4RF Aprisa SR Plus, Product Description

Page 1: ...January 2014 Version 1 1 6 ...

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Page 3: ...uropean Commission s RoHS Restriction of Certain Hazardous Substances in Electrical and Electronic Equipment and WEEE Waste Electrical and Electronic Equipment environmental directives Restriction of hazardous substances RoHS The RoHS Directive prohibits the sale in the European Union of electronic equipment containing these hazardous substances lead cadmium mercury hexavalent chromium polybromina...

Page 4: ...hin the environmental profile defined by EN 300 019 Class 3 4 Operation outside these criteria may invalidate the authorizations and or license conditions The term Radio with reference to the Aprisa SR User Manual is a generic term for one end station of a point to multipoint Aprisa SR network and does not confer any rights to connect to any public network or to operate the equipment within any te...

Page 5: ...6 902 MHz 12 5 kHz 25 kHz 12 VDC Part 90 Pending 896 902 MHz 12 5 kHz 25 kHz 50 kHz 12 VDC Part 24 Pending 928 960 MHz 12 5 kHz 25 kHz 50 kHz 12 VDC Part 24 and Part 101 Pending NOTE This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interfere...

Page 6: ...ing 400 470 MHz 12 5 kHz 25 kHz 12 VDC RSS 119 6772A SQ400M131 896 902 MHz 12 5 kHz 25 kHz 12 VDC RSS 119 Pending 896 902 MHz 12 5 kHz 25 kHz 50 kHz 12 VDC RSS 134 Pending 928 960 MHz 12 5 kHz 25 kHz 50 kHz 12 VDC RSS 119 and RSS 134 Pending Compliance Hazardous Locations Notice This product is suitable for use in Class 1 Division 2 Groups A D hazardous locations or non hazardous locations The fol...

Page 7: ... methodology of FCC s OST OET Bulletin number 65 2 Reference levels as given in Annex III European Directive on the limitation of exposure of the general public to electromagnetic fields 0 Hz to 300 GHz 1999 519 EC These distances will ensure indirect compliance with the requirements of EN 50385 2002 Frequency MHz Maximum Power dBm Note 1 Maximum Antenna Gain dBi Minimum Separation Distance m 135 ...

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Page 9: ...ity 17 Interfaces 18 Antenna Interface 18 Ethernet Interface 18 RS 232 Interface 18 USB Interfaces 18 Protect Interface 18 Alarms Interface 18 Mounting 19 DIN Rail Mounting 19 Rack Shelf Mounting 21 Wall Mounting 22 2 Product Options 23 Interface Ports 23 Protected Station 24 Protected Ports 24 Operation 25 Switch Over 25 Configuration Management 25 Data Driven Protected Station 26 Operation 26 Du...

Page 10: ...al 43 Compliance 44 4 Management 45 SuperVisor 45 Viewing the Aprisa SR Terminal Settings 46 Configuring the Aprisa SR Terminal Details 47 Configuring the Aprisa SR RF Network Details 47 Configuring the Aprisa SR Radio Settings 48 Command Line Interface 49 SNMP 49 LED Display Panel 50 Normal Operation 50 Single Radio Software Upgrade 51 Network Software Upgrade 51 Test Mode 51 5 Applications 52 Ba...

Page 11: ...op Transmission 58 Adaptive Coding Modulation 59 Network Layer 60 Packet Routing 60 Static IP Router 61 Bridge Mode with VLAN Aware 63 VLAN Bridge Mode Description 64 Avoiding Narrow Band Radio Traffic Overloading 66 Product Architecture 68 Aprisa SR Radio Block Diagram 69 Aprisa SR Protected Station Block Diagram 69 7 Contact Us 70 ...

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Page 13: ...oviding secure narrowband wireless data connectivity for SCADA infrastructure and telemetry applications The radios carry a combination of serial packet data and Ethernet data between the base station repeater stations and remote stations The Aprisa SR is configurable as a point to multipoint base station a remote station or a repeater station ...

Page 14: ...emote repeater stations The practical limit of remote repeater stations that can operate with one base station is determined by a range of factors including the number of services the packet sizes the protocols used the message types and network timeouts Automatic Registration On start up the remote station transmits a registration message to the base stations which responds with a registration re...

Page 15: ...rioritize and handle the VLAN traffic types L2 3 4 filtering for security and avoiding narrow band radio network overload L3 Router mode with standard static IP route for simple routing network integration L2 Bridge mode with VLAN aware for standard Industrial LAN integration Ethernet header and IP TCP UDP ROCH header compression to increase the narrow band radio capacity Ethernet and serial paylo...

Page 16: ...mperature range Usability Configuration diagnostics via front panel Management Port USB interface Ethernet interface Built in webserver SuperVisor with full configuration diagnostics and monitoring functionality including remote station configuration diagnostics over the radio link LED display for on site diagnostics Dedicated alarm port Software upgrade and diagnostic reporting via the host port ...

Page 17: ...apacity This table defines the modulation order based on gross capacity Modulation FEC Coding Capacity QPSK High Gain Max Coded FEC Minimum QPSK Low Gain Min Coded FEC 16QAM High Gain Max Coded FEC QPSK No FEC 16QAM Low Gain Min Coded FEC 16QAM No FEC 64QAM High Gain Max Coded FEC 64QAM Low Gain Min Coded FEC Maximum This table defines the modulation order based on receiver sensitivity Modulation ...

Page 18: ...oprietary wireless channel access ARQ segmentation VLAN aware Ethernet bridge Network Standard IP Proprietary automatic radio routing table population algorithm Transport TCP UDP Application HTTPS web management access through base station with proprietary management application software including management of remote stations over the radio link SNMPv1 2 3 for network management application softw...

Page 19: ...n FIPS PUB 197 AES encryption using Rijndael version 3 0 Data authentication NIST SP 800 38C Cipher Block Chaining Message Authentication Code CBC MAC based on RFC 3610 using Advanced Encryption Standard AES Data payload security CCM Counter with CBC MAC integrity NIST special publication 800 38C Secured management interface protects configuration L2 L3 L4 Address filtering enables traffic source ...

Page 20: ... RJ45 connector Optional 1x RS 232 asynchronous port using USB host port with USB to RS 232 converter Used for RS 232 asynchronous user traffic only USB Interfaces 1 x Management port using USB micro type B connector Used for product configuration with the Command Line Interface CLI 1 x Host port using USB standard type A connector Used for software upgrade and diagnostic reporting Protect Interfa...

Page 21: ...osure for mounting Mounting options include DIN rail mounting with the Aprisa SR DIN Rail Mounting Bracket Rack shelf mounting Wall mounting Outdoor enclosure mounting DIN Rail Mounting The Aprisa SR has an optional accessory to enable the radio to mount on a standard DIN rail Part Number Part Description APSB MBRK DIN 4RF SR Acc Mounting Bracket DIN Rail ...

Page 22: ...ted in four positions on a horizontal DIN rail Vertical Mount vertical enclosure perpendicular to the mount Horizontal Mount horizontal enclosure perpendicular to the mount Flat Vertical Mount vertical enclosure parallel to the mount Flat Horizontal Mount horizontal enclosure parallel to the mount ...

Page 23: ...risa SR enclosure base The following picture shows two Aprisa SR radios mounted on 1 RU rack mount shelf Part Number Part Description APSB MR19 X1U 4RF SR Acc Mounting 19 Rack Mount Shelf 1U WARNING If the Aprisa SR is operated in an environment where the ambient temperature exceeds 50 C the Aprisa SR convection air flow over the heat sinks must be considered ...

Page 24: ...Introduction Aprisa SR Product Description Wall Mounting The Aprisa SR can be mounted on a wall using the two holes through the enclosure 5 2 mm diameter Typically M5 screws longer than 35 mm would be used ...

Page 25: ...binations of Ethernet and RS 232 serial The product shown below is the two Ethernet ports plus two RS 232 serial ports Interface Port Option Part Number 4 Ethernet ports and no RS 232 serial ports APSQ N400 SSC HD 40 ENAA 3 Ethernet ports and 1 RS 232 serial port APSQ N400 SSC HD 31 ENAA 2 Ethernet ports and 2 RS 232 serial ports APSQ N400 SSC HD 22 ENAA ...

Page 26: ...tive radio The Aprisa SR radios can be any of the currently available Aprisa SR radio frequency bands channel sizes or interface port options The Aprisa SR Protected Station can operate as a base station repeater station or remote station The protection behaviour and switching criteria between the active and standby radios is identical for the three configurations By default the Aprisa SR Protecte...

Page 27: ...h Over The switch over to the standby radio can be initiated automatically on fault detection or manually via the Hardware Manual Lock switch on the Protection Switch or the Software Manual Lock from SuperVisor Additionally it is possible to switch over the radios remotely without visiting the station site via the remote control connector on the front of the Protection Switch Configuration Managem...

Page 28: ...dio and the right hand radio B designated as the secondary radio Each radio is configured with its own unique IP and MAC address and the address of the partner radio On power up the primary radio will assume the active role and the secondary radio will assume the standby role If for some reason only one radio is powered on it will automatically assume the active role Operation In normal operation ...

Page 29: ...ounting brackets and screws 1x Duplexer 2x TNC to SMA right angle 590mm cables Part Number Part Number APSB KDUP 300 A1 4RF SR Acc Kit Duplexer 320 400 MHz s 5 MHz p 0 5 MHz ext APSB KDUP 400 B1 4RF SR Acc Kit Duplexer 400 470 MHz s 5 MHz p 0 5 MHz ext APSB KDUP 450 M0 4RF SR Acc Kit Duplexer 450 520 MHz s 5 MHz p 0 5 MHz ext APSB KDUP 900 G2 4RF SR Acc Kit Duplexer 928 960 MHz s 9 MHz p 1 MHz ext...

Page 30: ...le right angle 590mm cable Part Number Part Number APSB KDUP VHF R2 4RF SR Acc Kit Duplexer 152 175 MHz s4 6 MHz p100 kHz High APSB KDUP VHF R3 4RF SR Acc Kit Duplexer 152 175 MHz s6 8 MHz p100 kHz High APSB KDUP VHF R4 4RF SR Acc Kit Duplexer 152 175 MHz s8 10 MHz p100 kHz High APSB KDUP VHF R5 4RF SR Acc Kit Duplexer 138 156 MHz s4 6 MHz p100 kHz Low APSB KDUP VHF R6 4RF SR Acc Kit Duplexer 138 ...

Page 31: ... support for these USB serial converters Other USB serial converters may not operate correctly USB RS 232 operation The USB serial converter buffers the received data frames into 64 byte blocks separated by a small inter frame gap For the majority of applications this fragmentation of egress frames is not an issue However there are some applications that may be sensitive to the inter frame gap the...

Page 32: ...Hz 320 400 MHz 6 250 kHz ETSI FCC IC Compliant Broadcast Band Frequency Band Frequency Tuning Range Synthesizer Step Size VHF 135 MHz 1 135 175 MHz 2 5 kHz UHF 400 MHz 400 470 MHz 6 250 kHz ETSI FCC Compliant Broadcast Band Frequency Band Frequency Tuning Range Synthesizer Step Size UHF 450 MHz 1 450 520 MHz 6 250 kHz FCC IC Compliant Broadcast Band Frequency Band Frequency Tuning Range Synthesize...

Page 33: ... 0 kbit s 40 0 kbit s 19 2 kbit s Minimum Coded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 52 0 kbit s 23 1 kbit s 11 6 kbit s 8 4 kbit s 25 kHz 103 9 kbit s 46 2 kbit s 23 1 kbit s 16 7 kbit s Maximum Coded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 45 6 kbit s 17 3 kbit s 8 7...

Page 34: ...s 32 0 kbit s 19 2 kbit s Minimum Coded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 46 8 kbit s 20 8 kbit s 10 4 kbit s 8 4 kbit s 25 kHz 83 1 kbit s 37 0 kbit s 18 5 kbit s 16 7 kbit s Maximum Coded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 41 0 kbit s 15 6 kbit s 7 8 kbit s 4...

Page 35: ...ded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 52 0 kbit s 23 1 kbit s 11 6 kbit s 8 4 kbit s 25 kHz 83 1 kbit s 37 0 kbit s 18 5 kbit s 16 7 kbit s 50 kHz 187 1 kbit s 83 2 kbit s 41 6 kbit s 33 4 kbit s Maximum Coded Forward Error Correction Channel Size Gross Radio Capacity less FEC 64 QAM 16 QAM QPSK 4 CPFSK 12 5 kHz 45 6 kbit s 17 3...

Page 36: ...FEC 115 dBm 112 dBm 109 dBm BER 10 2 4 CPFSK Max coded FEC NA NA NA BER 10 2 4 CPFSK Min coded FEC 117 dBm 114 dBm 111 dBm BER 10 2 4 CPFSK No FEC 115 dBm 112 dBm 109 dBm BER 10 6 64 QAM Max coded FEC 103 dBm 99 dBm 96 dBm BER 10 6 64 QAM Min coded FEC 101 dBm 97 dBm 94 dBm BER 10 6 64 QAM No FEC 96 dBm 92 dBm 89 dBm BER 10 6 16 QAM Max coded FEC 110 dBm 107 dBm 104 dBm BER 10 6 16 QAM Min coded F...

Page 37: ...6 QAM 19 dB 19 dB 19 dB BER 10 2 QPFK 12 dB 12 dB 12 dB BER 10 2 4 CPFSK 17 dB 17 dB 17 dB ETSI FCC IC Compliant Intermodulation Response Rejection 12 5 kHz 25 kHz 50 kHz FCC IC only Intermodulation response rejection 35 dBm 35 dBm 35 dBm BER 10 2 64 QAM 55 dB 55 dB 55 dB BER 10 2 16 QAM 55 dB 55 dB 55 dB BER 10 2 QPFK 60 dB 60 dB 60 dB BER 10 2 4 CPFSK 65 dB 65 dB 65 dB ETSI FCC IC Compliant Bloc...

Page 38: ... IC only Spurious response rejection 32 dBm 32 dBm 32 dBm BER 10 2 64 QAM 58 dB 58 dB 58 dB BER 10 2 16 QAM 58 dB 58 dB 58 dB BER 10 2 QPFK 63 dB 63 dB 63 dB BER 10 2 4 CPFSK 70 dB 70 dB 70 dB ETSI FCC IC Compliant Receiver Spurious Radiation 12 5 kHz 25 kHz 50 kHz FCC IC only Receiver spurious radiation 57 dBm 57 dBm 57 dBm ...

Page 39: ...acent channel power 60 dBc Transient adjacent channel power 60 dBc Spurious emissions 37 dBm Attack time 1 5 ms Release time 0 5 ms Data turnaround time 2 ms Frequency stability 1 0 ppm 0 1 ppm The 220 896 928 MHz products have a frequency stability option of 0 1 ppm Frequency aging 1 ppm annum Modem Forward Error Correction Variable length concatenated Reed Solomon plus convolutional code Adaptiv...

Page 40: ...neral Interface RJ45 x 2 Integrated 2 port switch Cabling CAT 5 6 UTP supports auto MDIX Standard Ethernet Maximum line length 100 metres on cat 5 or better Bandwidth allocation The Ethernet capacity maximum is determined by the available radio link capacity Maximum transmission unit Option setting of 1522 or 1536 octets Address table size 1024 MAC addresses Ethernet mode 10Base T or 100Base TX Fu...

Page 41: ...ral Interface ITU T V 24 EIA TIA RS 232E Interface direction DCE only Maximum line length 10 metres dependent on baud rate Async parameters Standard mode data bits 7 or 8 bits Standard mode parity Configurable for None Even or Odd Standard mode stop bits 1 or 2 bits Interface baud rates 300 1200 2400 4800 9600 19200 38400 57600 and 115200 bit s Control signals DCE to DTE CTS RTS DSR DTR Diagnostic...

Page 42: ...DC Maximum input current limit 10 mA Alarm Outputs The alarm connector provides two hardware alarm outputs for alarm reception from other radios in the network Interface RJ45 connector Output type Non isolated ground referenced open collector output Maximum applied voltage 30 VDC Maximum drive current 100 mA Overload protection Thermally resettable fuse Protect Interface The Protect interface is u...

Page 43: ...pin male screw fitting 39526 4002 Aprisa SR Protected Station Nominal voltage 13 8 VDC negative earth Absolute input voltage range 10 to 30 VDC Maximum power input 35 W Connector 2x Molex 2 pin male screw fitting 39526 4002 Aprisa SR Data Driven Protected Station Nominal voltage 13 8 VDC negative earth Absolute input voltage range 10 to 30 VDC Maximum power input 35 W Connector 2x Molex 2 pin male...

Page 44: ... Protected Station and Aprisa SR Data Driven Protected Station Mode Power Consumption 10 W radios with 4 CPFSK modulation Transmit Receive 42 W for 10 W transmit power 32 0 W for 1 W transmit power Receive only 15 W Power Dissipation Aprisa SR Radio Transmit Power Power Dissipation 10 W radio with 4 CPFSK modulation 10 W transmit power 25 W 1 W transmit power 24 W Aprisa SR Protected Station and A...

Page 45: ...anical Aprisa SR Radio Dimensions Width 210 mm 8 27 Depth 130 mm 5 12 and 146 mm 5 748 with TNC connectors Height 41 5 mm 1 63 Weight 1 25 kg 2 81 lbs Colour Matt black Mounting Wall 2 x M5 screws Rack shelf 2 x M4 screws DIN rail bracket Aprisa SR Protected Station Dimensions Width 432 6 mm 17 Depth 372 mm 14 6 and 388 mm 15 276 with TNC connectors Height 2U plus external duplexer if used Weight ...

Page 46: ...io Services EMC 47CFR part 15 Radio Frequency Devices EN 301 489 Parts 1 4 Safety EN 60950 1 2006 Class 1 div 2 for hazardous locations Environmental ETS 300 019 Class 3 4 Ingress Protection code IP51 IC Radio RSS 119 RSS 134 EMC This Class A digital apparatus complies with Canadian standard ICES 003 Cet appareil numérique de la classe A est conforme à la norme NMB 003 du Canada Safety EN 60950 1 ...

Page 47: ...Visor are Full element management configuration and diagnostics Manage the entire network from the Base Station remote management of elements Managed network software distribution and upgrades Performance and alarm monitoring of the entire network including RSSI alarm states time stamped events View and set standard radio configuration parameters including frequencies transmit power channel access...

Page 48: ...46 Management Aprisa SR Product Description Viewing the Aprisa SR Terminal Settings The SuperVisor software enables operators to view the terminal settings ...

Page 49: ...isa SR RF Network Details The SuperVisor software enables operators to set the RF Network Details including Network ID Sets the network ID of this base station node and its remote nodes Four hex chars Network Radius Sets the maximum number of hops in this network Network Repeaters Proximity Sets the proximity of repeaters in this network Inband Management Enables inband management of remotes repea...

Page 50: ...quency in MHz Channel Size Sets the channel size 12 5 kHz 25 kHz or 50 kHz depending on variant Antenna Port Configuration Sets the antenna port configuration to single port or dual port Modulation Type Sets the fixed TX Modulation Type for the base station radio ACM Control Enables disables Adaptive Code Modulation for the remote to base direction of transmission upstream Modulation Range Sets th...

Page 51: ...sor and the Command Line Interface the Aprisa SR network can also be managed using the Simple Network Management Protocol SNMP agent MIB files are supplied which can be used by a dedicated SNMP Manager such as Castle Rock s network management system to support effective and flexible network monitoring and diagnostics Alternatively the user can use its own 3rd party NMS SNMP agent to manage the SR ...

Page 52: ...n Radio not connected to a base station Solid Orange Alarm present with Warning Severity Stand by radio in protected station Device detect on the USB host port single flash Flashing Orange Diagnostics Function Active OTA Firmware Distribution Tx Data or Rx Data on the USB management or host port Flashing Green RF path TX is active RF path RX is active Solid Green Power on and functions OK and no a...

Page 53: ...running RX to OK LEDs Software upgrade completed successfully the OK LED solid orange Software upgrade failed any LED flashing red during the upgrade Network Software Upgrade During a network software upgrade the MODE LED flashes orange on the base station and all remote stations Test Mode In Test Mode the LED Display panel presents a real time visual display of the RSSI This can be used to adjust...

Page 54: ...ater application Basic point to multipoint application Single base station with Ethernet SCADA data inputs to multiple geographically remote sites with Ethernet RTUs requiring control and data acquisition The base station receives Ethernet frames from the SCADA server LAN and broadcasts all Ethernet frames to all remote stations Each remote site receives Ethernet frames from the RTU and unicasts o...

Page 55: ...ceives Ethernet frames from the SCADA server LAN and broadcasts all Ethernet frames to the repeater and its remote stations Three remote sites have direct radio communication with the base station but the other two remote sites operate via the repeater site Each remote site receives Ethernet frames from the RTU and unicasts over the air to the repeater base station The base station and the repeate...

Page 56: ...equiring control and data acquisition The base station receives Ethernet RS 232 frames from the SCADA servers and broadcasts all frames to all remote stations Each remote site receives Ethernet RS 232 frames from the RTU and unicasts over the air to the base station The base station uses an omni directional antenna to provide wide coverage and the remote stations are fitted with directional Yagi a...

Page 57: ...to the Base Station which will drop the duplicate packet as this packet is its own forward Repeater 2 will store and forward the packet to the local Ethernet port to RTU 3 which will drop the packet due to destination address mismatch and it will also re transmit the packet OTA to Repeater 3 Remote 1 and back to Repeater 1 which will drop the duplicate packet as this packet is its own forward Remo...

Page 58: ...tion all packets from a remote are destined to the base station The Repeater Station will store and forward the message received from Remote 1 and re transmit the message to Base Station but it will also be received by Remote 2 Since Remote 2 is not the destination and packet filtering is set to automatic enabled the packet will be dropped by Remote 2 Note Remote 3 and Remote 4 can t hear the Repe...

Page 59: ...d radio Data is sent over the wireless channel in discrete packets frames separated in time The PHY demodulates data within these packets with coherent detection The Aprisa SR PHY provides carrier symbol and frame synchronization predominantly through the use of preambles This preamble prefixes all packets sent over the wireless channel which enables fast Synchronization Data Link Layer MAC layer ...

Page 60: ...messages is significantly reduced Should collisions occur these are resolved using a random back off and retry mechanism As the base station controls all data transactions multiple applications can be effectively handled including a mixture of polling and report by exception Listen Before Send The Listen Before Send channel access scheme is realized using Carrier Sense Multiple Access CSMA In this...

Page 61: ...ation coding and FEC code rate in the remote to base direction of transmission over the defined modulation range based on the signal quality for each individual remote radio When the RF path is healthy no fading modulation coding is increased and the FEC code rate is decreased to maximize the data capacity If the RF path quality degrades modulation coding is decreased and the FEC code rate is incr...

Page 62: ...ng Ethernet packet on the Ethernet port is stripped from its Ethernet header to reveal the IP packet and to route the IP packet based on its routing table If the destination IP address is one of the RTUs the packet is then forwarded to the wireless ports and broadcasted as a PMP wireless packet to all the repeater remotes stations The appropriate remote then routes the IP packet and forwards it ba...

Page 63: ...e static routes to build change the routes in the network which might be tedious and introduce significant human error The Aprisa SR works as a static IP router without using any routing protocol and therefore does not have the overhead of a routing protocol for better utilization of the narrow bandwidth network In addition to the semi automated routes the user can manually add remove routes in th...

Page 64: ...and its routing table When the user changes the remote repeater station IP address subnet a re registration process in the base station then auto updates its routing table accordingly Terminal Server Transition to Converged Ethernet IP Network Customers that are transitioning their SCADA network to an Ethernet IP SCADA network can simultaneously operate their legacy serial RTUs not as a separate s...

Page 65: ...ts through the terminal server function Within the Aprisa SR Bridge mode each incoming Ethernet packet is inspected for the destination MAC address and VLAN and looks up its FDB table for information on where to send the specific Ethernet frame If the FDB table doesn t contain the specific MAC address it will flood the Ethernet frame out to all ports in the broadcast domain and when using VLAN the...

Page 66: ...nd flushed automatically after aging period VLANs are statically configured by the user on the ports where a Virtual LAN is required across the radio network An example of VLAN isolation of traffic type is shown in the figure below where RTUs 1 4 and 6 together with SCADA meter master form a Virtual LAN which is isolated from the other devices even though they are on the same physical network VLAN...

Page 67: ...e Aprisa SR base station carrying VLAN ID 1 20 30 and 40 VLAN Manipulation Add Remove VLAN Tags In order to support double VLAN and different device types connected to the Aprisa SR e g switches RTUs etc which can be VLAN tagged or untagged plain Ethernet devices add remove VLAN manipulation is required In an Aprisa SR VLAN tagged network a remote Aprisa SR connected to a plain RTU without VLAN su...

Page 68: ...does not meet the filtering criteria will not be transmitted over the radio link 3 L2 Port VLANs Ingress Filtering and QoS Double VLAN Bridge Mode Double VLAN is used to distinguish segregate between different radio sub networks Base repeaters remotes Traffic with double VLANs which are not destined to a specific sub network will be discarded on the ingress of the radio sub network avoiding the ov...

Page 69: ...o one of the four queues The Background Bulk Data Transfer Rate sets the data transfer rate high medium low for large amounts of management data 6 Ethernet Packet Time to Live Another aspect of avoiding overload radio network is the Ethernet packet TTL which is used to prevent old redundant packets being transmitted through the radio network This sets the time an Ethernet packet is allowed to live...

Page 70: ...ster ramping and settling times with less error Tx turn on time limited primarily by PA ramping Robust closed loop power control fast accurate power ramp up and down Highly rugged N Channel RF Power LDMOS transistors for the power amplifier High efficiency 50 PAE at 10W Very low thermal resistance 1 0 C W Direct IQ down conversion Excellent Intermodulation distortion characteristics as channel fil...

Page 71: ...Product Architecture 69 Aprisa SR Product Description Aprisa SR Radio Block Diagram Aprisa SR Protected Station Block Diagram ...

Page 72: ...upport or your local 4RF representative Our area representative contact details are available from our website 4RF Limited 26 Glover Street Ngauranga PO Box 13 506 Wellington 6032 New Zealand Email address support 4rf com Website www 4rf com Phone number 64 4 499 6000 Fax number 64 4 473 4447 Attention Customer Services ...