The Illustrated Dictionary of Electronics - Loscha

cavity magnetron • cell constant 105cavity magnetron A magnetron whose anode is aseries of resonant cavities.cavity oscillator An oscillator with a cavity-tunedcircuit.cavity radiation Energy radiated from a tiny holein an otherwise sealed chamber. The radiationoccurs at all electromagnetic wavelengths; thegreater the temperature within the chamber, thegreater the frequency at which the radiation hasits maximum amplitude.cavity resonance The phenomenon whereby ahollow cavity resonates; specifically, resonance insmall metal cavities at microwave frequencies.cavity resonator See RESONANT CAVITY.cavity wavemeter An absorption wavemeter whoseadjustable element is a tunable resonant cavityinto which radio-frequency (RF) energy is injectedthrough a waveguide or coaxial cable. Such an instrumentis useful at microwave frequencies.CB Abbreviation of CITIZENS BAND.Cb Symbol for COLUMBIUM.C B Symbol for BASE CAPACITANCE of a transistor.C band The band of radio frequencies between 3.9and 6.2 GHz.C C Symbol for collector capacitance of a transistor.cc 1. Alternative abbreviation of cubic centimeter.The International Organization for Standardizationrecommends cm 3 . 2. Abbreviation ofCOTTON-COVERED.CCA Abbreviation of CURRENT-CONTROLLEDAMPLIFIER.CCD Abbreviation of CHARGE-COUPLED DEVICE.CCIS Abbreviation of COMMON-CHANNEL INTER-FACE SIGNALING.CCIR Abbreviation of Comite Consultatif Internationaldes Radiocommunications (International RadioConsultative Committee).CCIT Abbreviation of Comite Consultatif InternationalTelegrafique (International Telegraph ConsultativeCommittee).CCITT Abbreviation of Comite Consultatif InternationalTelegrafique et Telephonique (InternationalTelegraph and Telephone Consultative Committee).CCS 1. Abbreviation of CONTINUOUS COMMER-CIAL SERVICE. 2. Abbreviation of commonchannelsignaling.CCTV Abbreviation of CLOSED-CIRCUIT TELEVI-SION.CCTV monitor A video monitor that receives a signalfrom a CCTV transmitter.CCTV signal The picture signal in a CCTV system.It can be either a modulated radio-frequency signalor a composite video signal.ccw Abbreviation of COUNTERCLOCKWISE.CD Abbreviation of COMPACT DISK.Cd Symbol for CADMIUM.cd Abbreviation of CANDELA.CD-4 A method of obtaining quadraphonic reproductionon a phonograph disk using modulatedcarriers with frequencies above the human hearingrange.CDI Abbreviation of CAPACITOR-DISCHARGE IG-NITION.C display A radar display showing the target as adot whose coordinates represent the bearing (horizontal)and angle of elevation (vertical). CompareA DISPLAY, J DISPLAY, and K DISPLAY.cd/m 2 Candelas per square meter, the SI unit ofluminance.CD-ROM Abbreviation of COMPACT-DISK READ-ONLY MEMORY.Ce Symbol for CERIUM.C e Symbol for EMITTER CAPACITANCE of a transistor.ceiling 1. The maximum possible power outputfrom a transmitter. 2. The maximum possiblecurrent or voltage that a circuit can deliver. 3. Inaviation, the level of the cloud base.ceilometer An instrument for measuring ceiling(cloud height).cel In animated graphics, an individual image orframe.cell 1. A single (basic) unit for producing dc electricityby electrochemical or photovoltaic action,as in a battery or a solar panel. Also see PRIMARYCELL, STANDARD CELL, STORAGE CELL. 2. Anaddressable, one-word-capacity storage elementin a computer memory. 3. The geographic regioncovered by a specified repeater in a cellular communicationsnetwork. See CELLULAR COMMU-NICATIONS. 4. An electrostatic charge dipole inthe atmosphere, usually occurring in or nearthunderstorms. 5. A thunderstorm.cell constant The surface area of the electrodes ina cell divided by the distance between them. Thebasic linear units must be the same: for example,square centimeters for surface area and centimetersfor distance.