Kramer KRT-4 User Manual

P/N: 2900-301295 Rev 1 www.KramerAV.com

USER MANUAL

MODEL:

KRT-4
Cable Retractor

Kramer Electronics Ltd.

KRT-4 – Contents

i

Contents

Introduction 1

Getting Started 1
Overview 2
Typical Applications 2

Defining the KRT-4 Cable Retractor 3

KRT-4-3H2 Features 4

Installing KRT-4 5

Attaching KRT-4 to the Underside of a Table 5
Attaching KRT-4 to a TBUS 6

Connecting to the KRT-4 11
Technical Specifications 12

KRT-4-3H2 Extender Additional Specifications 12
KRT-4 Outline Dimensions with TBUS 13

Kramer Electronics Ltd.

KRT-4 – Introduction

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!

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 www.kramerav.com/downloads/KRT-4 to check for up-to-date user manuals,
application programs, and to check if firmware upgrades are available (where appropriate).

Achieving 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 KRT-4 away from moisture, excessive sunlight and dust.

Safety Instructions

Caution:

• This equipment is to be used only inside a building. It may only be connected to other
equipment that is installed inside a building.

• There are no operator serviceable parts inside the unit.

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 www.kramerav.com/support/recycling.

Kramer Electronics Ltd.

KRT-4 – Introduction

2

Overview

KRT-4 is a cable retractor, with a gentle retraction mechanism, that is designed for installing

in a meeting room, classroom or other AV site. You can furniture-mount KRT-4 or install one
or more KRT-4 units in conjunction with a Kramer TBUS unit, such as TBUS-1AXL,

TBUS-10XL, UTBUS-1XL, UTBUS-2XL and more. KRT-4 extends a variety of common AV

connector types and is easy to install and use.

KRT-4 provides user-friendly installation and operation:

• Convenient and easy to install in any TBUS.

• Intuitive Use – Pull and stop or pull and retract.

• Cable slowly retracts for safe use.

• Available Cable Types:

▪ HDMI.
▪ VGA.
▪ Audio (3.5mm).
▪ LAN.
▪ USB-3.0.
▪ USB-C.
▪ DisplayPort.
▪ Mini DisplayPort/HDMI (on the retractor side), passing up to 4K30Hz.
▪ HDMI extender (KRT-4-3H2, see KRT-4-3H2 Features on page 4).

Refer to www.kramerav.com/product/KRT-4 for the updated configuration list.

• Maximum Cable Extension – Up to 1.8m (6ft).

• Horizontal Mount – Easily mounts, independently, under a table or shelf.

• TBUS Compatibility – Retractable cable mounts directly into the TBUS insert opening via

a cable pass-through opening.

• Installation – KRT-4 is sturdy, cost-effective, and easy to install.

The HDMI cable version is used throughout this manual as an example. The same applies to
retractors with other cable types.

Typical Applications

The KRT-4 is ideal for:

• Boardrooms and conference rooms.

• Training rooms.

• Hotel lobbies.

• Cafes and restaurants.

Kramer Electronics Ltd.

KRT-4 – Defining the KRT-4 Cable Retractor

3

Defining the KRT-4 Cable Retractor

This section defines the KRT-4.

Figure 1: Defining the KRT-4 Cable Retractor

#

Feature

Function

Retractor Enclosure

Contains the retractable cable mechanism.

Female Connector

Connect to a male connector under a table.

Fixed Cable End

Short connector cable.

Screw Openings for Mounting Under the
Table (3)

Use to attach the KRT-4 directly under a table.
Wing-Head Thumb Screw

Use to turn and lock KRT-4 to the TBUS enclosure.

TBUS Installation Slot

Insert TBUS body into the slot to attach KRT-4 to a
TBUS.

Mobile Retractor Cable

Pull to connect to a connector above a table.

Retractor-Side Connector

Connect to a male connector.

Kramer Electronics Ltd.

KRT-4 – Defining the KRT-4 Cable Retractor

4

KRT-4-3H2 Features

The KRT-4-3H2 retractor side is a 4K HDR equalizer and line driver for HDMI and HDCP 2.2
signals that extends the range when using long HDMI cables.

Figure 2:KRT-4-3H2 – Extender Side

KRT-4-3H2 features:

• A range of 10m to input, 10m from output, total 20m (65ft) at 4K60 (4:4:4); 25m to input,
15m from output, total 40m (130ft) at 4K60 (4:2:0); 30m to input, 15m from output, total
45m (150ft) at 1080p60.

• HDTV compatibility.

• HDCP 2.2 support.

• HDMI Support – HDR10, ARC, CEC, deep color, x.v.Color™, Lip Sync, 7.1 PCM, Dolby

TrueHD, Dolby atmos DTS–HD, 2K, 4K, and 3D Dolby Vision as specified in HDMI 2.0.

• Optional external power supply via micro USB port.