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User’s Manual for Node G

Network Elements

Page 38

M0121A2A.doc

4.3.4. Digital Channel Module (DCM)

The task of the digital channel module (DCM) is to filter and amplify any signals
passing through it. In addition it takes measurements of the input and output signals
and decodes the air interface to ensure proper setup and operation.

Finally it performs the interference cancellation algorithms, which eliminate the
normal problems associated with isolation, and has an integrated controller for the
entire Node G, which maintains a web server for local and remote communication.
This process is accomplished by both analogue and digital means.

The DCM is able to amplify two channels for uplink and downlink. The UL power
amplifier is integrated in the DCM.

figure 4-9 Digital channel module

In the DCM frequency hopping is integrated (see features of Node G).

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Содержание Node G 930

Страница 1: ...ID No 7164491 Page 1 User s Manual for Node G Network Elements ...

Страница 2: ...ht to change all hard and software characteristics without notice Names of products mentioned herein are used for identification purposes only and may be trademarks and or registered trademarks of their respective companies No parts of this publication may be reproduced stored in a retrieval system transmitted in any form or by any means electronical mechanical photocopying recording or otherwise ...

Страница 3: ...s Power Switch 26 4 FUNCTIONAL DESCRIPTION 29 4 1 DIGITAL ARCHITECTURE 29 4 2 FEATURES 31 4 2 1 Digital Channel Filters 31 4 2 2 Digital Interference Cancellation Equipment ICE 31 4 2 3 Frequency Hopping 31 4 2 4 Voltage Standing Wave Ratio VSWR 32 4 2 5 Status Information 32 4 2 6 Alarm forwarding 32 4 3 COMPONENTS MAIN AND EXTENSION UNIT 33 4 3 1 Downlink Final Amplifier 34 4 3 2 Power Supply Un...

Страница 4: ...AWINGS 53 6 2 LAYOUT 54 7 SPECIFICATIONS 57 7 1 MAIN UNIT 57 7 1 1 Electrical Specification 57 7 1 2 Mechanical Specification 58 7 1 3 Environmental Specification 58 7 2 EXTENSION UNIT 59 7 2 1 Electrical Specification 59 7 2 2 Mechanical Specification 60 7 2 3 Environmental Specification 60 7 3 BATTERY PACK 61 7 4 MODEM 61 8 PARTS LISTS 63 8 1 SOFTWARE APPLICATION FILES 63 8 2 MAIN UNIT 63 8 3 EX...

Страница 5: ...le from the modem to the DL IN duplexer 37 figure 4 9 Digital channel module 38 figure 4 10 Establishing a local connection from laptop or PC to the DCM of the Main Unit 39 figure 4 11 Battery pack exemplary 40 figure 4 12 Battery pack installed and its connection to DCM 40 figure 4 13 Position of the battery disconnect button on the EAC card of the Main Unit 41 figure 4 14 Duplexer UL IN 42 figur...

Страница 6: ...List of international contact addresses 11 table 3 1 Required length of thread bolts 20 table 3 2 Components of pole mounting kit 21 table 4 1 Initstrings for a GSM modem 36 table 4 2 Pin assignment of relay contacts 46 table 5 1 Specified torques for various screw types 48 ...

Страница 7: ...lecommunication Standards Institute FRU Field Replaceable Unit GPRS General Packet Radio Service GSM Global System for Mobile Communication HID Hardware Inventory Data HSN Hopping Sequence Number I2 C Bus Inter Integrated Circuit Bus Philips ICE Interference Cancellation Equipment ID No Identification Number LED Light Emitting Diode LMT Local Maintenance Terminal LNA Low Noise Amplifier LO Local O...

Страница 8: ...ment Protocol TS Transmitter UE User Equipment UL Uplink UMTS Universal Mobile Telecommunication System UPS Uninterruptible Power Supply UTC Universal Time Coordinate UTRA UMTS terrestrical radio access VCO Voltage Controlled Oscillator VSWR Voltage Standing Wave Ratio WCDMA Wide band Code Division Multiple Access ...

Страница 9: ...tricted to qualified personnel 7 Only licence holders for the respective frequency range are allowed to operate this unit 8 Use this equipment only for the purpose specified by the manufacturer Do not carry out any modifications or fit any spare parts which are not sold or recommended by the manufacturer This could cause fires electric shock or other injuries 9 Due to power dissipation the network...

Страница 10: ...ure constant first rate quality of the products a comprehensive quality assurance has been conducted at all fabrication stages Every component leaves the factory only after a thorough final acceptance test accompanied by a test certificate guaranteeing optimal function The declaration of conformity for the product is available on request via the local offices or from Mikom directly Any interventio...

Страница 11: ... 8 Wang Hoi Rd Kowloon Bay SAR Hong Kong Phone 852 3106 6100 Fax 852 2751 7800 email WIsupport china andrew com in Canada 1815 Ironstone Manor 12 Pickering Ontario L1W 3W9 Canada Phone 1 905 839 3474 Fax 1 905 839 4663 email WIsupport canada andrew com in Switzerland Tiergartenweg 1 4710 Balsthal Switzerland Phone 41 6238 61260 Fax 41 6238 61261 email WIsupport switzerland andrew com in Italy Via ...

Страница 12: ...User s Manual for Node G Network Elements Page 12 M0121A2A doc For your notes ...

Страница 13: ...etransmits them to the base station The Node G constantly monitors the quality of the signals passing through it while simultaneously electronically decreasing isolation requirements 2 2 THE NODE G NETWORK ELEMENT The Node G is more than a simple enhancer The unit is ideal for the first phase of the network rollout and for any subsequent phase where cost coverage and quality need to be optimized T...

Страница 14: ...ake sure to have the following information at hand important on site conditions e g BTS location mains supply etc channels to be enhanced amplified data of mandatory fields of Connectivity and Upload page c Procedure 1 Install the donor linear polarized recommended and coverage antennas 2 Install the coaxial cables from the Node G to the antennas 3 Install the Node G units Main Unit Extension Unit...

Страница 15: ...n and click the Program button e Select the Connectivity and Upload button to setup the modem if applicable and to enter data in the other user fields f Select the Technician Setup button to change additional system settings e g ICE frequency hopping EDGE The Technician Setup is also accessible from the home page 9 The Node G setup is complete 10 Open the Save Configuration to Laptop menu for reco...

Страница 16: ...User s Manual for Node G Network Elements Page 16 M0121A2A doc For your notes ...

Страница 17: ... unit may reach a very high temperature Ensure sufficient airflow for ventilation Above and below the units a minimum distance of 300 mm to ceiling floor etc has to be kept This distance must also be observed between two units if they are mounted one above the other This value does not apply to the distance between Main Unit and Extension Unit 5 When connecting and mounting the cables RF mains ens...

Страница 18: ...ability The maximum distance between the Node G Main Unit and Extension Unit is 1000 mm Mark the position of the eight drilling holes four per unit for the Main and the Extension Unit according to figure 3 1 Please observe that the figure always shows a pair of drill holes for each position Only drill one of each pair figure 3 1 Positions of drilling holes ...

Страница 19: ...e dowels Use a hex wrench opening 17 old standard or 16 new standard to loosen the M10 hexagon head screws four per unit by which the mounting brackets are fastened to the cabinet sides Mount the mounting brackets to the screws and fasten them using the M8 washers locking rings and hex nuts that are part of the wall mounting kit Hang the cabinets into the brackets and fasten them with the M10 hexa...

Страница 20: ...eck the pole diameter of the pole to which the units will be installed Then cut the thread bolts see table 3 2 Components of pole mounting kit pos 5 to the required length according to the following table Pole diameter mm 100 110 120 130 140 150 160 170 180 190 200 Length of thread bolt mm 216 226 236 246 256 266 276 286 296 306 316 Length of cable bridge mm back to back typical 1000 min 950 table...

Страница 21: ...The numbers in the above table refer to the numbering of the components in the following figure figure 3 5 Back to back pole mounting Dismount the mounting brackets from the cabinets of the units by loosening the hexagon head screws M10x20 by which the mounting brackets are screwed to the housing four per unit Do not unscrew those screws only loosen them by approx three turns and take off the brac...

Страница 22: ... connected between mains and the unit 6 A connection of mains supply to a power socket requires the power socket to be nearby the unit 7 The unit might be supplied from IT mains The maximum nominal line to line voltage must not exceed 400 VAC 8 Incorrectly wired connections can destroy electrical and electronic components 9 To avoid corrosion at the connectors caused by electrochemical processes t...

Страница 23: ...e to the grounding connections provided at the cabinets of both the Node G and Extension Unit according to the following illustrations Do not use the grounding connections to connect external devices figure 3 6 Grounding bolt of Main and Extension Unit figure 3 7 Grounding a unit The PE cables must have a minimum cross section of 10mm2 ...

Страница 24: ...pply connection Each wire must observe the applicable national regulations regarding loop impedance voltage drop and methods of installation Make sure to connect the correct voltage to the unit Note Do not connect or disconnect the power cord at the mains connector while power is on Turn off mains power before connecting the power cord at the units then engage mains again Mains power must be inter...

Страница 25: ... to be considered when selecting the cable and antenna types Highly directional antennas with good front back ratios 40 dB is typical are recommended because they improve isolation and cell site selectivity Smaller diameter cables are less expensive and easier to install but have worse performance Tighten the 7 16 or N connectors ONLY by hand The use of pliers may cause damage to the connector and...

Страница 26: ...hanical commissioning and maintenance activities that require the unit to be powered on when open When opening the Node G do not damage the warranty labels on the internal devices The warranty is void if the seals are broken First remove the front cover plate by loosening the four front cover screws The M5 socket head cap screws are circle marked in the figure to the left Do not remove those screw...

Страница 27: ...3 Installation ID No 7164491 Page 27 Note Before closing the unit make sure that the mains power switch inside is set to ON figure 3 13 Position of mains power switch ...

Страница 28: ...User s Manual for Node G Network Elements Page 28 M0121A2A doc For your notes ...

Страница 29: ...e sent to the final amplifier summarized and combined with the downlink input signal in the DL IN duplexer In the downlink path a signal originating from the base station is separated from the uplink signal in the DL IN duplexer It is then amplified by an integrated low noise amplifier LNA and forwarded to the digital channel module DCM The signal will be divided in the DCM to the two channels of ...

Страница 30: ... G x30 as an example the following figure illustrates the positions of the RF components inside the Node G figure 4 2 RF path of a Node G x30 exemplary DL final amplifier Power supply unit Duplexer with LNA Digital channel module with integrated controller Duplexer UL IN DL IN ...

Страница 31: ...he direct path loss from one antenna to the other but reflections can contribute to or even affect antenna isolation Digital ICE cancels the signal from the primary feedback path thus allowing the gain of the network element to be increased The required delay resulting from the on site conditions is measured by the DCM module and set accordingly For software setting commands please refer to the on...

Страница 32: ... current gain isolation output level and receive signal strength indication RSSI values The RSSI provides controlling and monitoring of the receive level of a Node B DL RSSI or user equipment UL RSSI to a Node G It measures the level of the input signal by detecting the RF and converting the analogue level into a digital value The data are processed and evaluated by software A corresponding measur...

Страница 33: ...onfiguration can be seen at the configuration list which is part of the delivery and additionally as an electronic list accessible via software figure 4 3 Layout of a Node G 930 Downlink final amplifier Power supply unit UL Duplexer Digital channel module DL Duplexer EAC card Modem Battery Pack LEDs ...

Страница 34: ...ed forward amplifier It has a high output power while maintaining superior intermodulation and linearity performance figure 4 4 Node G x30 MCPA DL final amplifier For the Node G x38 an SCPA single carrier power amplifier is used This is a cartesian feedback amplifier for two channels The advantage of a SCPA is a higher output power per channel figure 4 5 Node G x38 SCPA DL final amplifier ...

Страница 35: ...it The power supply unit is mounted in the door of the Main Unit This device transforms mains power into a predefined DC voltage When performing maintenance ensure that all circuits are voltage free and that the Node G is disconnected from mains figure 4 6 Power supply ...

Страница 36: ...e between the modem and the terminal The following parameters should be set for a GSM modem Bit rate bit per second 9600 Baud Parity bit No parity Number of data bit 8 Bit Stopbit 1 Stopbit These settings may only be changed locally Should a different modem be used the operator should ensure that the settings are changed prior to leaving the site 4 3 3 1 Initstrings The initialization string depen...

Страница 37: ...stics may be acknowledged and collected in the OMC The modem is installed in the sidewall of the unit For technical data of the MC35 refer to chapter Specification Modem To replace the modem disconnect the cables and loosen the elastic band figure 4 7 Modem MC35 The modem output is connected to the modem coupler port of the DL IN duplexer figure 4 8 Cable from the modem to the DL IN duplexer ...

Страница 38: ...ation Finally it performs the interference cancellation algorithms which eliminate the normal problems associated with isolation and has an integrated controller for the entire Node G which maintains a web server for local and remote communication This process is accomplished by both analogue and digital means The DCM is able to amplify two channels for uplink and downlink The UL power amplifier i...

Страница 39: ...onnection from Laptop or PC figure 4 10 Establishing a local connection from laptop or PC to the DCM of the Main Unit To establish a local connection from laptop or PC to the Main Unit plug the cable in the DCM The standard Ethernet CAT5 cable will be supplied with the Main Unit ...

Страница 40: ...s will cease to work in case of power failure The battery pack is protected from deep discharge When performing preventive maintenance make sure that all circuits are voltage free by disconnecting the battery cable from the DCM In case of a power cycle it is sufficient to press the Battery disconnect button on the EAC card to interrupt the voltage supply After mains is connected again the battery ...

Страница 41: ... to disconnect the battery pack from the controller This forces a hard reset of the system Once disconnected the power to the controller will not be restored until the 24V supply is again operational figure 4 13 Position of the battery disconnect button on the EAC card of the Main Unit Battery disconnect button ...

Страница 42: ...iving path The pass band of the duplexer is the full band EGSM This allows the same Node G to be used regardless of its operator s frequency plan The UL and DL duplexers have multiple outputs including the primary and extension path plus forward and reverse probes used for auto setup VSWR and RSSI functions figure 4 14 Duplexer UL IN figure 4 15 Duplexer DL IN figure 4 16 Duplexers installed LNA L...

Страница 43: ... Main and Extension Units as well as general purpose housekeeping functions of the Main or Extension unit These functions are collection of the external alarms door alarm summary alarm distribution of the I2 C bus to the duplexers mains power DL final amplifier electronic door label EDL state of the LEDs figure 4 17 EAC card figure 4 18 EAC card installed ...

Страница 44: ...ion Unit is bad LED 2 shows a permanent yellow light when the battery backup is active LED 1 shows a permanent green light when the rechargeable battery is OK It blinks when the battery is fully charged and is in the trickle charge mode figure 4 19 Position of the LEDs on the EAC card of the Main Unit On the EAC card of the Extension Unit is only one LED which shows a permanent green light when po...

Страница 45: ... connecting the external devices by a wrong type of cable may result in a loss of the water proofness All external alarms are defaulted to high 5 VDC without connection This setting may be changed on the external alarm page to active high or active low The severity levels of the external alarms may be set via the web page More information about the external alarm settings is available in the web p...

Страница 46: ...the wires to be connected must be in the range from 0 14 1 5 mm2 Pin No 1 2 3 figure 4 22 Summary alarm relay The following table indicates the three connector pin out Pin No Contact Maximum Resistive Load 1 Open in alarm condition Max 1 A 50 VDC 2 Common Max 2 A 30 VDC 3 Closed in alarm condition Max 1 A 230 VAC table 4 2 Pin assignment of relay contacts figure 4 23 Relay contacts alarm condition...

Страница 47: ...nits that can be replaced without tuning or soldering work It is not recommended to replace any components inside the Node G itself except of batttery pack and Modem Note Defect parts should only be replaced by original parts from the supplier All interventions inside the housing are at one s own risk Note During maintenance ensure that the unit has been disconnected from mains To open the cabinet...

Страница 48: ...50 tbd 650 table 5 1 Specified torques for various screw types Note Depending on the configuration of the Node G the FRU can be equipped with a 50 Ω termination resistor In such a case use the termination resistor of the old FRU to terminate the respective connector of the replacement part Note After the replacement of a component check whether the system has to be levelled anew Note Do not forget...

Страница 49: ...bles Unscrew the five captive M4 socket head cap screws for the current version and or seven M4 socket head cap screws for the former version by which each power supply is fastened to the cabinet Use the captive screws to fasten the new power supply and reconnect all cables figure 5 1 Power supply screws ...

Страница 50: ... Pack figure 5 2 Battery connection to DCM Before removing the battery disconnect the battery cable from DCM Loosen the elastic band in the middle of the battery pack To install the new module proceed in reverse order figure 5 3 Location of battery pack figure 5 4 Battery pack ...

Страница 51: ...ovides visual equipment status information Green Normal operation condition Red Summary alarm Status LED off Check the cables to the external alarm connector Check power switch inside of the node Check mains cabling Check mains power figure 5 4 Status LED If the customer will not use the LED kit disconnect the three cables to the external alarm connector figure 5 5 Connection of the external alarm...

Страница 52: ...User s Manual for Node G Network Elements Page 52 M0121A2A doc For your notes ...

Страница 53: ...6 Illustrations ID No 7164491 Page 53 6 ILLUSTRATIONS 6 1 CABINET DRAWINGS figure 6 1 Cabinet of a Node G ...

Страница 54: ...User s Manual for Node G Network Elements Page 54 M0121A2A doc 6 2 LAYOUT figure 6 2 Layout of the Node G x30 exemplary ...

Страница 55: ...6 Illustrations ID No 7164491 Page 55 figure 6 3 Layout of the Node G x38 exemplaryx30 exemplary ...

Страница 56: ...User s Manual for Node G Network Elements Page 56 M0121A2A doc For your notes ...

Страница 57: ...cabinet 4 maximum GSM 38 0 2 channels EDGE 34 5 2 channels GSM 38 0 4 channels EDGE 34 5 4 channels Downlink power dBm GSM EDGE 29 0 2 6 channels using air combining Uplink power dBm GSM 27 5 2 6 channels 31 0 2 4 channels Output power step size dB 1 1 Output power accuracy dB 1 5 1 5 Minimum downlink input power at full output power dBm 60 60 Maximum input power dBm 10 10 Uplink noise figure dBm ...

Страница 58: ...e 7 16 DIN female RF connectors Optional N female N female Min antenna isolation for max gain t b d t b d All data is subject to change without notice 7 1 2 Mechanical Specification Node G Type 930 MU 938 MU Description ID No 7162640 ID No 7162642 Height width depth mm in 546 x 320 x 310 21 5 x 12 6 x 12 2 Weight kg lb 29 63 7 Cooling Natural convection All data is subject to change without notice...

Страница 59: ...annels EDGE 34 5 2 channels GSM 38 0 4 channels EDGE 34 5 4 channels Downlink power dBm GSM EDGE 29 0 2 6 channels using air combining Uplink power dBm GSM 27 5 2 6 channels 31 0 2 4 channels Output power step size dB 1 1 Output power accuracy dB 1 5 1 5 Minimum downlink input power at full output power dBm 60 60 Maximum input power dBm 10 10 Uplink noise figure dBm 6 0 6 0 Standard 6 0 6 0 Delay ...

Страница 60: ...ectors Optional N female N female Min antenna isolation for max gain t b d t b d All data is subject to change without notice 7 2 2 Mechanical Specification Node G Type 930 EU 938 EU Description ID No 7162641 ID No 7162643 Height width depth mm in 546 x 320 x 310 21 5 x 12 6 x 12 2 Weight kg lb 28 61 5 Cooling Natural convection All data is subject to change without notice 7 2 3 Environmental Spec...

Страница 61: ...8 minutes Charge time 4 5 hours Major features Battery charge HID battery voltage measurement trickle charge mode All data is subject to change without notice 7 4 MODEM Modem Service GSM GPRS Service connection Circuit switch Packet switch Physical connection RS232 USB only for separate use Power consumption 4 W average 10 W peak Connectors Data power RF ...

Страница 62: ...User s Manual for Node G Network Elements Page 62 M0121A2A doc For your notes ...

Страница 63: ...nt in this list is required please contact customer service for assistance Node G Type 930 MU 938 MU Description ID No 7162640 ID No 7162642 Accessory kit 7500193 Adapter 7 16 male N female 7112425 Battery Pack 7500045 Cabinet Q1 7163469 Combiner 3 way 800 960 7164105 Coupler 815 960 3dB 7164867 Cover 7163657 Dig Chan Mod UL DL 2 band 880 915 7162606 Digital Channel Dpx DL aktiv 880 915 925 960 71...

Страница 64: ...25 960 35 MHz 7162428 Cable bridge AWG28 7164844 Combiner 128 208 800 960 7164018 Combiner 4 way 800 960 7164102 Coupler 815 960 3 dB 7164867 Dig Chan Mod UL DL 2 band 876 915 7162607 EAC Card 7164756 7164755 Fin Ampl 921 960 32 dB 7164529 Memory board P3004 I C ADD 51 7164405 The manufacturer reserves the right to replace the parts listed above by equivalent substitutes ...

Страница 65: ...2 Grounding 23 H Health and Safety Warnings 9 HSN 31 I Installation Electrical 22 Mechanical 17 International Contact Addresses 11 Isolation 32 L Layout Node G 930 54 Total 33 LED Kit 51 LNA 42 Low Noise Amplifier 42 M Mains Power Switch 27 MAIO 31 Modem General 36 Initstrings 36 Wireless 37 Mounting Brackets 21 General 17 M10 Hexagon Head Screws 19 21 Pole 20 Wall 18 O Opening Cabinet 26 M5 socke...

Страница 66: ...Network Elements Page 66 M0121A2A doc Mechanical 60 Specifications Main Unit Electrical 57 Environmental 58 Mechanical 58 Status Information 32 Summary alarm Pin assignment 46 Summary Alarm 46 T Trickle Charge Mode 44 V VSWR 32 ...

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