Ericsson Baseband 6648 Bedienungsanleitung

Baseband Description

Baseband 6648

Description

271/1551-LZA 701 6001/1 Uen A

reproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due to

continued progress in methodology, design and manufacturing. Ericsson shall

have no liability for any error or damage of any kind resulting from the use of this

document.

Trademark List

All trademarks mentioned herein are the property of their respective owners.

These are shown in the document Trademark Information.

271/1551-LZA 701 6001/1 Uen A | 2020-04-29

Contents

1Product Overview 1

1.1 Main Features 1

1.2 Purpose 1

1.3 Variants 1

1.4 Overview 1

1.5 Warranty Seal 2

2Function Description 3

3Technical Data 5

3.1 Dimensions 5

3.2 Environmental Characteristics 5

3.3 Power Characteristics 5

4Hardware Architecture 7

5Baseband Interfaces 8

6Standards and Regulations 10

6.1 Regulatory Approval 10

6.2 Preventive Maintenance 12

6.3 Spare Parts 12

6.4 Transportation and Storage 12

Contents

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Baseband Description

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1 Product Overview

This document describes the 19-inch baseband units for Ericsson Radio Systems.

1.1 Main Features

This section describes the main features of the baseband.

Not all features are supported by all equipment congurations. For a description

of the current equipment congurations, see RBS Congurations.

The main features of the baseband are the following:

—NR, LTE, and NR + LTE Mixed Mode

—Elastic RAN

—Backhaul cascading

1.2 Purpose

Baseband 6648 provides switching, trafc management, timing, baseband

processing, and radio interfacing. The baseband unit is in the 19-inch format,

with 12 Common Public Radio Interface (CPRI or eCPRI) ports, enabling

increased connectivity for radio units.

1.3 Variants

—Baseband 6648:

• R2C and R2D versions have an operating temperature of 0 to +45°C.

• R2C and R2D versions have approximately 10% higher power

consumption across the temperature range.

For information about supported congurations and capacity, refer to RBS

Congurations

1.4 Overview

This section provides an overview of the 19-inch baseband units, see Figure 1.

Product Overview

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Ge19100A

-48V MAX 8A

TN E SYNC LMTSS

ALARM

1 2

Baseband 6648

B C D A B C D E F G H J K L M

TN/IDL

Figure 1 Overview Baseband 6648

Baseband 6648 is a self-contained 19-inch unit with an easily removable fan tray

unit. Each unit can be installed standalone in any 19-inch rack or enclosure or in

an RBS.

Baseband 6648 facilitates a scalable, modular system with one or more indoor

19-inch baseband units and a number of external radios.

For information about 19-inch baseband unit placement in an enclosure or an

RBS, refer to Enclosure Description or RBS Description.

AIR / RRU

Ge19971A

Optical

cable

Optical

cable

Power

cable

AIR

Radio

Antenna

Baseband 6648

Power

IRU

Figure 2 19-Inch Baseband Connected to External Radios

1.5 Warranty Seal

The product is equipped with a warranty seal sticker.

Note: Seals that have been implemented by Ericsson must not be broken or

removed, as it otherwise voids warranty.

Baseband Description

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2 Function Description

The Baseband has the following functions:

—Timing function

—Loadable software

—Downlink (DL) baseband processing

—Uplink (UL) baseband processing

—IP trafc management

—Radio interface

—Backhaul handling

—External synchronization

For the block diagram of the Baseband, see Figure 3.

Ge0376B

Baseband

Processing

Transmission

Timing

Radio

interface

Baseband

Figure 3 Baseband Block Diagram

For more information about the external synchronization, see the following

documents:

—GNSS Receiver System Description

—GNSS Receiver System User Guide

—Manage Network Synchronization

—Manage Node Group Synchronization

Function Description

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—Manage LTE RAN Synchronization

Baseband Description

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3 Technical Data

3.1 Dimensions

Dimensions and weight for the 19-inch Baseband unit are listed in Table 1, and .

Table 1 Dimensions and Weight

Baseband Height Width Depth Weight

Baseband 6648 1 U

(44.45 mm) 19-inch 352 mm ≈ 7.5 kg

3.2 Environmental Characteristics

Values for the normal operating environment of the baseband unit are shown in

Table 2.

Table 2 Environmental Data

Description Value

Temperature 0 to +55°C

Relative humidity 5–95%

Absolute humidity 1–29 g/m3

Maximum temperature change 0.5°C/min

Note: The operating environment of the unit must be a temperature-controlled

enclosed location suitable for sensitive data and telecommunication

equipment, with very low levels of airborne particles. For example

Network Telecommunication Facilities or inside an Outside Plant (OSP)

cabinet.

3.3 Power Characteristics

The power supply voltage for the baseband unit is −48 V DC. The power supply

requirements are shown in Table 3.

Table 3 DC Power Supply Requirements

Condition Value

Nominal voltage −48 V DC

Technical Data

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Condition Value

Operating voltage range −38.0 to −58.5 V DC

Non-destructive range 0 to −60 V DC

Fuse and Circuit Breaker Recommendations

The external fuse and circuit breaker recommendation for the baseband unit is

shown in Table 4.

The recommendations in this section are based on peak power consumption and

give no information on power consumption during normal operation.

The recommended melting fuse type is gG-gL-gD in accordance with

IEC 60269-1. Circuit breakers must comply with at least Curve 3 tripping

characteristics in accordance with IEC 60934.

Table 4 Fuse and Circuit Breaker Recommendations

DC Power Minimum Fuse Rating for

Reliable Operation (A)(1)

Maximum Fuse Rating

(A)(2)

Baseband unit 16 20

(1) The recommended fuse rating corresponds to peak load and depends on the conguration.

(2) This value is the internal maximum fuse rating for the unit. General fuse dimensioning have to

take all external factors into account, such as local regulations and cable dimensioning.

3.3.1 Power Consumption

The power consumption values are presented as typical and maximum values,

for a unit with fan. The typical values are based on an air temperature of 20 °C

for the air entering the unit and a typical trafc load. The maximum values are

based on an air temperature of 40 °C for the air entering the unit and a maximum

trafc load.

Note: The power consumption for SFPs or GPS is not included.

Table 5 Power Consumption

Unit Typical Maximum

Baseband 6648 ≈ 310 W ≈ 340 W

For information on power consumption values see Power Consumption Data and

Power Consumption Calculations.

Baseband Description

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