Synchronizing Co-located Modem Units | Black Box MWU2000-X21

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.

40	SALES: 0118 965 5100

Image 40

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 0QN 048Mbps Wireless Modem Sales 0118 965 048Mbps Wireless Modem Contents Set-up and Configuration Properly General Introduction About this Manual 2.048Mbps Wireless Modem Product Description Error-Free Data Transfer Seamless CommunicationVersatility High Speed Communication Choice of Antennas, Cables and RF Accessories 048Mbps Wireless Modem Benefits048Mbps Wireless Modem Components Co-location Line Interface Unit RS530 Fractional E1 with Echo Cancellation Fractional T1 With Echo CancellationModem Separate DSP Transmit and Receive Modems Adaptive Equalization Radio Antennas General Front Panel IndicatorsLine Rx Sync RXD and TXDTX Sync 048Mbps Wireless Modem Connectors 048Mbps Wireless Modem Connections E1 or Fractional E1 LIU Installing 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 only To Configure Channels Fractional E1 To Configure Channels with Echo Cancellation- Fractional E1 To Configure Channels with Echo Cancellation- Fractional T1 To Configure Channels- Fractional T1 Antennas, Cables and Accessories Basic Antenna Uni-8.5 Basic 8.5 dBi Antenna Showing Installation screws Medium Gain 12dBi Antenna Uni-12 Medium Gain 12dBi Antenna Medium Gain 18dBi Antenna Uni-18 Medium Gain 18dBi Antenna High Gain Antenna Uni-24 High Gain 24dBi antenna Antenna Characteristics RF AccessoriesTPA 24 Transmit Power Amplifier Installing the TPA TPA 24 Connections Diagram LNA-10 Low Noise Receive Amplifier Achievable improvement through the use of LNA-10 LNA Improvement table LNA-10 Cable Connection Diagram Installing the AL-1 Lightning Arrestor Cable Types Thin CableThick Cable Low Loss Cable Antenna Sets 11. Wall Mount with Azimuth Alignment Only 12. Wall Mount with Azimuth and Elevation Alignment Range Tables European Range Table USA Range Table Antenna Alignment Visually Aligning the antennasActivating the front panel LEDs Maximum Unregulated Range Table 14. Rssi measurement connection diagram To activate the front panel LEDs 15. Rssi test point accuracy 048Mbps Wireless Modem 18. Default position NC of the Jumpers in the Receive Module Synchronizing Co-located Modem Units Installing the Antennas Setting the relevant parameters Maximum Number Synchronized Links Connecting the Master units 21. Connecting Units for Synchronization Set-up and Configuration Set-up and Configuration FunctionsAccessing the Set-up and Configuration Functions Main Menu Parameters Menu Mode and Access Control MenuCounters and Tracers Menu System Reset TestingTo access the Parameters Menu To make selections using the Parameters menu E1 Parameters Menu LIU Parameters MenuE1 Parameters Menu Items and Actions E1 Alarm Buffer Fractional EI Parameters Manu Remote Alarm Method Fractional E1 parameters Menu Items and Actions Echo Canceller disabling method Fractional E1 Alarm BufferLong haul/Short haul CRC4 Usage T1 Alarm Buffer T1 Parameters MenuT1 Parameters Menu Items and Actions Pulse Shape Fractional T1 Parameters Menu 048Mbps Wireless Modem 048Mbps Wireless Modem D4 Yellow Alarm Method Superframe Method Echo Canceler CRC6 UsageBit 7 Zero Suppression Pulse Density Enforcer Fractional 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 Polarity Line 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 String AT&f\n 11. Default Modem Rate According to Selected LIU Data Rat Radio and Modem Parameters Menu10. Radio and Modem Parameters Menu Options Modem Rate Hoping 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 unit 13. Load Default Values Menu options Parameter Info. Screen To access the Counters and Tracers Menu To make selections from the Counters and Tracers Menu 2.048Mbps Wireless Modems Counter display System Counters 14. Buffers Name and Description Channel Tracer Rssi per channel 15. Modem Rate Vs. Buffer Size Channel Tracer Errors Per Channel 16. Rssi Levels Time 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 Counter Watch Alarms MessageDescription Correction Remote Frame Alarm Radio Alarms Message Rlos framer un-synchronized General Alarms Message Warning LIU Clock drift, Check clock configuration Message Warning Difference in parameters between two units Change Access Rights Site Survey Mode System Reset Menu Menu Troubleshooting Introduction Problem 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 properly 048Mbps Wireless Modem Technical Specifications Wireless Modem Technical Specifications ModelsRadio Type Transmission Technique Default Modem Rate According to Selected LIU Data Rate Transmitter Output PowerChannel Bandwidth System Bandwidth Receiver 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 frequencies Maximum Number of Synchronized Links Maximum Number of Links to SynchronizeFilter Curves Line Interface Specifications 101 Fractional T1 Interface Fractional E1 InterfaceInterface RS-530 Interface Connectors Front Panel LED Indicators103 Environmental Specifications Mechanical SpecificationsStandards TPA 24 Technical Specifications LNA-10 Technical Specifications105 Antennas Sets AL-1 Technical Specifications 106 107 DCE/DTE Configuration Configuration OptionsTable A-1. Possible DTE/DCE Configurations Appendix a V.35/RS-530/X.21 Applications 048Mbps Wireless Modem Standard Configuration Table A-2. Configuration109 Synchronizing your Modem to Another Network Connecting your 2.048Mbps Wireless Modem to another modem RS-530/V.35/X.21 Back-to-Back Configuration 111 DCE Options To 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 Applications 115 E1/T1 LIU Jumper SettingsTable B- 1. E1/T1 Connections To access the jumpers Figure B-2. E1/T1 Board Location Figure B-3. E1 Unbalanced Coax connector, 75 W 117 T1 CSU/DSU Applications Figure B-6. T1/DSU Network Interface E1/T1 Back-to-Back Configuration 119 When to Use the Fractional E1/T1 LIU Appendix C Fractional E1/T1 Applications Table C-1. Channels Characteristic 121 Fractional E1 LIU Jumper Settings Table C-2. Fractional E1/T1 Connections 123 Figure C-2. Fractional E1 Board Location Figure C-3. Fractional E1 Unbalanced Coax connector, 75 W 125 Fractional T1 CSU/DSU Applications Fractional E1/T1 Back-to-Back Configuration Echo Cancellation in Fractional E1/T1 Applications Potential Problems in Fractional E1/T1 Applications 127 Appendix D Installing Other Types of Receive Amplifiers To separate DC input 129 To supply DC input through the RF cable LIU 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 Connections 131 LIU D-25 to V.35 Cable Pin Assignments LIU D-25 to X.21 Cable Pin Assignments Figure E-3. LIU D-25 to X.21 Cable Pin Assignments