K R A ME R E LE CT R O N IC S L TD .

USER MANUAL

MODEL:

VP-438
Presentation Switcher /Scaler

P/N: 2900-000642 Rev 8

Contents
1 Introduction 1
2 Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 3
2.3 Recycling Kramer Products 3
3 Overview 4
3.1 Defining the VP-438 Presentation Switcher/Scaler 5
4 Installing in a Rack 8
5 Connecting the VP-438 9
6 Controlling the VP-438 11
6.1 Controlling via the Front Panel Buttons 11
6.2 Using the OSD Menu 11
6.3 Connecting to VP-438 via RS-232 14
6.4 Controlling via the Infrared Remote Control Transmitter 15
7 Technical Specifications 16
7.1 Input Resolutions 17
8 RS-232 Communication Protocol 18

Figures
Figure 1: VP-438 Presentation Switcher/Scaler Front Panel 6
Figure 2: VP-438 Presentation Switcher/Scaler Rear Panel 7
Figure 3: Connecting the VP-438 Presentation Switcher/Scaler 10
Figure 4: Infrared Remote Control Transmitter 15

VP-438 – Contents i
1 Introduction

Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been

providing a world of unique, creative, and affordable solutions to the vast range of
problems that confront video, audio, presentation, and broadcasting professionals
on a daily basis. In recent years, we have redesigned and upgraded most of our
line, making the best even better!

Our 1,000-plus different models now appear in 11 groups that are clearly defined
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:
Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 7:
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11:
Sierra Products.

Congratulations on purchasing your Kramer VP-438 Presentation Switcher/Scaler,

which is ideal for the following typical applications:

 Projection systems in conference rooms, boardrooms, auditoriums, hotels

and churches, production studios, rental and staging

 Home theater up-scaling

VP-438 - Introduction 1
2 Getting Started

We recommend that you:

 Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment

 Review the contents of this user manual

i
Go to http://www.kramerelectronics.com/support/product_downloads.asp
to check for up-to-date user manuals, application programs, and to check
if firmware upgrades are available (where appropriate).

2.1 Achieving the Best Performance

To achieve the best performance:

 Use only good quality connection cables (we recommend Kramer high-
performance, high-resolution cables) to avoid interference, deterioration in
signal quality due to poor matching, and elevated noise levels (often
associated with low quality cables)

 Do not secure the cables in tight bundles or roll the slack into tight coils

 Avoid interference from neighboring electrical appliances that may adversely

influence signal quality

 Position your Kramer VP-438 away from moisture, excessive sunlight and
dust

!
This equipment is to be used only inside a building. It may only be
connected to other equipment that is installed inside a building.

2 VP-438 - Getting Started

2.2 Safety Instructions

!
Caution: There are no operator serviceable parts inside the unit

Warning: Use only the power cord that is supplied with the unit

Warning: Do not open the unit. High voltages can cause

electrical shock! Servicing by qualified personnel only

Warning: Disconnect the power and unplug the unit from the wall
before installing

2.3 Recycling Kramer Products

The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC

aims to reduce the amount of WEEE sent for disposal to landfill or incineration by
requiring it to be collected and recycled. To comply with the WEEE Directive,
Kramer Electronics has made arrangements with the European Advanced
Recycling Network (EARN) and will cover any costs of treatment, recycling and
recovery of waste Kramer Electronics branded equipment on arrival at the EARN
facility. For details of Kramer’s recycling arrangements in your particular country
go to our recycling pages at http://www.kramerelectronics.com/support/recycling/.

VP-438 - Getting Started 3

3 Overview

The Kramer VP-438 is a high-quality presentation switcher and scaler. It accepts

one of 10 inputs: four HDMI signals, two computer graphics signals on 15-pin HD
connectors, two composite video signals on RCA connectors and two component
video signals (also known as Y, Pb, Pr, Y, Cb, Cr and YUV; compatible with both
SD and HD component) on RCA connectors. It scales the video, embeds the
audio, and outputs the signal to the HDMI output, as well as to a computer
graphics output and an RGBHV video output with digital audio and analog stereo
audio outputs.

The VP-438 Presentation Switcher/Scaler:

 Is HDTV compatible and the resolution can be up- or down-scaled

 Is HDCP compliant, the HDCP (High Definition Content Protection) license

agreement allows copy−protected data on the HDMI input to pass only to the
HDMI output

 Output signal is available in three formats: 1 HDMI and 2 RGBHV (on 5 BNC
connectors, and one 15−pin HD connector)

 Has analog audio inputs, which include volume control, and digital (S/PDIF)
and analog stereo audio outputs

 Automatically detects and selects the audio source for the HDMI input.
Default selection is HDMI – if this is not present, then the machine uses the
audio from the analog input

 Comes with an On-Screen Display (OSD) for easy setup and adjustment,
accessible via the IR remote control and via the front-panel buttons

 Has a non-volatile memory that retains the last settings used

 Supports firmware upgrade via RS-232

4 VP-438 - Overview
 Control your VP-438:

 Directly, via the front panel push buttons

 By RS-232 serial commands transmitted by a touch screen system, PC, or

other serial controller

 Remotely, from the infrared remote control transmitter

The VP-438 is housed in a 19” 1U rack mountable enclosure, with rack “ears”
included, and is fed from a 100-240V AC universal switching power supply.

3.1 Defining the VP-438 Presentation Switcher/Scaler

This section defines the VP-438.

VP-438 - Overview 5
6

Figure 1: VP-438 Presentation Switcher/Scaler Front Panel

# Feature Function
1 IR Receiver Receives signals from the remote control transmitter
2 CV Button Press to select the composite video input (from 1 to 2)
3 COMPONENT Button Press to select the component video input (from 1 to 2)
4 PC Button Press to select the computer graphics input (from 1 to 2)
5 HDMI Button Press to select the HDMI input (from 1 to 4)
6 BLANK Button Press to toggle between a blank screen and the display (can be programmed to follow MUTE, see Section 6.2.3)
7 MUTE Button Press to toggle between muting (blocking out the sound) and enabling the audio output
8 FREEZE Button Press to freeze/unfreeze the output video image
9 MENU Button Displays the OSD menu (see Section 6.2)
10 ENTER Button Press to accept changes and change the SETUP parameters (see Section 6.2)
11 -  Button Press to decrease numerical values or select from several definitions.
When not within the OSD menu mode, press to reduce volume (for embedded HDMI inputs, this does not affect the
embedded output)
12  Button Press to move up the menu list
13 +  Button Press to increase numerical values or select from several definitions.
When not within the OSD menu mode, press to increase volume (for embedded HDMI inputs, this does not affect the
embedded output)
14  Button Press to move down the menu list
15 RESET TO XGA/720p Button Press and hold to reset the video resolution to XGA or 720p (press and hold for about 2 seconds to reset to
VP-438 – Overview

XGA; or press and hold for about 5 seconds to reset to 720p)

16 PANEL LOCK Button Press and hold for about 2 seconds to lock/unlock the front panel buttons

6 VP-438 - Overview
VP-438 – Overview

Figure 2: VP-438 Presentation Switcher/Scaler Rear Panel

# Feature Function
17 HDMI Connector Connect to the HDMI source (from 1 to 4)
VIDEO INPUTS

18 PC 15-pin HD Connector Connect to the computer graphics source (from 1 to 2)

19 CV RCA Connector Connect to the composite video source (from 1 to 2)
20 PR RCA Connector
Connect to the component video source (from 1 to 2)
21 PB RCA Connector
For component video, connect all three connectors: Y, Pr, Pb (also known as YUV)
22 Y RCA Connector
23 HDMI Connect to the analog audio HDMI source (from 1 to 4)
AUDIO INPUTS Unbalanced Stereo PC Connect to the analog audio computer graphics source (from 1 to 2)
Terminal Block Connectors CV Connect to the analog audio composite video source (from 1 to 2)
COMP Connect to the analog audio component video source (from 1 to 2)
24 H BNC Connector
VIDEO OUTPUTS

25 V BNC Connector
26 R BNC Connector Connect to the RGBHV video acceptor
27 G BNC Connector
28 B BNC Connector
29 HDMI Connector Connect to the HDMI acceptor
30 PC 15-pin HD Connector Connect to a VGA acceptor
31 AUDIO OUTPUTS RCA Connectors L Connect to the left stereo analog audio acceptor
32 R Connect to the right stereo analog audio acceptor
33 S/PDIF Connect to a digital audio acceptor
34 RS-232 9-pin D-sub Port Connect to the PC or the remote controller
35 Power Connector with Fuse AC connector, enabling power supply to the unit
36 Power Switch Switch for turning the unit ON or OFF
7

VP-438 - Overview 7
4 Installing in a Rack

This section provides instructions for rack mounting the unit.

8 VP-438 - Installing in a Rack

5 Connecting the VP-438

i
Always switch off the power to each device before connecting it to your
VP-438. After connecting your VP-438, connect its power and then
switch on the power to each device.

To connect your VP-438, as illustrated in the example in Figure 3, do the following:

You do not have to connect all the inputs and outputs, connect only those that are required.

1. Connect an HDMI source (for example, a DVD player) to each of the HDMI
VIDEO INPUT connectors (from 1 to 4).
Alternatively, you can connect the DVI connector on the DVD player to the HDMI
connector on the VP-438 via a DVI-HDMI adapter. When using this adapter, you can
connect the audio signal via the terminal block connector.

2. Connect a computer graphics source to the PC 1 15-pin HD VIDEO INPUT

connector.

3. Connect a composite video source (for example, a composite video player)

to both CV VIDEO INPUT RCA connectors.

4. Connect a component video source (for example, a component video player)

to the COMP 1 PR, PB and Y, VIDEO INPUT RCA connectors.

5. Connect the audio input signals to the AUDIO INPUT terminal block
connectors, as required (not shown in Figure 3).

6. Connect the RGBHV VIDEO OUTPUT BNC connectors to an RGBHV

acceptor (for example, an RGBHV display).

7. Connect the HDMI VIDEO OUTPUT connector to an HDMI acceptor (for

example, a plasma display).

8. Connect the VGA VIDEO OUTPUT 15-pin HD connector to a VGA acceptor

(for example, a projector).

9. Connect the audio output signals to the AUDIO OUTPUTS stereo analog
audio acceptor and/or the digital audio acceptor, as required (not shown in
Figure 3).

10. Connect the power cord (not shown in Figure 3).

VP-438 - Connecting the VP-438 9

 Figure 3: Connecting the VP-438 Presentation Switcher/Scaler

10 VP-438 - Connecting the VP-438

6 Controlling the VP-438

The VP-438 can be controlled via:

 The front panel buttons (see Section 6.1)

 The OSD menu (see Section 6.2)

 RS-232 serial commands transmitted by a touch screen system, PC, or other

serial controller (see Section 6.3)

 The infrared remote control transmitter (see Section 6.4)

6.1 Controlling via the Front Panel Buttons

The VP-438 includes the following front panel buttons:

 Input selector buttons for selecting the required input: CV (1 and 2),
COMPONENT (1 and 2), PC (1 and 2) or HDMI (1 to 4)

 BLANK, MUTE and FREEZE buttons

 MENU, ENTER, and up, down, left and right arrow buttons

 RESET TO XGA/720p and PANEL LOCK buttons

6.2 Using the OSD Menu

The control buttons let you control the VP-438 via the OSD menu.

Press the:

 MENU button to enter the menu (The default timeout is set to 10 seconds)

 ENTER button to accept changes and to change the menu settings

 Arrow buttons to move through the OSD menu, which is displayed on the
video output

On the OSD menu, select EXIT to exit the menu.

VP-438 - Controlling the VP-438 11

6.2.1 The MAIN MENU

i
The range and default values vary according to the input signal.

Mode Function
CONTRAST Set the contrast
BRIGHTNESS Set the brightness
FINETUNE (see Section 6.2.2)
COLOR Set the red, green and blue shades
SIZE Select the size of the display: FULL, OVERSCAN, UNDER1, UNDER2,
LETTER BOX, PANSCAN, BEST FIT (default, FULL)
SOURCE Select the source: (default VGA)
Appears as: Source input Appears as: Source input
CV1 CV 1 PC2 VGA 2
CV2 CV 2 HDMI1 HDMI 1
YPBPR1 COMP 1 HDMI2 HDMI 2
YPBPR2 COMP 2 HDMI3 HDMI 3
PC1 VGA 1 HDMI4 HDMI 4
OUTPUT Select the output resolution from the menu (default NATIVE):
Output resolution: Appears as: Output resolution: Appears as:
480i 480I 1080p@59.94Hz 1080P59
480p 480P 640x480 VGA
720p @50Hz 720P60 800x600 SVGA
1080i @60Hz 1080I60 1024x768 XGA
1080p @60Hz 1080P60 1280x1024 SXGA
576i 576I 1600x1200 UXGA
576p 576P 1366x768 WXGA
720p @50Hz 720P50 NATIVE
1080i @50Hz 1080I50 1680x1050 WSXGA
1080p @50Hz 1080P50 1920x1200 WUXGA
480i@59.94Hz 480I59 1280x800 1280x800
480p@59.94 Hz 480P59 1440x900 WXGA+
720p@59.94Hz 720P59 1400x1050 SXGA+
1080i@59.94Hz 1080I59 1600x900 1600x900
NATIVE - Select NATIVE to select the output resolution from the EDID of the
connected HDMI monitor
AUDIO See Section 6.2.3
OSD Set the OSD parameters: H POSITION, V POSITION, TIMER,
BACKGROUND and DISPLAY (see Section 6.2.4)
HDCP ON INPUT Select the HDCP option for the HDMI input: either ON (the default) or OFF.
Setting HDCP support to enabled (ON) on the HDMI input allows the source
to transmit a non-HDCP signal if required (for example, when working with a
Mac computer)

12 VP-438 - Controlling the VP-438

 Mode Function
HDCP ON Select FOLLOW INPUT or FOLLOW OUTPUT to define whether the HDCP
OUTPUT will follow the input or the output
When FOLLOW INPUT is selected, it changes its HDCP output setting (for
the HDMI output) according to the HDCP of the input. This option is
recommended when the HDMI output is connected to a splitter/switcher
When FOLLOW OUTPUT is selected, the scaler matches its HDCP output
to the HDCP setting of the HDMI acceptor to which it is connected
FACTORY Resets to the default parameters
RESET If you cannot see the display after factory reset, use the front panel Res. button
to set the correct resolution: press continuously for 2 seconds to reset to XGA, or
continuously for 5 seconds to reset to 720p
INFORMATION Displays the source, the input resolution, the output resolution and the
software version and the H/W version
AUTO SYNC Turn the auto sync ON/OFF. When ON, a short period after not detecting a
OFF valid video signal on the selected input, the unit will disable the H and V
syncs on the analog outputs until a valid input is again detected or any
keypad button is pressed
EXIT Select to exit the menu

6.2.2 The FINETUNE Menu

The following table defines the FINETUNE menu:

Input Signal Parameter Function
CV, HUE Set the color hue
COMPONENT SATURATION Set the color saturation
SHARPNESS Set the sharpness of the picture
NOISE REDUCTION Select the noise reduction: OFF, HI, LOW and MID
(middle)
COLOR FILTER Set to ON to enable color filtering
May improve the output image for certain graphic cards
where color fringing is seen
VGA PHASE Set the clock phase
CLOCK Set the clock frequency
H-POSITION Set the horizontal position of the picture
V-POSITION Set the vertical position of the picture
AUTO TUNE When set to ON, automatically centers the picture
correctly on the screen every time the input is switched
to VGA or when the input resolution changes
Alternatively, you can auto adjust the image by pressing
the ENTER button when not within the OSD menu
COLOR FILTER Set to ON to enable color filtering
HDMI COLOR FILTER Set to ON to enable color filtering
DROP LINES Set it to ON to eliminate the green line (default is OFF)
With some sources (mostly Apple devices) a green line
sometimes appears at the bottom of the display. By
factory default this option is set to OFF.

i
The COLOR FILTER feature may improve the output image for
certain graphic cards where color fringing is seen.

VP-438 - Controlling the VP-438 13

6.2.3 The AUDIO Menu

The following table defines the AUDIO menu.

Parameter Function
OUTPUT VOLUME Set the output volume (from 0 to 100)
Not applicable for embedded HDMI audio inputs
INPUT VOLUME Set the input volume (from 0 to 100)
Not applicable for embedded HDMI audio inputs
DELAY Select the audio delay time: OFF, 40ms, 110ms and 150ms
SOUND Select the sound options: ON, MUTE
MUTE FOLLOWS Select the action that will be followed by mute: INDEPENDENT,
FREEZE, BLANK, FREEZE/BLANK
INDEPENDENT means that the audio muting is independent of the
FREEZE and BLANK functions
FREEZE/BLANK means that when you FREEZE or BLANK the video, then
the audio will be muted (the MUTE function follows the FREEZE and the
BLANK functions)
HDMI AUDIO IN Select AUTOMATIC (In this case, the embedded audio on the HDMI
Enabled only when one input is selected for an HDMI signal, or the analog audio input is
of the HDMI inputs is selected if the input is not HDMI (for example, for a DVI input signal),
selected EMBEDDED (In this case, the embedded audio in the HDMI signal is
selected) or ANALOG (In this case, the analog audio input is selected)

6.2.4 The OSD Menu

The following table defines the OSD menu.

Parameter Function
H POSITION Set the horizontal position of the OSD (from 0 to 100)
V POSITION Set the vertical position of the OSD (from 0 to 100)
TIMER Set the timeout period in seconds (from 5 to 100)
BACKGROUND Set the OSD background between 0 (solid black) and 8 (transparent)
DISPLAY Select the information shown on the screen during operation:
ON - the information is shown permanently
OFF - the information is not shown
INFO - the information is shown for a few seconds

6.3 Connecting to VP-438 via RS-232

You can connect to the VP-438 via an RS-232 connection using, for example, a
PC. Note that a null-modem adapter/connection is not required.

To connect to the VP-438 via RS-232, connect the RS-232 9-pin D-sub rear panel
port on the VP-438 unit via a 9-wire straight cable (only pin 2 to pin 2, pin 3 to pin
3, and pin 5 to pin 5 need to be connected) to the RS-232 9-pin
D-sub port on your PC.

14 VP-438 - Controlling the VP-438

6.4 Controlling via the Infrared Remote Control Transmitter

You can control the VP-438 from the infrared remote control transmitter, as
defined in Figure 4:

Keys Function

SIZE POWER SIZE Set the size of the image displayed

POWER Toggle the power save mode ON or
OFF
CV1 CV2 COMP1
CV1 Select the composite video 1 input

COMP2 PC1 PC2 CV2 Select the composite video 2 input

COMP1 Select the component video 1 input
HDMI1 HDMI2 HDMI3 COMP2 Select the component video 2 input
PC1 Select the UXGA 1 input
HDMI4
PC2 Select the UXGA 2 input
HDMI1 Select the HDMI 1 input
INFO NATIVE
HDMI2 Select the HDMI 2 input
HDMI3 Select the HDMI 3 input
HDMI4 Select the HDMI 4 input

MENU EXIT XGA Reset Reset the resolution to XGA

720p Reset Reset the resolution to 720p
INFO Displays the selected input, the input
and output resolutions and the firmware
FREEZE BLANK MUTE versions on the OSD
NATIVE Select the output resolution via the
EDID of the connected HDMI monitor
Four navigation keys
When not in the OSD, the left and
right arrows also control the output
volume
For embedded HDMI inputs, this does
not affect the embedded output
OK Press to accept changes
LR-30
MENU Enter the OSD menu
EXIT EXIT the menu
FREEZE Freeze/unfreeze the output video image
Figure 4: Infrared Remote Control BLANK Toggle between a blank screen and the
Transmitter display
MUTE Toggle between muting (blocking out
the sound) and enabling the audio
output

VP-438 - Controlling the VP-438 15

7 Technical Specifications
INPUTS: 4 HDMI connectors (HDMI, HDCP version 1.1)
2 VGA on a 15-pin HD connector
2 composite video on an RCA connector
2 component video each on 3 RCA connectors
Unbalanced stereo audio on 10 3-pin terminal block
connectors
OUTPUT: 1 RGBHV on 5 BNC connectors
1 HDMI connector (HDMI, HDCP version 1.1)
1 VGA (RGBHV) on a 15-pin HD connector
1 S/PDIF on an RCA connector
1 analog stereo audio on 2 RCA connectors
OUTPUT COLORSPACE: RGB
H FREQUENCY: 15.63-90kHz
V FREQUENCY: 50-100Hz
RGB SYNCS: H and V TTL separated syncs
RGB LEVEL: 1.2Vpp max, 75 load
XGA OUT LEVEL: 1.2Vpp max, 75 load
S/PDIF OUT LEVEL: 0.55Vpp constant
OUTPUT RESOLUTIONS: 480i, 480p, 720p @50Hz, 1080i @60Hz, 1080p @60Hz, 576i,
576p, 720p @50Hz, 1080i @50Hz, 1080p @50Hz,
480i@59.94Hz, 480p@59.94 Hz, 720p@59.94Hz,
1080i@59.94Hz, 1080p@59.94Hz, 640x480, 800x600,
1024x768, 1280x1024, 1600x1200, 1366x768, 1680x1050,
1920x1200, 1280x800, 1440x900, 1400x1050, 1600x900
CONTROLS: CV 1, CV 2, component 1, component 2, PC 1, PC 2, HDMI
1, HDMI 2, HDMI 3, HDMI 4, input selector buttons; blank,
mute, freeze buttons; menu, enter, menu arrows, reset to
XGA/720p, lock buttons, RS-232, IR
POWER CONSUMPTION: 100-240V AC, 25VA max.
OPERATING 0° to +40°C (32° to 104°F)
TEMPERATURE:
STORAGE TEMPERATURE: -40° to +70°C (-40° to 158°F)
HUMIDITY: 10% to 90%, RHL non-condensing
DIMENSIONS: 100-240V AC, 25VA max.
WEIGHT: 19" x 7" x 1U (W, D, H) rack mountable
ACCESSORIES: 2.7kg (6lbs) approx
OPTIONS: Power cord, rack ears, IR remote control
Specifications are subject to change without notice at http://www.kramerelectronics.com

16 VP-438 - Technical Specifications

7.1 Input Resolutions
Y, Pb, Pr
Resolution/Refresh Rate CV PC HDMI
(Component)
480I/576I(NTSC/PAL) Yes Yes No Yes
480P/576P Yes No Yes
720P@(60/50) Yes No Yes
1080I@(60/50) Yes No Yes
1080P@(60/50) Yes No Yes
1080P@(24/25/30) Yes No Yes
480P/576P-RGB Yes Yes
720P@(60/50)-RGB Yes Yes
1080I@(60/50)-RGB No Yes
1080P@(60/50)-RGB Yes Yes
1080P@(24/25/30)-RGB No Yes
VGA@(60/67/72/75/85) Yes Yes
SVGA@(56/60/72/75) Yes Yes
XGA@(60/70/75) Yes Yes
SXGA@(60/75) Yes Yes
1280X960 Yes Yes
1600X900@60 Yes Yes
UXGA@60 ( 1600X1200 ) Yes Yes
WXGA@60(1280x800) Yes Yes
WXGA+@60(1440x900) Yes Yes
WXGA@60(1366x768) Yes Yes
SXGA+@60(1400x1050) Yes Yes
WSXGA@60(1680x1050) Yes Yes
WUXGA@60(1920x1200) Yes Yes
2K@50 ( 2048X1080) Yes Yes
2K@60 ( 2048X1080) Yes Yes

VP-438 - Technical Specifications 17

8 RS-232 Communication Protocol

The following is the COM port setting:

Baud Rate: 9600bps

Parity: None
Data Bits: 8 bits
Stop Bits: 1 bit
Set CTS Mode: Off
Set XON/XOFF: Off

The following table defines the symbol characters:

Symbol Meaning
 Space
[CR] Carriage Return, ASCII code 0x0D
[LF] Line Feed, ASCII code 0x0A

Set Command

Type in: YControl_TypeFunctionParam[CR]

When sending a command, a blank character may precede [CR] if desired.

Reply: ZControl_TypeFunctionParam[CR][LF]

Get Command:

Type in: YControl_TypeFunction[CR]

Reply: ZControl_TypeFunctionParam[CR][LF]

Example:

Example 1: set Brightness value to 32

Send: Y11632[CR]

Reply: Z11632[CR][LF]

18 VP-438 - RS-232 Communication Protocol

 Example 2: get current output resolution (2 = SVGA)

Send: Y421[CR]

Reply: Z4212[CR][LF]

The following table defines the RS-232 Protocol:

Control Param
Function Function Description Comment
Type (for Set)
0 0 N/A SIZE button on remote control
0 1 N/A POWER button on remote control
FREEZE button on remote
0 2 N/A
control
0 3 N/A 480p button on remote control
0 4 N/A 576p button on remote control
0 5 N/A 720p button on remote control
0 6 N/A 1080i button on remote control
0 7 N/A 1080p button on remote control
0 8 N/A VGA button on remote control
0 9 N/A SVGA button on remote control
0 10 N/A XGA button on remote control
0 11 N/A SXGA button on remote control
0 12 N/A WXGA button on remote control
0 13 N/A UXGA button on remote control
0 14 N/A INFO button on remote control
0 15 N/A UP button on remote control
0 16 N/A NATIVE button on remote control
LEFT button on remote Volume down when not in
0 17 N/A
control/Volume down OSD
0 18 N/A OK button on remote control
RIGHT button on remote Volume up when not in
0 19 N/A
control/Volume up OSD
0 20 N/A MENU button on remote control
0 21 N/A DOWN button on remote control
0 22 N/A EXIT button on remote control
0 23 N/A CV1 button on remote control
0 25 N/A COMP1 button on remote control
0 26 N/A HDMI1 button on remote control
0 27 N/A HDMI2 button on remote control
0 28 N/A COMP2 button on remote control
0 29 N/A PC 1 button on remote control
0 30 N/A BLANK button on remote control
0 31 N/A MUTE button on remote control
33 N/A Auto adjust FW V6.12
0 34 N/A CV2 button on remote control
0 35 N/A PC2 button on remote control
VP-438 - RS-232 Communication Protocol 19
 Control Param
Function Function Description Comment
Type (for Set)
0 36 N/A HDMI3 button on remote control
0 37 N/A HDMI4 button on remote control
1: Set
4 0~100 Color: Red
2: Get
1: Set
5 0~100 Color: Green
2: Get
1: Set
6 0~100 Color: Blue
2: Get
1: Set
16 0~100 Brightness
2: Get
1: Set
17 0~100 Contrast
2: Get
1: Set
25 0~100 Hue
2: Get
1: Set
26 0~100 Sharpness
2: Get
1: Set
29 0~100 Saturation
2: Get
For embedded HDMI inputs,
1: Set set an absolute volume for
33 0~100 this does not affect the
2: Get Output embedded output
For embedded HDMI inputs,
1: Set
34 0~100 set an absolute volume for Input this does not affect the
2: Get embedded output
1: Set
41 0~100 OSD Setting :H-Position
2: Get
1: Set
42 0~100 OSD Setting: V-Position
2: Get
1: Set
43 0~100 OSD Timeout
2: Get
1: Set
44 0~8 OSD Background
2: Get
0: Off
1: Set 1: Low
50 0~3 NR (Noise Reduction)
2: Get 2: Mid
3: High
0: Off
1: Set 1: 40ms
51 0~3 Audio delay
2: Get 2: 110ms
3: 150ms
0 : AUTOMATIC
1: Set
52 0~2 HDMI AUDIO IN 1 : EMBEDDED
2: Get
2 : ANALOG
1: Set 0 : OFF (FW:6.14)
84 0~1 Auto Sync Off
2: Get 1 : ON
1: Set 0: OFF
95 0 ~1 DROP LINE
2: Get 1: ON
1: Set 0 : OFF
160 0~1 HDCP ON INPUT
2: Get 1 : ON
1: Set 0 : Follow input
161 0~1 HDCP ON OUTPUT
2: Get 1 : Follow output
20 VP-438 - RS-232 Communication Protocol
 Control Param
Function Function Description Comment
Type (for Set)
1: CV1
2: CV2
3: COMP1
4: COMP2
3: Set 5: PC1
0 1~10 Select Input Source
4: Get 6:PC2
7: HDMI1
8: HDMI2
9: HDMI3
10: HDMI4
0: Full
1: Panscan
2: Overscan
3: Set
1 0~6 Size 3: Underscan1
4: Get
4: Letterbox
5: Underscan2
6. BEST FIT
0: Native
1: VGA
2: SVGA
3: XGA
4: SXGA
5: UXGA
6: 480i
7: 480p
8: 720p60
9: 1080i60
10: 1080p60
11: 576i
12: 576p
3: Set 13: 720p50
21 0~27 Output Resolution
4: Get 14: 1080i50
15: 1080p50
16: WXGA
17: WSXGA
18: WUXGA
19: 1280x800
20: WXGA+ (1440X900)
21: SXGA+ (1400X1050)
22: 1600x900 F/W 1.32
23: 480i59
24: 480p59
25: 720p59
26: 1080i59
27: 1080p59
3: Set 23 1 Factory Reset

VP-438 - RS-232 Communication Protocol 21

 Control Param
Function Function Description Comment
Type (for Set)
0: Un-known
1: VGA
2. SVGA
3: XGA
4: SXGA
5: UXGA
6: 480i
7: 480p
8: 720p60
9: 1080i60
10: 1080p60
11: 576i
4: Get 24 0~24 INPUT Resolution (V1.41) 12: 576p
13: 720p50
14: 1080i50
15: 1080p50
16: WXGA
17: WSXGA
18: WUXGA
19: 1280x800
20: WXGA+ (1440X900)
21: SXGA+ (1400X1050)
22: 1600X900
23: 2048X1080/50
24: 2048X1080/60
0: Power Down
6: Set
0 0~2 Power 1: Power On
7: Get
2: Firmware reset
6: Set 0: Off
1 0~1 Freeze
7: Get 1: On
6: Set 0: Off
2 0~1 Blank
7: Get 1: On
6: Set 0: Off
3 0~1 Mute
7: Get 1: On
6: Set 0: Off
4 0~1 Key lock
7: Get 1: On
6 : Set 0: Clear Auto Tune
140 0~1 Auto Tune (under fine tune)
7 : Get 1: Set Auto Tune

22 VP-438 - RS-232 Communication Protocol

For the latest information on our products and a list of Kramer distributors,
visit our Web site where updates to this user manual may be found.

We welcome your questions, comments, and feedback.

Web site: www.kramerelectronics.com
E-mail: info@kramerel.com

!
SAFETY WARNING
Disconnect the unit from the power
supply before opening and servicing

P/N: 2900- 000642 Rev: 8