Black Box MWU2000-X21 - Manuals

10 2.048Mbps Wireless Modem SALES: 0118 965 5100 Main Features of the 2.048Mbps Wireless Modem Wireless Connectivity The 2.048Mbps Wireless Modem provides a wireless data link. The DSP modem with adaptive equalization provides robust and reliable communication, overcoming problems caused by fading o...

12 2.048Mbps Wireless Modem SALES: 0118 965 5100 Line Interface Unit The Line Interface Unit connects the 2.048Mbps Wireless Modem to the WAN or to the DTE (Data terminal Equipment). Any data, voice or video system can be connected to the 2.048Mbps Wireless Modem using standard interfaces: • T1 DSX-...

14 2.048Mbps Wireless Modem SALES: 0118 965 5100 ARQ – Based Error Correction The 2.048Mbps Wireless Modem uses an Automatic Retransmission Queuing (ARQ) mechanism to detect errors in received data and to request retransmission. The use of ARQ results in a significant improvement in performance, ove...

15 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 For further information on antennas, cables and related accessories see Chapter 2, Installation, antennas and Accessories. Antenna Interface Antenna interface to the 2.048Mbps Wireless Modem is via two SMA connectors on the rear panel; Transmit an...

16 2.048Mbps Wireless Modem SALES: 0118 965 5100 AIS (Alarm Indication Signal - E1/T1 and Fractional E1/T1 only). Red LED lights when WAN or DTE control frame is received by the modem indicating that information that should be sent by the modem is not received by the DTE (or the WAN). The main reaso...

17 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 2.048Mbps Wireless Modem Connectors Figure 1-8 shows how to connect the 2.048Mbps Wireless Modem to its antennas, the power supply and to external equipment. Figure 1-8. 2.048Mbps Wireless Modem Connections (E1 or Fractional E1 LIU)

18 2.048Mbps Wireless Modem SALES: 0118 965 5100 Installation Antennas and Accessories Package Components The 2.048Mbps Wireless Modem is shipped from factory with the following components: • The 2.048Mbps Wireless Modem • Power cord (110/220 VAC models), AC connector not supplied • Monitor cable • ...

19 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 2-1. 2.048Mbps Wireless Modem Rear Panel Showing 48 VDC Connector 6. For two 2.048Mbps Wireless Modems to communicate with one another, one side of the link must be configured in Master mode, with the unit at the other side of the link conf...

20 2.048Mbps Wireless Modem SALES: 0118 965 5100 4. From the V.35/RS-530/X.21 Parameters menu, type 1. The Clock Rate sub-menu opens. 5. Select the required clock rate according the required data rate of n x 64kb/S. For example: • Type 1 for 64 Kbps • Type 8 for 512 Kbps (8 x 64) • Type 32 for 2048 ...

22 2.048Mbps Wireless Modem SALES: 0118 965 5100 4. From the Add/Remove Echo Cancellation on voice channels menu, type 2 to select the Clear (Remove) Channels menu. 5. View the current list of channel with echo cancellation. If channels in which echo cancellation should not be used are included, ent...

28 2.048Mbps Wireless Modem SALES: 0118 965 5100 Installing the TPA 24 1. Install the TPA 24 as close as possible to the transmitting antenna. Figure 2-6. TPA 24 Connections Diagram 2. Set the transmitter DC power supply of the 2.048Mbps Wireless Modem to 12V using the internal jumpers according to ...

29 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Note: Installations exceeding regulations set by local authorities expose the installer and the user to potential legal and financial liabilities. LNA-10 Low Noise Receive Amplifier The LNA-10 is a high-performance, low-noise preamplifier designed...

31 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 2-9. LNA-10 Cable Connection Diagram The power supply (PS) and Power Inserter are supplied with the LNA-10. The RG-59 coaxial cable (with F-type connector) is not supplied and must be purchased separately. Note: See Appendix C for installin...

32 2.048Mbps Wireless Modem SALES: 0118 965 5100 Figure 2-10. AL-1 Cable Connection Diagram Cable Types Thin Cable This is a relatively thin and flexible cable. However, its attenuation is relatively high. Impedance is 5 0 W. Outer diameter is 5mm (0.195"). Thick Cable This cable is thicker, hea...

33 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Professional Installers Only Antennas, whether installed indoors or out, are to be installed ONLY by experienced antenna installers that are familiar with local buildings and safety codes, and wherever necessary are licensed by appropriate governm...

34 2.048Mbps Wireless Modem SALES: 0118 965 5100 Figure 2-12. Wall Mount with Azimuth and Elevation Alignment Figure 2-13 One 12dBi Antenna

35 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Range Tables Use the following tables to calculate the antennas and cables that will best suit your transmit/receive range requirements (assuming line-of-sight between 2.048Mbps Wireless Modem Master and Slave units). The tables are based on the a...

36 2.048Mbps Wireless Modem SALES: 0118 965 5100 Table 2-6. Maximum (Unregulated) Range Table Antenna Alignment In order to function properly and to provide quality results, the modems on either side of the link must have a stable RF link. The alignment procedure is performed in three steps. First, ...

37 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 To activate the front panel LEDs: 1. If the LEDs are not lit, loosen the screws on the U-bolt that fasten the Rx and Tx antennas to the last (or the bolts on the wall mount) and slowly move the antennas up and down (elevation) and from side-to-sid...

40 2.048Mbps Wireless Modem SALES: 0118 965 5100 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 perform...

41 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 2-19. Several Co-located modems in a “star” configuration Note: On the Master side, the 2.048Mbps Wireless Modem units with a SW version 1.6 and up and HW version 2 must be used. On the Slave side, 2.048Mbps Wireless Modem units with a SW v...

43 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 2-20. Several Co-located 2.048Mbps Wireless Modems in a “center-to-center” configuration. Step-3 Connecting the Master units Establishing synchronization is a “Hot Plug-In” process: You can add a new link without interfering with the normal...

44 2.048Mbps Wireless Modem SALES: 0118 965 5100 Set-up and Configuration Set-up and Configuration Functions This section explains how to access and set the Set-up and Configuration functions that are provided for the 2.048Mbps Wireless Modem. The main parameters to set are: • Line interface unit se...

46 2.048Mbps Wireless Modem SALES: 0118 965 5100 System Reset Resetting the system from the System Reset menu implements all the changes made to the parameters of all the Setup and Configuration functions. Testing This menu is for authorized Black Box technical staff only. Parameters Menu You can ac...

47 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 2. Press Esc at any stage to return to the previous menu (if you press Esc before making any selection, the message: Loading cancelled, old value retained appears). Note: You can operate all the Setup and Configuration sub-menus by using these pro...

48 2.048Mbps Wireless Modem SALES: 0118 965 5100 E1 Alarm Buffer The Possible alarms are: • LOS (all zeros signal): Loss Of Signal – No signal is received from the data equipment. • AIS: Alarm Indication Signal – No signal is received by the connected end equipment. When an alarm is detected, a note...

49 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Table 3-2. Fractional E1 parameters Menu Items and Actions Remote Alarm Method Two methods may be used to indicate to the end equipment of an alarm condition following loss of synchronization: • Bit 3 of TS (Time Slot) 0: Under normal conditions, ...

50 2.048Mbps Wireless Modem SALES: 0118 965 5100 Long haul/Short haul This parameter determines the sensitivity of the receiver circuits in the line interface to the end equipment. If the distance between modem and the end equipment is up to 500 meters, it should be set to 0 (short haul). If the dis...

51 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Remote-BreezeLINK-Unsync Indicates a temporary incidence of a very noisy radio channel. Repeated occurrences indicate either a very noisy radio channel or a hardware problem (e.g. clocks with excessive jitter) or a problem related to configuration...

52 2.048Mbps Wireless Modem SALES: 0118 965 5100 When an alarm is detected, a note appears at the bottom of the display (Note: An alarm has been activate d) and the message: ALARM EXISTS is displayed on the menu header (see Figure 3-1). In addition, the TEST LED will blink. Fractional T1 Parameters ...

55 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Superframe Method Each frame transmitted to (or received from) the end equipment is comprised of 193 bits, numbered 1 to 193. Bit numbers 2 to 193 are used for data. The first bit of each frame is designated an F-bit, and is used for purposes such...

56 2.048Mbps Wireless Modem SALES: 0118 965 5100 interface, as per the requirement specified in the applicable standard (DSX-1 for DSU network interface, ANSI T1.403 for CSU network interface). See Appendix C for more details about CSU and DSU network interfaces. CRC6 Usage The F-bits in an ESF mult...

57 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 • Straight 2100Hz tone (0): The most popular method based on transmitting a straight 2100Hz tone. • Phase reversed 2100Hz tone (1): A 2100Hz tone with phase reversals for improved differentiation from voice signals. • 2100Hz VPA tone (2): A tone i...

60 2.048Mbps Wireless Modem SALES: 0118 965 5100 For fractional E1/T1, the LIU card performs the loopback. Both clock and data are looped back. When the Master modem is set for loopback operation, the clock starts drifting from the clock of the end equipment (under normal conditions, the system cloc...

61 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Table 3-9. MCP Parameters Menu Options Master-Slave In synchronous data communications systems, all components of the link should operate using the same clock. The Master unit provides the clock and the Slave unit reconstructs it from the data rec...

62 2.048Mbps Wireless Modem SALES: 0118 965 5100 In order to maintain a continuous flow of reconstructed received data transferred to the terminal equipment, a delay must be introduced. The longer the delay, the more effective the ARQ mechanism. A longer delay can improve performance in applications...

63 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 The following commands are set as a default initialisation string in the modem: AT&f\n The meaning of this string is initialising default configuration (“n” means “new line”). An example for a more informative initialisation string is: AT&...

64 2.048Mbps Wireless Modem SALES: 0118 965 5100 Radio and Modem Parameters Menu The Radio and Modem Parameters menu gives you access to the following parameters: • Modem Rate • Hopping Sequence • Transmit Power • Test Sequence Add/Remove Channels menu Table 3-10. Radio and Modem Parameters Menu Opt...

65 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Changing the modem rate above the default value results in the following: • The higher the modem rate, the lower the sensitivity. Achievable distances decrease as the modem rate increases. • The higher the modem rate relative to the LIU data rate,...

66 2.048Mbps Wireless Modem SALES: 0118 965 5100 • Copy local database and download to remote unit. Table 3-12. REMOTE Parameters Menu Options Switch to Remote Monitor When selecting option 1 (Switch to remote monitor) in the REMOTE Parameters Menu, the database of the remote unit starts loading int...

67 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Ping Remote Unit The remote management process involves transfer of large quantities of data between the units, in addition to normal data and signals. Since this transfer can take a long time, the PING mode is used to verify that there is a worki...

69 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Counters and Tracers Menu To access the Counters and Tracers Menu: • From the Main Menu, type 2. The Counters and Tracers Menu appears. Figure 3-6. Counters and Traces Menu To make selections from the Counters and Tracers Menu: • At the Select Opt...

70 2.048Mbps Wireless Modem SALES: 0118 965 5100 System Counters In the Counters and Tracers menu, type 1 to display the System Counters. Figure 3-7.2.048Mbps Wireless Modems Counter display. The System Counters give you statistical information on the quality of communications with the terminal equi...

75 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 3-12. Time Tracer Max Consecutive Errors Graph Using the same time resolution as the Time Tracer Errors versus Time, this graph displays the maximum number of consecutive errors in each time unit. At the top of the graph appears information...

77 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Watch Alarms Alarms for V1.7 LIU Alarms In the Counters and Tracers menu, type A to display the alarms of the monitored unit Message: Input CLK to LIU is 0 Description: Appears in a unit with V.35/RS-530/X.21 hardware that is configured in softwar...

78 2.048Mbps Wireless Modem SALES: 0118 965 5100 Message: Remote Frame Alarm Description: In fractional E1 applications, an indication from the connected end equipment that it was unsuccessful in synchronizing with the 2.048Mbps Wireless Modem. Correction: Check the cable, which connects the end equ...

79 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Message: RLOS (framer un-synchronized) Description : In Fractional T1 applications, the wireless modem was unsuccessful in synchronizing with the end equipment. Correction: Check the cable that connects the end equipment to the modem. Check that p...

82 2.048Mbps Wireless Modem SALES: 0118 965 5100 Mode and Access Control Menu The Mode and Access Control menu enables to define the access rights. It also enables access to the Site Survey Mode for surveying the applicable electromagnetic environment of the site (this does not require a password). ...

83 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure 3-14. Site Survey Graph The minimum measurable RSSI of the system is approximately -103 dBm. An RSSI level higher than -103 indicates interference. The difference between the level of interference to -103 dBm affects the sensitivity in that...

84 2.048Mbps Wireless Modem SALES: 0118 965 5100 Troubleshooting Introduction In the process of establishing a link, various problems may arise, either single link problems or co-located link problems. The possible problems are: • Two units are connected but there is no radio link between them • Poo...

85 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 ⇒ To check the configuration of each unit: 1. From the Parameters menu, select Parameters Info. Scree n. 2. Verify that one unit is configured as Master and the other as Slave. 3. Verify that the following parameters are set identically on both un...

86 2.048Mbps Wireless Modem SALES: 0118 965 5100 The received power should be above the reception threshold for the modem rate in use. It is preferable to keep the received power level at least 10 dB above the threshold for an adequate fade margin. If the received power level is not sufficient, chec...

87 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 3. For X.21, RS-530 and V.35 configured as DCE External Clock or DTE, verify that: • The end equipment is defined as DTE or DCE accordingly. • The end equipment is connected to the unit. • In the Counters and Tracers menu select Watch Alarm s. Ver...

89 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 • For E1 and Fractional E1, verify that the balanced/unbalanced configuration of the LIU (set by the jumpers on the LIU board) matches that of the end equipment. Problem 6: The radio link is fine, but the voice quality/data rate is poor, or the en...

90 2.048Mbps Wireless Modem SALES: 0118 965 5100 Problem 7: The system resets with an error message Use the following table to determine the source of the error messages:

92 2.048Mbps Wireless Modem SALES: 0118 965 5100 Table 4-1. Error Messages Source Problem 8: One or more links function properly (are synchronised), but when adding another link, performance degrades. Probable cause: • Incorrect configuration of all units connected by the synchronization cable. • Ph...

95 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Technical Specifications Wireless Modem Technical Specifications Models 2.048Mbps Wireless Modem For data rates of up to 2.048 Mbps, with E1, T1, RS-530, V.35 or X.21 interface 512Kbps Wireless Modem For data rates of up to 512kbps, with RS-530, V...

96 2.048Mbps Wireless Modem SALES: 0118 965 5100 The modem rate is selected automatically by the selected LIU Data Rate (Clock Rate), according to the following table: Table 5-2. Default Modem Rate According to Selected LIU Data Rate Channel Bandwidth The bandwidth for each channel is –20dBc at ±500...

97 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Maximum Spurious Level 60dBc Receiver Sensitivity The receiver sensitivity, as a function of the radio BER, is determined according to Table 5-4. Note that the radio error rate does not include the error correction algorithm, which can improve sen...

98 2.048Mbps Wireless Modem SALES: 0118 965 5100 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. Adjac...

99 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 causes a degradation of 3db in the sensitivity of the receiver. The graph below displays the adjacent channel rejection of the modem receiver as a function of the frequency separation (Delta F in MHz) between the frequency of the interfering signa...

100 2.048Mbps Wireless Modem SALES: 0118 965 5100 Maximum Number of Links to Synchronize Table 5-6. Maximum Number of Synchronized Links Filter Curves Filter curves for the transmitter and receiver are shown in the graph below. Note that the receiver contains two cascaded filters of this type. Figur...

101 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Frequency Accuracy ± 15ppm. Noise Figure 5dB max. Total Link Display Controllable, between 14ms to 156ms, depending on the Data and Radio rates. Line Interface Specifications Data Rates (Full Duplex) Nx64Kbps: 64, 128, … 2048kbps N x 64Kbps: 64, ...

102 2.048Mbps Wireless Modem SALES: 0118 965 5100 Fractional T1 Interface Data Rate: 1544 Kbps Type: DSX-1, meets CCITT G.703, G.704 and G.823 Connector: RJ-45 Line Mode: Bipolar AMI or B8ZS Impedance: 10 0Ω Fractional E1 Interface Data Rate: 2048 Kbps Type: CEPT-I, meets CCITT G.703, G.704 and G.82...

103 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 X.21 Interface Data Rate: 64 - 2048 Kbps (N x 64) Type: Synchronous Data, RS-422 levels Connector: D-type, 15 pins, female (An adapter cable connected to the 25 pins D-Type connector on the RS-530/X.21 LIU) Echo Canceller (Fractional E1/T1) Meets...

104 2.048Mbps Wireless Modem SALES: 0118 965 5100 Q-CTRL (future RJ-45, 8 pin, female option) RSSI Test point (for DVM), accuracy = ±20%. Power 100 - 240 VAC or 18 - 72 VDC, 25 W max. Management Monitoring, diagnostics and configuration. Interface - V.24/RS-232, 9 pins D Type female connector. Acces...

105 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Antennas Sets One transmit antenna, one receive antenna. Standard Antennas: • low - 8.5dBi, 8.5dBi. • Basic – 12 dBi, 12dBi • Medium Gain - 12dBi, 18dBi. • High Gain – 12, 24dBi. TPA 24 Technical Specifications Models used with 2.048Mbps Wireless...

106 2.048Mbps Wireless Modem SALES: 0118 965 5100 Connectors LNA 10 • RF IN: N-type, female • RF OUT: N-type, male • Signal and Power IN: not in use • Signal and Power OUT: F-type, female Power Inserter • To CONV: F-type, female • To TV: F-type, female (not in use) Power Supply Required Voltage: +12...

107 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Operating Environment: Indoor/Outdoor Grounding: One of the female-type N connectors is mounted directly through a hole in the shelter wall and held in place with a lockwasher and nut.

108 2.048Mbps Wireless Modem SALES: 0118 965 5100 Appendix A - V.35/RS-530/X.21 Applications DCE/DTE Configuration The following is a description of the possible configurations when connecting V.35/RS-530/X.21 end equipment to the 2.048Mbps Wireless Modem. The configurations described are applicable...

111 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 DCE Options 1. DCE, internal clock - Supported by V.35, RS-530 and X.21. Jumper configuration: Figure A-5. DCE, Internal Clock Jumpers 2. DCE, external clock - Supported by V.35 and RS-530. Jumper configuration: Figure A-6. DCE, External Clock Ju...

112 2.048Mbps Wireless Modem SALES: 0118 965 5100 DTE Options 1. DTE - Supported by V.35, RS-530. Jumper configuration: Figure A-7. DTE, V.35 and RS-530 2. DTE - Supported by X.21. Jumper configuration: Figure A-8. DTE, X.21 Setting the DCE/DTE Mode Parameter To set the DCE/DTE mode: 1. From the Set...

116 2.048Mbps Wireless Modem SALES: 0118 965 5100 Figure B-2. E1/T1 Board Location To access the jumpers: 1. Disconnect all cables, including the power cable, from the unit. 2. Loosen and remove the two screws on the rear panel. Carefully slide out the boards. The jumpers are located at the bottom s...

120 2.048Mbps Wireless Modem SALES: 0118 965 5100 Appendix C – Fractional E1/T1 Applications Introduction This appendix explains under which conditions it is recommended to use the Fractional E1/T1 LIU. It also describes some of the possible ways to connect a Fractional E1/T1 2.048Mbps Wireless Mode...

122 2.048Mbps Wireless Modem SALES: 0118 965 5100 Table C-2 summarizes the possible connections and the resulting behaviour: Table C-2. Fractional E1/T1 Connections In addition to the faults mentioned in the above table, there is a possibility of a cable being disconnected or shortened. Both these s...

123 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure C-2. Fractional E1 Board Location To access the jumpers: 1. Disconnect all cables, including the power cable, from the unit. 2. Loosen and remove the two screws on the rear panel. Carefully slide out the boards. The jumpers are located at ...

126 2.048Mbps Wireless Modem SALES: 0118 965 5100 Fractional E1/T1 Back-to-Back Configuration Figure C-7. Fractional E1/T1 Back-to-Back Configuration Echo Cancellation in Fractional E1/T1 Applications Regular telephony systems use 4 wires circuits: one pair for the transmitted signal (microphone) an...

128 2.048Mbps Wireless Modem SALES: 0118 965 5100 Appendix D - Installing Other Types of Receive Amplifiers General The 2.048Mbps Wireless Modem supports other types of Receive Amplifiers which are not supplied by Black Box. Following are some tips regarding installation of different types of Receiv...

129 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233 Figure D-2. Jumper Setting for 12 VDC Power Supply To supply DC input through the RF cable 1. Connect the RF + Power Cable directly to the RF input in the Receive Amplifier. 2. Set the jumper Jp1 in the Rx Radio module to 12 VDC. Figure D-3. Rece...

130 2.048Mbps Wireless Modem SALES: 0118 965 5100 Appendix E – Pin Assignments E1/T1 and Fractional E1/T1 Pin Connections Table E-1. E1/T1 and Fractional E1/T1 Pin Connections LIU RS-530 Connector Pin Assignments Figure E-1. LIU RS-530 Pin Assignments.