Ceragon Networks GNT-FA1500-28 Point-to-Point digital radio User Manual FibeAir cover

Ceragon Networks Ltd. Point-to-Point digital radio FibeAir cover

chapter 2

Revision 2.0 System Block Diagram 2-12.1. System Block DiagramThis chapter presents FibeAir 1500 basic principles of operation. TheFibeAir 1500 design concept is based on universal radio architecture.A radio link consists of two FibeAir 1500 terminals. Each terminal includesthree major LRU’s, IDU, ODU and the Antenna. A single cable, carryingcommunications and DC power, interconnects the IDU with the ODU.Figure 2-1 presents FibeAir 1500 main blocks and modules.Figure 2-1 FibeAir 1500 System Block Diagram
Chapter 2. Theory of Operation FibeAir 1500 Installation & Operation Manual2-2 In Door Unit (IDU) Revision 2.02.2. In Door Unit (IDU)The IDU is a compact, 17” wide, 1U-high unit, mount compatible for bothETSI and ANSI standard racks. The IDU modulates/demodulates the155Mbps Sonet/SDH payloads, manages local and remote units, providesI/O line alarms, and provides interfaces for 1.544/2.048 Mbps Waysidechannel, 64Kbps User channel and 64Kbps Order Wire channel.The IDU also interfaces a Local Maintenance Terminal or NetworkManagement System. In addition, status alarms and indicators are providedon the front panel.The IDU major modules: n Multiplexer n Modem n Manager Card n Cable Interface n Power Supply2.2.1. MultiplexerThe Mux module functions as a Sonet/SDH Regenerator. On the line side itinterfaces the OC-3/STM-1 stream, and on the radio side the Modemmodule.As a regenerator, the MUX either terminates or regenerates theOC-3/STM-1 RSOH. In one direction, the OC-3/STM-1 stream, interfacingthrough the MUX’s Rx line input terminates and the resulting stream istransmitted to the Modulator in the Modem module.In the opposite direction, the stream coming from the Modem’sDemodulator, undergoes OC-3/STM-1 Regeneration in the MUX, andtransmitted through the MUX’s Tx line output.In addition, the MUX module uses the OC-3/STM-1 SOH bytes to supportother services: 1.544/2.048 Mbps Wayside channel and management, 64Kbps User Channel and Order Wire channel.The MUX module may be configured via software for transparency of mostof the SOH bytes for maximum system transparency and non-intervention,at the cost of reduced functionality and services.The multiplexer module enables to integrate different interfaces andservices into the SDH payload to converge Datacom and Telecomapplications.
FibeAir 1500 Installation & Operation Manual Chapter 2. Theory of OperationRevision 2.0 In Door Unit (IDU) 2-32.2.2. MODEMThe FibeAir 1500 is equipped with a 16-states QAM Modem. The modemdelivers a 155 Mb/s payload in 50/56 MHz channel bandwidth in compliancewith FCC/ETSI standards. The Modem is equipped with Digital SignalProcessing functions as follows: n Digital IF - I/Q modulator/demodulator whose functions are: ⇒ Conversion of the modulated signal to/from the IF frequency. ⇒ Automatic level equalization on the signal from ODU. ⇒ Protection against overloads. n Timing recovery techniques employing digital tracking loop. n FEC ensures unfaded BER lower than 10-13.The following figure illustrates a measured 16 QAM constellation.Figure 2-2 16 QAM Constellation
Chapter 2. Theory of Operation FibeAir 1500 Installation & Operation Manual2-4 In Door Unit (IDU) Revision 2.02.2.3. Manager ModuleThe Manager module controls and manages all system’s modules, localand remote units.The Manager module also supports the user interface through Ethernet orPPP/SLIP to the management station, and an ASCII terminal port. A local ordumb terminal can be used for basic configuration and performancemonitoring.Other features include: n Log file. n Remote software and firmware download (upgrades can bedownloaded from local to remote). n Performance monitoring.2.2.4. Cable InterfacesA single coaxial cable connects the IDU to the ODU. This cable carries thefollowing signals: n Transmit and receive modulated signals. n Transmit and receive control data and communications between theIDU manager and the ODU controller. n DC power from the IDU to the ODU.The system automatically issues an alarm if the cable is disconnected andprovides protection against shorts. Furthermore, there is no need tomeasure and define the length and type of cable used since the systemautomatically compensates cable parameters.The following figure illustrates the signal direction through the coaxial cable.-48 VDCODU TO IDU (CONTROL)IDU TO ODU (CONTROL)TX (PAYLOAD 155M)RX (PAYLOAD 155M)Figure 2-3 Signal Direction Through the Coaxial Cable
FibeAir 1500 Installation & Operation Manual Chapter 2. Theory of OperationRevision 2.0 Out Door Unit (ODU) 2-52.2.5. Power SuppliesThe power supply features: n Standard Input : -48VDC n DC input range : -40.5VDC to –72VDC n DC/DC converter. n Reverse polarity protection. n Over-voltage and over-current protection. n Detection of IDU-ODU cable alarms (i.e. cable open, cable short).The ODU receives its DC power from the IDU. The PWR LED on the frontpanel of the IDU continuously lights to indicate the existence of inputvoltage.2.3. Out Door Unit (ODU)The ODU is designed to be fastened to the antenna using four latches. Theantenna is mounted on a standard mounting pole. The ODU is enclosed in acompact, weather proof enclosure and connects to the IDU via a singlecoaxial cable that can extend up to 300m (1000 ft).The ODU major modules: n T/R Module – A high sensitivity RF circuitry with full band frequencytuning range. n Controller – Controls the ODU and provides ODU status signals, andaccurate received signal level (RSL) reading (in dBm). n Cable Combiner – Detailed in paragraph 2.2.4. n Power Supply - Detailed in paragraph 2.2.5.Figure 2-4 ODU Mounted on the AntennaLatches
Chapter 2. Theory of Operation FibeAir 1500 Installation & Operation Manual2-6 System Specifications Revision 2.02.4. System Specifications2.4.1. General18 GHz 23 GHz 26 GHz 28 GHz 38 GHzStandards FCC/ETSI FCC/ETSI ETSI FCC/ETSI/Canada FCC/ETSIOperatingfrequency range 17.7 - 19.7GHz 21.2 - 23.6GHz 24.5 - 26.5GHz 27.5 - 28.35 GHz /27.5 - 29.5GHz/27.35 - 28.35 GHz37 - 38.4, 38.6-40 GHz/37-39.5 GHzTx/Rx spacing 1560/1010MHz 1200/1008MHz 1008 MHz 450/1008/500 MHz 700/1260 MHzRF channelspacing 50/55/80MHz 50/56 MHz 56 MHz 50/56 MHz 50/56 MhzCapacity OC-3/STM-1 or equivalentModulation type 16 QAMFrequencystability +/- 0.0005%Frequencysource SynthesizerRF channelselection Via NMSSystemconfigurations Non-Protected (1+0), Protected (1+1)2.4.2. FrequencyFrequency Supported Standards18 GHz EN 300 430, CEPT T/R12-03, ITU-R F.595-5, FCC parts 15, 101(formerly parts 21, 94)23 GHz EN 300 198, BAPT 211 ZV 02/23, MPT 1409, CEPT T/R13-02, ITU-R REC.F.637-2, FCC parts 15,101 (formerly parts 21,94)26 GHz EN 300 431, BAPT 211 ZV 11/26, MPT 1420, CEPT T/R13-02, ITU-R REC.748-228 GHz EN 300 431, CEPT T/R13-02, ITU-R REC.748, FCC parts 15, 101(formerly parts 21, 94)38 GHz EN 300 197, BAPT 211 ZV 12/38, MPT 1714, CEPT T/R12-01, ITU-R REC.749,FCC parts 15,101 (formerly parts 21,94), FCC: NZ4 GNT-FA-1500-38
FibeAir 1500 Installation & Operation Manual Chapter 2. Theory of OperationRevision 2.0 System Specifications 2-72.4.3. Radio18 GHz 23 GHz 26 GHz 28 GHz 38 GHzTransmittedPower 22 dBm 20 dBm 20 dBm 20 dBm 15 dBmTxAttenuationRange30 dB 30 dB 30 dB 30 dB 25 dBReceiverSensitivity(BER=10-6 )-73 dBm -72 dBm -72 dBm - 72 dBm -70 dBmReceiverOverload(BER=10-6 )Better than –15 dBmUnfadedBER Better than 10-132.4.4. Antenna18 GHz 23 GHz 26 GHz 28 GHz 38 GHz1 Ft Gain 33.5 dBi 35 dBi 36 dBi 36.6 dBi 39 dBi2 Ft Gain 38.5 dBi 40 dBi 41 dBi 41.5 dBi 44 dBi3 Ft Gain 42 dBi 43.5 dBi 44.5 dBi --------- ---------4/6 Ft Gain 44.5/48 dBi 46/49.5 dBi 47 dBi --------- ---------Polarization Vertical or HorizontalStandardMounting ODPole51mm – 114mm/2.0”-4.5” (Subject to vendor and antenna size)HighPerformance ETSI class 2, 3
Chapter 2. Theory of Operation FibeAir 1500 Installation & Operation Manual2-8 System Specifications Revision 2.02.4.5. Payload155.52 Mb/s Main ChannelPayload Types Sonet/SDH: OC-3/sts-3, OC-3c/STS-3c, SDH: OC-3/STM-1, ATM over Sonet/SDH,IP over Sonet/SDH, 3xDS3/ES3, 3xE3Physical Interfaces Electrical: CMI, UTP, STP, optical: single-mode, multi-mode, long-haul and short-haulCompatibleStandards ITU-T G.703, G.707, G.783, G.823, G.957, G.958, ITU-T I.432, ATM Forum, ETSIETS 300 147, ETS 300 417, ANSI T1.105, ANSI T1.102-1993, Bellcore GR-253-core,TR-NWT-0004991544/2048 Kb/s Wayside ChannelAvailableInterfaces T1/E1, Ethernet bridge 10Base-T, V.35, X21, RS-530 or V.3664 Kb/s User ChannelAvailableInterfaces 24 (RS-232, DB9, 64 Kb/s synchronous, 19.2 Kb/s asynchronous), or Ethernet bridge10Base-TService ChannelEngineering OrderWire ADM CVSD audio channel (64 Kb/s)Note: All interfaces for Main and Wayside Channels are available via modular, plug-in interface units.* 3xDS3/ES3 model is provided with a V.24 (RS232, DB9) user channel
FibeAir 1500 Installation & Operation Manual Chapter 2. Theory of OperationRevision 2.0 System Specifications 2-92.4.6. Network Management, Diagnostics, Status and AlarmsType SNMP, in compliance with RFC 1213, RFC 1595 (Sonet MIB)Local or RemoteNMS Station GiganetViewTM with advanced GUI for Windows 95/98/NTTM or UNIXTM ,integrated with HP OpenViewTMNMS Interface Ethernet bridge 10Base-T, RS-232 (PPP, SLIP)Local Configurationand Monitoring Standard ASCII terminal, serial RS-232Cascaded Topology Internal IP routing allows cascaded link topologyTMN Giganet NMS functions are in accordance with ITU-T recommendations for TMN.Interconnection to TMN is available via Q3 interface upon specific requirementExternal Alarms 8 Inputs, TTL-level or contact closure to ground, 5 Outputs, Form C contacts,software configurableRSL Indication Accurate power reading (dBm) available at IDU, ODU and NMSPerformanceMonitoring Integral with an on board memory per ITU-TG.8262.4.7. EnvironmentalOperating Temperature(Guaranteed Performance) ODU: -35oC to 55oCIDU: -5oC to 45oCRelative Humidity ODU: up to 100% (all weather operation)IDU: up to 95% (non-condensing)Altitude Up to 4,500m (15,000 ft)2.4.8. PowerStandard Input -48V DCDC Input range -40.5 to –72V DCOptional Input AC2.4.9. Mechanical DimensionsODU 25 cm diameter x 20/23 cm depth(10” diameter x 8” depth)8.45 kg weightIDU 4.3 cm height x 43.2 cm width x 24.0 cm depth(1.7” x 17” x 9.4”)2.7 kg weightIDU – ODU Coaxial Cable RG-223 (100 m/300 ft), Belden 9914/RG-8 (300 m/1000 ft)or equivalent, N-type connectors (male)

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