Kramer VM-1H4C User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
VM-1H4C
1:4 HDMI Over CAT 5 DA
P/N: 2900-300133 Rev 2

VM-1H4C – Contents i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Shielded Twisted Pair 2
2.3 About the Power Provision Feature 3
2.4 Defining EDID 3
2.5 About HDMI—General Description 4
3Overview 5
4Defining the VM-1H4C 1:4 HDMI Over CAT 5 DA 6
5Connecting the VM-1H4C 7
6Acquiring the EDID 8
7Wiring the Twisted Pair RJ-45 Connectors 9
8Technical Specifications 10
9Default EDID 11
Figures
UFigure 1: VM-1H4C 1:4 HDMI Over CAT 5 DA Front and Rear PanelsU6
UFigure 2: Connecting the VM-1H4CU7
UFigure 3: TP Pinout WiringU9

VM-1H4C – 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 that are clearly defined
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers
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 and
GROUP 11: Sierra Products.
Thank you for purchasing the Kramer VM-1H4C 1:4 HDMI Over CAT 5 DA which
is ideal for:
•Home theater, presentation and multimedia applications
•Rental and staging

2
VM-1H4C – 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
•Use Kramer high performance high resolution cables
Go to http://www.kramerelectronics.com to check for up-to-date
user manuals, application programs, and to check if firmware
upgrades are available (where appropriate).
Caution: 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
2.1 Achieving the Best Performance
To achieve the best performance:
•Use only good quality connection cables to avoid 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 that may adversely
influence signal quality
•Position your Kramer VM-1H4C away from moisture, excessive sunlight and
dust
2.2 Shielded Twisted Pair
Kramer engineers have developed special shielded twisted pair cables to best
match our digital twisted pair products; the Kramer: BC-DGKat524 (CAT 5 24
AWG), the Kramer BC-DGKat623 (CAT 6 23 AWG cable), and the Kramer
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VM-1H4C – Getting Started
3
BC-DGKat7a23 (CAT 7a 23 AWG cable). These specially built cables significantly
outperform regular CAT 5/CAT 6 /CAT 7a cables.
The VM-1H4C supports a range of up to 90m (295ft) at 1080i/SXGA or up to 30m
(98ft) at 1080p/UXGA on shielded BCP-DGKat524 cable; 90m (295ft) at 1080i or
up to 70m (230ft) at 1080p/UXGA on shielded BCP-DGKat623 cable; 100m
(295ft) at 1080i or up to 80m (262ft) at 1080p/UXGA on shielded BCP-DGKat723
cable.
You can daisy-chain up to six DigiKat devices with the maximum overall distance
between the first and last devices being cumulative and limited by the cable type
used.
2.3 About the Power Provision Feature
Only the VM-1H4C needs to be connected to a power source when the devices
are within 90m (270ft) of each other – the VM-1H4C can provide power to the
receiver over the TP cable. This feature applies as long as the cable can carry
power and the distance does not exceed 90m on standard TP cable. For longer
distances, heavy gauge cable should be used (standard TP cable is still suitable
for the video/audio transmission, but not for feeding the power at these distances).
2.4 Defining EDID
The Extended Display Identification Data (EDID) is a data-structure provided by a
display to describe its capabilities to a graphics card (that is connected to the
display’s source). The EDID enables the VM-1H4C 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.
EDID is defined by a standard published by the Video Electronics Standards
Association (VESA).

4
VM-1H4C – Getting Started
2.5 About HDMI—General Description
High-Definition Multimedia Interface (HDMI) is an uncompressed all-digital audio/video
interface, widely supported in the entertainment and home cinema industry. HDMI
ensures an all-digital rendering of video without the losses associated with analog
interfaces and their unnecessary digital-to-analog conversions. It delivers the maximum
high-definition image and sound quality in use today. Note that Kramer Electronics
Limited is an HDMI Adopter and an HDCP Licensee.
HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered
trademarks of HDMI licensing LLC.
In particular, HDMI:
•Provides a simple 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 cable
SIMPLICITY - With video and mul i-channel audio combined into a single cable, the cost,
complexity, and confusion of multiple cables currently used in A/V systems is reduced
LENGTHY CABLE - HDMI technology has been designed to use standard copper cable
construction at up to 15m
•Supports standard, enhanced, high-definition video, and multi-channel digital
audio on a single cable
MULTI-CHANNEL DIGITAL AUDIO - 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
•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, and user-friendly connector
HDMI provides the quality and functionality of a digital interface while also supporting
uncompressed video formats in a simple, cost-effective manner
•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), standard definition formats such as NTSC or PAL, as
well as 480p and 576p

VM-1H4C – Overview
5
3 Overview
The high quality VM-1H4C is a distribution amplifier for HDMI and IR signals over
TP (Twisted Pair) cable. It reclocks and equalizes the input signal and distr butes it
to four TP outputs.
More specifically, the VM-1H4C:
•Supports up to 4.95Gbps data rate (1.65Gbps per graphic channel)
•Can read and store in non-volatile memory the default EDID or the EDID
block from one or a mix of the output display devices, so it can then provide
the EDID information to the source even if the display device is not
connected
•Features I-EDIDPro™ Kramer Intelligent EDID Processing™ – Intelligent
EDID handling & processing algorithm ensures Plug and Play operation for
HDMI systems
•Supports 3D Pass-through, x.v.Color™ and uncompressed audio channels
(Dolby TrueHD, DTS-HD)
•Is HDCP compliant
•Features LEDs indicating a live input and the active output
•Has a remote IR 3.5mm mini jack that supports bidirectional IR signals
•Is 12V DC fed and is housed in a Kramer Desktop enclosure

6
VM-1H4C – Defining the VM-1H4C 1:4 HDMI Over CAT 5 DA
4 Defining the VM-1H4C 1:4 HDMI Over CAT 5
DA
The VM-1H4C encodes the HDMI and IR signals and transmits them over TP
cable to a compat ble receiver (for example, the Kramer TP-574 HDMI/RS-232/IR
Line Receiver).
Figure 1defines the front and rear panels of the VM-1H4C.
Figure 1: VM-1H4C 1:4 HDMI Over CAT 5 DA Front and Rear Panels
# Feature Function
1 POWER LED Lights green when the unit receives power
2 REMOTE IR 3.5mm Mini Jack Connect to the remote IR blaster or receiver
3 INPUT LED Lights green when the input receives a signal
4 EDID READ Button Press to capture the EDID from the active output
5 SELECT Button Press to select the output from which to capture the EDID
6 OUTPUT LEDs The relevant LED lights green when the output is connected
7 INPUT HDMI Connector Connect to the HDMI source
8 RS-232 9-pin D-sub
Connector For the use of Kramer service personnel only
9 OUT 1 ~ 4 TP Output
RJ-45
Connectors
Connect to the LINE IN RJ-45 connector on the TP receivers,
for example, TP-574 (See Section 7
10
)
12V DC Power Connector Connect to the +12V DC power adapter. Center pin positive

VM-1H4C – Connecting the VM-1H4C
7
7
5 Connecting the VM-1H4C
After connecting your VM-1H4C connect the power adapter.
Figure 2: Connecting the VM-1H4C
Warning: Using a TP cable that is incorrectly wired may cause
permanent damage to the device
To connect the VM-1H4C as illustrated in the example in Figure 2
1. Connect the HDMI source (for example, a DVD player) to the Input (HDMI)
connector.
:
2. Connect the TP RJ-45 outputs to up to four TP acceptors (for example,
TP-574).
3. Connect the front panel remote IR 3.5mm mini jack to the IR device (for
example, the IR Blaster).
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8
VM-1H4C – Acquiring the EDID
6 Acquiring the EDID
The VM-1H4C is programmed with a default EDID (see Section 9
You can acquire the EDID from:
). This lets you
connect the power before having to connect one of the acceptors. To change this
default EDID, you must acquire the new EDID from a display device.
•One of the connected outputs (the relevant output LED lights)
•The default EDID (all output LEDs light)
•Up to four connected outputs using the Auto-mix Mode (all output LEDs light
in a running pattern)
This is usually done only once, when the machine is being set up in an installation.
Once acquired, the EDID is saved in non-volatile memory and further acquisition is
not necessary.
To acquire the EDID:
1. Connect the output(s) from which you want to acquire the EDID.
2. Press the EDID SELECT button briefly.
The device enters the EDID programming mode.
3. Press the EDID SELECT button repeatedly until the required EDID is
indicated based on the patterns descr bed above.
4. Press the EDID READ button.
The relevant LEDs flash in a pattern for a few seconds as follows:
Slowly and then no longer lights. The EDID was successfully read.
Quickly and then no longer lights. The EDID was not read and the
default EDID was stored.

VM-1H4C – Wiring the Twisted Pair RJ-45 Connectors
9
9
7 Wiring the Twisted Pair RJ-45 Connectors
When using STP cable, connect/solder the cable shield to the RJ-45 connector
shield. Figure defines the TP pinout using a straight pin-to-pin cable with RJ-45
connectors.
3
Note, that the cable Ground shielding must be connected/soldered to
the connector shield.
EIA /TIA 568B Figure 3: TP Pinout Wiring
PIN
Wire Color
1 Orange / White
2 Orange
3 Green / White
4 Blue
5 Blue / White
6 Green
7 Brown / White
8 Brown
Pair 1 4 and 5
Pair 2 1 and 2
Pair 3 3 and 6
Pair 4 7 and 8
Warning: Using a TP cable that is incorrectly wired may cause
permanent damage to the device
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10
VM-1H4C – Technical Specifications
8 Technical Specifications
INPUTS: 1 HDMI connector
1 IR on a 3.5mm mini jack
OUTPUTS: 4 TP on RJ-45 connectors
BANDWIDTH: Supports up to 4.95Gbps (1.65Gbps per graphic channel)
COMPLIANCE WITH HDMI
STANDARD: Supports HDMI and HDCP
INDICATOR LEDs: Power, INPUT, OUTPUT 1, 2, 3 and 4
POWER SOURCE: 12V DC, 2A
OPERATING
TEMPERATURE: 0° to +55°C (32° to 131°F)
STORAGE TEMPERATURE: –45° to +72°C (–49° to 162°F)
HUMIDITY: 10% to 90%, RHL non-condensing
DIMENSIONS: 21.5cm x 16.2cm x 4.4cm (8.5in x 6.38in x 1.7in) W, D, H
WEIGHT: 0.9kg (1.98lbs) approx.
ACCESSORIES: Power supply
OPTIONS: HDMI/HDMI male to male cables, RK-1 19” rack adapter

VM-1H4C – Default EDID
11
9 Default EDID
The factory default EDID is listed below.
Monitor
Model name............... VM1H4C
Manufacturer............. KRM
Plug and Play D......... KRM0114
Serial number............ 505-707455010
Manufacture date......... 2009, ISO week 10
-------------------------
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................... n/a
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 (16:10)
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 ST

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:
E-mail:
www.kramerelectronics.com
[e-mail]
P/N
2900-300133
Rev
2
!
SAFETY WARNING
Disconnect the unit from the power
supply before opening and servicing