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DTS L54 Series User Manual

Digital stl radios
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L54 Series Digital STL Radios
User Manual
Ver 1.0.1

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Summary of Contents for DTS L54 Series

  • Page 1 L54 Series Digital STL Radios User Manual Ver 1.0.1...

  • Page 2: Safety Precautions

    DTS Broadcast PDH Microwave Digital Radio User Manual 1 Safety Precautions PLEASE READ THESE SAFETY PRECAUTIONS! RF Energy Health Hazard This symbol indicates a risk of personal injury due to radio frequency exposure. The radio equipment described in this guide uses radio frequency transmitters.

  • Page 3: Safety Requirements

    DTS Broadcast PDH Microwave Digital Radio User Manual Warning – This is a Class A product Warning – This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

  • Page 4: System Descriptions

    PDH Microwave Digital Radio User Manual 2 System Descriptions 2.1Overview L54 series of PDH digital microwave radios, and integrated design incorporating high & new technology such as FPGA, ASIC and digital signal processor (DSP). The L54 is designed for short-haul, high-reliability, easy-toinstall, and low-cost point-to-point communication links.
  • Page 5 DTS Broadcast PDH Microwave Digital Radio User Manual 2.2 Features • High perfermance and integrated design incorporating high & new technology • Minimal installation time • Single coaxial cable connection between Indoor and Outdoor Units • Adjustable transmit output power •...
  • Page 6 DTS Broadcast PDH Microwave Digital Radio User Manual 2.3 Software Controlled Features The L54 is based on full software control and system configuration. Use of the software-based features is through the front LCD panel keypad and display on each IDU, or through Internet Explorer running in PC.
  • Page 7 DTS Broadcast PDH Microwave Digital Radio User Manual Internet Explorer based on PC is also available to control, configure and monitor a L54 terminal using the 10BASE-T interface WEB based on the IDU. The WEB Server based Internet Explorer main screen is shown in Figure 2-2.

  • Page 8: Basic Structure

    DTS Broadcast PDH Microwave Digital Radio User Manual 2.4 Basic Structure A universal radio basic structure concept has been implemented for the L54 product line. A radio terminal consists of three components: IDU, ODU and Antenna. A single coaxial cable is required to interconnect the IDU with the ODU.
  • Page 9 DTS Broadcast PDH Microwave Digital Radio User Manual 2.4.1 IDU The L54 IDU is a 1RU rack-mountable assembly designed for 19-inch rack/cabinet installations. All IDUs are compatible with standard 19-inch EIA and ETSI rack mount standards. Each IDU is designed to support one of four capacities: 4E1/8E1/16E1, and 10/100BASE-T+1/2/4E1data rates.
  • Page 10 DTS Broadcast PDH Microwave Digital Radio User Manual See Figure 2-9 for IDU panel with no plug-in card. See Figure 2-10 for 4/8/16E1 75ohm unbalanced plug-in. See 2-11 for 4/8/16E1 120ohm balanced plug-in. See Figure 2-12 for 10/100BASE-T+1/2/4E1 120ohm balanced plug-in.
  • Page 11 DTS Broadcast PDH Microwave Digital Radio User Manual See Figure 2-13 for IDU 1+1 mode panel with no plug-in card. See Figure 2-14 for 4E1 120ohm balanced plug-in. See 2-15 for 4 ports 10/100BASE-T plug-in. Figure 2-13 IDU 1+1 without service card...
  • Page 12 DTS Broadcast PDH Microwave Digital Radio User Manual The QPSK IF signal with 70MHz carrier received by ODU will be demodulated required frame data. And the frame data will be demultiplexed by frame-diplexer to EOW signal, Auxiliary Data, CPU site-to-site communication messages and service data. The EOW signal is sent to phone interface, the Auxiliary Data is sent to Auxiliary Data interface, the CPU messages is sent to CPU for management, and the service data send to service plug-in card.
  • Page 13 DTS Broadcast PDH Microwave Digital Radio User Manual Figure 2-17 Block diagram of the QPSK modulator The demodulator of QPSK modem in IDU has functions list below: See Figure 2-18. 70MHz IF AGC Carrier Recovery and Derotator Loop Timing Recovery...
  • Page 14 DTS Broadcast PDH Microwave Digital Radio User Manual 16 trabutary datas are fed to the 4/8/16E1 service card in IDU. The DSP in service card converts the tributary datas to TTL level signals and multiplexes them onto four E2 data streams. The 4 E2 data streams are fed to mother board of IDU througth a connector.
  • Page 15 DTS Broadcast PDH Microwave Digital Radio User Manual Figure 2-20 Block diagram of the 10/100BASE-T+1/2/4E1 service card The Tx IF signal is superimposed with DC power and sent to the ODU on a coaxial cable. The Rx IF signal is fed through the coaxial cable to the IDU. And the communicating between IDU with ODU is an OOK signal fed into the coaxial cable.
  • Page 16 DTS Broadcast PDH Microwave Digital Radio User Manual 2.4.2 ODU Figure 2-22 ODU and Connector • Antenna Alignment Indicator: If there is no electric meter during set up, this indicator helps to define the antenna alignment. Higher the signal strengh indicates better antenna alignment.
  • Page 17 DTS Broadcast PDH Microwave Digital Radio User Manual 3 Options 3.1 Protection Systems The L54 Digital Microwave Radio linking is operated in protected configuration by the addition of an indoor rack-mounted protection switching shelf and another standby radio terminal. The ODU arrangements may use either one antenna with a waveguide coupler or two antennas.

  • Page 18: Network Management

    DTS Broadcast PDH Microwave Digital Radio User Manual 3.2 Network Management Since all control, configuration and monitoring functions of the radio are already software controlled from the 10BASE-T port; the radio is ideally suited to interface with external Network Management Systems.
  • Page 19 DTS Broadcast PDH Microwave Digital Radio User Manual Figure 3-1 110~220VAC to -48VDC converter We also support a 110~220VAC to -48VDC convertor for 100~240VAC power input. See Figure 3-8. Features: 3KA surge protection Output Over current protection Output Over voltage protection...

  • Page 20: Installations

    DTS Broadcast PDH Microwave Digital Radio User Manual 4 Installations 4.1 General This Section assumes that pre-planning of the link has occurred; i.e. path budgeting and survey to ensure good line-of-sight between the two link ends and cable run estimations.
  • Page 21 DTS Broadcast PDH Microwave Digital Radio User Manual 4.3 Equipment Inventory Check Verify inventory of L54 Digital Microwave Radio components before beginning installation. Ensure the part description detailed on the outside of each box corresponds to the components required for the installation; i.e. correct ODU frequency band, T-R spacing, capacity, service interface, and IDU configuration.

  • Page 22: Cable Installation

    DTS Broadcast PDH Microwave Digital Radio User Manual 4.4 Requirement of room The room fitment should be finished and dry. The line-slot or line-through-slot, illuminance, AC power, DC power should be ready. Airiness, air-condition establishment should be supplied. Temperature and humidity should be accord with installation conditions.

  • Page 23: Odu Installation

    DTS Broadcast PDH Microwave Digital Radio User Manual 4.6 ODU Installation Figure 5-4 Connectors and Mounting of ODU -23-...

  • Page 24: Idu Installation

    DTS Broadcast PDH Microwave Digital Radio User Manual 4.7 IDU Installation The IDU requires only 1RU of vertical rack space and 254 mm rack depth. No space above or below the IDU is required for ventilation purposes. IDUs may be stacked adjacently in racks. The connections of 4/8/16E1 (75ohm unbalanced) IDU are descripted in Figure 4-4.
  • Page 25 DTS Broadcast PDH Microwave Digital Radio User Manual Table 4-3 IDU External Connection Pins Detailed Description -25-...
  • Page 26 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table 4-4 IDU External Connection Pins Detailed Description Continuous Table 4-4 IDU External Connection Pins Detailed Description -26-...
  • Page 27 DTS Broadcast PDH Microwave Digital Radio User Manual -27-...
  • Page 28 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table4-4 IDU External Connection Pins Detailed Description -28-...
  • Page 29 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table 4-4 IDU External Connection Pins Detailed Description -29-...
  • Page 30 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table 5-4 IDU External Connection Pins Detailed Description -30-...
  • Page 31 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table 4-4 IDU External Connection Pins Detailed Description -31-...
  • Page 32 DTS Broadcast PDH Microwave Digital Radio User Manual 5 Commissioning 5.1 General This section assumes that the L54 Digital Microwave Radio terminal has been successfully installed, following the guidelines outlined in Section 5. This section descripts L54 commissioning procedures, including connection, power on, setup and antenna alignment.

  • Page 33: Setup Routine

    DTS Broadcast PDH Microwave Digital Radio User Manual Step 2: Once all connections have been made, apply power to the IDU by connecting energized power connector. The L54 will now begin the start up self-diagnostic sequence. If the L54 does not appear to power up, check the applied voltage and power line, ground line.
  • Page 34 DTS Broadcast PDH Microwave Digital Radio User Manual 5.5.2 Login After powering up, the front panel will display ‘‘ ” Note: The L54 logs the operator out of the front panel after a period of inactivity longer than 30 minutes.
  • Page 35 DTS Broadcast PDH Microwave Digital Radio User Manual • Press ENT to set the traffic capacity. • The IDU will display the new setting. The RF bandwidth is 7MHz for 4E1, 14MHz for 8E1, 28MHz for 16E1, note the frequency plan.

  • Page 36: Transmit Frequency

    DTS Broadcast PDH Microwave Digital Radio User Manual 5.5.5 Transmit Frequency • Use the _keys on the IDU until the panel display “ ”, press ENT. • keys on the IDU to select T menu, press ENT. Use the •...
  • Page 37 DTS Broadcast PDH Microwave Digital Radio User Manual 5.5.7 Tributary Configuration Configurations for 4/8/16E1 service card and 10/100BASE-T+1/2/4E1: Step 1: Configure tributarys of Group A • Use the _keys on the IDU until the panel display “ ”, press ENT.

  • Page 38: Antenna Alignment

    DTS Broadcast PDH Microwave Digital Radio User Manual 5.6 Antenna Alignment For antenna installation, follow the instructions provided by the manufacturer; instructions should be packaged with the antenna. • RSSI voltage measurement via the BNC connector on the ODU, used for fine alignment, •...
  • Page 39 DTS Broadcast PDH Microwave Digital Radio User Manual 6 Operations 6.1 General Use of the LCD panel The keypad composed with 6 keys and 1 LCD and 10 LEDs of the LCD panel enable the operator to configure the terminal and diagnose terminal faults by displaying unambiguous alarms and clear real-time system status.

  • Page 40: Displaying Status

    DTS Broadcast PDH Microwave Digital Radio User Manual The beeper will beep up one time when press key is valided, otherwise beep up 2 times. There have two status of operating in LCD panel, one is displaying status, and another one is modifying status.
  • Page 41 DTS Broadcast PDH Microwave Digital Radio User Manual The Device ID and LCD panel menu options: The LCD display screens are descripted list below: The initial screen is displayed after power on, or press CLS key on another screen. Press _keys to appear similar following message: This screen display device type, software version, local or remode device ID.
  • Page 42 DTS Broadcast PDH Microwave Digital Radio User Manual 6.1.1 INFO This screen displays IDU IFRSSI gain from IDU for RX IF signal. This gain indicates RX IF signal in coxial cable fed to IDU is correct. Press <- or -> keys to view remote message.
  • Page 43 DTS Broadcast PDH Microwave Digital Radio User Manual Press ENT _key to appear similar following message: Use the _keys on the IDU to select “Y ”, and press ENT key to clear counter and count timer. Press key several times to appear similar following messages:...
  • Page 44 DTS Broadcast PDH Microwave Digital Radio User Manual Press _keys to appear similar following message: This screen displays PLL status of ODU. The RF indicates the RFLO is locked or not; the TX indicates the TX LO is locked or not, and the RX indicates the RX LO is locked or not. These display “L”...
  • Page 45 DTS Broadcast PDH Microwave Digital Radio User Manual 6.1.1.1 Messages of 4/8/16E1 service card Three E1 service cards are current available: a 4E1 version, an 8E1 version and a 16E1 version. And two interfaces for E1 service card are current available: a 75ohm unbalanced and a 120ohm balanced.
  • Page 46 DTS Broadcast PDH Microwave Digital Radio User Manual 6.1.1.2 Messages of 10/100BASE-T+1/2/4E1 service card Two interfaces for 10/100BASE-T+1/2/4E1 service card are current available: a 75ohm unbalanced of E1 interface and a 120ohm balanced or E1 interface. All 10/100BASE-T+1/2/4E1 service cards have same messages for displaying list below: The E1 avalible capacity is 0x2M, 1x2M, 2x2M and 4x2M.
  • Page 47 DTS Broadcast PDH Microwave Digital Radio User Manual 6.1.2 SET These parameters in the screens under SET menu can be edited, including local and remote IDU or ODU. Press ENT key when move cursor to SET menu in the screen “...
  • Page 48 DTS Broadcast PDH Microwave Digital Radio User Manual This screen shows parameter of system capacity when use 4/8/16E1 service card. The options are shown as rates such as 4x2M, 8x2M and 16x2M. And the RF bandwidths are 7MHz for 4x2M, 14MHz for 8x2M and 28MHz for 16x2M.
  • Page 49 DTS Broadcast PDH Microwave Digital Radio User Manual This screen shows RF channel number. The parameter is the option for RF channel , and the channel number depend on factory or customize. Note: In systems of 7/8GHz 13GHz and 15GHz frequency, the spacing is set in the channel plan installed in the factory so that receiver frequency changes to track the transmitter;...
  • Page 50 DTS Broadcast PDH Microwave Digital Radio User Manual Configure group A: • Use the keys on the IDU until the panel display “ ”, press ENT. • Use the keys on the IDU to select “1” menu . • Use the _keys on the IDU to select the required status of tributary #1.
  • Page 51 DTS Broadcast PDH Microwave Digital Radio User Manual These parameters are stored in EEPROM. • Use the _keys on the IDU until the panel display “ ”, press ENT. • keys on the IDU to select “dBm” menu, press ENT .
  • Page 52 DTS Broadcast PDH Microwave Digital Radio User Manual • Use the keys on the IDU until the panel display “ ”, press ENT. • Use the keys on the IDU to select “dBm” menu, press ENT. • Use the . keys on the IDU to select the required ATPC level.
  • Page 53 DTS Broadcast PDH Microwave Digital Radio User Manual • Use the _keys on the IDU until the panel display “ ”, press ENT. • Use the keys on the IDU to select the transmit power alarm threshold. • Press ENT to set the threshold.
  • Page 54 DTS Broadcast PDH Microwave Digital Radio User Manual 6.1.3 OTHERS The Others menu has serveral screens for displaying or modifying the other parameters listed below: This screen shows 4 alarm inputs. The alarm input is located in the local IDU DB25 ALARM RELAYS connector (see Table 4-5).
  • Page 55 DTS Broadcast PDH Microwave Digital Radio User Manual The alarm condition is no affectivity to the relay output if select “N”. To set relay 1 output: • Use the _keys on the IDU until the panel display “ ”, press ENT.
  • Page 56 DTS Broadcast PDH Microwave Digital Radio User Manual To set Web Modify: Eable/Disable browser function Use the _keys on the IDU until the panel display “ ”, • Use the keys on the IDU to select the alarm condition, and use the _keys to select Enable or Disable.
  • Page 57 DTS Broadcast PDH Microwave Digital Radio User Manual This screen displays current time. The parameter can be modified, used for counter, log, etc. This screen displays current date. The parameter can be modified, used for counter, log, etc. 6.2 Configure with WEB server We can monitor and contoll the terminal by using Internet Expoler to access WEB server included in the IDU.
  • Page 58 DTS Broadcast PDH Microwave Digital Radio User Manual Press _keys to appear similar following message: This screen display device type, software version, local or remode device ID. The ID is used for identifying device; it can be modified for monitor. The ID code is same as the last code of IP addr in IDU.
  • Page 59 DTS Broadcast PDH Microwave Digital Radio User Manual There are ADMIN users can operate this WEB page: The ADMIN can modify parameters of terminal. Enter the User name and password. The passwords are “ ADMIN ” default(must be this same), can be modified by the access PAGE.
  • Page 60 DTS Broadcast PDH Microwave Digital Radio User Manual Frequency Configuration: Two parameters are list below for configure in this web page: TX and RX Frequency. In systems of 7/8GHz 13GHz and 15GHz frequency, the T-R spacing is set in the channel plan installed in the factory so that receiver frequency changes to track the transmitter;...
  • Page 61 DTS Broadcast PDH Microwave Digital Radio User Manual Transmit Configure: There are 4 parameters for transmit configuration: Transmit power; Transmit on/off; ATPC monitor level ATPC on/off; (It’s unvalidity.) See Figure 6-6. Figure 6-6 Transmit Configuration -61-...
  • Page 62 DTS Broadcast PDH Microwave Digital Radio User Manual Station configuration For site management, the IDU contains two names each consisted with 12 symbols: Station Name and Company Name. See Figure 6-7. Figure 6-7 Station Name Configuration -62-...
  • Page 63 DTS Broadcast PDH Microwave Digital Radio User Manual Traffic capacity configuration The traffic capacity can be configured with required rate by this web page. The options are shown as rates such as 7MHz, 14MHz, 28MHz and 56MHz. When use 4/8/16E1 service card, the RF bandwidths are 7MHz for 4x2M, 14MHz for 8x2M, 28MHz for 16x2M, and 56MHz is not used.
  • Page 64 DTS Broadcast PDH Microwave Digital Radio User Manual Configure thresholds of alarms: See Figure 6-9 for configure thresholds of BER alarm and RSL alarm. Figure 6-9 Alarm Configurations -64-...
  • Page 65 DTS Broadcast PDH Microwave Digital Radio User Manual Tributary configuration: See Figure 6-10 GA1~GA4: The Tribs 1 to 4 for group A GB1~GB4: The Tribs 1 to 4 for group B GC1~GC4: The Tribs 1 to 4 for group C GD1~GD4: The Tribs 1 to 4 for group D Configurations of GA1~GA4 are valid for 4E1 servicr card.
  • Page 66 DTS Broadcast PDH Microwave Digital Radio User Manual Alarm Relays configuration: See Figure 6-10 to configure alarm relays, i.e, and Cable alarm to relay 1. Figure 6-10 Alarm Relays Configuration -66-...
  • Page 67 DTS Broadcast PDH Microwave Digital Radio User Manual Protection Configuration: The function is valid as save as the panel of protected switch when the IDU work in protection mode, prefer to section 7.2. Figure 6-11 Protection system Configuration -67-...
  • Page 68 DTS Broadcast PDH Microwave Digital Radio User Manual Device Date time configuration: Two parameters can be configured: Device Date time and Count-time for Stat… Figure 6-12 Device Time Configurations -68-...
  • Page 69 DTS Broadcast PDH Microwave Digital Radio User Manual Testing: Used for LOOP back testing. See Figure 6-13. Figure 6-13 Loop Test Configurations -69-...
  • Page 70 DTS Broadcast PDH Microwave Digital Radio User Manual Access Modifying: Use this Access Modifying to modify password. See figure 6-14. Figure 6-14 Access Modifying -70-...
  • Page 71 DTS Broadcast PDH Microwave Digital Radio User Manual Log: The Log records parameters configuration, login, etc. See 6-15. Figure 6-15 Logs -71-...
  • Page 72 DTS Broadcast PDH Microwave Digital Radio User Manual Stat.: Stat. is used for link performance stat. The records of Stat. are: BER, RSL and transmit power every count-time of Stat. See Figure 6-16. Figure 6-16 Stat. -72-...

  • Page 73: Protection Systems

    DTS Broadcast PDH Microwave Digital Radio User Manual 7 Protection systems 7.1 General Protection Systems are used to improve link reliability and availability. The L54 Protection System may operate in one of the following modes, depending on customer requirements: Hot Standby: Both terminals are powered on, and set to the same frequency, but one terminal’s transmitter is muted to prevent interference.

  • Page 74: Protection Switch

    DTS Broadcast PDH Microwave Digital Radio User Manual 7.2 Switching Conditions and Operation The protected system provides link continuity in the event that a fault occurs in the primary radio. The switch is activated by an alarm condition in the primary link. The following alarm conditions will trigger a switch from primary to secondary IDU: 1.
  • Page 75 DTS Broadcast PDH Microwave Digital Radio User Manual The service card in IDUs will be replaced by switch-connection card. And the service card will mounted in protection switch. Traffic connections between the protection shelf and IDUs are made on the front panel. The traffic interfaces are SCSI68 and RJ-45.
  • Page 76 DTS Broadcast PDH Microwave Digital Radio User Manual 7.5 ODU configuration A protected configuration typically consists of redundant IDUs and ODUs and a waveguide coupler to connect the two ODUs to a single antenna port. If desired a second antenna may be used instead of the waveguide coupler, providing protection against an antenna falling out of alignment.
  • Page 77 DTS Broadcast PDH Microwave Digital Radio User Manual 7.7 System Installation 7.7.1 General This section covers only procedures unique to installing a protection system. Where necessary, references to Section 4 (Installation) are made for specific guidelines on how to install ODUs, IDUs, and cables.
  • Page 78 DTS Broadcast PDH Microwave Digital Radio User Manual 7.7.6 IDU and Protection Switch Installation The protected IDUs and protection switches require only 254mm rack depth and 1RU of vertical rack space. No space above, below or between the units is required for ventilation purposes as the whole system dissipates less than 25 W.
  • Page 79 DTS Broadcast PDH Microwave Digital Radio User Manual 7.8 Commissioning The Protection System Before applying power to the system, select the relevant protection mode of operation for the installation on the redundant system controller front panel using the two-position rocker switch located on the right side of the shelf.
  • Page 80 DTS Broadcast PDH Microwave Digital Radio User Manual 7.8.2 Frequency Diversity Mode Use Section 5 as a general guide, but read the following instructions first: 1. Verify that all interconnect cables are installed. Power up the upper IDU only. Set upper IDU Traffic Capacity, Frequency, Transmit Power, Link ID Code and Tributary Configuration per Section 6.5.
  • Page 81 DTS Broadcast PDH Microwave Digital Radio User Manual 7.8.3 Space Diversity Mode Space Diversity requires the dual ODU/dual antenna configuration. Use Section 5 as a general guide, but read the following instructions first: 1. Verify that all interconnect cables are installed.
  • Page 82 DTS Broadcast PDH Microwave Digital Radio User Manual 8 Network Management Systems (NMS) 8.1 Overview The NMS of microwave radio is used for monitor device’s operating status, calculate the performance of microwave link, locate fault and control operating mode of microwave radio.
  • Page 83 DTS Broadcast PDH Microwave Digital Radio User Manual 8.1.1 Connections of NMS The IDU have two interfaces for NMS connection: Ethernet and RS232. The RS232 is used for software update, here is reserved. The Ethernet is used for SNMP/NMS. The protocols are:...

  • Page 84: Installation

    DTS Broadcast PDH Microwave Digital Radio User Manual 8.2 Connectors The connectors of NMS in IDU are: RS232 and Ethernet listed below: Figure 8-3 NMS connector on IDU The RS232 for software update use RJ-45 connector. The Ethernet for SNMP/NMS use RJ-45 connector.

  • Page 85: Troubleshooting

    DTS Broadcast PDH Microwave Digital Radio User Manual 9 Troubleshooting 9.1 General This section describes the features available to assist the operator in tracking and correcting L54 radio problems. These features include a series of discrete alarm functions that will assist in tracking both configuration errors and radio failure conditions using the front panel controls at one end of a working radio link.
  • Page 86 DTS Broadcast PDH Microwave Digital Radio User Manual Note. The most common reason for this alarm occurrence will be due to a link fade, such as that occurring during excessive rainfall. BER alarm Alarm condition indicates the received BER has exceeded the preset Alarm threshold. The action required to resolve the fault will depend upon all the accompanying alarms.
  • Page 87 DTS Broadcast PDH Microwave Digital Radio User Manual If resistance is unmeasurable: • Cable is open circuit • Check the cable thoroughly over whole length and at both ends for damage or reasons that would cause an open circuit condition (e.g. connector not terminated correctly and/or badly corroded or cable cut) •...
  • Page 88 DTS Broadcast PDH Microwave Digital Radio User Manual Receive Level Alarm condition indicates the receive RF level is below the preset threshold. If alarm occurs on its own, verify RSL, RF path between L54 terminals, antenna alignment and remote terminal transmitter power output setting.
  • Page 89 DTS Broadcast PDH Microwave Digital Radio User Manual 9.3 Troubleshooting Using the Front Panel LCD &LED 9.3.1 Summary LED Alarm Display 10 LEDs are list below: The TEST LED is yellow. The WORK LED and PWR LED are green. And the others are red. See Table 9-1.
  • Page 90 DTS Broadcast PDH Microwave Digital Radio User Manual 9.3.2 LCD screens of ALARMS The LCD will show and flicker the screens witch alarm occurred when the option of J-LCD Alarm is ON and no press any key for 20 seconds or press CLR first and then press ENT. See Table 9-2.
  • Page 91 DTS Broadcast PDH Microwave Digital Radio User Manual 9.4 Troubleshooting Quick Reference Guide Table 9-3 Troubleshooting Quick Reference Guide -91-...

  • Page 92: Alarm Relays

    DTS Broadcast PDH Microwave Digital Radio User Manual 9.5 Alarm Relays The alarm relays are presented on the front panel of the IDU. “Form C” relay outputs are presented on the L54 IDU front panel ALARM RELAYS DB25 connector. •...
  • Page 93 DTS Broadcast PDH Microwave Digital Radio User Manual Local Frame Loopback: This loopback is used for locating faults in equipment by routing a tributary input (data from customer) directly to the corresponding tributary output (data to customer). Any combination of tributaries may be configured for loopback.

  • Page 94: Maintenance

    DTS Broadcast PDH Microwave Digital Radio User Manual 9.7 Maintenance No regular maintenance of the L54 installation is necessary. If a fault occurs, the system is sufficiently well alarmed and has diagnostics to allow the operator to rapidly and precisely locate the source of the fault condition.
  • Page 95 DTS Broadcast PDH Microwave Digital Radio User Manual 10 Technicaal data 10.1 Specification Table 10-1 General Specification -95-...
  • Page 96 DTS Broadcast PDH Microwave Digital Radio User Manual Table 10-2 Controlling ODU specifications Table 10-3 Mechanical specifications -96-...
  • Page 97 DTS Broadcast PDH Microwave Digital Radio User Manual Table 10-4 Transmitter & Receiver -97-...
  • Page 98 DTS Broadcast PDH Microwave Digital Radio User Manual Table 10- 5 Others specifications -98-...

  • Page 99: Default Configuration

    DTS Broadcast PDH Microwave Digital Radio User Manual 10.2 Default configuration Table 10- 6 Default software configuration -99-...
  • Page 100 DTS Broadcast PDH Microwave Digital Radio User Manual Continuous Table 10- 7 Default software configuration -100-...
  • Page 101 DTS Broadcast PDH Microwave Digital Radio User Manual Table 10- 8 Alarm Relay Configuration -101-...
  • Page 102 DTS Broadcast PDH Microwave Digital Radio User Manual Table 10- 9 LCD Configuration -102-...

  • Page 103: Symbols And Abbreviations

    DTS Broadcast PDH Microwave Digital Radio User Manual 11 Symbols and abbreviations 11.1 Symbols • deciBel • deciBel relative to 1 milliwatt • GigaHertz • kiloHertz • Mbit/s Megabits per second • MegaHertz • parts per million 11.2 Abbreviations •...

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