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Black Box MWU2000-V35, MWU2000-G703, MWU2000-X21 Maximum Receive Level, Recommended Receive Level

Models: MWU2000-G703 MWU2000-X21 MWU2000-V35

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2.048Mbps Wireless Modem

Figure 5-1. Radio BER Improvement

Table 5-5. System Gain

Maximum Receive Level

-10dBm for modem rates: 0.5Mbps, 1Mbps, 2Mbps.

-25dBm for modem rate of 3Mbps.

Recommended Receive Level

10dB above sensitivity threshold for an adequate fade margin.

Adjacent Channel Rejection

Adjacent channel rejection indicates the difference (in dB) between the power level of an interfering RF signal and the power level of a desired signal, where the interfering signal

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Black Box MWU2000-V35, MWU2000-G703 manual Maximum Receive Level, Recommended Receive Level, Adjacent Channel Rejection

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 DescriptionVersatility Error-Free Data TransferSeamless Communication High Speed Communication048Mbps Wireless Modem Components Choice of Antennas, Cables and RF Accessories048Mbps Wireless Modem Benefits Co-locationLine Interface Unit RS530Modem Separate DSP Transmit and Receive Modems Fractional E1 with Echo CancellationFractional T1 With Echo Cancellation Adaptive EqualizationRadio AntennasLine Front Panel IndicatorsGeneral TX Sync RXD and TXDRx Sync 048Mbps Wireless Modem Connectors 048Mbps Wireless Modem Connections E1 or Fractional E1 LIUPackage Components Installation Antennas and AccessoriesInstalling the 2.048Mbps Wireless Modem General 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 TPA 24 Transmit Power Amplifier RF AccessoriesAntenna Characteristics 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 ArrestorThick Cable Cable TypesThin 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 TableActivating the front panel LEDs Antenna AlignmentVisually Aligning the antennas 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 SynchronizationAccessing the Set-up and Configuration Functions Set-up and ConfigurationSet-up and Configuration Functions Main MenuCounters and Tracers Menu Mode and Access Control MenuParameters Menu To access the Parameters Menu System ResetTesting To make selections using the Parameters menuE1 Parameters Menu Items and Actions LIU Parameters MenuE1 Parameters Menu E1 Alarm Buffer Fractional EI Parameters ManuRemote Alarm Method Fractional E1 parameters Menu Items and ActionsLong haul/Short haul Echo Canceller disabling methodFractional E1 Alarm Buffer CRC4 UsageT1 Parameters Menu Items and Actions T1 Alarm BufferT1 Parameters Menu Pulse ShapeFractional T1 Parameters Menu 048Mbps Wireless Modem 048Mbps Wireless Modem D4 Yellow Alarm Method Superframe MethodBit 7 Zero Suppression Echo CancelerCRC6 Usage Pulse Density EnforcerFractional T1 Alarm buffer DCE/DTE Functionality Options 35/RS530/X.21 Parameter MenuV.35/RS-530/X.21 Parameters Menu Items and Actions Loopback Mode Menu Loopback Mode Menu Items and Actions Clock PolarityLine Interface Unit Type Menu Options MCP Parameters MenuLine Interface Unit Type Menu Master-Slave Total Link DelayMCP Parameters Menu Options Central Site Management Using a Dial-up Modem Modem Initialisation StringAT&f\n 10. Radio and Modem Parameters Menu Options 11. Default Modem Rate According to Selected LIU Data RatRadio and Modem Parameters Menu Modem RateAdd/Remove Channels from Test Sequence Remote ParametersHoping Sequence 12. Remote Parameters Menu Options Switch to Remote MonitorSwitch to Local Monitor Download remote database to remote unit Load Default Values MenuPing 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 LevelsClear System Counters and Channel Tracer Time Tracer Errors versus TimeTime Tracer Max Consecutive Errors versus Time ⇒ To set the time intervals Set Time Tracer Resolution17. Delay Setting Reset Counters Clear Reset CounterDescription Watch AlarmsMessage 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 Introduction⇒ To check RF Installation Problem 2 Poor performance of radio link⇒ To check the configuration of each unit ⇒ To check radio link performanceTo check synchronization at radio level To correct the configuration⇒ To check each unit configuration From the Parameters menu, select Parameters Info. Screen 048Mbps Wireless Modem To improve data rate To view isolated bursts of errorsTo reduce echo on voice channels 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 Radio Type Technical SpecificationsWireless Modem Technical Specifications Models Transmission TechniqueChannel Bandwidth Default Modem Rate According to Selected LIU Data RateTransmitter Output Power System BandwidthReceiver Sensitivity as a Function of the Radio BER Maximum Spurious LevelReceiver Sensitivity Adjacent Channel Rejection Maximum Receive LevelRecommended Receive Level Adjacent Channel Rejection Separate between TX and RX frequenciesFilter Curves Maximum Number of Links to SynchronizeMaximum Number of Synchronized Links Line Interface Specifications 101Interface Fractional T1 InterfaceFractional E1 Interface RS-530 Interface103 Front Panel LED IndicatorsConnectors Standards Mechanical SpecificationsEnvironmental Specifications 105 TPA 24 Technical SpecificationsLNA-10 Technical Specifications Antennas SetsAL-1 Technical Specifications 106107 Table A-1. Possible DTE/DCE Configurations DCE/DTE ConfigurationConfiguration Options Appendix a V.35/RS-530/X.21 Applications109 048Mbps Wireless Modem Standard ConfigurationTable A-2. Configuration 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 OptionsDTE Options Setting the DCE/DTE Mode ParameterTo set the DCE/DTE mode 113 E1/T1 Connections and Common Problems Link Setup Appendix B E1 / T1 ApplicationsTable B- 1. E1/T1 Connections E1/T1 LIU Jumper Settings115 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 cableE1/T1 and Fractional E1/T1 Pin Connections LIU RS-530 Connector Pin AssignmentsAppendix E Pin Assignments 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