Frequency (audio) - Frequency, in music, refers to the pitch of a sound. The frequency of a sound is measured in cycles per second. One cycle is one complete audio waveform. Bass frequencies have a lower number of waveforms per second. Treble frequencies have a very high number of waveforms per second.
Spectrum Analyzer - A portion of the display panel of a receiver or shelf system reserved for viewing the relative levels of several bands of audio frequencies.
HDTV (High-Definition Television) - A television system that incorporates 1000 or more horizontal lines of resolution (twice current standards) along with a wider aspect ratio and digital quality audio.
Interactive Television - TV programming with interactive content and enhancements, blending traditional TV viewing with the interactivity of a personal computer.
A/V Input Jacks - Audio/video input jacks allow you to connect external sources to your TV quickly and easily. These jacks connect your sources directly to audio and video circuits of the TV set, bypassing the tuner for optimum picture and sound reproduction. The video input is a composite video input.
A/V Integrated Amplifier - An audio/video receiver that doesn't have a tuner. This type of receiver is an option when radio access isn't desired.
Cropping factor - Many digital SLRs use an image sensor that is smaller than 35mm film. If you attach a lens to one of these cameras, its 35mm equivalency will be multiplied by the cropping factor-a manufacturer's specification. For example, if your digital SLR has a cropping factor of 1.6x, then a 50mm lens mounted on your camera will have a 35mm equivalency of 80mm. That is, the 50mm lens will yield the same field of view as an 80mm lens on a 35mm camera.
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