Mitsubishi Electric MDT421S: OSD (On-Screen-Display) Controls

English

English-23

OSD (On-Screen-Display) Controls 

Press MENU button to 

open Main menu.  Press 

UP or DOWN button to 

select sub-menu.

Press EXIT button to 

open Main menu.

Press UP or DOWN 

button to select 

sub-menu.

After selecting the sub-menu 

using UP or DOWN button 

and pressing INPUT button to 

enter the selected sub-menu, 

make adjustment using PLUS 

or MINUS button.

Press INPUT button 

to enter the selected 

sub-menu.

Press EXIT button to go 

back to the previous 

menu screen. By pressing 

EXIT button at Main- 

Menu, Main-Menu 

disappears.

Press UP or DOWN, and PLUS 

or MINUS button to select  

function, or control which you 

like.

Press SET button to decide.

Remote Control

Control Panel

OSD screen

Press MENU or EXIT 

button to exit.

Press SET button 

to decide.

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PICTURE

Main-Menu

BRIGHTNESS

Adjusts the overall image and background screen brightness.

Press + button to increase brightness.

Press - button to decrease brightness.

CONTRAST

Adjusts the image brightness in relation to the input signal.

Press + button to increase contrast.

Press - button to decrease contrast.

SHARPNESS

This function is digitally capable to keep crisp image at any timings.  

It is adjustable to get a distinct image or a soft one as you prefer and set independently for each picture mode.

Press + button to increase sharpness.

Press - button to decrease sharpness.

BLACK LEVEL

Adjusts the image brightness in relation to the background.

Press + button to increase black level.

Press - button to decrease black level.

NOTE: sRGB picture mode is standard and cannot be changed.

NOISE REDUCTION     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Adjusts the noise reduction level.

Press + button to increase reduction level.

Press - button to decrease reduction level.

TINT     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Adjust the tint of all color, or red, magenta, blue, cyan, green, and yellow individually. 

Press + button the flesh tone color becomes greenish.

Press - button the flesh tone color becomes purplish.

COLOR     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Adjust the color saturation of all color, or of red, magenta, blue, cyan, green, and yellow individually.

Press + button to increase color depth.

Press - button to decrease color depth.

COLOR TEMPERATURE

Use to adjust the color temperature. 

The image becomes reddish as the color temperature decreases, and it becomes bluish as the color temperature increases. 

COLOR CONTROL

The color levels of red, green, and blue are adjusted by the color bars. 

R: Red, G: Green, B: Blue

GAMMA SELECTION

Selects a display gamma.

2.2, 2.4, OPTION, S gamma, Native

NOTE: sRGB picture mode is standard and cannot be changed.

Continued on next page.

English

English-25

AUTO BRIGHTNESS

This function controls the screen brightness depending on the ambient light for easy viewing.

In addition, it changes the screen brightness depending on the ambient light and what are displayed on the screen to 

reduce power consumption as low as possible. 

[AUTO BRIGHTNESS]

LOCAL: The auto brightness function is enabled.

REMOTE: The auto brightness function is enabled. In addition, the monitor enters the intercommunication mode where 

multiple monitors are controlled collectively. (See page 33.)

OFF: This function is disabled.

[CONTROL]

PRIMARY: Select this setting to configure the monitor as Master when controlling multiple monitors collectively. 

SECONDARY: Select this setting to use the monitor alone or to configure the monitor as Slave when controlling multiple 

monitors collectively. 

[LIGHT FROM BACK]

YES: Select this setting when there is a light source such lighting equipment and a window behind the monitor.  

NO:   Select this setting when there is no light source such lighting equipment and a window behind the monitor. 

[BACK WALL]

Select the following settings according to the distance between the rear of the monitor and the wall or window. 

FAR: The distance is 5 meters or longer. 

NEAR: The distance is 5 meters or shorter.

[FRONT SENSOR] 

Select ON for normal use. 

OFF: Select this setting when the sensor on the front panel is shielded. 

[REAR SENSOR]

Select ON for normal use. 

OFF: Select this setting when the sensor on the rear panel is shielded.

[SATURATION]

ON: The image saturation is adjusted depending on the ambient light. 

OFF: Image saturation isn't adjusted.

[VIDEO DETECT]

ON: The screen brightness varies depending on what are displayed on the screen to reduce power consumption of the 

monitor. 

OFF: The screen brightness doesn’t vary and the power consumption isn’t reduced. 

PICTURE RESET

Selecting Picture reset allows you to reset all OSD settings about PICTURE setting.

Select “Yes” and press “SET” button to restore to factory preset data.

Press “EXIT” button to cancel and then return to the previous menu.

Continued from previous page.

English-26

OFF

H FLIP

V FLIP

Horizontally rotated

Vertically rotated

SCREEN

Main-Menu

H POSITION

Controls Horizontal Image position within the display area of the LCD.

Press + button to move screen to right.

Press - button to move screen to left.

V POSITION

Controls Vertical Image position within the display area of the LCD.

Press + button to move screen to UP.

Press - button to move screen to DOWN.

CLOCK     

* : INPUT RGB3, 4, 5 only

Press + button to expand the width of the image on the screen the right.

Press - button to narrow the width of the image on the screen the left.

CLOCK PHASE     

* : INPUT RGB3, 4, 5 only

Improves focus, clarity and image stability by increasing or decreasing this setting.

ZOOM MODE

You can select “FULL”, “NORMAL” and “CUSTOM” and “REAL”. (INPUT RGB1, 2, 3, 4, 5, 6 only)  You can also select “FULL”, 

“NORMAL” “DYNAMIC” and “CUSTOM” and “REAL”. (INPUT DVD/HD, VIDEO<S>, VIDEO only)

Selecting “DYNAMIC” will make the screen display panoramic with the expansion of the middle and outside of the screen 

changed. (The upper and the bottom of the image will be cut by expansion.)

Dynamic image is the same as FULL size image when HDTV signal is input.

Selecting “REAL” image will be displayed 1 by 1 pixel.

CUSTOM ZOOM

“CUSTOM ZOOM” will be selected when you select “CUSTOM” on the screen “ZOOM” mode.

ZOOM: expands the horizontal and the vertical size simultaneously.

HZOOM:  expands the horizontal size only.

VZOOM:  expands the vertical size only.

H POSITION: moves to the right with + button. moves to the left with – button.

V POSITION: moves up with + button. moves down with – button.

H RESOLUTION     

* : INPUT RGB1, 2, 3, 4, 5, 6 only

Adjusts the horizontal size by increasing or decreasing the setting.

Press + button to expand the width of the image on the screen.

Press - button to narrow the width of the image on the screen.

V RESOLUTION     

* : INPUT RGB1, 2, 3, 4, 5, 6 only

Adjusts the vertical size by increasing or decreasing the setting.

Press + button to expand the height of the image on the screen.

Press - button to narrow the height of the image on the screen.

ROTATION

The OSD screen is rotated. 

SCREEN RESET

Selecting Screen reset allows you to reset all OSD settings from PICTURE setting.

Select “Yes” and press “SET” button to restore the factory preset data.

Press “EXIT” button to cancel and then return to the previous menu.

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AUDIO

Main-Menu

PIP (PICTURE IN PICTURE)

Note: The “PIP” and “POP” modes do not function when the screen size is “CUSTOM” or “REAL”.

Main-Menu

BALANCE

Adjust the balance of L/R volume.

Press + button to move the stereo sound image to right.

Sound of the left side will be small.

Press - button to move the stereo sound image to left.

TREBLE

To accentuate or reduce the high frequency sound.

Press + button to increase TREBLE sound.

Press - button to decrease TREBLE sound.

BASS

To accentuate or reduce the low frequency sound.

Press + button to increase BASS sound.

Press - button to decrease BASS sound.

AUDIO RESET

Selecting Audio reset allows you to reset all OSD settings from AUDIO setting.

Select “YES” and press “SET” button to restore the factory preset.

Press “EXIT” button to cancel and then return to the previous menu.

PIP SIZE

Selecting the size of picture inserted at the “Picture-in-Picture” (PIP) mode.

“Large”, “Middle” and “Small” are available.

PIP AUDIO

Selecting the sound source in PIP mode.

When selecting “MAIN AUDIO”, you will get the sound for the main picture and when selecting “PIP AUDIO”, 

you will get the sound for the picture instead.

PIP RESET

Selecting PIP Reset allows you to reset all OSD settings from PIP setting.

Select “Yes” and press “SET” button to restore the factory preset data.

Press “EXIT” button to cancel and then return to the previous menu.

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CONFIGURATION 1

Main-Menu

AUTO SETUP     

* : INPUT RGB3, 4, 5 only

Press “SET” button to automatically adjust screen size, horizontal position, vertical position, clock, clock phase, 

white level and black level.

Press “EXIT” button to cancel execution AUTO SETUP and then will return to the previous menu.

AUTO ADJUST     

* : INPUT RGB3, 4, 5 only

Selecting the auto adjust ON/OFF.

Selecting ON when changing the timing, the horizontal position, vertical position and clock-phase will adjust automatically.

POWER SAVE

Selecting RGB “ON”, the monitor will go to power management mode when RGB1, 2, 3, 4, 5, 6 sync is lost.  

Selecting VIDEO “ON”, the monitor will go to power management mode after about 10 minutes delay from when DVD/HD, 

VIDEO<S> and VIDEO input signal is lost.

LANGUAGE

OSD control menus are available in eight languages. 

(English, German, Spanish, French, Italian, Swedish, Chinese and Japanese)

SCREEN SAVER

Select “SCREEN SAVER” functions to reduce the risk of the “image persistence”.

GAMMA: The display gamma is changed and fixed when selected “ON”.

COOLING FAN: The built in cooling fan is always on when set “ON”. When “AUTO” is selected, the built-in cooling fan starts 

rotating automatically when the internal temperature exceeds the operation guarantee range. 

BRIGHTNESS: The brightness is decreased when selected “ON”.

MOTION: Image is slightly expanded and moves 4 directions (UP, DOWN, RIGHT, LEFT) periodically 

(Need setting the time for movement).

Movement area is approximately +/- 10mm from original position; 

Please locate the important information such as text within 90% area of screen image.

See “IMAGE PERSISTENCE” on page 32 for this function.

PIP and STILL will be disabled when “MOTION” is active.

COLOR SYSTEM     

* : INPUT VIDEO<S>, VIDEO only

Selecting the Color System depends on your input video format.

AUTO: NTSC, PAL, SECAM, PAL60 or 4.43 NTSC is automatically selected.

NTSC: Specific selection of NTSC.

PAL: Specific selection of PAL.

SECAM: Specific selection of SECAM.

PAL-60: Specific selection of PAL60.

4.43NTSC: Specific selection of 4.43 NTSC.

SIDE BORDER COLOR

Use to adjust the brightness of the black areas displayed on both sides of 4:3 image. 

OFF, 50, and 100 are selectable. 

CONFIGURATION RESET

Selecting the CONFIGURATION RESET allows you to reset all configuration settings.

Select “Yes” and press “SET” button to restore the factory preset data.

Press “EXIT” button to cancel and return the previous menu.

FACTORY RESET

Selecting “YES” allows you to reset PICTURE, SCREEN, AUDIO, CONFIGURATION1,2 and ADVANCED OPTION will be back 

to factory settings (except LANGUAGE, DATE AND TIME, HDMI INPUT MODE, DVI INPUT MODE, DDC/CI, MONITOR ID and 

SCHEDULE).  

Select “YES” and press “SET” button to restore the factory preset data.  Press “EXIT” button to cancel and return the 

previous menu.

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CONFIGURATION 2

Main-Menu

CAT5 CONTROL  

* : Selectable only when the optional CAT5 Rx BOX is mounted. 

[CAT5 CABLE LENGTH]

Select the cable length, and the defaults of all the adjustment values are automatically determined. 

Select the length that is closest to the actual length of your cable. 

[CAT5 EQ]

Make adjustment so that blur and smear of the displayed letters and graphic objects are minimized. 

[CAT5 R-GAIN, G-GAIN, B-GAIN]

When the displayed image is dark, increase each value. 

When whites aren't displayed as intended, adjust the R-GAIN and B-GAIN values.

[CAT5 R-SKEW, G-SKEW, B-SKEW]

Adjust each value so that the color deviation in the displayed letters and graphic objects is minimized. 

SERIAL CONTROL 

* : Selectable only when the optional CAT5 Rx BOX is mounted. 

Select the communication interface (RS232 or RS485) for the serial communication function.

For connection of the signal cable, see page 35.

RS485 TERMINATION 

* : Selectable only when the optional CAT5 Rx BOX is mounted. 

Turn ON or OFF the termination resistance of the RS-485 interface.

ON: Select this setting to use the monitor alone or to configure the monitor as the one at the end of the connection when more 

than one monitor is multi-connected.

OFF: Select this setting to configure the monitor as other than the one at the end of the connection when more than one 

monitor is multi-connected. 

OSD TURN OFF

The OSD control menu will stay on as long as it is use.  In the OSD Turn Off submenu, you can select how long the monitor 

waits after the last touch of a button to shut off the OSD control menu. 

The preset choices are 5 -120 seconds.

INFORMATION OSD

Selects the information OSD display or not. 

The information OSD will display when input signal or source change or warning message like as no-signal or out-of range.

A time between 1 to 10 seconds is available.

OFF TIMER

To select OFF TIMER mode ON/OFF.

In the OFF TIMER menu, you can preset the monitor to automatically power down.

A time between 1 to 24 hours is available.

When the OFF TIMER is set, the SCHEDULE (see page 31) settings will be disabled.

OSD H POSITION

Adjusts the horizontal position of the OSD menu.

OSD V POSITION

Adjusts the vertical position of the OSD menu.

MONITOR INFORMATION

Indicates the model and serial number of your monitor.

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ADVANCED OPTION

Main-Menu

INPUT RESOLUTION

* : INPUT RGB3, 4, 5 only

Selects to decision of input signal about below timings, 1024x768, 1280x768 and 1360x768.

AUTO: Determines the resolution automatically.

1024x768: Determines the resolution as 1024x768

1280x768: Determines the resolution as 1280x768

1360x768: Determines the resolution as 1360x768

The setting you select becomes effective when POWER is turned OFF and ON again.

BLACK LEVEL EXPANSION     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Selects a level of black expansion from “OFF”, “MIDDLE” and “HIGH.”

In case of go under the black cut-off level, please adjust the “Black level” in moderation on OSD menu.

SCAN MODE     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Changes the display area of the image.

OVERSCAN: Set to display area about 95%

UNDERSCAN: Set to display area about 100%

NOTE: When the PIP function is activated, SCAN MODE is forcefully set to OVERSCAN.  

SCAN CONVERSION     

* : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO<S>, VIDEO only

Selects IP (Interlace to Progressive) converter function.  

PROGRESSIVE: Enable the IP function, to convert interlace signal to progressive. Normally use this setting.

INTERLACE: Disable the IP function.

FILM MODE

Selects Film mode function.

AUTO: Enable the Film mode function. This mode is better suited for movies, which is converted 24 Frames/sec source 

to DVD Video. We recommend to select “PROGRESSIVE” in “SCAN CONVERSION”.

OFF: Disable the Film mode function. This mode is better suited for Broadcasting or VCR source.

NOTE: When FILM MODE is AUTO, set SCAN CONVERSION to PROGRESSIVE. 

IR CONTROL

Selects the operation mode of the wireless remote controller when multiple MDT421S monitors are connected via RS-232C. 

Select from the following four modes using the      or      button and then accept the selected mode by pressing the SET button.

NORMAL: The monitor will be controlled normally by wireless remote controller.

PRIMARY: The first MDT421S monitor of those multi-connected via RS-232C is designated as PRIMARY. 

SECONDARY: MDT421S monitors other than the first one multi-connected via RS-232C are designated as SECONDARY. 

LOCK: Disable the monitor control by infrared wireless remote controller.

Keep pressing “DISPLAY” button during 5 sec or more, this setting will return to “NORMAL”.

TILING

TILING demonstrates multiple screens. This feature provides a single large screen using up to 25 monitors.  

It will be able to divide up to 5 each H and V.  

This requires you to feed the PC output into each of the monitors through a distributor.

H MONITORS: Select number of horizontal divide.

V MONITORS: Select number of vertical divide.

POSITION: Select a position to expand the screen.

FRAME COMP.: Works in tandem with TILING to compensate for the width of the tile bezels in order to accurately 

display the image.

ENABLE: Select “YES”, the monitor will expand the selected position. 

PIP and STILL will be disabled when “TILING” is activated.

Continued on next page.

English

English-31

HEAT STATUS

Information of status for COOLING FAN, BRIGHTNESS and TEMPERATURE.

COOLING FAN comes to run when inside temperature is over a guaranteed limit.

In this case warning is displayed on the screen.

POWER ON DELAY

Adjusts the delay time from “standby” to “power on” mode.

“POWER ON DELAY” time is selectable from 0-50 seconds.

DATE AND TIME

Adjusts the current date and time for internal clock.

You should set this function when you use “SCHEDULE”.

SCHEDULE

Programs the monitor's working schedule.

Schedule the power on and power off with hour and a day of the week. Also sets the input port.

This OSD can't remove except EXIT.

(See “HOW TO SETUP SCHEDULE” on page 32.)

HDMI INPUT MODE

Select “HDMI-PC” when PC or other computer equipment is connected via HDMI.

Select “HDMI-HD” when DVD player, which has HDMI output, is connected via HDMI.

DVI INPUT MODE

Select “DVI-PC” when PC or other computer equipment is connected via DVI-D.

Select “DVI-HD” when DVD player, which has HDMI output, is connected via DVI-D.

MONITOR ID

ID numbers for remote control are assigned to MDT421S monitors that are multi-connected via RS-232C. 

ID numbers 1 to 26 are selectable. 

DDC/CI

Use to turn ON or OFF the DDC/CI communication function. Select ON for normal use. 

SYNC TYPE     

* : INPUT RGB3, 4 only

Select “0.3V” for 0.3 Composite Sync.

Select  “TTL” for TTL Sync. 

ADVANCED OPTION RESET

Selecting ADVANCED OPTION RESET allows you to reset all OSD settings from ADVANCED OPTION settings, 

except for DATE AND TIME, SCHEDULE, HDMI INPUT MODE, DVI INPUT MODE, MONITOR ID, and DDC/CI.

Select “YES” and press “SET” button to restore the factory preset data.

Press “EXIT” button to cancel and then return the previous menu.

Continued from previous page.

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NOTE

< IMAGE PERSISTENCE >

Please be aware that LCD Technology may experience a phenomenon known as Image Persistence. Image Persistence 

occurs when residual or “ghost” image of a previous image remains visible on the screen. Unlike CRT monitors, LCD 

monitors’ image persistence is not permanent, but constant images being displayed for a long period of time should be 

avoided.

To alleviate image persistence, turn off the monitor for as long as the previous image was displayed. For example, if an 

image was on the monitor for one hour and a residual image remains, the monitor should be turned off for one hour to erase 

the image.

As with all personal display devices, MITSUBISHI ELECTRIC recommends displaying moving images and using a moving 

screen saver at regular intervals whenever the screen is idle or turning off the monitor when not in use.

Please set “POWER SAVE”, “SCREEN SAVER”, “DATE AND TIME” and “SCHEDULE” functions to further reduce the risk of 

Image persistence.

< For long life use of Public Display >

Image Sticking of LCD Panel 

When LCD panel is operated continuously for long hours, a trace of electric charge remains near the electrode inside LCD, and 

residual or “ghost” image of previous image may be observed. (Image Persistence)

Image Persistence is not permanent, but when a 

fi

 xed image is displayed for a long period, ionic impurities inside LCD are 

accumulated along the displayed image, and it is observed permanently. (Image Sticking)

Recommendations

For preventing the fast transition to Image Sticking, and for longer life usage of LCD, the following are recommended.

1.   Fixed images should not be displayed for long periods of time, and changed to another images with short cycle.

2.   When the monitor is not in use, please turn it off using the remote control, use the Power Management Function or use the 

Schedule Function.

3.   Reducing the environmental temperature is effective for long life use.

When a Protection board (glass, acrylic) is installed over the LCD surface, enclosed into the box / wall, or the monitors are 

stacked, please utilize the temperature sensors inside monitor.

To reduce the environmental temperature, the monitor should be set Low Brightness or Cooling Fan “ON” by using the 

Screen saver Function.

4.   Please use “Screen Saver Mode” of monitor.

< HOW TO SETUP SCHEDULE >

Using the “SCHEDULE” function allows you to set up to seven different scheduled time intervals when the LCD Monitor will be 

activated.

You can select the time the monitor turns on and turns off, the day of week the monitor is activated, and which input source the 

monitor will use for each scheduled activation period. A check mark in the box next to the number of the schedule 

indicates that the selected schedule is in effect.

To select which schedule to set, use the up/down arrows to move the number (1 to 7) of the schedule.

Use the (+) and (-) buttons to move the cursor horizontally within the particular schedule. Use the (

) and (

) buttons to 

increase time and select input port. The “SET” button is used to make a selection.

If you create a schedule but do not want to use a power on time, select “--” in the “ON” time slot.

If you do not want to use a power off time select “--” in the OFF time slot.

If there is no input selected (“--” showing in the input spot) the input from the previous schedule will be used.

The selection of EVERY DAY within a schedule takes priority over other schedules that are set up to operate weekly.

When schedules are overlapping, scheduled Power ON time has priority over scheduled Power OFF time.

If there are two schedules programmed for the same time, then the highest numbered schedule has priority.

When the “OFF TIMER” (see page 29) is set, the “SCHEDULE” function is disabled.

English

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< PIP, POP and SIDE BY SIDE >

The following table shows the combination of signal inputs under which the “PIP” and “POP” modes function. These modes do 

not function, however, when the screen size is “CUSTOM” or “REAL”.

< Supplemental information of the auto brightness function >

To control multiple monitors collectively

In such a case where the tiling function is used, you can control the auto brightness function by sharing the detection result of 

the brightness sensor of a certain monitor among the connected monitors. 

1.  Multi-connect the monitors using RS-232C or CAT5 cables separately sold as shown by the example below.  

Monitor

ID = 9

(Slave)

Monitor

ID = 8

(Slave)

Monitor

ID = 7

(Slave)

Monitor

ID = 6

(Slave)

Monitor

ID = 5

(Slave)

Monitor

ID = 4

(Slave)

Monitor

ID = 3

(Slave)

Monitor

ID = 2

(Slave)

Monitor

ID = 1

(Master)

Master:  Monitor configured as Master that detects 

the outside light (Monitor ID is “1”.)

Slave:  Monitor controlled by the Master monitor

(Monitor ID is other than “1”.) 

2.  Assign a monitor ID to each multi-connected MDT421S using MONITOR ID. (See page 31.)

Monitor ID is selectable from 1 to 26. 

The monitor ID of the Master monitor should be “1” and those of the Slave monitors should be other than “1”. 

You are recommended to assign IDs to the monitors consecutively from 1, 2, 3, and on. 

3.  Set AUTO BRIGHTNESS on the OSD screen (PICTURE) as follows. 

LOCAL

REMOTE

PRIMARY

SECONDARY

Master monitor

Slave monitors

AUTO BRIGHTNESS

CONTROL

RGB1

(HDMI)

RGB1 (HDMI)

RGB2 (DVI-D)

RGB3 (D-SUB)

RGB4 (BNC)

RGB5* (CAT5)

RGB6 (DISPLAY PORT)

DVD/HD (YPbPr)

VIDEO<S>

VIDEO

RGB2

(DVI-D)

RGB3

(D-SUB)

RGB4

(BNC)

RGB5*

(CAT5)

RGB6

(

)

DISPLAY

PORT

DVD/HD

(YPbPr)

VIDEO

VIDEO<S>

SUB

MAIN

: Supported

: Not supported

PIP SIZE

SMALL

MIDDLE

LARGE

: 450 pixels X 338 pixels

: 675 pixels X 450 pixels 

: 900 pixels X 675 pixels

: 450 pixels X 338 pixels

POP SIZE

“PIP”, “POP” mode resolution (Reference)

Press the “PIP ON/OFF” buttons on the remote control to change between “PIP”, “POP” and “SIDE BY SIDE” 

mode as shown in the diagram below.

PIP

POP

OFF

SIDE BY SIDE

ASPECT

SIDE BY SIDE

FULL

* : RGB 5 becomes usable when the optional CAT5 Rx BOX is mounted.  

English-34

To use a computer to control the monitors

When using a computer to control the monitors, you must prepare an application software program for control by yourself. 

1.  Connect the RS-232C IN connector of the Master monitor shown above and the RS-232C connector of the computer using 

an RS-232C cable. 

Or, using a CAT5 cable, connect the RS-232C connector of the computer to the CAT5 IN connector of the Master monitor via 

the CAT5 Tx BOX. 

2.  Assign a monitor ID to each multi-connected MDT421S using MONITOR ID. (See step 2 on page 33.) 

3.  Set AUTO BRIGHTNESS on the OSD screen (PICTURE) as follows. 

REMOTE

REMOTE

SECONDARY

SECONDARY

Master monitor

Slave monitors

AUTO BRIGHTNESS

CONTROL

4.  For the speci

fi

 cations of the communication commands, contact your dealer. 

< Remote control numbering function >

By connecting multiple MDT421S monitors using RS-232C cables, you can control any one monitor or all the monitors by one 

remote controller. 

1.   Assign arbitrary ID number to each of multi-connected MDT421S monitors using MONITOR ID. 

ID numbers 1 to 26 are selectable. 

It is recommended to assign sequential ID numbers from 1 and up. 

2.   The remote control mode of the 

fi

 rst MDT421S monitor is set to PRIMARY and those of the other monitors are set to 

 SECONDARY. 

3.   When you direct the remote controller at the remote control signal sensor of the PRIMARY monitor and press the DISPLAY 

button on the remote controller, the ID selection OSD appears at the upper left of the screen. 

ID:1

ID No. :2

Select the ID number of the monitor you want to control using the +/- button 

on the remote controller. 

The ID of the monitor you want to control is displayed at the upper left of its screen. 

By selecting ALL, you can control all the multi-connected monitors. 

ID number of the currently viewed monitor

4.   Direct the remote controller at the remote control signal sensor of the PRIMARY monitor. 

OSD appears on the monitor having the ID number you selected. 

NOTE:

When the ID selection OSD is being displayed on the PRIMARY monitor, press the DISPLAY button on the remote controller 

again to cancel the ID selection OSD and then control the monitor you selected.

NOTE:

If you set the remote control mode wrongly and remote control operation becomes unavailable, press any button on the control 

panel of the monitor to display the OSD screen and change the remote control mode using ADVANCED OPTION. By pressing 

and holding down the DISPLAY button on the remote control for 5 seconds or longer, the remote control mode is initialized to 

NORMAL.