Kramer 621T User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
621T
DVI Optical Transmitter
621R
DVI Optical Receiver
P/N: 2900-000103 Rev 8

621T, 621R – Contents
i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 3
2.3 Recycling Kramer Products 3
3Overview 4
3.1 About the Power Connect™ Feature 5
3.2 Using Twisted Pair Cable 5
4Defining the 621T, 621R DVI Optical Transmitter/Receiver 6
4.1 Defining the 621T DVI Optical Transmitter 6
4.2 Defining the 621R DVI Optical Receiver 7
5Connecting and Operating the 621T, 621R 8
5.1 Connecting the 621T/621R DVI Optical Transmitter/Receiver 8
5.2 Operating the 621T/621R DVI Optical Transmitter/Receiver 10
5.3 Wiring the TP LINE IN / LINE OUT RJ-45 Connectors 10
6Technical Specifications 12
Figures
Figure 1: 621T DVI Optical Transmitter 6
Figure 2: 621R DVI Optical Receiver 7
Figure 3: 621T and 621R DVI Optical Transmitter and Receiver System 8
Figure 4: Connecting the 621T, 621R DVI Optical Transmitter/Receiver 9
Figure 5: TP PINOUT 10

621T, 621R - 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 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 621T, 621R DVI Optical
Transmitter/Receiver, which is ideal for the following typical applications:
Digital display systems
Flat panel displays, plasma display panels and projectors in conference
rooms and auditoriums
Kiosks with digital flat panel displays for information display

2
621T, 621R - 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.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 621T, 621R 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.
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621T, 621R - 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
Warning:
Do not look directly into the LC receptacles of the
621T, while powered on, although this product is
regulated strictly enough to operate under the Laser
Class 1, classified by CDRH/FDA for eye safety
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
621T, 621R - Overview
3 Overview
The high-performance Kramer 621T and 621R are an optical transmitter and
receiver pair for DVI signals for computer graphics signals. They support
resolutions of up to 1920x1200 at 60Hz and HDTV resolutions of up to 1080p at
60Hz. The 621T converts a DVI signal into an optical signal and the 621R converts
the optical signal back to DVI.
The 621T and 621R have a transmission range of more than 300ft (more than
100m) of single link high-resolution digital graphic data over fiber optic cables and
EDID/HDCP parameters over DDC (UTP) cabling.
Using DDC (Digital Display Channel), the display can inform the video card about its
properties, such as the maximum resolution and the color depth. The video card can then use
this information to ensure that you are presented with valid options for configuring the display.
In particular, the 621T/621R pair features:
A single-link DVI connection that supports a resolution of up to 1920x1200 at
a 60Hz refresh rate
Maximum data rate of 4.95Gbps (1.65Gbps per graphic channel)
Transmission of one red, one green and one blue channel, and one clock over
the fiber optic cables, with 4 simplex or 2 duplex LC fiber connectors
DDC/HDCP interconnection over CAT 5 with RJ-45 connectors, and also
provides power via the UTP cable
Class 1 Laser Eye Safety in compliance with FDA/CDRH and IEC 60825-1
Compliance with the limits for a Class A digital device, pursuant to part 15
and 2 of FCC and CE
Freedom from special memory size, CPU speed and chipsets, when using a
computer
HDTV compatibility

621T, 621R - Overview
5
3.1 About the Power Connect™ Feature
The Power Connect™ feature here means that only one unit in a system, the
transmitter or receiver, needs to be connected to a power source when the
devices are within 90m (270ft) of each other. The Power Connect™ feature
applies as long as the cable can carry power and the distance does not exceed
90m on standard TP cable. For longer distances, use heavy gauge cable (TP
cable is still suitable for the video/audio transmission, but not for feeding the power
at these distances).
3.2 Using Twisted Pair Cable
Kramer engineers have developed special 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: BC-DGKat7a23
(CAT 7a 23 AWG cable). These specially built cables significantly outperform
regular CAT 5 / CAT 6 / CAT 7a cables.

6
621T, 621R - Defining the 621T, 621R DVI Optical Transmitter/Receiver
4 Defining the 621T, 621R DVI Optical
Transmitter/Receiver
This section defines the DVI Optical Transmitter/Receiver:
621T DVI Optical Transmitter (see Section 4.1)
621R DVI Optical Receiver (see Section 4.2)
4.1 Defining the 621T DVI Optical Transmitter
Figure 1: 621T DVI Optical Transmitter
#
Feature
Function
1
DVI IN Connector
Connects to the DVI source
2
12V DC
12V DC connector for powering the unit
3
POWER LED
Lights when receiving power
4
LINK LED
Lights when receiving a stable DVI signal
5
OPTIC CABLE
CL R
Connect to the optic connectors on the 621R
6
G B
7
DDC CAT 5 Connector
Connects to the DDC RJ-45 connector on the 621R
using a UTP CAT5 cable with RJ-45 connectors at both
ends (the PINOUT is defined in 5.3)

621T, 621R - Defining the 621T, 621R DVI Optical Transmitter/Receiver
7
4.2 Defining the 621R DVI Optical Receiver
Figure 2: 621R DVI Optical Receiver
#
Feature
Function
1
DVI OUT Connector
Connects to the DVI acceptor
2
12V DC
12V DC connector for powering the unit
3
POWER LED
Lights when receiving power
4
LINK LED
Lights when receiving a stable DVI signal
5
OPTIC CABLE
R CL
Connect to the optic connectors on the 621T
6
B G
7
DDC CAT 5 Connector
Connects to the DDC RJ-45 connector on the 621T
using a UTP CAT5 cable with RJ-45 connectors at both
ends (the PINOUT is defined in Section 5.3

8
621T, 621R - Connecting and Operating the 621T, 621R
5 Connecting and Operating the 621T, 621R
Always switch off the power to each device before connecting it to your
621T, 621R. After connecting your 621T, 621R, connect its power and
then switch on the power to each device.
We recommend testing your system configuration by first connecting
the entire system (as illustrated in Figure 3), using short copper cables
instead of optical fiber cables.
To connect the 621T, 621R as illustrated in the example in Figure 4:
You can use the 621T and 621R to configure a DVI optical transmitter and receiver
system as illustrated in Figure 3: the source connects to the 621T, the 621R
connects to the display, and both transmitter and receiver are interconnected via
fiber optics and UTP cabling.
Figure 3: 621T and 621R DVI Optical Transmitter and Receiver System
5.1 Connecting the 621T/621R DVI Optical
Transmitter/Receiver
To connect the 621T DVI Optical Transmitter with the 621R DVI Optical Receiver,
as the example in Figure 4 illustrates, do the following:
1. Connect the DVI source (for example, a computer) to the 621T DVI IN
connector, using the DVI cable.
Make sure that the system is not powered up when connecting the DVI
source.
2. On the 621R, connect the DVI OUT connector to the DVI acceptor (for
example, a display), using the DVI cable.
3. Remove the module dust covers and connect each duplex LC fiber cable
one-by-one to each of the four LC receptacles of the 621T and 621R.
i
Receiver
621R
Transmitter
621T
Optic Fiber Cables up to 100 meters
DDC Cabling up to 100 meters

621T, 621R - Connecting and Operating the 621T, 621R
9
4. Carefully recheck the polarities and ensure that the duplex connectors are
fully engaged.
Do not look directly into the LC receptacles of the 621T, while
powered on, although this product is regulated strictly enough to
operate under the Laser Class 1, classified by CDRH/FDA for eye
safety.
5. Connect the DDC RJ-45C connector on the 621T to the DDC RJ-45C
connector on the 621R, via UTP cabling (see Section 5.3).
6. Connect the 12V 2.1A DC power adapter to the power socket of either the
621T or the 621R and connect the adapter to the mains electricity (not
shown).
Alternatively, connect the separate power supplies to the transmitter and to the receiver
simultaneously.
7. Turn the power on the source and the display to ON.
Figure 4: Connecting the 621T, 621R DVI Optical Transmitter/Receiver
!

10
621T, 621R - Connecting and Operating the 621T, 621R
5.2 Operating the 621T/621R DVI Optical
Transmitter/Receiver
To properly operate the 621T/621R system:
Make sure you have a media receiver or a graphic controller card with a DVI
connector on your PC/Mac or SUN system.
Make sure that your graphic card supports the maximum resolution of the
display you are about to connect
Avoid “hot plugging” the 621T or 621R. This is not a recommended practice
with live digital voltages
5.3 Wiring the TP LINE IN / LINE OUT RJ-45 Connectors
This section defines the TP pinout, using a straight pin-to-pin cable with RJ-45
connectors.
Note, that the cable ground shielding must be connected / soldered to
the connector shield.
EIA /TIA 568B
Figure 5: TP PINOUT
PIN
Wire Color
1
Orange / White
2
Orange
3
Green / White
4
Blue
5
Blue / White
6
Green
7
Brown / White
8
Brown
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621T, 621R - Connecting and Operating the 621T, 621R
11
The RJ-45 pin assignments are as follows:
PIN
Symbol
Description
1
DDC Data GND
DDC Data line return ground
2
DDC Data
DDC Data line for (HDMI Digital Display Channel) DDC2B
communication
3
DDC Clock GND
DDC Clock line return ground
4
Power GND
Main power return ground
5
Power
Main power for Kramer module
6
DDC Clock
DDC Clock line for (HDMI Digital Display Channel) DDC2B
communication
7
5V_IN
DVI 5V (DVI No. 14 pin for Display)
8
HPD
Signal is driven by monitor to enable the system to identify the
presence of a Display

12
621T, 621R - Technical Specifications
6 Technical Specifications
621T
621R
INPUTS:
DVI IN (DVI-D on a DVI-I
connector)
4 LC optical connectors for R, G,
B & clock. 1 CAT 5 (RJ-45) for
DDC and HDCP bi-directional
data
OUTPUTS:
4 LC optical connectors for R,
G, B & Clock. 1 CAT 5 (RJ-45)
for DDC and HDCP bi-
directional data
DVI OUT (DVI-D on a DVI-I
connector)
MAX. DATA RATE
4.95Gbps (1.65Gbps per graphic channel)
POWER
CONSUMPTION:
12V DC 390mA
12V DC 380mA
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
DIMENSIONS:
12cm x 8.05cm x 2.75cm (4.72" x 3.17" x 1.08", W, D, H)
WEIGHT:
0.3 kg. (0.67 lbs.) approx.
ACCESSORIES:
Power supply, bracket installation kit, 1 DVI/DVI male to male cable
OPTIONS:
RK-3T 19” rack adapter
Specifications are subject to change without notice at http://www.kramerelectronics.com

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: [e-mail]
Laser Compliance
LASER PRODUCT
Laser Class 1 acc. 21 CFR
1040 and Class 1 per
IEC 60825-1
P/N:
2900-000103
Rev:
8
!
SAFETY WARNING
Disconnect the unit from the power
supply before opening and servicing