high-frequency equipment
21High-definition television — Logo High definition television (HDTV) is video that has resolution substantially higher than that of traditional television systems (standard definition television). HDTV has one or two million pixels per frame, roughly five times that of SD… …
22High speed photography — [ Eadweard Muybridge, first published in 1887.] High Speed Photography is the science of taking pictures of very fast phenomena. In 1948, the Society of Motion Picture and Television Engineers (SMPTE) defined high speed photography as any set of… …
23High-Definition Multimedia Interface — Infobox connector name=High Definition Multimedia Interface type=Digital audio/video connector logo= caption=HDMI cable and HDMI official logo designer=HDMI Founders design date=December 2002 manufacturer=HDMI Adopters production date=2003… …
24equipment — Synonyms and related words: Lecher wires, RC oscillator, VOM, VTVM, ability, accessories, accouterment, accouterments, adaptation, adjustment, ammeter, anemometer, anemoscope, apparatus, appliances, appointments, appurtenances, armament,… …
25Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
26Utility frequency — The waveform of 230 volt, 50 Hz compared with 110 V, 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency at which alternating current (ac, also AC) is transmitted from a… …
27Dual-tone multi-frequency signaling — One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… …
28Intermediate frequency — In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier… …
29Spider-Man's powers and equipment — The fateful spider bite that gave Peter Parker his powers. Amazing Fantasy #15, art by Steve Ditko. Spider Man s powers, abilities, and equipment are used by Marvel Comics superhero Spider Man in tandem to combat his many foes. He receives most… …
30Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …
