Kramer VM-4HDT User Manual

USER MANUAL

MODEL:

VM-4HDT

1:4 HDMI to HDBT DA

P/N: 2900-300486 Rev 1

www.kramerAV.com

VM-4HDT – Contents

i

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 About HDBaseT™ Technology 5

3.2 Using Twisted Pair Cable for HDBT 5

3.3 Defining the VM-4HDT 1:4 HDMI to HDBT DA 6

4 Connecting the VM-4HDT 7
5 Operating the VM-4HDT 9

5.1 IR and RS-232 Signal Routing 9

5.2 Acquiring an EDID 13

6 Default EDID 14
7 Technical Specifications 16

7.1 Default Communication Parameters 16

8 Protocol 3000 17

8.1 Kramer Protocol 3000 Syntax 17

8.2 Kramer Protocol 3000 Commands 20

8.3 Kramer Protocol 3000 – Detailed Commands 20

Figures

Figure 1: VM-4HDT 1:4 HDMI to HDBT DA 6
Figure 2: Connecting the VM-4HDT 1:4 HDMI to HDBT DA 8
Figure 3: VM-4HDT DIP-Switches 9
Figure 4: VM-4HDT DIP-Switches Setup 10
Figure 5: IR/RS-232 Routing Example 12

VM-4HDT - Introduction

1

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 the video, audio, presentation, and broadcasting
professional 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 14 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; GROUP 11:
Sierra Video Products; GROUP 12: Digital Signage; GROUP 13: Audio; and
GROUP 14: Collaboration.

Congratulations on purchasing your Kramer VM-4HDT 1:4 HDMI to HDBT DA,
which is ideal for the following typical applications:

 Boardrooms and meeting rooms
 Presentation and multimedia applications
 Broadcast
 Rental and staging

2

VM-4HDT - Getting Started

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

Go to http://www.kramerav.com/downloads/VM-4HDT 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 neighbouring electrical appliances that may adversely

influence signal quality

 Position your Kramer VM-4HDT 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.

VM-4HDT - Getting Started

3

2.2 Safety Instructions

Caution:

There are no operator serviceable parts inside the unit

Warning:

Use only the Kramer Electronics input power wall
adapter that is provided with the unit

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/.

4

VM-4HDT - Overview

3 Overview

The Kramer MegaTOOLS® VM-4HDT is a high-quality 1:4 HDMI to HDBT DA that
takes one HDMI input, equalizes and reclocks the signal and distributes it to four
identical HDBT outputs. The VM-4HDT distributes signals having resolutions up to
4Kx2K and including WUXGA and 1080p.

In particular, the VM-4HDT features:

 A maximum data rate of 10.2Gbps (3.4Gbps per graphic channel)
 HDMI support for 3D, Deep Color, x.v.Color™, Lip Sync, HDMI

Uncompressed Audio Channels, Dolby TrueHD, DTS-HD, CEC (only for OUT

1)

 HDCP compliance (note that sources that support HDCP will output HDCP

protected content)

 Kramer Equalization & re-Klocking™ Technology that rebuilds the digital

signal integrity to travel longer distances

 I-EDIDPro™ Kramer Intelligent EDID Processing™, an intelligent EDID

handling and processing algorithm that ensures Plug and Play operation for
HDMI systems

 A default EDID for fast and efficient connection of the unit

The default EDID feature lets you connect the VM-4HDT without having to connect a
display to the output

 Support for EDID Designer via the USB port
 3D pass-through
 A 5V DC power source
 A MegaTOOLS® sized enclosure. two devices can be mounted in a 1U rack

space using the optional RK-T2B adapter

The VM-4HDT supports a range of up to 70m (230ft) at 2K resolutions and 40m
(130ft) at 4K resolutions (on shielded BC-HDKat6a cable).

VM-4HDT - Overview

5

3.1 About HDBaseT™ Technology

HDBaseT™ is an advanced all-in-one connectivity technology (supported by the
HDBaseT Alliance). It is particularly suitable in the ProAV – and also the home –
environment as a digital networking alternative, where it enables you to replace
numerous cables and connectors by a single LAN cable used to transmit, for
example, uncompressed full high-definition video, audio, IR, as well as various
control signals.

The products described in this user manual are HDBaseT certified.

3.2 Using Twisted Pair Cable for HDBT

Kramer engineers have developed special twisted pair cables to best match our
digital twisted pair products; BC−HDKat6a (CAT 6 23 AWG cable) significantly
outperforms regular CAT 5 / CAT 6 cables.

We strongly recommend that you use shielded twisted pair cable.

6

VM-4HDT - Overview

3.3 Defining the VM-4HDT 1:4 HDMI to HDBT DA

Figure 1 defines the VM-4HDT.

Figure 1: VM-4HDT 1:4 HDMI to HDBT DA

#

Feature

Function

1

PROGRAM Mini USB
Connector

Use to send RS-232 Commands (see Section 8.3).
Connect to a PC to perform firmware upgrades (via K-

Upload) and work with the EDID Designer.
K-Upload and EDID Designer can be downloaded from

our Web site at:

http://www.kramerav.com/manual/EDID Designer

2

EDID SETUP Button

Press to capture the input EDID or select the default EDID
(see Section 5)

3

IN LED

Lights when an active input signal is detected

4

LINK LEDs

Lights when a link is established with the receiver
(from 1 to 4)

5

OUTPUT LEDs

Lights when an active output acceptor is detected
(from 1 to 4)

6

ON LED

Lights when the unit receives power

7

INPUT HDMI
Connector

Connects to the HDMI source

8

HDBT OUT
Connectors

Connect to an HDBT acceptor (from 1 to 4), for example
TP-580R

9

IR 3.5mm Mini Jack

Connect to the remote IR sensor/emitter

10

RS-232 CONTROL 3­pin Terminal Block

Connect to the serial controller to send RS-232 data to
remote receiver

11

SETUP 8-way
DIP-switch

Used to set the IR and RS-232 commands behavior, (see

Section 5.1.1)

12

SETUP 4-way
DIP-switch

For future use
13

5V DC Connector

Connects to the 5V DC power supply

VM-4HDT - Connecting the VM-4HDT

7

4 Connecting the VM-4HDT

Always switch off the power to each device before connecting it to your
VM-4HDT. After connecting your VM-4HDT, connect its power and then
switch on the power to each device.

Connect the VM-4HDT as illustrated in the example in Figure 2:

1. Connect an HDMI input source (for example, a BluRay disk player) to the
HDMI IN connector.

2. Connect the four HDBT outputs to up to four HDBT receivers (for example,
The TP-580R and the TP-588D).

Note that If a mac is connected as a source and a non-HDCP is connected
as the acceptor, the signal will not pass.

3. Connect the 5V DC power adapter to the power socket unit and then
connect the adapter to the mains electricity (not shown in Figure 2).
The ON LED lights.

8

VM-4HDT - Connecting the VM-4HDT

Figure 2: Connecting the VM-4HDT 1:4 HDMI to HDBT DA

VM-4HDT - Operating the VM-4HDT

9

5 Operating the VM-4HDT

This section describes how IR and RS-232 signals are routed (see Section 5.1)
and how to acquire the EDID (see Section 5.2).

5.1 IR and RS-232 Signal Routing

The VM-4HDT can send or receive IR and RS-232 commands via the four HDBT
output ports.

Each signal can pass commands from the VM-4HDT to a single output, several
outputs or all of the outputs or the other way around, from the output/s to the
VM-4HDT.

The IR/RS-232 signal routing is set via the SETUP DIP-switches (see

Section 5.1.1)

5.1.1 Setting the DIP-Switches

Figure 3 defines the SETUP DIP-Switches:

Figure 3: VM-4HDT DIP-Switches

The setup is defined in the table below:

Output #

IR Routing is enabled when:

RS-232 Routing is enabled when:

OUT 1

DIP 1 – OFF

DIP 5 – OFF

OUT 2

DIP 2 – OFF

DIP 6 – OFF

OUT 3

DIP 3 – OFF

DIP 7 – OFF

OUT 4

DIP 4 – OFF

DIP 8 – OFF

10

VM-4HDT - Operating the VM-4HDT

For example, in the DIP-switch setup shown in Figure 4, DIPs 1, 4, 7 and 8 are set
to OFF. This means that IR signals can be transferred through channels 1 and 4
and RS-232 commands can be passed via channels 3 and 4. All the other
channels are set to ON and are therefore disabled.

Figure 4: VM-4HDT DIP-Switches Setup

5.1.2 Signal Routing

The example in Figure 5 shows the VM-4HDT connected to four TP-580R devices.
The table below summarizes the types of connections:

Output #

HDMI OUT:

INPUT

IR

RS-232

VM-4HDT

BluRay
Disk player

Emitter

PC
TP-580R (1)

Display

Sensor

TP-580R (2)

Display

Sensor

TP-580R (3)

Projector

Sensor

Projector

TP-580R (4)

Projector

Sensor

Projector

IR signal Routing

To route the IR signal you have to use the Kramer external IR sensor on one end
(P/N: 95-0104050) and the Kramer IR emitter cable on the other end
(P/N: C-A35/IRE-10). Note that two IR Emitter Extension Cables are available: a
15 meter cable and a 20 meter cable

In this example, an IR emitter is connected to the streamer and IR sensors are
connected to all the TP-580R devices. This setup lets you remotely control the
streamer via any of the receiver devices using the streamer’s IR remote control
transmitter.

VM-4HDT - Operating the VM-4HDT

11

RS-232 Signal Routing

A laptop can be used to control the product via mini USB port and K-TOUCH can
be used to send RS-232 commands over HDBaseT to the remote connected
device.

In this example, a laptop is connected to the RS-232 terminal block connector on
the VM-4HDT and the RS-232 ports on TP-580R (3) and TP-580R (4) are
connected to the projector. This type of setup allows you to control the Projectors.

RS-232 commands are sent to both projectors:

 If they are of the same model (for example, both are Projector A), both will

respond to these commands

 If they are not of the same make (Projector A and Projector B) The

Projector A commands will affect only Projector A and will be ignored by
Projector B

In the same way, if the RS-232 are also connected to the displays on TP-580R (1)
and TP-580R (2) they can also receive specific commands each, which will be
ignored by devices of a different make.

12

VM-4HDT - Operating the VM-4HDT

Figure 5: IR/RS-232 Routing Example

VM-4HDT - Operating the VM-4HDT

13

5.2 Acquiring an EDID

To acquire an EDID, press the EDID SETUP button as follows:

1. The first press of the EDID SETUP button displays the present EDID status
similar to that shown in the next step.

2. The second press of EDID SETUP enters the read mode and each
additional press cycles through the source options:
OUT 1 -> OUT 2 -> OUT 3 -> OUT 4 -> all LEDs flash for a default EDID.

3. When the desired EDID source is reached, release the EDID SETUP button.
The VM-4HDT reads the EDID for a few seconds. When finished, all LEDS
return to display the present output connection status.

Note that if an unconnected output is chosen or the EDID cannot be read,
the VM-4HDT loads the default EDID

Note that VM-4HDT Supports EDID Designer (via the mini USB port) that
can be loaded from our Web site: Kramer EDID Designer

Note that in order to use the mini USB port, you need to download and the
Kramer USB driver from our Web site at:

http://www.kramerelectronics.com/support/product_downloads.asp and

install it

5.2.1 Forcing the RGB Mode

If you want to force the EDID, that the source is seeing, to support only RGB color
space, press and hold the EDID button until all the output LEDs flash together,
and then read the desired EDID.

To return to the normal mode press and hold the EDID button until the output
LEDs light together and then read the desired EDID.

14

VM-4HDT - Default EDID

6 Default EDID

Model name............... VM-4HDT

Manufacturer............. KMR

Plug and Play ID......... KMR0672

Data string.............. Default-EDID

Serial number............ 2

Manufacture date......... 2012, ISO week 255

Filter driver............ None

-------------------------

EDID revision............ 1.3

Input signal type........ Digital

Color bit depth.......... Undefined

Display type............. RGB color

Screen size.............. 520 x 320 mm (24.0 in)

Power management......... Standby, Suspend, Active off/sleep

Extension blocs.......... 1 (CEA-EXT)

-------------------------

DDC/CI................... Not supported

Color characteristics

Default color space...... Non-sRGB

Display gamma............ 2.20

Red chromaticity......... Rx 0.674 - Ry 0.319

Green chromaticity....... Gx 0.188 - Gy 0.706

Blue chromaticity........ Bx 0.148 - By 0.064

White point (default).... Wx 0.313 - Wy 0.329

Additional descriptors... None
Timing characteristics

Horizontal scan range.... 30-83kHz

Vertical scan range...... 56-76Hz

Video bandwidth.......... 170MHz

CVT standard............. Not supported

GTF standard............. Not supported

Additional descriptors... None

Preferred timing......... Yes

Native/preferred timing.. 1280x720p at 60Hz (16:9)

Modeline............... "1280x720" 74.250 1280 1390 1430 1650 720 725 730 750 +hsync +vsync

Standard timings supported
720 x 400p at 70Hz - IBM VGA
640 x 480p at 60Hz - IBM VGA
640 x 480p at 75Hz - VESA
800 x 600p at 60Hz - VESA
800 x 600p at 75Hz - VESA
1024 x 768p at 60Hz - VESA
1024 x 768p at 75Hz - VESA
1280 x 1024p at 75Hz - VESA
1280 x 1024p at 60Hz - VESA STD
1600 x 1200p at 60Hz - VESA STD
1152 x 864p at 75Hz - VESA STD

EIA/CEA-861 Information

Revision number.......... 3

IT underscan............. Supported

Basic audio.............. Supported

YCbCr 4:4:4.............. Supported

YCbCr 4:2:2.............. Supported

Native formats........... 1

Detailed timing #1....... 1920x1080p at 60Hz (16:9)

Modeline............... "1920x1080" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync

Detailed timing #2....... 1920x1080i at 60Hz (16:9)

Modeline............... "1920x1080" 74.250 1920 2008 2052 2200 1080 1084 1094 1124 interlace +hsync

+vsync

Detailed timing #3....... 1280x720p at 60Hz (16:9)

Modeline............... "1280x720" 74.250 1280 1390 1430 1650 720 725 730 750 +hsync +vsync

Detailed timing #4....... 720x480p at 60Hz (16:9)

Modeline............... "720x480" 27.000 720 736 798 858 480 489 495 525 -hsync -vsync

VM-4HDT - Default EDID

15

CE video identifiers (VICs) - timing/formats supported
1920 x 1080p at 60Hz - HDTV (16:9, 1:1)
1920 x 1080i at 60Hz - HDTV (16:9, 1:1)
1280 x 720p at 60Hz - HDTV (16:9, 1:1) [Native]
720 x 480p at 60Hz - EDTV (16:9, 32:27)
720 x 480p at 60Hz - EDTV (4:3, 8:9)
720 x 480i at 60Hz - Doublescan (16:9, 32:27)
720 x 576i at 50Hz - Doublescan (16:9, 64:45)
640 x 480p at 60Hz - Default (4:3, 1:1)
NB: NTSC refresh rate = (Hz*1000)/1001

CE audio data (formats supported)
LPCM 2-channel, 16/20/24 bit depths at 32/44/48 kHz

CE vendor specific data (VSDB)
IEEE registration number. 0x000C03

CEC physical address..... 1.0.0.0

Maximum TMDS clock....... 165MHz

CE speaker allocation data

Channel configuration.... 2.0

Front left/right......... Yes

Front LFE................ No

Front center............. No

Rear left/right.......... No

Rear center.............. No

Front left/right center.. No
Rear left/right center... No

Rear LFE................. No

Report information

Date generated........... 11/11/2014

Software revision........ 2.60.0.972

Data source.............. Real-time 0x0032

Operating system......... 6.1.7601.2.Service Pack 1

16

VM-4HDT - Technical Specifications

7 Technical Specifications

INPUT:

1 HDMI connector

OUTPUTS:

4 HDBT connectors

MAX. DATA RATE:

10.2Gbps ( 3.4Gbps per graphic channel)

MAX. RESOLUTION:

4K@30Hz and 4K@60Hz 4:2:0

COMPLIANCE WITH HDMI
STANDARD:

Supports HDMI and HDCP

CONTROLS:

EDID Setup button

INDICATOR LEDs:

OUTPUTS 1 to 4, LINK 1 to 4, IN

OPERATING TEMPERATURE:

0° to +40°C (32° to 104°F)

STORAGE TEMPERATURE:

-40° to +70°C (-40° to 158°F)

HUMIDITY:

10% to 90%, RHL non-condensing

POWER CONSUMPTION:

5V DC, 3.2A

DIMENSIONS:

18.8cm x 11.5cm x 2.9cm (7.4" x 4.53" x 1.15") W, D, H

WEIGHT:

0.46kg (1.01lb)

ACCESSORIES:

Power supply

OPTIONS:

RK-T2B 19” rack adapter

Specifications are subject to change without notice at http://www.kramerelectronics.com

7.1 Default Communication Parameters

RS-232

Baud Rate:

115,200

Data Bits:

8

Stop Bits:

1

Parity:

None

Factory Reset

Protocol 3000

FACTORY command to reset to factory default configuration

RS-232

Command Format:

ASCII protocol 3000

Example (Route the video HDMI input to the output ports):

#ROUTE 1,1,2<cr>

VM-4HDT - Protocol 3000

17

8 Protocol 3000

The VM-4HDT can be operated using serial commands from a PC, remote
controller, or touch screen. The unit communicates using the default Kramer
Protocol 3000.

This section describes:

 Kramer Protocol 3000 syntax (see Section 8.1)
 Kramer Protocol 3000 commands (see Section 8.2)
 Kramer Protocol 3000 detailed commands (See Section 8.3)

8.1 Kramer Protocol 3000 Syntax

8.1.1 Host Message Format

Start

Address (optional)

Body

Delimiter

#

device_id@

Message

CR

8.1.1.1 Simple Command

Command string with only one command without addressing:

Start

Body

Delimiter

#

Command SP Parameter_1,Parameter_2,…

CR

8.1.1.2 Command String

Formal syntax with commands concatenation and addressing:

Start

Address (optional)

Body

Delimiter

#

device_id@

Command_1 Parameter1_1,Parameter1_2,…|
Command_2 Parameter2_1,Parameter2_2,…|
Command_3
Parameter3_1,Parameter3_2,…|…

CR

8.1.2 Device Message Format

Start

Address (optional)

Body

Delimiter

#

device_id@

Message

CR LF

18

VM-4HDT - Protocol 3000

8.1.2.1 Device Long Response

Echoing command:

Start

Address (optional)

Body

Delimiter

~

device_id@

Command SP [Param1 ,Param2 …] result

CR LF

CR = Carriage return (ASCII 13 = 0x0D)
LF = Line feed (ASCII 10 = 0x0A)
SP = Space (ASCII 32 = 0x20)

8.1.3 Command Terms

Command

A sequence of ASCII letters ('A'-'Z', 'a'-'z' and '-').
Command and parameters must be separated by at least one space.

Parameters
A sequence of alphanumeric ASCII characters ('0'-'9','A'-'Z','a'-'z' and some special
characters for specific commands). Parameters are separated by commas.

Message string
Every command entered as part of a message string begins with a message

starting character and ends with a message closing character.
Note: A string can contain more than one command. Commands are separated by

a pipe ( '|' ) character.

Message starting character
'#' – For host command/query
'~' – For device response

Device ID (Optional, for K-NET)
K-NET Device ID followed by '@'

Query sign
'?' follows some commands to define a query request.

Message closing character
CR – For host messages; carriage return (ASCII 13)
CRLF – For device messages; carriage return (ASCII 13) + line-feed (ASCII 10)

VM-4HDT - Protocol 3000

19

Command chain separator character

When a message string contains more than one command, a pipe ( '|' ) character
separates each command.

Spaces between parameters or command terms are ignored.

8.1.4 Entering Commands

You can directly enter all commands using a terminal with ASCII communications
software, such as HyperTerminal, Hercules, etc. Connect the terminal to the serial
or Ethernet port on the Kramer device. To enter CR press the Enter key.
( LF is also sent but is ignored by command parser).

For commands sent from some non-Kramer controllers like Crestron, some
characters require special coding (such as, /X##). Refer to the controller manual.

8.1.5 Command Forms

Some commands have short name syntax in addition to long name syntax to allow
faster typing. The response is always in long syntax.

8.1.6 Chaining Commands

Multiple commands can be chained in the same string. Each command is

delimited by a pipe character (“|”). When chaining commands, enter the message
starting character and the message closing character only once, at the

beginning of the string and at the end.

Commands in the string do not execute until the closing character is entered.

A separate response is sent for every command in the chain.

8.1.7 Maximum String Length

64 characters

20

VM-4HDT - Protocol 3000

8.2 Kramer Protocol 3000 Commands

Command

Description

Permission

#

Protocol handshaking

End User

BUILD-DATE?

Read device build date

End User

CPEDID

Copy EDID data from the output to the
input EEPROM

End User
DISPLAY?

Read if output is valid

End User

FACTORY

Reset to factory default configuration

GEDID

Read EDID data

User SW Internal

HELP

List of commands

End User

MODEL?

Read device model

End User

NAME?

PROT-VER?

Read device protocol version

End User

RESET

Reset device

Administrator

SIGNAL?

Read if input is valid

End User

SN?

Read device serial number

End User

Note that the some of the following commands differ from the Kramer
standard protocol commands.

8.3 Kramer Protocol 3000 – Detailed Commands

This section describes the detailed commands list.

Command - BUILD-DATE

Command Type - System-mandatory

Command Name

Permission

Transparency

Set: - -

-

Get:

BUILD-DATE?

End User

Public

Description

Syntax

Set:

Get device build date

#BUILD-DATE␍

Get:

-

-

Response

~nn@BUILD-DATE␠ date␠time␍␊

Parameters

date - Format: YYYY/MM/DD where YYYY = Year, MM = Month, DD = Day
time - Format: hh:mm:ss where hh = hours, mm = minutes, ss = seconds

VM-4HDT - Protocol 3000

21

Command - CPEDID

Command Type - System

Command Name

Permission

Transparency

Set:

CPEDID

End User

Public

Get:

- - -

Description

Syntax

Set:

Copy EDID data from the output to
the input EEPROM

#CPEDID␠

output_id, input_id

␍

Get:

-

-

Response

~nn@CPEDID␠ output_id, input_id ␍␊

Parameters

output_id – Video output id
input_id – Video input id

Response Triggers

Response is sent to the com port from which the Set was received (before execution)

Command - DISPLAY?

Command Type - System

Command Name

Permission

Transparency

Set: - - - Get

DISPLAY?

End User

Public

Description

Syntax

Set: - -

Get:

Get output HPD status

#DISPLAY?␠out_id␍

Response

~ nn@DISPLAY␠out_id,status ␍␊

Parameters

out_id - output number
status - HPD status according to signal validation – 0: Signal or sink is not valid, 1: Signal or sink is

valid

Response Triggers

After execution, response is sent to the com port from which the Get was received
Response is sent after every change in output HPD status ON to OFF
Response is sent after every change in output HPD status OFF to ON and ALL parameters (new EDID,

etc.) are stable and valid

22

VM-4HDT - Protocol 3000

Command – FACTORY

Command Type – System-mandatory

Command Name

Permission

Transparency

Set:

FACTORY

End User

-

Get:

-

-

-

Description

Syntax

Set:

Reset device to factory defaults configuration

#FACTORY␍

Get :

-

-

Response

~nn @FACTORY␠ OK␍␊

Notes

This command deletes all user data from the device. The deletion can take some time.

Command - GEDID

Command Type - System

Command Name

Permission

Transparency

Get:

GEDID

End User

Public

Description

Syntax

Get:

Read EDID data

#GEDID␠eeprom_id ␍

Response

Multi line response:
~nn@GEDID␠ eeprom_id,size␍␊
EDID_data␍␊
~nn@GEDID␠ eeprom_id ␠OK␍␊

Parameters

eeprom_id – EEPROM to get the EDID from
size – Device sends this parameter in response. Size of EDID that will print.
edid_data – EDID data as stream of bytes.

Response Triggers

Response is sent to the com port from which the Set (before execution) / Get command was received

Notes

For Get, size=0 means EDID is not supported
For old devices that do not support this command, ~nn@ ERR 002␍␊ is received

VM-4HDT - Protocol 3000

23

Command - HELP

Command Type - System-mandatory

Command Name

Permission

Transparency

Set: - - - Get:

HELP

End User

Public

Description

Syntax

Set:

-

-

Get:

Get command list or help for specific
command

2 options:

1. #HELP␍

2. #HELP␠command_name␍

Response

1. Multi-line: ~nn@Device available protocol 3000 commands:␍␊command,␠command…␍␊
To get help for command use: HELP (COMMAND_NAME)␍␊

2. Multi-line: ~nn@HELP␠ command: ␍␊description␍␊USAGE:usage ␍␊

Command - NAME

Command Type - System (Ethernet)

Command Name

Permission

Transparency

Set:

NAME

Administrator

Public

Get:

NAME?

End User

Public

Description

Syntax

Set:

Set machine (DNS) name

#NAME␠machine_name␍

Get:

Get machine (DNS) name

#NAME?␍

Response

Set: ~nn@NAME␠machine_name␍␊
Get: ~nn@NAME?␠ machine_name␍␊

Parameters

machine_name - String of up to 15 alpha-numeric chars (can include hyphen, not at the beginning or
end)

Notes

The machine name is not the same as the model name. The machine name is used to identify a
specific machine or a network in use (with DNS feature on)

Command – MODEL?

Command Type – System-mandatory

Command Name

Permission

Transparency

Set: - - - Get:

MODEL?

End User

-

Description

Syntax

Set:

-

-

Get :

Get device model

#MODEL?␍

Response

~nn @MODEL␠ model_name␍␊

Parameters

model_name – String of up to 19 printable ASCII chars

24

VM-4HDT - Protocol 3000

Command - PROT-VER?

Command Type - System-mandatory

Command Name

Permission

Transparency

Set: - - - Get:

PROT-VER?

End User

Public

Description

Syntax

Set:

-

-

Get:

Get device protocol version

#PROT-VER?␍

Response

~nn@PROT-VER␠ 3000:version␍␊

Parameters

Version - XX.XX where X is a decimal digit

Command - RESET

Command Type - System-mandatory

Command Name

Permission

Transparency

Set:

RESET

Administrator

Public

Get:

-

-

-

Description

Syntax

Set:

Reset device

#RESET␍

Get:

-

-

Response

~nn@RESET␠ OK␍␊

Notes

To avoid locking the port due to a USB bug in Windows, disconnect USB connections immediately
after running this command. If the port was locked, disconnect and reconnect the cable to reopen the
port.

Command - SIGNAL

Command Type - System

Command Name

Permission

Transparency

Set: - - - Get

SIGNAL?

End User

Public

Description

Syntax

Set: - -

Get:

Get input signal lock status

#SIGNAL?␠inp_id␍

Response

~ nn@SIGNAL␠ inp_id,status ␍␊

Parameters

inp_id - input number
status - lock status according to signal validation – 0: Signal or sink is not valid, 1: Signal or sink is valid

Response Triggers

After execution, a response is sent to the com port from which the Get was received
Response is sent after every change in input signal status ON to OFF, or OFF to ON

VM-4HDT - Protocol 3000

25

Command - SN?

Command Type - System-mandatory

Command Name

Permission

Transparency

Set: - - - Get:

SN?

End User

Public

Description

Syntax

Set:

-

-

Get:

Get device serial number

#SN?␍

Response

~nn@SN␠serial_number␍␊

Parameters

serial_number - 11 decimal digits, factory assigned

Notes

For new products with 14 digit serial numbers, use only the last 11 digits

8.3.1 Packet Protocol Structure

The packet protocol is designed to transfer large amounts of data, such as files, IR
commands, EDID data, and so on.

8.3.1.1 Using the Packet Protocol

To use the packet protocol:

4. Send a command: LDEDID

5. Receive Ready or ERR###

6. If Ready:

 Send a packet
 Receive OK on the last packet
 Receive OK for the command

7. Packet structure:

 Packet ID (1, 2, 3…) (2 bytes in length)
 Length (data length + 2 for CRC) - (2 bytes in length)
 Data (data length -2 bytes)
 CRC - 2 bytes

26

VM-4HDT - Protocol 3000

01

02

03

04

05…

Packet ID

Length

Data

CRC

8. Response:

~NNNNSPOKCR LF

Where NNNN is the received packet ID in ASCII hex digits.

8.3.1.2 Calculating the CRC

The polynomial for the 16-bit CRC is:
CRC-CCITT: 0x1021 = x16 + x12 + x5 + 1
Initial value: 0000
Final XOR Value: 0

For a code example, see:

http://sanity-free.org/133/crc_16_ccitt_in_csharp.html

CRC example:
Data = “123456789”
Result => 0x31C3

1

SAFETY WARNING

Disconnect the unit from the power supply before opening and servicing

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.

www.kramerAV.com
[email protected]

P/N:

2900-300486

Rev:

1