Kramer TA Manual de usuario

Kramer Electronics, Ltd.

USER MANUAL

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Model:

Cobra TA

Video / Audio Transmitter

Contents

Introduction 1

Getting Started 1

Overview 1

Setup and Installation 3

4.1

Making the Connections 3

4.2

Connecting the Cobra TA Video / Audio Transmitter 4

4.3

Typical Single-Port Transmitter–Receiver Application 5

Solutions to Common Problems 6

Technical Specifications 7

Figures

Figure 1: Connecting the Cobra TA Video / Audio Transmitter 4

Figure 2: Connecting the Cobra Receiver 4

Figure 3: Transmitter to Receiver Connections 5

Tables

Table 1: Technical Specifications of the Cobra TA Video / Audio Transmitter 7

Table 2: HD15 PINOUT 8

Introduction

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

, which are clearly defined

by function.

Congratulations on purchasing your Kramer TOOLS Cobra TA Video / Audio

Transmitter, which extends VGA and audio signals over ordinary CAT5e

cable.

The package includes the Cobra TA Video / Audio Transmitter and this user

manual

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

. You may

also need 1/8” (3.5mm) audio cable, video cable with HD15 connectors,

and CAT5 cable

The Kramer Cobra series products are not compatible with Kramer non-Cobra

series products.

3 Overview

Our Kramer Cobra series products are compatible with CAT5/5e/6 data

cabling as well as skew free CAT5/5e cabling manufactured for video

applications. Note that some skew free CAT5 is specific to a particular

vendor and is not compatible with our products.

We recommend using our Kramer Cobra ultra low skew cable—BC-HDTP

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 the Internet at this URL: http://www.kramerelectronics.com

3 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Overview

(solid bulk) or BCP-HDTP (solid plenum bulk)—available in lengths of 700'

(210m) and 1300' (390m).

CAT6 cable, due to the manufacture method, can exhibit much greater skew

than standard CAT5/5e and may require skew compensation beyond what the

standard product offers. Contact Kramer Electronics for assistance.

CAT5/5e/6 cabling for this product must be pinned to the TIA-EIA T568B

wiring specification (see appendix A). We also highly recommend that all

CAT5 cables be pre-terminated and tested. Cables terminated on-site or in an

existing infrastructure should be tested before use to ensure compliance with

the TIA-EIA T568B specification. Using incorrectly terminated CAT5 cables

can damage this product.

Achieving the best performance means:

Connecting 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)

Avoiding interference from neighboring electrical appliances that may

adversely influence signal quality and positioning your Cobra TA in a

location free from moisture and away from excessive sunlight and dust

Caution – No operator-serviceable parts inside unit.

Warning – Use only the Kramer Electronics input power

wall adapter that is provided with this unit

Warning – Disconnect power and unplug unit from wall

before installing or removing device or servicing unit.

Warning –This equipment is not intended for, nor does it

support, distribution through an Ethernet network. Do not

connect these devices to any sort of networking or

telecommunications equipment!

1 For example: model number AD2512C, part number 2535-000251

Setup and Installation

4 Setup and Installation

With regard to connecting the cables:

We recommend mounting and connecting all cabling to the Cobra TA

Video / Audio Transmitter components before applying power.

Be sure that the CAT5 cable you intend to use has been tested to comply

with the T568B wiring specification (see Appendix A).

4.1 Making the Connections

This section contains figures showing connections with the specific Cobra

Series models. In general, however, the connection and setup procedure at

both transmitter and receiver ends is as follows:

At the transmitter end:

1. Connect the source video to the Cobra TA Series transmitter video input

port, which is an HD15 connector labeled VIDEO INPUT.

2. Make your audio connections via the 1/8” (3.5mm) audio connector.

3. Connect the CAT5 cable to the transmitter.

4. Apply power on the transmitter. The LED should light.

At the receiver end (refer to the receiver user manual):

1. Connect the VIDEO OUTPUT HD15 connector to the display unit.

2. Connect a 1/8” (3.5mm) audio cable to the AUDIO OUTPUT connection.

3. Connect the CAT5 cable to the UTP connection.

4. Apply power. The LED should light and video should appear on the

display (make sure display is powered ON).

5. To adjust video levels see appropriate section in receiver user manual.

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Setup and Installation

4.2 Connecting the Cobra TA Video / Audio Transmitter

The Cobra TA Video / Audio Transmitter supports video and audio signals

over CAT5 cable. The audio signal is line-level audio, and powered speakers

are required. Figure 1 shows the Cobra TA Video / Audio Transmitter

connections, and Figure 2 shows a typical Cobra receiver connection.

Figure 1: Connecting the Cobra TA Video / Audio Transmitter

Figure 2: Connecting the Cobra Receiver

Setup and Installation

4.3 Typical Single-Port Transmitter–Receiver Application

Figure 3 shows a typical application in which the Cobra TA Video / Audio

Transmitter is connected over CAT5 to a receiver.

Figure 3: Transmitter to Receiver Connections

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Solutions to Common Problems

5 Solutions to Common Problems

There are no user configurable settings on the Cobra TA Video / Audio

Transmitter. In most cases, nearly every issue with the Cobra Series can be

resolved by checking the CAT5 termination and making sure that it is pinned

to the 568B wiring specification. However, there may be other problems that

cause the system to not perform as it is designed. Below are solutions to the

most common installation errors.

Problem:

No video signal at the receiver.

Solution:

Check that both units are powered.

Ensure Cable Length Compensation adjustments are set

correctly on the receiver.

Make sure the CAT5 cable is terminated correctly per the 568B

wiring specification.

Is the display device powered on and functioning?

Note, that if cable EQ adjustment is too high, or too low, for a

given cable length, an image may not appear.

Problem:

Poor video quality.

Solution:

Have all receiver adjustments been finished?

Check all cable connections.

Ensure Cable Length Compensation adjustments are set

correctly on the receiver.

The video signal’s refresh rate may be set too high for the display.

Reset to a lower refresh rate in your monitor-configuration menu.

Problem:

Poor audio quality.

Solution:

Powered speakers are required. Make sure speaker power is ON.

Check input source levels from the source device. Make sure the

audio source is not overdriven or underdriven.

Problem:

“Green shift” or “green washout” on multimedia signals.

Solution:

The standard video model is designed to function with DC

coupled signals in which the black level is referenced to 0 volts.

Nearly all VGA cards function this way. Some media servers and

VGA DAs, however, provide AC coupled signals and can cause a

green color shift in the video. This is a result of the sync clamping

on the red and blue channels of the transmitter/receiver units.

Technical Specifications

6 Technical Specifications

Table 1: Technical Specifications

of the Cobra TA Video / Audio Transmitter

CABLE REQUIRED: Category 5, 5e, 6 shielded or unshielded twisted pair

COMPLIANCE: CE; FCC Class A, IC Class/class A

VIDEO SUPPORT: RGBHV, RGB, Composite, S-Video, Component Video modes

MAXIMUM RESOLUTION AND

REFRESH RATE: To 1920x1200 @ 60Hz (receiver dependent)

REQUIRED SOURCE IMPEDANCE: Video OUT: 75 ohms;

Audio OUT: 600 ohms maximum

REQUIRED DESTINATION

IMPEDANCE: Video IN: 75 ohms

Audio IN: 600 ohms minimum

AUDIO CHARACTERISTICS: Channels: Right/Left summed;

Line Level 600 Ohm Unbalanced

CONNECTORS: (1) 3.5-mm, (1) RJ-45, (1) HD15 F

TEMPERATURE

TOLERANCE:

Operating: 32 to 104°F (0 to 55°C);

Storage: -4 to +140°F (-20 to +60°C)

HUMIDITY

TOLERANCE:

Up to 80% noncondensing

ENCLOSURE: Steel

POWER: +5 VDC @ 260 mA max

Consumption: 1.3 watts maximum

SIZE: 1.38 "H x 3.62"W x 4.38"D (3.5 x 9.2 x 11.1 cm)

WEIGHT: 0.62 lb. (0.28 kg)

1 Specifications are subject to change without notice

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Technical Specifications

Appendix A Cabling Pinouts

Table 2: HD15 PINOUT

Pin RGBHV

(VGA) RGBS RGsB Composite SVHS

(Y/C) YUV Composite Video

and Stereo Audio

1 Red + Red + Red + C+ V+ Audio

2 Green+ Green+ Green+ C+ Y+ Y+ C+

3 Blue+ Blue+ Blue+ U+ Audio

4 — — —

5 Gnd Gnd Gnd

6 Red- Red- Red- C- V- Shield

7 Green- Green- Green- C- Y- Y- C-

8 Blue- Blue- Blue- U- Shield

9 — — —

10 Gnd Gnd —

11 Gnd Gnd —

12 — — —

13 H Sync C Sync —

14 V Sync — —

15 Gnd Gnd —

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