q antennaq channelq demodulatorq factorq meter quality factor meterq multiplierq q factor quality factorq signalq spoilingq switchingqamqfpqpskqrpqskqsl cardquadquad flatpackquadrantquadrant electrometerquadraphonic sound system four channel sound systemquadratic formquadraturequadrature amolitude modulationquadrature amplifierquadrature amplitude modulationquadrature carrierquadrature componentquadrature detectorquadrature filterquadrature modulationquadrature multiplexingquadrature ohase shift keyingquadrature oscillatorquadrature phase quadraturequadrature phase subcarrier signalquadricorrelatorquadrupole amplifierquadrupole diversityquadrupole momentquaity factorqualityquality controlquality of servicdquanchingquantityquantity controlquantity of electricityquantity of radiationquantization
