Kramer VM-24HDMI User manual

Kramer Electronics, Ltd.
USER MANUAL
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
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Model:
VM-24HDMI
2 Input 1:4 HDMI Distributor

Contents
i
Contents
1 Introduction 1
2 Getting Started 1
2.1 Quick Start 2
3 Overview 3
3.1 About HDMI 3
3.2 Defining EDID 4
3.3 Recommendations for Best Performance 5
4 Your VM-24HDMI 2 Input 1:4 HDMI Distributor 5
4.1 Using the IR Transmitter 7
5 Installing in a Rack 8
6 Using the VM-24HDMI 9
6.1 Connecting the VM-24HDMI 9
6.2 Controlling via RS-232 (for example, using a PC) 11
6.3 Operating the VM-24HDMI 11
6.4 Using the EDID Buttons 12
6.4.1 Acquiring / Changing the EDID from One Output 12
6.4.2 Acquiring the Default EDID 13
6.4.3 Acquiring the Auto-mix EDID from the Connected Outputs 13
7 Technical Specifications 14
8 Communication Protocol 15
Figures
Figure 1: VM-24HDMI 2 Input 1:4 HDMI Distributor 6
Figure 2: Connecting a VM-24HDMI 2 Input 1:4 HDMI Distributor 10
Figure 3: Connecting a PC without using a Null-modem Adapter 11
Tables
Table 1: VM-24HDMI 2 Input 1:4 HDMI Distributor Features 7
Table 2: The EDID Modes 12
Table 3: VM-24HDMI Technical Specifications 14
Table 4: Protocol Definitions 15
Table 5: Instruction Codes for Protocol 2000 16

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 11 groups
1
that are clearly defined
by function.
Congratulations on purchasing your Kramer VM-24HDMI 2 Input 1:4
HDMI
2
Distributor!Each machine is ideal for:
Home theater, presentation and multimedia applications
Rental and staging
The package includes the following items:
VM-24HDMI
Power cord
This user manual
3
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
Use Kramer high performance high resolution cables
4
1 GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix Switchers; 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 Products
2 High-Definition Multimedia Interface
3 Download up-to-date Kramer user manuals from the Internet at this URL: http://www.kramerelectronics.com
4 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Getting Started
2
2.1 Quick Start
This quick start chart summarizes the basic setup and operation:

Overview
3
3 Overview
Each high quality HDMI Distributor accepts one of two HDMI inputs, and
distributes the selected signal to four outputs.
The VM-24HDMI:
Supports up to 2.25Gbps bandwidth per graphic channel
1
Has the ability to read and store, in non-volatile memory
2
, the EDID
3
block
from an output display device, so it can then provide the EDID information
to the HDMI source even if the display device is not connected
Lets you acquire the EDID from one output, from several connected
outputs (Auto-mix) or acquire the default EDID for fast and efficient
connection of the unit
4
Is housed in a 19" 1U rack mountable enclosure and is fed from a 100-240
VAC universal switching power supply
Control the VM-24HDMI via:
The front panel buttons
The infrared remote control transmitter
The infrared remote extension cable transmitter, see section 4.1
RS-232 serial commands transmitted by a touch screen system, PC, or
other serial controller
3.1 About HDMI
High-Definition Multimedia Interface (HDMI) is an uncompressed all-digital
5
audio/video interface, widely supported in the entertainment and home cinema
industry. It delivers the highest high-definition image and sound quality.
1 Suitable for resolutions up to UXGA at 60Hz, and for all HD resolutions
2 While the machine is ON
3 EDID is Extended Display Identification Data (see section 3.1 for a detailed definition)
4 Lets you use the EDID default value when no display from which to read the EDID is connected
5 Ensuring an all-digital rendering of video without the losses associated with analog interfaces and their unnecessary digital-
to-analog conversions

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Overview
4
In particular, HDMI
1
:
Provides a simple
2
interface between any audio/video source, such as a
set-top box, DVD player, or A/V receiver and video monitor, such as a
digital flat LCD / plasma television (DTV), over a single lengthy
3
cable
Supports standard, enhanced, high-definition video, and multi-channel
digital audio
4
on a single cable
Transmits all ATSC HDTV standards and supports 8-channel digital
audio, with bandwidth to spare to accommodate future enhancements and
requirements
Benefits consumers by providing superior, uncompressed digital video
quality via a single cable
5
, and user-friendly connector
Is backward-compatible with DVI (Digital Visual Interface)
Supports two-way communication between the video source (such as a
DVD player) and the digital television, enabling new functionality such
as automatic configuration and one-button play
Has the capacity to support existing high-definition video formats (720p,
1080i, and 1080p/60), as well as standard definition formats such as
NTSC or PAL
3.2 Defining EDID
The Extended Display Identification Data (EDID
6
) is a data-structure,
provided by a display, to describe its capabilities to an HDMI source. The
EDID enables the VM-24HDMI to “know” what kind of monitor is
connected to the output. The EDID includes the manufacturer’s name, the
product type, the timing data supported by the display, the display size,
luminance data and (for digital displays only) the pixel mapping data.
1 HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI
licensing LLC
2 With video and multi-channel audio combined into a single cable, the cost, complexity, and confusion of multiple cables
currently used in A/V systems is reduced
3 HDMI technology has been designed to use standard copper cable construction at up to 15m
4 HDMI supports multiple audio formats, from standard stereo to multi-channel surround-sound. HDMI has the capacity to
support Dolby 5.1 audio and high-resolution audio formats
5 HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video formats in a
simple, cost-effective manner
6 Defined by a standard published by the Video Electronics Standards Association (VESA)

Your VM-24HDMI 2 Input 1:4 HDMI Distributor
5
3.3 Recommendations for Best Performance
To achieve the best performance:
Connect only good quality connection cables, thus avoiding interference,
deterioration in signal quality due to poor matching, and elevated noise
levels (often associated with low quality cables)
Avoid interference from neighboring electrical appliances and position
your VM-24HDMI away from moisture, excessive sunlight and dust
4 Your VM-24HDMI 2 Input 1:4 HDMI Distributor
Figure 1 illustrates the VM-24HDMI and Table 1 defines the front and rear
panels.

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your VM-24HDMI 2 Input 1:4 HDMI Distributor
6
Figure 1: VM-24HDMI 2 Input 1:4 HDMI Distributor

Your VM-24HDMI 2 Input 1:4 HDMI Distributor
7
Table 1: VM-24HDMI 2 Input 1:4 HDMI Distributor Features
# Feature Function
1 IR Receiver The red LED is illuminated when receiving signals from the Kramer
infrared remote control transmitter
2 POWER Switch Illuminated switch for turning the unit ON or OFF
3 IN 1 Button
1
Press to select source 1 and distribute this signal to the outputs
4 SELECT IN 2 Button
1
Press to select source 2 and distribute this signal to the outputs
5 READ
2
Press, after pressing the EDID SELECT button, to acquire the EDID
Press to show the EDID status
6
EDID Buttons
SELECT Select the EDID mode (One Output, Auto-mix or Default)
7 OUTPUT STATUS LEDs LEDs light when an output(s) is connected and active; LEDs blink to
indicate the type of EDID acquired (see section 6.4) or when
connecting a non-HDCP display while providing HDCP content to
the VM-24HDMI
8 INPUT 1 HDMI Connector Connects to the HDMI source 1
9 INPUT 2 HDMI Connector Connects to the HDMI source 2
10 OUTPUT HDMI Connectors Connects to the HDMI acceptor (from 1 to 4)
11 RS-232 9-pin D-sub Port Connects to the PC or the Remote Controller
3
12 REMOTE IR Opening
4
Connects to an external IR receiver unit for controlling the machine
via an IR remote controller instead of using the front panel IR
receiver
5
13 Power Connector with Fuse AC connector enabling power supply to the unit
4.1 Using the IR Transmitter
You can use the RC-IR2 IR transmitter to control the machine via the built-in
IR receiver on the front panel or, instead, via an optional external IR
receiver
6
. The external IR receiver can be located 15 meters away from the
machine. This distance can be extended to up to 60 meters when used with
three extension cables
7
.
Before using the external IR receiver, be sure to arrange for your Kramer
dealer to insert the internal IR connection cable
8
with the 3.5mm connector
that fits into the REMOTE IR opening on the rear panel.
Connect the external IRreceiver to the REMOTE IR 3.5mm connector.
1 Illuminates when selected and there is a signal
2 Illuminates when configuring the EDID
3 Via a null-modem connection
4 Covered by a cap. The 3.5mm connector at the end of the internal IR connection cable fits through this opening
5 Optional. Can be used instead of the front panel (built-in) IR receiver to remotely control the machine (only if the internal
IR connection cable has been installed)
6 Model: C-A35M/IRR-50
7 Model: C-A35M/A35F-50
8 P/N: 505-70434010-S

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Installing in a Rack
8
5 Installing in a Rack
This section describes what to do before installing in a rack and how to rack
mount.
Before Installing in a Rack How to Rack Mount
Before installing in a rack, be sure that the environment is
within the recommended range:
Operating temperature range +5°to +45°C (41°to 113°F)
Operating humidity range 10 to 90% RHL, non-condensing
Storage temperature range -20°to +70°C (-4°to 158°F)
Storage humidity range 5 to 95% RHL, non-condensing

CAUTION!!
When installing in a 19" rack, avoid hazards by taking
care that:
1. It is located within the recommended environmental
conditions, as the operating ambient temperature of a
closed or multi unit rack assembly may exceed the
room ambient temperature.
2. Once rack mounted, enough air will still flow around
the machine.
3. The machine is placed straight in the correct
horizontal position.
4. You do not overload the circuit(s). When connecting
the machine to the supply circuit, overloading the
circuits might have a detrimental effect on overcurrent
protection and supply wiring. Refer to the appropriate
nameplate ratings for information. For example, for
fuse replacement, see the value printed on the
product label.
5. The machine is earthed (grounded) in a reliable way
and is connected only to an electricity socket with
grounding. Pay particular attention to situations where
electricity is supplied indirectly (when the power cord
is not plugged directly into the socket in the wall), for
example, when using an extension cable or a power
strip, and that you use only the power cord that is
supplied with the machine.
To rack-mount a machine:
1. Attach both ear brackets to the
machine. To do so, remove the
screws from each side of the
machine (3 on each side), and
replace those screws through the
ear brackets.
2. Place the ears of the machine
against the rack rails, and insert the
proper screws (not provided)
through each of the four holes in the
rack ears.
Note that:
In some models, the front panel
may feature built-in rack ears
Detachable rack ears can be
removed for desktop use
Always mount the machine in the
rack before you attach any cables
or connect the machine to the
power
If you are using a Kramer rack
adapter kit (for a machine that is not
19"), see the Rack Adapters user
manual for installation instructions
(you can download it at:
http://www.kramerelectronics.com)