar systems within 3–30 GHz.