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Black Box MWU2000-X21, MWU2000-G703, MWU2000-V35 manual Synchronizing Co-located Modem Units

Models: MWU2000-G703 MWU2000-X21 MWU2000-V35

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2.048Mbps Wireless Modem

Figure 2-18. Default position (NC) of the Jumpers in the Receive Module.

Synchronizing Co-located Modem Units

When two or more 2.048Mbps Wireless Modem units are co-located, you should perform the following procedures in order to allow optimal performance. These procedures enable synchronization of the hopping sequences used by the links, and ensure sufficient separation between frequencies used by the links at any given time.

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Black Box MWU2000-X21 manual Synchronizing Co-located Modem Units, Default position NC of the Jumpers in the Receive Module

Contents

0118 965 Basingstoke Road, Reading, Berkshire RG2 0QN048Mbps Wireless Modem Sales 0118 965048Mbps Wireless Modem Contents Set-up and Configuration Properly General Introduction About this Manual2.048Mbps Wireless Modem Product DescriptionError-Free Data Transfer Seamless CommunicationVersatility High Speed CommunicationChoice of Antennas, Cables and RF Accessories 048Mbps Wireless Modem Benefits048Mbps Wireless Modem Components Co-locationLine Interface Unit RS530Fractional E1 with Echo Cancellation Fractional T1 With Echo CancellationModem Separate DSP Transmit and Receive Modems Adaptive EqualizationRadio AntennasGeneral Front Panel IndicatorsLine Rx Sync RXD and TXDTX Sync 048Mbps Wireless Modem Connectors 048Mbps Wireless Modem Connections E1 or Fractional E1 LIUInstalling the 2.048Mbps Wireless Modem General Installation Antennas and AccessoriesPackage Components To Configure the Unit as Master To Set the Clock Rate V.35/RS-530/X.21 onlyTo Configure Channels Fractional E1 To Configure Channels with Echo Cancellation- Fractional E1To Configure Channels with Echo Cancellation- Fractional T1 To Configure Channels- Fractional T1Antennas, Cables and Accessories Basic Antenna Uni-8.5Basic 8.5 dBi Antenna Showing Installation screws Medium Gain 12dBi Antenna Uni-12Medium Gain 12dBi Antenna Medium Gain 18dBi Antenna Uni-18Medium Gain 18dBi Antenna High Gain Antenna Uni-24High Gain 24dBi antenna Antenna Characteristics RF AccessoriesTPA 24 Transmit Power Amplifier Installing the TPA TPA 24 Connections DiagramLNA-10 Low Noise Receive Amplifier Achievable improvement through the use of LNA-10LNA Improvement table LNA-10 Cable Connection Diagram Installing the AL-1 Lightning ArrestorCable Types Thin CableThick Cable Low Loss CableAntenna Sets 11. Wall Mount with Azimuth Alignment Only12. Wall Mount with Azimuth and Elevation Alignment Range Tables European Range Table USA Range TableAntenna Alignment Visually Aligning the antennasActivating the front panel LEDs Maximum Unregulated Range Table14. Rssi measurement connection diagram To activate the front panel LEDs15. Rssi test point accuracy 048Mbps Wireless Modem 18. Default position NC of the Jumpers in the Receive Module Synchronizing Co-located Modem UnitsInstalling the Antennas Setting the relevant parametersMaximum Number Synchronized Links Connecting the Master units 21. Connecting Units for SynchronizationSet-up and Configuration Set-up and Configuration FunctionsAccessing the Set-up and Configuration Functions Main MenuParameters Menu Mode and Access Control MenuCounters and Tracers Menu System Reset TestingTo access the Parameters Menu To make selections using the Parameters menuE1 Parameters Menu LIU Parameters MenuE1 Parameters Menu Items and Actions E1 Alarm Buffer Fractional EI Parameters ManuRemote Alarm Method Fractional E1 parameters Menu Items and ActionsEcho Canceller disabling method Fractional E1 Alarm BufferLong haul/Short haul CRC4 UsageT1 Alarm Buffer T1 Parameters MenuT1 Parameters Menu Items and Actions Pulse ShapeFractional T1 Parameters Menu 048Mbps Wireless Modem 048Mbps Wireless Modem D4 Yellow Alarm Method Superframe MethodEcho Canceler CRC6 UsageBit 7 Zero Suppression Pulse Density EnforcerFractional T1 Alarm buffer V.35/RS-530/X.21 Parameters Menu Items and Actions 35/RS530/X.21 Parameter MenuDCE/DTE Functionality Options Loopback Mode Menu Loopback Mode Menu Items and Actions Clock PolarityLine Interface Unit Type Menu MCP Parameters MenuLine Interface Unit Type Menu Options MCP Parameters Menu Options Total Link DelayMaster-Slave Central Site Management Using a Dial-up Modem Modem Initialisation StringAT&f\n 11. Default Modem Rate According to Selected LIU Data Rat Radio and Modem Parameters Menu10. Radio and Modem Parameters Menu Options Modem RateHoping Sequence Remote ParametersAdd/Remove Channels from Test Sequence Switch to Local Monitor Switch to Remote Monitor12. Remote Parameters Menu Options Load Default Values Menu Ping Remote UnitDownload remote database to remote unit Copy database and download to remote unit13. Load Default Values Menu options Parameter Info. ScreenTo access the Counters and Tracers Menu To make selections from the Counters and Tracers Menu2.048Mbps Wireless Modems Counter display System Counters14. Buffers Name and Description Channel Tracer Rssi per channel 15. Modem Rate Vs. Buffer SizeChannel Tracer Errors Per Channel 16. Rssi LevelsTime Tracer Max Consecutive Errors versus Time Time Tracer Errors versus TimeClear System Counters and Channel Tracer 17. Delay Setting Set Time Tracer Resolution⇒ To set the time intervals Reset Counters Clear Reset CounterWatch Alarms MessageDescription CorrectionRemote Frame Alarm Radio Alarms Message Rlos framer un-synchronizedGeneral Alarms Message Warning LIU Clock drift, Check clock configurationMessage Warning Difference in parameters between two units Change Access Rights Site Survey ModeSystem Reset Menu MenuTroubleshooting IntroductionProblem 2 Poor performance of radio link ⇒ To check the configuration of each unit⇒ To check RF Installation ⇒ To check radio link performance⇒ To check each unit configuration To correct the configurationTo check synchronization at radio level From the Parameters menu, select Parameters Info. Screen 048Mbps Wireless Modem To reduce echo on voice channels To view isolated bursts of errorsTo improve data rate Problem 7 The system resets with an error message 048Mbps Wireless Modem Error Messages Source If the telephones does not work properly If Faxes does not work properly048Mbps Wireless Modem Technical Specifications Wireless Modem Technical Specifications ModelsRadio Type Transmission TechniqueDefault Modem Rate According to Selected LIU Data Rate Transmitter Output PowerChannel Bandwidth System BandwidthReceiver Sensitivity Maximum Spurious LevelReceiver Sensitivity as a Function of the Radio BER Recommended Receive Level Maximum Receive LevelAdjacent Channel Rejection Adjacent Channel Rejection Separate between TX and RX frequenciesMaximum Number of Synchronized Links Maximum Number of Links to SynchronizeFilter Curves Line Interface Specifications 101Fractional T1 Interface Fractional E1 InterfaceInterface RS-530 InterfaceConnectors Front Panel LED Indicators103 Environmental Specifications Mechanical SpecificationsStandards TPA 24 Technical Specifications LNA-10 Technical Specifications105 Antennas SetsAL-1 Technical Specifications 106107 DCE/DTE Configuration Configuration OptionsTable A-1. Possible DTE/DCE Configurations Appendix a V.35/RS-530/X.21 Applications048Mbps Wireless Modem Standard Configuration Table A-2. Configuration109 Synchronizing your Modem to Another NetworkConnecting your 2.048Mbps Wireless Modem to another modem RS-530/V.35/X.21 Back-to-Back Configuration111 DCE OptionsTo set the DCE/DTE mode Setting the DCE/DTE Mode ParameterDTE Options 113 E1/T1 Connections and Common Problems Link Setup Appendix B E1 / T1 Applications115 E1/T1 LIU Jumper SettingsTable B- 1. E1/T1 Connections To access the jumpers Figure B-2. E1/T1 Board LocationFigure B-3. E1 Unbalanced Coax connector, 75 W 117T1 CSU/DSU Applications Figure B-6. T1/DSU Network InterfaceE1/T1 Back-to-Back Configuration 119When to Use the Fractional E1/T1 LIU Appendix C Fractional E1/T1 ApplicationsTable C-1. Channels Characteristic 121Fractional E1 LIU Jumper Settings Table C-2. Fractional E1/T1 Connections123 Figure C-2. Fractional E1 Board LocationFigure C-3. Fractional E1 Unbalanced Coax connector, 75 W 125 Fractional T1 CSU/DSU ApplicationsFractional E1/T1 Back-to-Back Configuration Echo Cancellation in Fractional E1/T1 ApplicationsPotential Problems in Fractional E1/T1 Applications 127Appendix D Installing Other Types of Receive Amplifiers To separate DC input129 To supply DC input through the RF cableLIU RS-530 Connector Pin Assignments Appendix E Pin AssignmentsE1/T1 and Fractional E1/T1 Pin Connections Table E-1. E1/T1 and Fractional E1/T1 Pin Connections131 LIU D-25 to V.35 Cable Pin AssignmentsLIU D-25 to X.21 Cable Pin Assignments Figure E-3. LIU D-25 to X.21 Cable Pin Assignments