Kramer TR-1YC User manual

Kramer Electronics, Ltd.
USER MANUAL
Models:
TR-1YC, s-Video Isolation Transformer
TR-2YC, s-Video Dual Isolation Transformers

Contents
i
Contents
1 Introduction 1
2 Getting Started 1
2.1 Quick Start 1
3 Overview 3
4 Your Isolation Transformers 4
5 Using the Isolation Transformer 7
5.1 Connecting the Isolation Transformer 7
6 Technical Specifications 8
Figures
Figure 1: TR-1YC s-Video Isolation Transformer 4
Figure 2: TR-2YC s-Video Dual Isolation Transformers 5
Figure 3: The s-Video Isolation Transformers Underside 6
Figure 4: Dipswitch Definitions 6
Figure 5: Connecting the TR-2YC s-Video Dual Isolation Transformers 8
Tables
Table 1: Features and Functions of the TR-1YC s-Video Isolation Transformer 4
Table 2: Features and Functions of the TR-2YC s-Video Dual Isolation Transformers 5
Table 3: Features and Functions of the s-Video Isolation Transformers Underside 6
Table 4: Technical Specifications of the TR-1YC and TR-2YC 8

Introduction
1
1 Introduction
Welcome to Kramer Electronics (since 1981): a world of unique, creative and
affordable solutions to the infinite range of problems that confront the video, audio
and presentation professional on a daily basis. In recent years, we have redesigned
and upgraded most of our line, making the best even better! Our 500-plus different
models now appear in 8 Groups
1
, which are clearly defined by function.
Congratulations on purchasing your Kramer TR-1YC s-Video Isolation
Transformer and/or TR-2YC s-Video Dual Isolation Transformers.
This product is ideal for:
 Broadcast and production video studios
 Staging and fieldwork
The package includes the following items:
 TR-1YC or TR-2YC
 This user manual
2
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
2.1 Quick Start
This quick start chart summarizes the basic setup and operation steps.
1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3:
Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces;
GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors
2 Download up-to-date Kramer user manuals from our Web site at http://www.kramerelectronics.com

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Getting Started
2
2
1
1
2
s-Video Player
s-Video Display

Overview
3
3 Overview
The TR-1YC and the TR-2YC are high performance video isolation
transformers for s-video (Y/C) signals. In many applications, the connection
between video sources and acceptors induces 50Hz or 60Hz ground loops,
with an undesirable effect such as hum bars
1
and audio hum. The TR-1YC
and the TR-2YC provide complete isolation between the video source and
receptor, thus eliminating video hum, ground loops
2
, and DC offsets which
can degrade picture quality.
In the TR-1YC unit, the luminance signal (Y) is transformer coupled while
the band-limited chrominance (C) signal is coupled via a capacitor with high
voltage breakdown. The unit is mainly intended to solve ground problems and
DC offsets.
In the TR-2YC unit, both the luminance (Y) signal and the chrominance (C)
signal are transformer-coupled to allow the broadband signal to pass with
minimum deterioration.
Both the TR-1YC and TR-2YC units:
 Are designed to withstand very high potential differences - on both
channels - between the input and output
 Allow the user to select the ground link by dipswitches
 Are housed in a Kramer TOOLS enclosure and require no power supply –
making them ideal for field applications
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 and magnetic appliances
that may adversely influence signal quality and position your Kramer
Isolation Transformers away from moisture, excessive sunlight and dust
1 May show as a dark or light horizontal bar which slowly scrolls up or down the screen
2 Differences in ground potential may result in ground loops

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your Isolation Transformers
4
4 Your Isolation Transformers
Figure 1 and Table 1 define the TR-1YC s-Video Isolation Transformer:
Figure 1: TR-1YC s-Video Isolation Transformer
Table 1: Features and Functions of the TR-1YC s-Video Isolation Transformer
# Feature Function
1 Ground For use when connecting the unit to an external ground
2 s-VIDEO IN 4p Connector Connects to the video input
3 s-VIDEO OUT 4p Connector Connects to the video output

Your Isolation Transformers
5
Figure 2 and Table 2 define the TR-2YC s-Video Dual Isolation Transformers:
Figure 2: TR-2YC s-Video Dual Isolation Transformers
Table 2: Features and Functions of the TR-2YC s-Video Dual Isolation Transformers
# Feature Function
1 Ground For use when connecting the unit to an external ground
2 s-VIDEO IN 4p Connector Connects to the video input
3 s-VIDEO OUT 4p Connector Connects to the video output

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your Isolation Transformers
6
Figure 3 and Table 3 define the underside of the TR-1YC and TR-2YC:
Figure 3: The s-Video Isolation Transformers Underside
Table 3: Features and Functions of the s-Video Isolation Transformers Underside
Feature Function
Output socket shield Set to GROUND to connect the output socket shield to the
chassis. Otherwise, set to FLOAT
Y + C output signal shield Set to GROUND to connect the Y + C output signal shield to the
chassis. Otherwise, set to FLOAT
Input socket shield Set to GROUND to connect the input socket shield to the
chassis. Otherwise, set to FLOAT
Y + C input signal shield Set to GROUND to connect the Y + C input signal shield to the
chassis. Otherwise, set to FLOAT
Figure 4 illustrates the dipswitch definitions:
Y+C INPUT
SIGNAL SHIELD
INPUT
SOCKET SHIELD
Y+C OUTPUT
SIGNAL SHIELD
OUTPUT
SOCKET SHIELD
Figure 4: Dipswitch Definitions

Using the Isolation Transformer
7
5 Using the Isolation Transformer
The Isolation Transformers are used for s-Video signals.
There are no general rules as to how and where to connect the Isolation
Transformers. This depends on many factors, which relate to the setup of the
studio, improper grounding and so on.
The recommended method is to disconnect all the equipment and then
connect together one piece at a time, checking for hum as each piece of
equipment is re-connected. When hum is detected, an appropriate Isolation
Transformer is connected at that point to break the ground loop.
The Isolation Transformers also provide different grounding combinations,
which are set via the dipswitches for optimum operation. The grounding
conditions usually are set by trial and error. Check all the options to work out
which one best suits your needs
1
.
This section describes how to connect an Isolation Transformer and set the
dipswitches for optimum performance (see section 5.1).
5.1 Connecting the Isolation Transformer
When installing an Isolation Transformer, you just connect it somewhere on the
line between the source and the acceptor. The particular example in Figure 5 shows
how to connect the TR-2YC s-Video Dual Isolation Transformers. However, this is
not a specific recommendation, as there are many different configuration options.
To connect the TR-2YC, as shown in the example in Figure 5, do the
following:
1. Connect a video source (for example, an s-Video player) to the s-VIDEO IN
4p connector.
2. Connect the s-VIDEO OUT 4p connector to a video acceptor (for example, an
s-Video display).
3. Turn the power ON on the s-Video source and acceptor.
4. Set the dipswitches for optimum performance
2
.
The same principles apply to the TR-1YC, simply connect the unit anywhere
between the source and acceptor, as required.
1 In most applications the ground is not connected
2 See above – usually set by trial and error

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Technical Specifications
8
s-Video Player
s-Video Display
Figure 5: Connecting the TR-2YC s-Video Dual Isolation Transformers
6 Technical Specifications
Table 4: Technical Specifications
1
of the TR-1YC and TR-2YC
INPUT:1s-Video,ona4pconnector
OUTPUT:1s-Video,a4pconnector
INSERTION LOSS: 0.8dB
BANDWIDTH (-3dB): 18MHz
DIFF. GAIN: 0.12%
DIFF. PHASE: 0.13 Deg
K-FACTOR: 0.8% to 0.9%
S/N RATIO: 77.7dB
CONTROLS: Dipswitches for grounding control
VIDEO TILT: 0.1% @ Pulse & Bar
VIDEO NON LINEARITY: 0.1%
COUPLING: AC
DIMENSIONS: 12.1cm x 7.2cm x 3cm (4.77” x 2.85” x 1.2”) W, D, H
WEIGHT: 0.34 kg. (0.75lbs.) approx.
ACCESSORIES: Mounting brackets
1 Specifications are subject to change without notice