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Airbridge DBS3900 CDMA Base Station 
Product Description 

4 Transmission and Networking of the BTS

 

Issue 11 (2010-06-18) 

Huawei Proprietary and Confidential         

Copyright © Huawei Technologies Co., Ltd.

4-3

 

Figure 4-2

 

Chain networking mode 

 

 

Advantages 

The chain networking mode helps reduce the costs of transmission equipment, of engineering 
construction, and of transmission link rental. 

Disadvantages 

z

 

Signals go through a large number of nodes, and therefore the line reliability is low. 

z

 

Faults in upper-level BTSs may affect the normal operation of lower-level BTSs. 

z

 

The number of chain levels cannot exceed three. 

4.3 Tree Networking Mode 

This section describes the application scenarios, advantages, and disadvantages of the tree 
networking mode. 

Application Scenarios 

The tree networking mode is applicable to areas where network structures, site distribution, 
and subscriber distribution are complicated, for example, areas where subscribers are widely 
distributed and hot spots gather.   

Figure 4-3

 shows the tree networking mode. 

Содержание Airbridge DBS3900

Страница 1: ...Airbridge DBS3900 CDMA Base Station V400R006C08 Product Description Issue 11 Date 2010 06 18 HUAWEI TECHNOLOGIES CO LTD ...

Страница 2: ... customer All or part of the products services and features described in this document may not be within the purchase scope or the usage scope Unless otherwise specified in the contract all statements information and recommendations in this document are provided AS IS without warranties guarantees or representations of any kind either express or implied The information in this document is subject ...

Страница 3: ... electrical specifications lightning protection performance and environmental requirements of the DBS3900 You can obtain a comprehensive understanding of the DBS3900 by reading this document Product Version The following table lists the product version related to this document Product Name Product Version DBS3900 CDMA V400R006C08 Intended Audience This document is intended for z Field engineers z ...

Страница 4: ...re added 03 2009 04 01 The modifications in this version are as follows z The contents related to the AC RRU3606 are added z The contents related to the CMPT 8 E1 are added z The contents related to the 450 MHz band classes supported by the DC RRU3606 are added 02 2008 08 10 The modifications in this version are as follows z The networking of the DBS3900 is deleted and the transmission and network...

Страница 5: ...orted by the BTS are the star networking mode chain networking mode and tree networking mode 5 Operation and Maintenance of the BTS This section describes the operation and maintenance of the BTS The operation and maintenance of the BTS refers to the management monitoring and maintenance of the BTS The BTS provides various methods and platforms for operation and maintenance to cater to different s...

Страница 6: ...Command arguments are in italics Items keywords or arguments in square brackets are optional x y Alternative items are grouped in braces and separated by vertical bars One is selected x y Optional alternative items are grouped in square brackets and separated by vertical bars One or none is selected x y Alternative items are grouped in braces and separated by vertical bars A minimum of one or a ma...

Страница 7: ... A means the three keys should be pressed concurrently Key 1 Key 2 Press the keys in turn For example pressing Alt A means the two keys should be pressed in turn Mouse Operation Action Description Click Select and release the primary mouse button without moving the pointer Double click Press the primary mouse button twice continuously and quickly without moving the pointer Drag Press and hold the ...

Страница 8: ...2 2 2 2 Indoor Distributed Installation of the DBS3900 2 3 2 3 Outdoor Centralized Installation of the DBS3900 2 4 2 4 Outdoor Distributed Installation of the DBS3900 2 6 3 Configuration Principles of the DBS3900 3 1 3 1 Configuration Principles of the BBU3900 3 1 3 2 Configuration Principles of the RRU3606 3 3 3 3 Configuration Principles of the Power Supply 3 3 3 4 Configuration Requirements of ...

Страница 9: ...Technical Specifications of the BBU3900 6 6 6 2 2 Technical Specifications of the RRU3606 6 7 6 3 Reliability Specifications of the DBS3900 6 9 6 4 Lightning Protection Specifications of the DBS3900 6 9 6 5 Safety Specifications of the DBS3900 6 10 6 6 EMC Specifications of the DBS3900 6 11 6 7 Environmental Specifications of the DBS3900 6 12 6 7 1 Storage Environment 6 12 6 7 2 Transportation Env...

Страница 10: ...gure 1 6 AC RRU3606 1 6 Figure 1 7 Logical structure of the RRU3606 1 13 Figure 1 8 Software structure of the BTS 1 14 Figure 2 1 Indoor Centralized Installation of the DBS3900 2 2 Figure 2 2 Indoor distributed installation 2 4 Figure 2 3 Outdoor centralized installation of the DBS3900 2 5 Figure 2 4 Outdoor distributed installation of the DBS3900 2 7 Figure 4 1 Star networking mode 4 2 Figure 4 2...

Страница 11: ...n band class 0 800 MHz 6 2 Table 6 2 Receive specifications in band class 0 800 MHz 6 2 Table 6 3 Transmit specifications in band class 1 1900 MHz 6 2 Table 6 4 Receive specifications in band class 1 1900 MHz 6 3 Table 6 5 Transmit specifications in band class 5 450 MHz 6 3 Table 6 6 Receive specifications in band class 5 450 MHz 6 3 Table 6 7 Transmit specifications in band class 14 1900 MHz 6 4 ...

Страница 12: ...ve substances in the transportation environment of the equipment 6 17 Table 6 25 Requirements for the concentration of chemically active substances in the transportation environment of the equipment 6 17 Table 6 26 Requirements for the mechanical stress in the transportation environment of the BBU 6 18 Table 6 27 Requirements for the mechanical stress in the transportation environment of the RRU 6...

Страница 13: ...d auxiliary equipment Figure 1 1 shows the hardware structure of the DBS3900 Figure 1 1 Hardware structure of the DBS3900 Functional Modules of the DBS3900 Functional Module Description BBU3900 Being the baseband unit of the DBS3900 this component is responsible for resource management operation and maintenance and environment monitoring of the system RRU3606 Being the remote RF module unit of the...

Страница 14: ... APM30 cabinet which is optional DCDU The DCDU is a power distribution box and supports one DC input and nine DC outputs EMUA The EMUA is an environment monitoring unit and implements monitoring for the site environment and user equipment For details on the functions of the EMUA see the EMUA User Guide SLPU The SLPU is a lightning protection unit which is used to configure the UELP and UFLP It imp...

Страница 15: ...protocol software operation and maintenance software and data center 1 1 Physical Structure of the DBS3900 This describes the physical structure of the DBS3900 which consists of the BBU3900 RRU3606 and auxiliary equipment Figure 1 2 shows the major functional modules of the DBS3900 Figure 1 2 Major functional modules of the DBS3900 Physical Structure of the BBU3900 Figure 1 4 shows the configurati...

Страница 16: ...cessing and provides clock signals for the BBU3900 LBBP LTE BaseBand Processing unit It is LTE BaseBand Processing unit It processes the baseband signals and Common Public Radio Interface CPRI signals UTRP Universal Extension Transmission Processing Unit It is the universal extension transmission processing unit It provides connection between the BBU3900 and the BSC and supports IP transmission ov...

Страница 17: ...ts 48 V DC or 24 V DC to 12 V DC and provides environment monitoring signal ports for the BBU3900 USCU Universal Satellite Card and Clock Unit It is the universal satellite card and clock unit It provides the input port for external signals including satellite clock signals and provides synchronization clock signals for the BBU3900 and for the RF modules connected to the BBU3900 Physical Structure...

Страница 18: ... and ports connected to other equipment 1 2 2 Physical Ports of the RRU3606 The physical ports of the RRU3606 include power ports transmission ports alarm ports grounding ports and RF ports The physical ports of the DC RRU3606 slightly different from those of the AC RRU3606 1 2 1 Ports on the BBU3900 The ports of the BBU3900 consist of the power ports transmission ports alarm ports reserved ports ...

Страница 19: ...ink FE optical port supporting optical cables a removable optical module is required USB 1 USB It is reserved TST 1 USB It is a clock test port ETH 1 RJ45 It is a commissioning port for local maintenance GPS 1 SMA It is used for GPS signal input E1 T1 1 DB44 It is a transmission port which is connected to the BSC and provides eight E1 T1 links FE0 1 RJ45 It is a transmission port which is connecte...

Страница 20: ...45 Debug FE GE0 and FE GE 2 RJ 45 Indicate Ethernet electrical ports which are used for connection to the transmission device or gateway GPS 1 SMA Receives GPS signals LMPT RST 1 Resets the BBU3900 LBBP CPRI0 to CPRI5 6 SFP connector Connecting to the LRRU LRFU RRU3606 or CRFU for transmitting service data clock signals and synchronization information Power port 1 3V3 It is used for DC input MON0 ...

Страница 21: ... FE1 OUTSIDE 2 RJ45 Each port provides four links for E1 T1 signal output and connects the transmission equipment and the BSC GPS port 1 SMA It is used for receiving GPS signals RGPS port 3 8 pin terminal block They are used for receiving RGPS signals BITS port 1 SMA It is connected to the BITS clock USCU0 TEST port 1 SMA It is used as the output end for the clock test GPS port 1 SMA It is used fo...

Страница 22: ... EXT ALM1 1 RJ45 Each port provides four links for dry contact alarm signal input There are totally eight links of dry contact alarm signals 1 2 2 Physical Ports of the RRU3606 The physical ports of the RRU3606 include power ports transmission ports alarm ports grounding ports and RF ports The physical ports of the DC RRU3606 slightly different from those of the AC RRU3606 Table 1 2 lists the phys...

Страница 23: ...onnector Communicat ion port for the RET antenna RET PWR_ SRXU Communication port for the RET antenna 1 DB9 connector The short circuit impedance of the alarm port is less than 0 2 kilohm and the open circuit impedance of the alarm port is more than 51 kilohms Table 1 3 lists the physical ports of the AC RRU3606 Table 1 3 Ports on the RRU3606 AC type Type Name Description Quantity Connector Type A...

Страница 24: ...logical structure of the RRU3606 which is used for up conversion and down conversion of signals and for power amplification 1 3 1 Functional Structure of the BBU3900 The BBU3900 implements system resource management operation and maintenance environment monitoring and service processing The BBU3900 performs the following functions z Providing external ports Providing the Abis interface and process...

Страница 25: ...er amplification for modulated transmitted signals and filtering the transmitted signals to make them meet the requirements of the air interface protocol z On the reverse link filtering the signals received by the antenna to suppress out band interference and then performing low noise amplification down conversion and channel selective filtering 1 4 Software Structure of the BTS This section descr...

Страница 26: ...ajor functions of the signaling protocol software are as follows z Radio network layer protocol processing z Transport network layer protocol processing z Managing the internal logical resources of the BTS for example cells and channels and implementing mapping between physical resources and logical resources Operation and Maintenance Software The operation and maintenance software works with the ...

Страница 27: ...n 1 Overall Structure of the DBS3900 Issue 11 2010 06 18 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 1 15 z Alarm management z Software management z Tracing management z Security management z Backup management z Log management ...

Страница 28: ...n makes it convenient for the operator to manage the spare components and versions in a centralized manner and to perform maintenance and upgrade in future 2 2 Indoor Distributed Installation of the DBS3900 This describes the indoor distributed installation of the DBS3900 In this mode the major modules are the BBU3900 and RRU3606 The BBU3900 supports 48 V DC input The DC RRU3606 supports 48 V DC i...

Страница 29: ...n is reduced 2 1 Indoor Centralized Installation of the DBS3900 This describes the indoor centralized installation of the DBS3900 In this mode the major modules are the BBU3900 and RRU3606 The BBU3900 supports 48 V DC input The DC RRU3606 supports 48 V DC input The AC RRU3606 supports 220 110 V AC input Installing the DBS3900 on the indoor centralized installation rack or L shaped support as a mac...

Страница 30: ...ot be installed on a rack in centralized mode z If the cabinet in the equipment room has enough free space the BBU3900 can be installed in the cabinet and the RRU3606 can be installed on a wall In this case the indoor centralized installation rack is not required and therefore the space in the equipment room is saved z The auxiliary devices should be configured according to the actual situation in...

Страница 31: ...3606 respectively The indoor centralized installation rack can be installed on the ground on a wall or in a piled way The L shaped support can be installed on the ground DCDU The DCDU is a DC power distribution box and supports one 48 V power input and multiple 48 V outputs z If the distance between the RRU3606 and the BBU3900 exceeds 70 m 229 66 ft independent power supply equipment needs to be c...

Страница 32: ... The BBU3900 can be installed in the APM30 and the RRU3606 can be installed on a wall or pole close to the RF antenna In this way the cost of network construction are reduced Installation Scenarios Figure 2 3 shows the outdoor centralized installation of the DBS3900 Figure 2 3 Outdoor centralized installation of the DBS3900 Auxiliary Device Table 2 3 lists the auxiliary devices used in the outdoor...

Страница 33: ...et powers the equipment z If the distance between the RRU3606 and the BBU3900 exceeds 70 m 229 66 ft independent power supply equipment needs to be configured for the RRU3606 z The auxiliary devices should be configured according to the actual situation and power input mode z The DC RRU3606 that works in 800 MHz AB and 450 MHz and the AC RRU3606 cannot be installed in centralized mode 2 4 Outdoor ...

Страница 34: ...able 2 4 Auxiliary devices used in the door distributed installation of the DBS3900 Component Description APM30 220 110 V AC type The APM30 of the 220 110 V AC type is an integrated power system that is used for outdoor applications and supports 220 110 V AC power input APM30 48 V DC type The APM30 of the 48 V DC type is an integrated power backup system that is used for outdoor applications and s...

Страница 35: ...tary and Confidential Copyright Huawei Technologies Co Ltd Issue 11 2010 06 18 z If the distance between the RRU3606 and the BBU3900 exceeds 70 m 229 66 ft independent power supply equipment needs to be configured for the RRU3606 z The auxiliary devices should be configured according to the actual situation and power input mode ...

Страница 36: ...configuration principles of the power supply to the DBS3900 3 4 Configuration Requirements of the RF Antennas This section describes the general requirements for the configuration of RF antennas In practice choose antennas according to the actual network planning solution 3 5 Configuration Principles of the Satellite Synchronization Antenna This describes the configuration principles of the satell...

Страница 37: ...5 forward channels and 256 reverse channels z HECM configuration You can configure a maximum of six HECMs Three SFP ports on the HECM are reserved for connecting hot swappable optical modules The QCU1HECM is configured with only one baseband processing chip CSM6800 which supports 192 subscribers The QCU4HECM is configured with one or two baseband processing chips CSM6850 each of which supports 284...

Страница 38: ...ciples of the RRU3606 The RRU3606 is the remote RF unit of the DBS3900 A single RRU3606 supports a maximum of eight carriers Configuration Principles z One RRU3606 supports one sector z The DC RRU3606 supports the 450 MHz 800 MHz 1900 MHz and AWS band classes z The AC RRU3606 support the 800 MHz A band classes z Generally three to six RRU3606s are configured for each DBS3900 3 3 Configuration Prin...

Страница 39: ... For omni directional cells use omni directional antennas z For directional cells use directional bi polarization antennas or directional uni polarization antennas according to the actual situation z For a large coverage area use antennas with a great amount of gain for omni directional cells or directional cells z For sector antenna configuration use directional antennas or omni directional anten...

Страница 40: ...pical configurations of the DBS3900 which supports the 450 MHz 800 MHz 1900 MHz and AWS band classes z The following configuration examples apply when the band class is 800 MHz the power supply is 220 V AC and the equipment is installed outdoors in distributed mode O 1 Configuration In the O 1 configuration the following components are configured z One BBU3900 z AMP30 z Storage battery cabinet opt...

Страница 41: ...vely referred to as the BTS 4 1 Star Networking Mode This section describes the application scenarios advantages and disadvantages of the star networking mode 4 2 Chain Networking Mode This section describes the application scenarios advantages and disadvantages of the chain networking mode 4 3 Tree Networking Mode This section describes the application scenarios advantages and disadvantages of th...

Страница 42: ...transmission is implemented directly between the BTS and the BSC and therefore signals do not have to go through many nodes In this way the reliability of the line is high Disadvantages The star networking modes require more transmission resources than other networking modes 4 2 Chain Networking Mode This section describes the application scenarios advantages and disadvantages of the chain network...

Страница 43: ...h a large number of nodes and therefore the line reliability is low z Faults in upper level BTSs may affect the normal operation of lower level BTSs z The number of chain levels cannot exceed three 4 3 Tree Networking Mode This section describes the application scenarios advantages and disadvantages of the tree networking mode Application Scenarios The tree networking mode is applicable to areas w...

Страница 44: ...ing mode is that the former lowers the costs of the transmission equipment the costs of engineering projects and the rental of transmission links Disadvantages z Signals travel through many nodes which cause low transmission reliability and construction and maintenance difficulties z Faults in upper level BTSs may affect the normal operation of lower level BTSs z Capacity expansion is difficult be...

Страница 45: ...intenance Modes of the BTS This section describes the operation and maintenance modes of the BTS The BTS can be maintained through the LMT through the centralized network management system or locally 5 2 Operation and Maintenance Functions of the BTS The OM system of the BTS supports equipment management software management configuration management service management performance management securit...

Страница 46: ...he LMT can be used to maintain the BTS through the operation and maintenance link provided by the Abis interface between the BSC and the BTS The LMT communicates with the BSC through a LAN Through the LMT you can perform operation and maintenance for the sites cells carriers channels and boards The LMT is used to configure and adjust the data of the BSC and BTS z Local maintenance The maintenance ...

Страница 47: ...on Management The functions involved in configuration management are as follows z Consistency checks for added deleted and Changed data of the BTS z Automatic data backup z Dynamic and static modes for data configuration In dynamic mode changes made to data take effect immediately In static mode changes made to data take effect after the BTS is reset Service Management The functions involved in se...

Страница 48: ... and supports audible or visual alarms The alarms can be subscribed to and forwarded to the mobile phones or pagers of maintenance personnel so that the maintenance personnel can handle the faults in time z Environment alarm management The BTS equipment rooms are generally unmanned and distributed across wide areas The equipment works in adverse environments and is subject to emergencies The BTS h...

Страница 49: ...00 This describes the reliability specifications of the DBS3900 6 4 Lightning Protection Specifications of the DBS3900 This describes the lightning protection specifications of the DBS3900 in terms of lightning specifications of the power input port E1 T1 input port GPS RF signal input port dry contact port and RF antenna port 6 5 Safety Specifications of the DBS3900 This describes the safety spec...

Страница 50: ...it and receive specifications of the DBS3900 in different band classes are as follows z Transmit and receive specifications in band class 0 Table 6 1 and Table 6 2 list the performance specifications in band class 0 800 MHz Table 6 1 Transmit specifications in band class 0 800 MHz Item Specification Operating band class 869 MHz to 894 MHz Channel bandwidth 1 2288 MHz Channel precision 30 kHz Frequ...

Страница 51: ...eiving sensitivity Better than 127 dBm main and diversity receiving at RC3 z Transmit and receive specifications in band class 5 Table 6 5 and Table 6 6 list the performance specifications in band class 5 450 MHz Table 6 5 Transmit specifications in band class 5 450 MHz Item Specification Operating band class 460 MHz to 470 MHz Channel bandwidth 1 2288 MHz Channel precision 25 kHz 20 kHz Frequency...

Страница 52: ...ecision 50 kHz Frequency tolerance 0 05 ppm Transmit power 60 W Table 6 8 Receive specifications in band class 14 1900 MHz Item Specification Operating band class 1850 MHz to 1915 MHz Channel bandwidth 1 2288 MHz Channel precision 50 kHz Signal receiving sensitivity Better than 127 dBm main and diversity receiving at RC3 z Receive and transmit specifications in band class 15 AWS Table 6 9 and Tabl...

Страница 53: ...tions in band class 15 AWS of LTE Table 6 11 Transmit specifications in band class 15 AWS of LTE Item Specification Operating band class 2110 MHz to 2155 MHz Channel bandwidth 5 MHz Channel precision 100 kHz Frequency tolerance 0 05 ppm Transmit power 60 W Table 6 12 Receive specifications in band class 15 AWS of LTE Item Specification Operating band class 1710 MHz to 1755 MHz Channel bandwidth 5 ...

Страница 54: ...5 x 10e 5 6 2 Physical and Electrical Specifications of the DBS3900 This describes the physical and electrical specifications of the DBS3900 6 2 1 Technical Specifications of the BBU3900 This section describes the technical specifications of the BBU3900 in terms of the working voltage power consumption weight dimensions and temperature and humidity in the running environment 6 2 2 Technical Specif...

Страница 55: ...ding the FAN and UPEU 8 kg 17 64 lb z Full configuration 12 kg 26 46 lb Cabinet dimensions height x width x depth 86 mm 3 39 in x 442 mm 17 40 in x 310 mm 12 20 in as shown in Figure 6 1 Temperature 10 C 14 F to 55 C 131 F Relative humidity 5 RH to 95 RH Figure 6 1 Dimensions of the BBU3900 6 2 2 Technical Specifications of the RRU3606 This describes the technical specifications of the RRU3606 in ...

Страница 56: ... 450 MHz band classes z 485 mm 19 09 in x 285 mm 11 22 in x 170 mm 6 69 in with the shell z 480 mm 18 90 in x 270 mm 10 63 in x 140 mm 5 51 in without the shell Dimensions of the RRU that works in other band classes z 485 mm 19 09 in x 285 mm 11 22 in x 170 mm 6 69 in with the shell z 480 mm 18 90 in x 270 mm 10 63 in x 140 mm 5 51 in without the shell Ambient temperature for operation 40o C 40o F...

Страница 57: ... Time Between Failures MTBF BBU3900 280000 hours RRU3606 260000 hours Mean Time To Repair MTTR 1 hour excluding the time needed for the engineers to arrive at the site 3 hours including the time needed for the engineers to arrive at the site 6 4 Lightning Protection Specifications of the DBS3900 This describes the lightning protection specifications of the DBS3900 in terms of lightning specificati...

Страница 58: ... antenna port Differential mode 8 kA 8 20 us Common mode 40 kA 8 20 us 6 5 Safety Specifications of the DBS3900 This describes the safety specifications of the DBS3900 The DBS3900 complies with the following safety standards z GB4943 2000 Safety of information technology equipment z IEC60950 Safety of information technology equipment Including Electrical Business Equipment z IEC60215 Safety requir...

Страница 59: ...for harmonic current emissions equipment input current 16 A z IEC 61000 3 3 Electromagnetic compatibility EMC Part 3 Limits Section 3 Limitation of voltage fluctuations and flicker in low voltage supply systems for equipment with rated current 16 A z IEC 61000 4 2 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 2 Electrostatic discharge immunity test z IEC 61000...

Страница 60: ...lecommunication equipment exposed to overvoltages and overcurrents Basic recommendation z ETS 300 253 1995 Equipment Engineering Earthing and bonding of telecommunication equipment in telecommunication centres z YD T5098 2005 Design specifications about the overvoltage protection engineering of the telecommunications office 6 7 Environmental Specifications of the DBS3900 This describes the require...

Страница 61: ...quipment indoors and ensure that No water accumulates on the ground or may drop onto the package of the equipment The equipment is kept away from devices that may leak water for example automatic fire fighting devices and heating devices z If the equipment has to be stored outdoors ensure that The package is intact Appropriate waterproofing measures are taken to prevent rainwater from entering the...

Страница 62: ...pended dust particle is not greater than 75 µm z The diameter of a precipitable dust particle is not smaller than 75 µm and not greater than 150 µm z The diameter of a piece of grit is not smaller than 150 µm and not greater than 1000 µm z The concentration of chemically active substances complies with the requirements listed in Table 6 20 Table 6 22 Requirements for the concentration of chemicall...

Страница 63: ...f the packed equipment to bear the weight from above in the stipulated stack method Table 6 24 Requirements for the mechanical stress in the storage environment of the RRU Item Sub item Range Offset 1 5 mm 0 06 in Acceleration 5 m s2 Sinusoidal vibration Frequency range 2 Hz to 9 Hz 9 Hz to 200 Hz Impact response spectrum II 250 m s2 Unsteady impact Static payload 5 kPa NOTE z The impact response ...

Страница 64: ...sportation environment of the equipment are as follows z The package is intact z Appropriate waterproofing measures are taken to prevent rainwater from entering the package z No water accumulates in the vehicle Biological Requirements The biological requirements for the transportation environment of the equipment are as follows z The environment is not conducive to the growth of microorganisms suc...

Страница 65: ...he diameter of a precipitable dust particle is not smaller than 75 µm and not greater than 150 µm z The diameter of a piece of grit is not smaller than 150 µm and not greater than 1000 µm z The concentration of chemically active substances complies with the requirements listed in Table 6 25 Table 6 27 Requirements for the concentration of chemically active substances in the transportation environm...

Страница 66: ...load 10 kPa NOTE z The impact response spectrum refers to the maximum acceleration response curve generated by the equipment under specified impact excitation Impact response spectrum II means that the duration of semi sine impact response spectrum is 6 ms z The static payload refers to the capability of the packed equipment to bear the weight from above in the stipulated stack method Table 6 29 R...

Страница 67: ...ments biological requirements and requirements for air purity and mechanical stress Climatic Requirements Table 6 28 lists the climatic requirements for the running environment of the equipment Table 6 30 Climatic requirements for the running environment of the equipment Item Range Temperature BBU 10 C 14 F to 55 C 131 F RRU 40 C 40 F to 52 C 125 6 F solar radiation not considered Temperature chan...

Страница 68: ... mechanically active substances in the running environment of the equipment Mechanically Active Substance Unit Concentration Dust particles Particles m3 3 x 104 no visible dust accumulated on desktops within three days The diameter of a dust particle is not smaller than 5 µm z The concentration of chemically active substances complies with the requirements listed in Table 6 30 and Table 6 31 Table...

Страница 69: ...ion 10 0 m s2 Sinusoidal vibration Frequency range 2 Hz to 9 Hz 9 Hz to 200 Hz Impact response spectrum II 100 m s2 Unsteady impact Static payload 0 NOTE z The impact response spectrum refers to the maximum acceleration response curve generated by the equipment under specified impact excitation Impact response spectrum II means that the duration of semi sine impact response spectrum is 6 ms z The ...

Страница 70: ... Item Sub Item Range NOTE z The impact response spectrum refers to the maximum acceleration response curve generated by the equipment under specified impact excitation Impact response spectrum II means that the duration of semi sine impact response spectrum is 6 ms z The static payload refers to the capability of the packed equipment to bear the weight from above in the stipulated stack method ...

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