Key Digital KD-MSW4X2 Terminology, Matrix Switching, Distribution Amplifier Application

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KD-MSW4x2 Operating Instructions

Terminology

A/V	Audio/Video	Used in reference to the audio and video signals typically
		associated with a source device or display
B	Blue	The "blue" video channel
DVR	Digital Video Recorder	For example, a TiVo box
G	Green	The green video channel
H	Horizontal	Horizontal video synchronizing signal
IR	Infrared	IR, like the Infrared remote control. Simply point the front of an IR
		remote control unit towards the IR sensor on the product to be
		controlled.
L	Left	The Left channel of an analog stereo pair, Left and Right

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KD-MSW4x2 Operating Instructions

Matrix Switching

The KD-MSW4x2 is a Matrix Switcher that accepts up to four inputs from source devices, and can drive up to two displays.

A “Matrix Switcher” allows the user to select any input source device, and have it available on any desired output (typically a display). For example, the user may choose to view a DVD player on the display that is connected to Output 1, and view the satellite box on the display that is connected to Output 2. A true matrix switcher, the KD-MSW4x2 provides the user with two degrees of freedom:

›The ability to select any particular input source device, namely the source devices connected to Input 1, 2, 3, or 4

›These input devices can be chosen separately for Output 1 and Output 2

LED		LEDs (light-emitting diodes) are like small light bulbs that light up
		to indicate a selection, and are used as status indicators.
ms	Milliseconds	Unit of time, in seconds/100; for example, the factory default for
		Fade-to-Black video muting is 240 ms, which is equal to 240 x
		10-3 (0.24) seconds
PCM,	Pulse Code Modulation	PCM is a sampling technique for digitizing analog signals,
digital		especially audio signals. Used in this Operating Manual to refer to

A "4x2" Matrix Switching Example:

Select Video Source #3 to Display 1

Select Source #1 to Display 2

Distribution Amplifier Application

Video Source	Display 1	Display 2
1 - Satellite STB

2 - DVR

3 - DVD Player

4 - Cable STB

PCM		digital audio.
R	Right	Audio: The Right channel of an analog stereo pair, Left and Right

If desired, the unit also acts as a distribution amplifier, simultaneously routing any single input to both outputs.

	Red	Video: The "red" video channel
RCA jack		An RCA jack or what was called a “phono plug” is an industry
		standard audio connector used for the audio inputs and outputs
		of the KD-MSW4x2. The black connector jack [ “PCM”] is used
		for the digital audio formats. Analog stereo audio uses both jacks,
		where white = the left channel [“L”], and red = the right channel
		[“R”]. The video inputs and outputs also use RCA connectors.
RGBHV	"VGA"-like video	Video signal wiring format using red (R), green (G), and blue (B)
		signals. The horizontal (H) and vertical (V) signals are used for
		video synchronization. Sometimes the sync signals are embedded
		in the green (G) channel, which frees-up the H&V connectors.
STB	Set Top Box	For example, a Cable STB or Satellite STB
V	Vertical	Vertical video synchronizing signal
VAC	Volts, AC	Specifies the AC line voltage, such as nominally 120 volts in the US
YPbPr	Component Video	Video signal wiring format using “luminance” (Y) and two color
		signals (Pb and Pr). Typically the horizontal and vertical video
		synchronizing signals are embedded in the Y channel.

Using a Matrix Switcher as a Distribution Amplifier Example:

Select Video Source #4 to Display 1 Select Video Source #4 to Display 2

Video Source		Display 1	Display 2
1 - Satellite STB
2	- DVR
3	- DVD Player
4	- Cable STB