IDK MSD-402 User manual

Digital Multi Switcher
MSD-402
<User’s Guide>
Ver.1.4.0
●Thank you for choosing our Digital Multi Switcher.
●To ensure the best performance of this product, please read this User’s Guide fully and carefully before
using it and keep this manual beside the product.
IDK Corporation

MSD-402 User’s Guide
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Trademarks
●Blu-ray Disc and Blu-ray are trademarks of Blu-ray Disc Association.
●The terms HDMI and HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or
registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.
●PJLink is a trademark in Japan, the United States, and other countries/regions.
●HDBaseT™ and the HDBaseT Alliance Logo are trademarks of the HDBaseT Alliance.
●Microsoft, Windows, Internet Explorer are either registered trademarks or trademarks of the Microsoft
Corporation in the United States and other countries.
●ETHERNET is registered trademark of Fuji Xerox Corporation.
●Mozilla, Firefox and its logo are trademarks or registered trademarks of the Mozilla Foundation in the
United States and other countries.
●Google Chrome is trademark or registered trademark of Google Inc.
●Javascript® is trademark or registered trademark of the Oracle Corporation and its related companies in
the United States and other countries.
●Oracle and Java are registered trademarks of the Oracle Corporation and its related companies in the
United States and other countries.
●All other company and product names mentioned in this manual are either registered trademarks or
trademarks of their respective owners. In this manual, the “®” or “™” marks may not be specified.

MSD-402 User’s Guide
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Before reading this manual
●All rights reserved.
●Some of the contents in this user’s guide such as product appearance in diagrams, menu operations,
communication commands, and so on may differ from the MSD depending on the version.
●This Users guide is subject to change without notice. You can download the latest version from IDK’s
website at:
http://www.idkav.com
The reference manual for the MSD consists of the two following volumes:
■User’s guide (this document):
Provides explanations and procedures for operations, installation, connections among devices, I/O
adjustment and settings.
■Command guide: Please download the command guide from the website above.
Provided explanations and procedures for external control using RS-232C and LAN communications.
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be required to correct the interference
at their own expense.
CE MARKING
This equipment complies with the essential requirements of the relevant European health, safety and
environmental protection legislation.
WEEE MARKING
Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC
(This directive is only valid in the EU.)
This equipment complies with the WEEE Directive (2002/96/EC) marking requirement.
The left marking indicates that you must not discard this electrical/electronic equipment in
domestic household waste.

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Safety Instructions
Read and understand all safety and operating instructions before using this product. Follow all instructions
and cautions as detailed in this document.
Enforcement Symbol
Description
Indicates the presence of a hazard that may result in death or serious
personal injury if the warning is ignored or the product is handled
incorrectly.
Indicates the presence of a hazard that may cause minor personal
injury or property damage if the caution is ignored or the product is
handled incorrectly.
Symbol
Description
Example
Caution
This symbol is intended to alert the user. (Warning and caution)
Electrical
Hazard
Prohibited
This symbol is intended to prohibit the user from specified actions.
Do not
disassemble
Instruction
This symbol is intended to instruct the user.
Unplug
Caution
Warning

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Prohibited
Do not place the product in any unstable place.
Install the product in a horizontal and stable place. Otherwise, it may fall/turn over and lead to injury.
Do not place the product in any environment with vibration.
Otherwise, it may move/fall and lead to injury.
Keep out any foreign objects.
In order to avoid fire or electric shock, do not allow foreign objects, such as metal and paper, to enter the product
from the vent holes.
For power cable/ plug:
•Do not scratch, heat, or modify, including lengthening them.
•Do not pull, place heavy objects on them, or pinch them.
•Do not bend, twist, or tie them together forcefully.
Misuse of the power cable and plug may cause fire or electric shock. If power cables/plugs become damaged,
contact your IDK representative.
Do not
disassemble
Do not repair, modify or disassemble.
Since the product includes circuitry that uses potentially lethal, high voltage levels, disassembly by unauthorized
personnel may lead to the risk of fire or electric shock. For internal inspection or repair, contact your IDK
representative.
Do not
touch
In the event of electrical storms, keep away from the main unit and cables such as
power cable and LAN cable.
Contact may cause electric shock
Instruction
For installation:
The product is intended to be installed by skilled technicians. For installation, please contact a system integrator or
IDK. Improper installation may lead to the risk of fire, electric shock, injury, or property damage.
Set the power plug in a convenient place to unplug easily.
Unobstructed access to the plug enables unplugging the product in case of any extraordinary failure, abnormal
situation or for easy disconnection during extended periods of non-use.
Insert the power plug into an appropriate outlet completely.
If the plug is partially inserted, arching may cause the connection to overheat, increasing the risk of electrical shock
or fire. Do not use a damaged plug or connect to a damaged outlet.
Clean the power plug regularly.
If the plug is covered in dust, it may increase the risk of firer.
Unplug
Unplug immediately if the product smokes, makes unusual noise, or produces a
burning odor.
If you continue to use the product under these conditions, it may cause electric shock or fire. After confirming that the
product stops smoking, contact your IDK representative.
Unplug immediately if the product falls and/or if the cabinet is damaged.
If you continue to use the product under these conditions, it may increase the risk of electrical shock or fire. For
maintenance and repair, contact your IDK representative.
Unplug immediately if water or other objects are directed inside.
If you continue to use the product under these conditions, it may increase the risk of electrical shock or fire. For
maintenance and repair, contact your IDK representative.
For connection
Instruction
Differences in ground potential among product population of interconnected products and other external devices
may increase the risk of electric shock to personnel or cause damage tothe devices or cabling infrastructure. When
using cables to connect devices, including connection of long-distance transmission cables, unplug the power
cables of all interconnected devices.
Power may be restored after all signal/control cables are connected to each device.
Warning

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For installation
For rack mount devices:
Instruction
Mount the product in a the rack meeting EIA standards, and maintain spaces above and
below for air circulation. For your safety, attach an L-shaped bracket in addition to the
panel mount bracket kit to improve mechanical stability.
For devices with rubber feet:
Instruction
Never insert screws without the rubber feet into the threaded holes on the bottom of the
product. Doing so may lead to damage when the screws contact electrical circuitry or
components inside the product.
Reinstall the originally supplied rubber feet using only the originally supplied screws.
Altitude:
Instruction
Do not place the product at elevations of 2,000 meters (6562 feet) or higher above sea
level. Failure to do so may shorten the life of the internal parts and result in malfunctions.
Prohibition
Do not place the product in any place where it will be subjected to high
temperatures.
If the product is subjected to direct sunlight or high temperatures while under operation, it may affect the
product’s performance and reliability and may increase the risk of fire.
Do not place the product in humid, oil smoke filled, or dusty place.
If the product is placed near humidifiers or in a dusty area, it may increase the risk of fire or electric shock.
Do not block the vent holes.
If ventilation slots are blocked, it may cause the product to overheat, affecting performance and reliability and
may increase the risk of fire.
Do not place or stack heavy objects on the product.
Failure to observe this precaution may result in damage to the product and other property and may lead to the
risk of personal injury.
Do not exceed ratings of outlet and wiring devices.
Exceeding the rating of an outlet may increase the risk of fire and electric shock.
Use only the supplied AC adapter and power cable.
Do not use the supplied AC adapter and power cable with other products.
If non-compliant adapter or power cables are used, it may increase the risk of fire or electrical shock.
No wet hands
Do not plug or unplug with wet hands.
Failure to observe this precaution may increase the risk of electrical shock.
Instruction
Use and store the product within the specified temperature/humidity range.
If the product is used outside the specified range for temperature and humidity continuously, it may increase the
risk of fire or electric shock.
Turn off devices while making connections to another device.
Failure to observe this precaution may increase the risk of fire or electric shock.
Unplug
If the product won’t be used for an extended period of time, unplug it.
Failure to observe this precaution may increase the risk of fire.
Unplug the product before cleaning.
To prevent electric shock.
Caution

MSD-402 User’s Guide
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Table of Contents
1Included items.....................................................................................................................................10
2Product outline....................................................................................................................................11
3Features..............................................................................................................................................12
4Panels.................................................................................................................................................13
4.1 Front panel.....................................................................................................................................13
4.2 Rear panel......................................................................................................................................14
5Example connection............................................................................................................................15
6Precautions.........................................................................................................................................16
6.1 Installing rubber feet.......................................................................................................................16
6.2 Installation......................................................................................................................................16
6.3 Cabling...........................................................................................................................................17
6.3.1 Cables ....................................................................................................................................17
6.3.2 Twisted pair cable...................................................................................................................18
6.3.3 Connecting audio cables.........................................................................................................19
6.3.4 Connecting RS-232C cable.....................................................................................................19
6.3.5 DIN plug AC adapter...............................................................................................................20
7Basic operation....................................................................................................................................22
7.1 Required time.................................................................................................................................22
7.2 Switching input channel..................................................................................................................22
7.2.1 Selecting input channel...........................................................................................................22
7.2.2 Turning OFF input signal.........................................................................................................22
7.3 Setting and canceling key lock........................................................................................................23
7.4 Remote input channel switching function of HDC-TH200 inputs......................................................23
7.5 Initialization ....................................................................................................................................24
7.6 PinP (Picuture in Picuture)..............................................................................................................27
7.7 WEB menu operation......................................................................................................................27
7.7.1 Control from WEB browser......................................................................................................27
7.7.2 WEB menu..............................................................................................................................28
8Menu...................................................................................................................................................29
8.1 WEB menu list................................................................................................................................29
8.2 Input Signal Automatic Detection....................................................................................................31
8.3 Crosspoint operation (WEB menu)..................................................................................................33
8.3.1 Selecting input channel (WEB menu) ......................................................................................34
8.3.2 PinP output.............................................................................................................................34
8.3.3 Remote input channel switching of HDC-TH200 inputs............................................................35
8.3.4 Editing channel name..............................................................................................................36
8.3.5 Setting and canceling key lock (WEB menu)............................................................................37
8.4 Output timing (WEB menu).............................................................................................................38
8.4.1 Output resolution.....................................................................................................................40
8.4.2 Aspect ratio for sink device......................................................................................................41
8.4.3 Aspect ratio.............................................................................................................................41
8.4.4 Aspect ratio control .................................................................................................................42
8.4.5 Overscan ................................................................................................................................42
8.4.6 Display position.......................................................................................................................43
8.4.7 Display size.............................................................................................................................43
8.4.8 Masking ..................................................................................................................................44
8.4.9 Automatic sizing......................................................................................................................46

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8.4.10 Background color....................................................................................................................46
8.4.11 Test pattern.............................................................................................................................46
8.5 Quality settings (WEB menu)..........................................................................................................48
8.5.1 Sharpness...............................................................................................................................50
8.5.2 Brightness...............................................................................................................................50
8.5.3 Contrast..................................................................................................................................50
8.5.4 HUE........................................................................................................................................50
8.5.5 Saturation ...............................................................................................................................51
8.5.6 Black level...............................................................................................................................51
8.5.7 Gamma...................................................................................................................................51
8.5.8 Default color............................................................................................................................51
8.6 Input settings (WEB menu).............................................................................................................52
8.6.1 No-signal input monitoring.......................................................................................................53
8.6.2 Setting HDCP input.................................................................................................................53
8.6.3 Input equalizer ........................................................................................................................54
8.6.4 Automatic detection of input video interruption.........................................................................54
8.6.5 Fixing setting for each input.....................................................................................................55
8.7 Input timing (WEB menu)................................................................................................................56
8.7.1 The total number of horizontal dots..........................................................................................57
8.7.2 Start position...........................................................................................................................57
8.7.3 Active area..............................................................................................................................58
8.7.4 Input timing initialization ..........................................................................................................58
8.8 Output settings (WEB menu) ..........................................................................................................59
8.8.1 Output mode...........................................................................................................................61
8.8.2 Synchronous signal output with no input video.........................................................................61
8.8.3 Output video with no input video..............................................................................................62
8.8.4 Window transition effect ..........................................................................................................62
8.8.5 Window transition speed .........................................................................................................62
8.8.6 Wipe color...............................................................................................................................63
8.8.7 HDCP output...........................................................................................................................63
8.8.8 The number of HDCP retries...................................................................................................63
8.8.9 Deep Color..............................................................................................................................64
8.8.10 CEC connection......................................................................................................................64
8.8.11 HDCP re-authentication...........................................................................................................64
8.8.12 Priority of input channel automatic switchin..............................................................................65
8.8.13 Masking time after automatic switching of input channel..........................................................66
8.9 Audio settings (WEB menu)............................................................................................................67
8.9.1 Output level.............................................................................................................................69
8.9.2 Output mute............................................................................................................................69
8.9.3 Audio output connector............................................................................................................69
8.9.4 Multi channel audio output.......................................................................................................70
8.9.5 Test tone.................................................................................................................................70
8.9.6 Input level ...............................................................................................................................70
8.10 EDID: Extended Display Identification Data (WEB menu)................................................................71
8.10.1 EDID.......................................................................................................................................73
8.10.2 Resolution for PCs ..................................................................................................................74
8.10.3 Input resolution for AV devices................................................................................................75
8.10.4 Deep Color..............................................................................................................................76
8.10.5 Audio format............................................................................................................................76
8.10.6 Speaker configuration .............................................................................................................77

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8.10.7 Copying EDID.........................................................................................................................78
8.11 Communication settings (WEB menu).............................................................................................79
8.11.1 RS-232C communication.........................................................................................................83
8.11.2 IP address/subnet mask/gate way address..............................................................................83
8.11.3 TCP port number.....................................................................................................................84
8.11.4 MAC address..........................................................................................................................84
8.12 Preset memory (WEB menu)..........................................................................................................85
8.12.1 Loading cross point.................................................................................................................86
8.12.2 Saving cross point...................................................................................................................86
8.12.3 Editing cross point...................................................................................................................87
8.12.4 Loading all settings .................................................................................................................87
8.12.5 Saving all settings...................................................................................................................88
8.12.6 Copying output setting.............................................................................................................89
8.12.7 Startup setting.........................................................................................................................90
8.13 Setting bitmap (WEB menu)............................................................................................................91
8.13.1 Sending bitmap file..................................................................................................................93
8.13.2 Outputing bitmap image..........................................................................................................94
8.13.3 Background color....................................................................................................................94
8.13.4 Aspect ratio.............................................................................................................................95
8.13.5 Display position.......................................................................................................................96
8.13.6 Input channel assignment........................................................................................................97
8.13.7 Bitmap output at startup ..........................................................................................................97
8.13.8 Dividing memory area .............................................................................................................97
8.13.9 Input image capture...............................................................................................................100
8.14 Other settings (WEB menu)..........................................................................................................101
8.14.1 Startup setting for key lock ....................................................................................................102
8.14.2 Automatic reload time............................................................................................................102
8.14.3 Backup and restore all settings..............................................................................................102
8.14.4 Initialization (WEB menu)......................................................................................................103
8.14.5 Displaying version.................................................................................................................103
8.15 Displaying status (WEB menu) .....................................................................................................104
8.15.1 Input signal status.................................................................................................................105
8.15.2 Sink device status.................................................................................................................108
8.15.3 Displaying EDID of sink device..............................................................................................111
9Product specification .........................................................................................................................112
10 Troubleshooting.................................................................................................................................114

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1 Included items
Make sure all items below are included in the package.
If any items are missing or damaged, please contact IDK.
One (1) MSD-402 (main unit)
One (1) DIN plug AC adapter with
locking mechanism
Three (3) cable clamps
Two (2) terminal block (5-pin)
One (1) terminal block (3-pin)
Four (4) rubber feet
[Figure 1.1] Included items list

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2 Product outline
The IDK MSD-402 (hereafter referred to as “the MSD”) presentation switcher provides 4 inputs and 2 outputs
and has a built-in scan converter.
For video input, 2 HDBaseT and 2 HDMI/DVI are included. Input video signal is converted to HDMI/DVI or
HDBaseT signal and output at up to QWXGA or 1080p.
For audio input, 4 digital inputs are included. Selected audio signal is output to digital and analog audio. Audio
levels of each input and output can be set individually.
RS-232C and LAN are included as communication ports for external control communication and allows you to
set menus remotely.
HDBaseT input/output supports bidirectional LAN communication.
Analog video signal can be input by connecting HDMI/Analog HDBaseT transmitter HDC-TH200 (hereafter
referred to as “HDC-TH200”) to HDBaseT inputs of the MSD. The MSD can control and switch input channels
of the HDC-TH200 remotely through HDBaseT signal. Refer to IDK’s website for more information of the
HDC-TH200.
Video
Matrix
PinP
EDID emulation
Input EQ
MSD-402
RS-232C
LAN
CPU
Transmitter
EDID emulation
Receiver
Up to 330 ft. / 100 m
１
Port
１
Port
OUT1
Up to 16.4 ft. / 5 m
OUT2
OUT1
OUT2
Audio
Matrix
D/A Conversion
D/A Conversion
Analog audio
Stereo L / R
Balanced / Unbalanced
Analog audio
Stereo L / R
Balanced / Unbalanced
IN3 and IN4
Up to 330 ft. / 100 m
Up tp 99 ft. / 30 m
IN1 and IN2
Digital Video / Audio /
Communication
HDBaseT Inputs
2
Digital Video / Audio
HDMI DVI Inputs
2
Digital Video / Audio
HDMI DVI Output
1
Digital Video / Audio /
Communication
HDBaseT
Scan
Converter
4 channel PinP
Output
1
1
Output
1
Output
[Figure 2.1] Block diagram

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3 Features
■Video
・Up to QWXGA (RB)*1 or 1080p
・HDMI input cable EQ
INPUT: up to 33 ft. (10 m)
・Up to 328 ft. approx./100 m extension over a Cat6 cable
・Scan converter
・Picture in Picture (PinP)
・Aspect control
・Seamless switching*2
・Anti-snow
■Audio
・Digital audio de-embedded
・Audio level adjustment for each input/output.
■Control input
・RS-232C, LAN
■Control output
・Remote input channel switching for HDC-TH200 inputs through HDBaseT
■Others
・EDID emulation (with copy function)
・Web browser for all settings
・Automatic input channel switching
・Crosspoint memory
・Preset memory
・Last memory
・Connection reset
・Key lock
・AC adapter mechanical lock
*1 (RB) = Reduced Blanking
*2 A black frame is displayed at the time of switching

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4 Panels
4.1 Front panel
①② ③
[Figure 4.1] Front panel drawing
[Table 4.1] Front panel’s part name and description
#
Part name
Description
①POWER LED Shows power status of the MSD
ON: Power is supplied to the MSD
OFF: Power is not supplied to the MSD
②KEY LOCK LED Shows key lock status of the MSD
ON: Locked
OFF: Unlocked
【
See: 7.3 Setting and canceling key lock
】
③
Input channel selection key
Selects input channels
【See: 7.2 Switching input channelSwitching input channel】

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4.2 Rear panel
⑥⑩
③⑤ ⑦ ⑧ ⑪⑨
④
① ② ① ② ②⑥
③
[Figure 4.2] Rear panel drawing
[Table 4.2] Rear panel’s part name and description
# Part name Description
①HDMI input connector Input connectors for HDMI and DVI signal to connect to a source
devices, such as Blu-ray players.
②
HDMI cable fixing hole
Fixes HDMI cables by inserting cable clamps.
【
See: [Figure 6.1] Attaching a cable clamp
】
③HDBaseT input
connector Digital (video/audio) signal can be extended up to 100 m/328.08 ft. using an IDK’s HDC transmitter together.
【
See: 6.3.2 Twisted pair cable
】
④HDMI output connector Output connector for HDMI and DVI signal to connect to sink devices
such as LC monitors and projectors
⑤HDBaseT output
connector Digital (video/audio) signal can be extended up to 100 m/328.08 ft. using an IDK’s HDC receiver together.
【See: 6.3.2 Twisted pair cable】
⑥Audio output connector Analog output connectors of audio to connect to amplifier, speakers,
and mixers.
【
See: 6.3.3 Connecting audio cables
】
⑦
LAN port
For external control by communication commands or web browsers
⑧RS-232C port For external control by communication commands
【See: 6.3.4 Connecting RS-232C cable】
⑨Maintenance port Not used.
Keep this connector free
⑩
DC power connector
Connects attached AC adapter
【See: 6.3.5 DIN plug AC adapter】
⑪Frame ground Can be used to provide an electrical bond between the MSD and
surrounding products ground potential. M4 screws are used.

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5 Example connection
Laptop Blu-ray player
Speakers
Analog audio
Monitor
LAN
PC
Power amp.
Laptop
HDBaseT
Up to 328 ft. (100 m)
HDMI / DVI
HDBaseT
Up to 328 ft. (100 m)
HDBaseT
Up to 328 ft. (100 m)
HDC series
receiver
HDMI / DVI
Blu-ray player
HDMI / DVI
Up to 98 ft. (30 m)
HDMI / DVI
Up to 98 ft. (30 m) HDMI / DVI Up to 16 ft. (5 m)
Projector
Rx
RS-232C
LAN
Cat6 Rxfor HDMI
POWER LINK HDCP
STATUS
POWER LINK HDCP
POWER LINK HDCP
STATUS
FG DC5V 2A
HDC-RH100-C
INPUT
DON'T
CONNECT
LAN
HDBaseT
CAUTION
!
(MAX2M)
HDMI
OUTPUT
HDC series
transmitter
RS-232CLAN
Tx
Cat6 Txfor HDMI
POWER LINK HDCP
STATUS
POWER LINK HDCP
POWER LINK HDCP
STATUS
INPUT
(MAX2M)
OUTPUTFG DC5 V 2A
DON'T
CONNECT
LAN
HDC-TH100-C
HDBaseT
CAUTION
!
HDMI
HDC-TH200
Blu-ray player
MSD-402
HDMI / DVI
Up to 98 ft. (30 m)
Analog RGB
DVD player
Composite
video Analog YPbPr
VHS
Y/C
Video camera
[Figure 5.1] Source and sink devices are connected

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6 Precautions
Before connecting to external devices, follow the precautions below.
6.1 Attaching rubber feet
Clean up the MSD main unit, and then attach the provided rubber feet to the bottom four corners of the MSD.
6.2 Installation
When installing the MSD, please observe the following precautions.
・Do not place the MSD on top of another MSD.
・Do not block vent holes. Please secure the space above ambient 30 mm/1.18 inches.
・Do not install the MSD to an enclosed space. When the MSD needs to be installed to EIA rack mount or
an enclosed space, please prepare ventilating equipment to keep the ambient temperature at 40 degrees
C/104 degrees F or less. If inadequately vented, the life of parts may be shortened and operations may be
affected.

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6.3 Cabling
When connecting the MSD to the external devices, please observe the following precautions.
・Read manuals of the external devices.
・Before you connect the cable to the MSD or an external device, please remove electrification of the body
by touching the metal around that is grounded.
・Turn off all devises’ power before connecting the cable.
・Be sure to plug cables completely and install them without any stress on connectors.
・Fix HDMI cables using cable clamps to prevent those cables from falling off.
Fixing HDMI cable using cable clamp
Removing HDMI cable and cable clamp
①②③
Pull out while pressing
④
② ④ ⑤① ③
[Figure 6.1] Attaching a cable clamp
6.3.1 Cables
IDK provides various digital cables such as HDMI, DVI, and twisted pair cables.
Select appropriate cables for your system configuration. For analog audio and RS-232C, process the cable as
needed to fit the connectors.
【See: 6.3.3 Connecting audio cables】
【See: 6.3.4 Connecting RS-232C cable】

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6.3.2 Twisted pair cable
When connecting twisted pair cables to the MSD, please observe the following precautions.
●Cat5e UTP/STP and Cat6 UTP/STP can be used, but we recommend CAT.5E HDC cable* for optimal
performance.
●We recommend connecting the FG connector to a ground source.
When using STP cables, the shielding feature can be optimized. The connected devices will be stable
using the grond connector.
●The shielded STP cables are less affected by interference or external noise than UTP cables.
●Connectors for long-haul extension are the same as that of eight-core modular connector used for
Ethernet, but the transmission system is not the same so that it cannot be connected to Ethernet.
●The maximum extension distance is the shorter one of the maximum extension distances of the connected
devices.
●Pin assignments: T568A or T568B straight
●Do not pull the cable hard. The allowable tension of the twisted pair cable is 110 N.
●Do not bend the connection cable at a sharp angle. Keep the bend radius four times of the cable diameter
or larger.
●Do not tie the cable tightly; leave a space allowing the cable to move slightly.
●If you use the same cables, we recommended keeping a distance between the cables or not to place
the cables closely in parallel.
●Keep the twisted pair cable as straight as you can. If you coil the cable, it is easily affected by noise.
●Do not place the cable in an electrically noisy environment, since high-speed signals are transmitted.
Particularly when you use a high-output radio around the HDC, video or audio may be interrupted.
●If the total extension distance from the transmitter to receiver is 328.08 feet/100 m or less, up to shielded
RJ-45 coupler can be used. Cat6A (10GBase-T) is recommended.
●The table below shows supported extension distance for each twisted pair cable category. Note that the
distance may shorten depending on the actual environment.
[Table 6.2] Twisted pair cable extension distance
External noise
Category
Distance
TMDS clock
Memo
Affected
UTP
Cat5e
50 m/164.04 ft.
<= 225 MHz
IDK recommends Cat5e
STP, Cat6 UTP/STP, or
CAT.5E HDC cable* if the
extension distance exceeds
50 m/164.04 ft.
Cat6
100 m/328.08 ft.
Less affected
STP
Cat5e*
Cat6
100m/328.08 ft.
*CAT.5E HDC cable: dual-shield twisted pair cable which resists noise and protects video signals.
- Bandwidth: 500 MHz up to 328 ft./100 m
- HDBaseT Alliance verified the cable is recommended.
Note:
If there is a problem in the transmission path, video or audio may be interrupted. Check the precautions above.
If the problem still cannot be solved, shortening the twisted pair cable may remedy the problem.

MSD-402 User’s Guide
19
6.3.3 Connecting audio cables
In order to output analog audio, fix the cable to the provided 5-pin terminal block and then connect to the
MSD.
The MSD supports both balanced and unbalanced signals.
IDK recommends AWG 28 to AWG16 cable. The maximum exposed portion length is 7 mm (0.28 inch
approx.).
+
-
+
-
G
L
R
Lch +
Lch -
GND
Rch +
Rch -
Up to 7 mm (0.28 inch approx.)
Balanced signal
Unbalanced signal
-
+
-
+
G
L
R
Lch
GND
Rch
MSD-402
Up to 7 mm (0.28 inch approx.)
[Figure 6.3] Connecting audio cable to terminal block (5-pin) connector
6.3.4 Connecting RS-232C cable
If you use the RS-232C communication, fix the cable to the provided 3-pin terminal block and then connect to
the MSD.
IDK recommends AWG 28 to AWG16 cable. The maximum exposed portion length is 7 mm (0.28 inch
approx.)
If you connect to the MSD using conversion cable from 9-pin D-sub connector cable, short RTS/CTS and
DTR/DSR as needed.
Tx
Rx
G
RS-232C Tｘ
RS-232C Rx
GND
Up to 7 mm (0.28 inch
approx.)
MSD-402
[Figure 6.4] Connecting RS-232C cable to terminal block (3-pin) connector

MSD-402 User’s Guide
20
6.3.5 DIN plug AC adapter
■Attaching/removing AC plug
The shapes of AC plugs with screw-type lock differ from country to country. Use the appropriate AC plug.
Contact us if you have any questions.
Removing:
Slide the AC plug from the AC adapter while holding down the portion mentioned below (①).
①
②
[Figure 6.5] Removing AC plug
Attaching:
Gently slide the AC plug into the AC adapter (③) until it clicks (④).
③
④
Bracket ear
[Figure 6.6] Attaching AC plug