| Kilohertz: |
One thousand cycles per second. |
| Level Diagram: |
A graphich diagram indicating the signal level at any point in a system. |
| Line Amplifier: |
An amplifier in a transmission line that boosts the strength of a signal. |
| Line Attentuator: |
A device inserted in-line of the coaxial cable to decrease the level of the signal. Attentuators come in values of 1,2,3,5,7,10,15,20,25, and 30dB. |
| Line Extender: |
Another term for Line Amplifier. |
| Line Splitter: |
A device which divides the signal symmetrically from a single cable into two or more cables of similar impedance. An active or passive device that divides a signal into two or more signals containing all the original information. A passive splitter feeds an attenuated version of the input signal to the output ports. An active splitter amplifies the input signal to overcome the splitter loss. |
| Lo-Band: |
The low VHF television channels. |
| Low Frequency Distortion: |
Distortion effects which occur at low frequency. In television, generally considered as any frequency below the 15.75 Khz line frequency (NTSC). |
| Low Pass Filter: |
An electronic circuit designed to pass all frequencies below a specified frequency while attenuating signals with frequencies above the rated value. |
| Master Antenna Television System (MATV): |
A combination of components providing multiple television receiver operation from one antenna or group of antennas. Broadcast receiving stations that use one or more high-quality centrally located UHF and/or VHF antennas which relay their signals to many televisions in a local apartment/condo or group-housing complex. |
| Matching Transformer: |
Same as balun, generally associated with a matching device for transforming a 75 ohm coaxial cable impedance for connection to the TV set's 300 ohm input terminal. |
| MegaHertz (MHz): |
One million cycles per second. |
| Microwave: |
The frequency range from approximately 1 to 30 GHz and above. |
| Midband: |
Cable television channels A through 1 that lie between VHS channels 6 and 7. |
| Mixer: |
A device used to combine signals together. |
| Modulation: |
The information portion of an R.F. transmission waveform. The carrier wave is altered by the signal wave or modulated wave to produce a combined waveform, ready for transmission called an R.F. waveform or modulated signal. A process in which a message is added or encoded onto a carrier wave. Among other methods, this can be accomplished by frequency or amplitude modulation, known as AM or FM, respectively. |
| Modulator: |
A means of getting baseband frequency into an R.F. frequency that can be received by a standard TV tuner. This is accomplished by mixing the 6 Mhz (NTSC) signal with the proper carrier frequency to give a standard channel output frequency. |
| Monochrome: |
A black and white television picture. Multiplexing : The simultaneous transmission of two or more signals over a single communication channel. |
| Multiswitch: |
Combine a dual LNB output from a dish, and in some cases combine RF signals, and send signals out to multiple satellite receivers. |
| Noise: |
An unwanted signal which interferes with reception of the desired information. Noise is often expressed in degreees Kelvin or in decibels. |
