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KD-MSW4x2 Operating Instructions

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KD-MSW4x2 Operating Instructions

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Connecting the Video and Audio Inputs and Outputs

Decide on a safe location to place or mount the KD-MSW4x2. Provide enough space for sufficient 

airflow and ventilation, especially if the unit is left “On” most of the time.  

Connecting A/V Equipment

Connecting A/V equipment to the KD-MSW4x2 HDTV Matrix Switcher is straightforward and easily 

accomplished via the ergonomic rear panel connector array.  Because not all consumer equipment 

marketed today uses RCA connector interfaces, it may be necessary to employ adapter plugs 

and/or cable assemblies to interface these various devices to the unit.

The video signal format must be considered when making connections to the KD-MSW4x2 unit.  

Simply match the A/V device’s output (namely YPbPr “Component” or RGBHV “VGA” video) to a 

similar video signal output configuration on the KD-MSW4x2.  S-Video and/or composite video 

may also be interfaced with the unit, using appropriate adapters available separately.

The same consideration applies to the audio interfaces.  Both analog and digital audio output 

options are provided on the KD-MSW4x2.  Use the appropriate format, such as analog audio when 

connecting directly to the audio inputs of a video monitor; or digital audio, when connecting instead 

to an A/V receiver having coaxial digital (PCM) interfaces for decoding surround sound signals.

Do not connect the external supply (provided) to the back 
of the KD-MSW4x2 unit until ALL of your video and audio 
connections are completed.

Test for proper operation of the unit, interconnections, and cables before final 
installation of cables behind walls or ceilings. The output stage of the KD-MSW4x2 
is capable of driving high-quality, equal-length video cables up to 300’ or more.

CAUTION:  For proper operation of the high quality electrical circuits in 
the KD-MSW4x2 unit, do NOT "daisy chain" inputs:

Each input of the KD-MSW4x2 has its own 75 

Ω

 termination

Do NOT feel a source to multiple KD-MSW4x2 inputs without 
proper distribution equipment

CAUTION:  The output stage of the KD-MSW4x2 can drive high-quality 
length video cables up to 300' or more. Be sure to use high-quality 
cables like those available through Key Digital

.  Always ensure cables 

for each output are equal in length for each video component.

CAUTION:  Connecting digital PCM audio signals directly to the analog 
audio input of a TV monitor, display, or other device can result in 
severe damage to its speakers.

The 4 Input Ports and the 2 Output Ports are Configured Identically

The Port configurations are the same for the 4 Input Ports and the 2 Output Ports. Each Port is 

comprised of six (6) color-coded RCA connectors:

Connect up to four video and audio sources to the RCA jack Input Ports of the KD-MSW4x2.  

Digital PCM audio is available with either YPbPr or RGBHV video
Analog stereo audio is available with YPbPr video but not RGBHV video, unless the sync is on 

green (G)

Connect up to two displays to the RCA jack Output Ports of the KD-MSW4x2.  The audio 

outputs from the product can be connected to the audio inputs of the display, or separate 

surround sound or other audio systems.  

Video

Audio

Component Video Applications

Inputs and Outputs

RGBHV Video Applications

Inputs and Outputs

Pr

Y

Pb

Left (L)

Right (R) Digital

PCM

R

G

B

H

V

Digital

PCM

Component Video

RGBHV Video

Analog

Stereo

Audio

Digital

Audio

Digital

Audio

If video sync is

on Green (G), then

Analog Stereo Audio

is also supported

here in place of H&V 

Note:  The left and right analog stereo audio interfaces also double as the horizontal and vertical sync signals 
(respectively) for the RGB video interface.

MSW4x2_Manual.indd   16-17

8/23/06   4:07:20 PM

Summary of Contents for KD-MSW4X2

Page 1: ...BoySeriesKD MSW4x2byKeyDigital isananalogHDTV4 Inputto2 Output matrix switcher and distribution amplifier For each of the two displays connected to its output any of up to four source inputs can be se...

Page 2: ...omputers PCs The KD MSW4x2 handles all HD and SD resolutions and is compatible with all standard analog video signal formats including 1080p 1080i 720p 576p 576i 540p 480p 480i 50 Hz or 60 Hz refresh...

Page 3: ...deo B label is for the blue channel for RGBHV video White Connector L H L label is for the left analog stereo audio channel H label is for the horizontal sync for RGBHV video Red Connector R V Right a...

Page 4: ...of Key Digital switchers called Fade to Black and Video Mute Both of these features let the user switch like a pro like in a live studio Fade to Black The Fade to Black feature allows for switching b...

Page 5: ...resolutions 50 and 60 Hz including 1080p 60 with no degradation in video or audio signal quality Since the KD MSW4x2 performs no video or audio processing the video and audio signals remain pure and u...

Page 6: ...xample the factory default for Fade to Black video muting is 240 ms which is equal to 240 x 10 3 0 24 seconds PCM digital PCM Pulse Code Modulation PCM is a sampling technique for digitizing analog si...

Page 7: ...tput displays and or audio systems Use only the external power supply provided with the KD MSW4x2 unit or you VOID the Key Digital Warranty and may potentially damage to the unit and associated equipm...

Page 8: ...e switched and distributed to both outputs Professional Switching Features Fade to Black allows for switching between input output combinations without the usual visual signal noise glitches and sync...

Page 9: ...tor IR Extender sensor Wired IR serial port External power supply connector Examine the Front and Rear Panels Become familiar with the front and rear panels of the KD MSW4x2 unit Front Panel The front...

Page 10: ...ty equal length video cables up to 300 or more CAUTION For proper operation of the high quality electrical circuits in the KD MSW4x2 unit do NOT daisy chain inputs Each input of the KD MSW4x2 has its...

Page 11: ...stereo audio cables from the set top receiver to the white and red connectors of the same Input Port of the KD MSW4x2 unit If a digital audio coaxial output is available on the set top receiver it can...

Page 12: ...onnect the white Y conductor to the green RCA connector of the selected Input Port and connect the yellow C conductor to either the blue or red RCA connector in the same input field Connect the white...

Page 13: ...R remote control IR Extender A rear panel IR sensor is provided ideal to use with an IR Extender like one provided by Xantech The rear panel IR sensor also supports the IR remote control provided with...

Page 14: ...at Boy expansions have multiple KD MSW4x2 units pre wired from the factory Each unit in the expansion is individually addressable Configuring a particular unit with the desired input and output combin...

Page 15: ...r three 3 seconds to confirm the selection Press two digits on the IR remote control to perform the desired input and output switching function First enter the desired video audio output 1 or 2 Simply...

Page 16: ...RS 232 see the RS 232 Command List Activate Video Audio Mute R1 output 1 2 up arrow Deactivate Video Audio Mute R1 output 1 2 down arrow KD MSW4x2 IR Remote Control Function Table In addition to some...

Page 17: ...t to 2 Output matrix switcher and distribution amplifier Matrix Switching Supports Video and Audio Four 4 Input Ports and two 2 Output Ports provided Matrix switch one of up to four inputs to either o...

Page 18: ...atible Video Signals Compatible with all standard analog video signal formats that use 50 Hz or 60 Hz refresh rates including 1080p 1080i 720p 576p 576i 540p 480p 480i Video Characteristics Output sta...

Page 19: ...ase contact us at either Phone 1 914 667 9700 ext 223 E mail customersupport keydigital com Warranty All Key Digital products are built to high manufacturing standards and should provide years of trou...

Page 20: ...KD MSW4x2 Operating Instructions Page 36 KD MSW4x2 Operating Instructions Page 37 Installation Notes Installation Notes MSW4x2_Manual indd 36 37 8 23 06 4 07 55 PM...

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