Nokia MetroSite Leitfaden
Nokia MetroSite EDGE Base Station
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Maintenance
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The information in this documentation is subject to change without notice and describes only
the product defined in the introduction of this documentation. This documentation is intended
for the use of Nokia's customers only for the purposes of the agreement under which the
documentation is submitted, and no part of it may be reproduced or transmitted in any form or
means without the prior written permission of Nokia. The documentation has been prepared to
be used by professional and properly trained personnel, and the customer assumes full
responsibility when using it. Nokia welcomes customer comments as part of the process of
continuous development and improvement of the documentation.
The information or statements given in this documentation concerning the suitability, capacity,
or performance of the mentioned hardware or software products cannot be considered binding
but shall be defined in the agreement made between Nokia and the customer. However, Nokia
has made all reasonable efforts to ensure that the instructions contained in the documentation
are adequate and free of material errors and omissions. Nokia will, if necessary, explain issues
which may not be covered by the documentation.
Nokia's liability for any errors in the documentation is limited to the documentary correction of
errors. NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS
DOCUMENTATION OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL
(INCLUDING MONETARY LOSSES), that might arise from the use of this documentation or
the information in it.
This documentation and the product it describes are considered protected by copyright
according to the applicable laws.
NOKIA logo is a registered trademark of Nokia Corporation.
Other product names mentioned in this documentation may be trademarks of their respective
companies, and they are mentioned for identification purposes only.
Copyright © Nokia Corporation 2002. All rights reserved.
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Hereby, Nokia Corporation, declares that this product is in compliance with the
essential requirements and other relevant provisions of Directive: 1999/5/EC.
The product is marked with the CE marking and Notified Body number according to the
Directive 1999/5/EC.
FCC FCC §15.21 - Information to user - This product is used as an intentional radiated
equipment and any changes or modifications on the equipment without any approval
by Nokia could void the user's authority to operate the equipment.
FCC §15.105 - Information to user - This equipment has been tested and found to
comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
0523
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Contents
Contents 5
List of tables 7
List of figures 8
1 About this document 11
2 Preparations for maintenance 13
2.1 Site folder 13
2.1.1 Fault reporting 13
2.2 Maintenance equipment 13
2.2.1 Nokia BTS Manager 14
2.3 Environmental precautions 14
2.4 Power supply precautions 14
2.5 Removing the BTS cover 15
3 Periodic maintenance 17
3.1 Maintaining the cabinet 17
3.1.1 Fan unit and air circulation 17
3.1.2 Cover 17
3.1.3 Seals 18
3.1.4 Lock 18
3.2 Periodic testing of the BTS 18
4 Adjusting the 13 MHz clock 19
5 Troubleshooting 23
5.1 Testing the BTS 23
5.2 Troubleshooting checklist 24
6 Replacing units 27
6.1 ESD protection 27
6.2 Removing units 28
6.3 Recycling of units 30
6.4 Replacing TRXs 30
6.4.1 TRX slot identification 30
6.4.2 Replacing a slave TRX 31
6.4.3 Replacing the master TRX in BTS configurations with two or more
TRXs 33
6.4.4 Replacing the master TRX in a single TRX BTS 34
6.5 Replacing the transmission unit 35
6.6 Replacing the interface unit 38
6.7 Replacing the power supply unit 39
6.8 Replacing the cooling fan 40
6.8.1 Replacing the HVMF cooling fan, version 1 40
6.8.2 Replacing the HVMF cooling fan, version 2 44
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7 LED indicator conditions 47
7.1 Transceiver unit LED 47
7.2 Transmission unit LED 48
7.3 Interface unit LED 48
7.4 Power supply unit LED 49
7.5 Fan unit LED 49
Index 51
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List of tables
Table 1. Power supply rules during maintenance procedures 15
Table 2. Troubleshooting checklist 24
Table 3. LED conditions for TRX units 47
Table 4. LED conditions for a transmission unit 48
Table 5. LED conditions for an RRI transmission unit’s Flexbus LED. 48
Table 6. LED conditions for an interface unit 49
Table 7. LED conditions of the power supply unit 49
Table 8. LED conditions for the fan unit 50
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List of figures
Figure 1. Safety strap on the MetroSite EDGE BTS cover 16
Figure 2. 13 MHz clock adjustment 20
Figure 3. Clock control window - coarse adjustment 21
Figure 4. Fine adjustment of the DAC value 22
Figure 5. Electro-static sensitive device symbol 27
Figure 6. Connecting the antistatic wrist strap. 28
Figure 7. Removing the units 29
Figure 8. TRX slot numbering 31
Figure 9. Example Object Properties window in Nokia BTS Manager (can be used
for blocking a TRX) 32
Figure 10. Displacing the sealing strip and releasing the cables 41
Figure 11. HVMF cooling fan assembly and mounting screws 42
Figure 12. HVMF fan assembly, version 1 43
Figure 13. HVMF fan assembly, version 2 45
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Summary of changes
Version 1, 12th November 1999.
Version 2, 22nd June 2000:
• Added GSM to title and body text
• Added high capacity fan assembly (Figure 5)
• Added 13 MHz clock adjustment procedure
Version 3, 30th June 2001:
• Updated for EDGE
• Added power supply rules, new fan controller module, BTS chaining
• Improved 13 MHz clock adjustment illustration
• Harmonised style
Version 3, July 2002:
• Note added to 13 MHz clock adjustment chapter that a high stability
frequency counter is required.
Version 3, October 2002:
• BTS Manager 3.0 commands added for replacing transmission unit.
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