Word: megahertz
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
...communications system. Known as a signal processor, it accepted the astronauts' voices as well as 900 other signals-telemetric data on heartbeats, for example, pressure readings in the cabin, data from the computers-and imposed them on a single "carrier" frequency of 2,282.5 megahertz. An amplifier increased the signal's power from half a watt to 20 watts, the strength of a small ham-radio transmitter. The 26-in. dish antenna, perched atop the LM, then beamed the signal to earth...
...unit, which shares its channels with car phones, operates in the 150-megahertz band. It has an output of 25 watts, which makes it normally serviceable within 30 miles of a mobile operator. No matter how distressing the conversation turns out to be, profanity is not advisable. The FCC prohibits swearing, and mobile operators are quick to interrupt when the language turns blue...
...activity among U.S. scientists. Focusing Cornell University's giant radio telescope near Arecibo, Puerto Rico, on the one pulsar whose position was given by the British, Astronomer Frank Drake confirmed the rapid, regular signal and discovered that it was ten times as powerful at 111 MH (for megahertz: 1,000,000 cycles per second) than at any other frequency. "This has been the biggest bombshell that I can remember in radio astronomy," he says. Caltech Astronomer Maarten Schmidt, who discovered the strange nature of quasars, calls the finding "fantastic, incredible...