Ericsson Baseband 6648 User manual

Baseband Description
Baseband 6648
Description
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Copyright
© Ericsson AB 2020. All rights reserved. No part of this document may be
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.
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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
AB
TN E SYNC LMTSS
ALARM
1 2
Baseband 6648
B C D A B C D E F G H J K L M
A
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
RD
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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