DTS L54 Series User Manual

L54 Series Digital STL Radios

User Manual

Ver 1.0.1

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.

Do not allow people to come in close proximity to the front of the antenna while the transmitter is operating. The antenna will be professional installed on fixed-mounted outdoor permanent structures to provide separation from any other antenna and all persons. WARNING: RF Energy Exposure Limits and Applicable Rules for 6-38 GHz. It is recommended that the radio equipment operator refer to the RF exposure rules and precaution for each frequency band and other applicable rules and precautions with respect to transmitters, facilities, and operations that may affect the environment due to RF emissions for each radio equipment deployment site.

Appropriate warning signs must be properly placed and posted at the equipment site and access entries.

Protection from Lightning

Article 810 of the US National Electric Department of Energy Handbook 1996 specifies that radio and television lead-in cables must have adequate surge protection at or near the point of entry to th e building. The code specifies that any shielded cable from an external antenna must have the shield directly connected to a 10 AWG wire that connects to the building ground electrode.

Do not turn on power before reading documentation. This device has a -48 VDC direct current input.

Protection from RF Burns

It is hazardous to look into or stand in front of an active antenna aperture. Do not stand in front of or look into an antenna without first ensuring the associated transmitter or transmitters are switched off. Do not look into the waveguide port of an ODU (if applicable) when the radio is active.

Risk of Personal Injury from Fiber Optics

DANGER: Invisible laser radiation. Avoid direct eye exposure to the end of a fiber, fiber cord, or fiber

pigtail. The infrared light used in fiber optics systems is invisible, but can cause serious injury to the eye.

WARNING: Never touch exposed fiber with any part of your body. Fiber fragments can enter the skin and are difficult to detect and remove.

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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.

Warning – Turn off all power before servicing

Warning – Turn off all power before servicing.

Safety Requirements

Safety requirements require a switch be employed between external and internal power supplies.

Proper Disposal

The manufacture of the equipment described herein has required the extraction and use of natural resources. Improper disposal may contaminate the environment and present a health risk due to the release of hazardous substances contained within. To avoid dissemination of these substances into our environment, and to lessen the demand on natural resources, we encourage you to use the appropriate recycling systems for disposal. These systems will reuse or recycle most of the materials found in this equipment in a sound way. Please contact CarrierComm or your supplier for more information on the proper disposal of this equipment.

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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. Applications include PCS/PCN micro-cell fixed network infrastructure, cellular back-haul interconnections. And now the L54 has been used in application s such as military and private networks for government, educational institutions, banks and commercial organizations.

The L54 is designed for data rates including 4x 2.048 Mb/s (4E1), 8x 2.048 Mb/s (8E1), 16x

2.048 Mb/s (16E1), 10/100BASE-T+ 1/2/4 E1 (14MHz or 28MHz) in protected and unprotected configurations.

Indoor Units (IDUs) are muilti fuctional; configure flexial, small, and reliable, support capacities including 4E1, 8E1, 16E1, 10/100BA SE-T+1/2/4E1. And IDU supports 2 auxialy data channel s, a phone channel, a 10BASE-T and RS232 network management channel. Meanwhile, we can get the BER, RSL and working status of equipment, and control the working status by NMS or LCD panel.

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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

• Frequency/channel setting via LCD panel or NMS

• Diagnostic loopbacks accessible via LCD panel or NMS

• 253 different Device ID codes

• Selectable traffic capacity

• The same IDU support all different service pulgin, such as 4/8/16E1, 10/100BASE-T

• Software adaptive service pulg in

• Auxiliary Alarm input and Relays output

• Digital Modulator and Demodulator, Forward-Error-Correction (FEC)

• High sensitivity and high system gain

• Low power consumption, use 3.3V and 1.5V working voltage

• Standard radio IF frequencies on the cable: 310MHz/70MHz

• No cable length settings or adjustments required, RG-6/U cable up to 100m

• Protection Switch Option available

• SNMP (NMI) Option available

• WEB Server supported for network management

• 1 Rack Unit (RU) high, 19” wide

• The same IDU support all different service pulgin

• 4 external alarm input sensor as standard

• 5 alarm relay outputs as standard

• Front panel keypad access to control and diagnostics features

Control:

• Link Capacity select

• Frequency of operation

• Transmitter Power adjustment

• Dvice ID

• Tributary status

• Transmitter On/Off

• ATPC

Diagnostics:

• Beep and Light Alarm

• RSSI

• Current BER

• Alarm summary status

• Transmitter Power Status

• Auto Locate Alarm and display

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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. The RJ-45 connector on the IDU front panel provides a 10BASE-T interface to a standard IBM compatible PC running Microsoft Windos@. The software functions include all commands to configure a terminal, the alarms and monitor performance. The configuration of both the local and remote terminals can be displayed and changed from one end of the link. In additional, if connect network interfaces together, multi terminals are managed from one terminal.

We can monitor transmit/receive frequencies, transmit power level, device ID code, receive level alarm points, remote and local loopbacks, etc. See Figure 2.1 for LCD panel.

Figure 2-1 LCD Panel

The IDU keys are Up, Down, Left, Right, Clear and Enter. These front panel keys provide all of the on-site controls required to install, test, and commission a link. This can be done without any external test equipment, resulting in major time and cost savings.

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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.

Figure 2-2 WEB based main screen

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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. This single cable feeds DC power to the ODU from the IDU and supports bi-directional traffic, alarm and control signals.

This basic structure is used for the full frequency range from 1 to 23 GHz to maximize flexibility, commonality of spare parts and interchangeability. This universal radio basic structure is illustrated in Figure 2-3. The primary frequency dependent components are the antenna and several modules within the ODU including the transmit hybrid, receive hybrid and diplexer. The IDU is frequency independent and the ODU is capacity independent. The network management system supports digital microwave radios of all bands. NMS interface and auxiliary data interfaces are available in the IDU to support Network Management, Auxiliary Data Channels, 1+1 Protection Interface or other custom interfaces.

Tributary data and service channels, radio overhead and network management information at the local terminal are fed to the IDU. The IDU DSP converts the tributary data to TTL level signals and multiplexes them with the service channels onto an aggregate data stream. The IDU digital modem modulates the aggregate signal to create an Intermediate Frequency (IF) signal. The IF signal is superimposed with DC power and sent to the ODU on a coaxial cable. The ODU converts the IF signal to a Radio Frequency (RF) signal to the antenna of the remote terminal. At the remote terminal ODU, the received signal is converted back to an IF signal. The IF signal is fed through the coaxial cable to the IDU, where it is demodulated and de-multiplexed into tributary data and the auxiliary service channels. The link is full duplex (bi-directional), fully symmetrical and transparent to the data stream.

Figure 2-3 L54 Product Basic Structure

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2.4.1 IDU

The L54 IDU is a 1RU rack-mountable assembly desig ned fo r 19 -i nc h 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. Different services have different interface, another way, different service should configure different service plug-in. The IDU is independent of any frequency band thus simplifying maintenance and lowering the overall cost of sparing.

Figure 2-4 IDU for 4/8/16 E1(75ohm unbalnaced) service card

Figure 2-5 IDU for 10/100BASE-T+ 1/ 2/ 4 E1 (7 5 ohm unbalnaced) service card

Figure 2-6 IDU for 4/8/16 E1 (120ohm balnaced) service card

Figure 2-7 IDU for 10/100BASE-T+1/2/4 E1 (120ohm balnaced) service card

Figure 2-8 IDU for 1 +1

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See Figure 2-9 for IDU panel with no plug-i n card . See Fig ure 2-1 0 f or 4/8/16E1 75ohm unbalanced plug-in. See 2-11 for 4/8/ 1 6E 1 1 20 o hm balanced plug-in. See Figure 2-12 for 10/100BASE-T+1/2/4E1 120ohm balanced plug-in.

Position of service card

Figure 2-9 IDU without service card

Figure 2-10 4/8/16 E1 (75ohm unbalanced) s ervi ce car d

Figure 2-11 4/8/16E1 (120ohm balanced) service card

Figure 2-12 10/100BASE-T+1/2/4E1 (120ohm balanced) serv ice card

• The SC4E1-Be for service card of 2E1, plugin port 1,2 of TRIBS to connect,

the others not effectively.

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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

Figure 2-14 4E1 (120ohm balanced) service card

Figure 2-15 4 Prots 10/100BASE-T service card

The main functions of the IDU are data interface card (plug-in), frame multiplexing, diplexer, modulator, demodulator, DC-DC converter, and CPU alarm/status monitoring and site-to-site communications. See Figure 2-16 for block di ag ram of the IDU.

The optional service plug-in cards are carried Tributary Service Data, multiplexed with Auxiliary Data, EOW Data and CPU site-to-site communication messages in Frame-Mux block. The multiplexed data will be modulated, forms QPSK signal with 310MHz carrier, and send to ODU by IF cable through diplexer.

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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.

The CPU in IDU monitors the device running, and communicates with NMS. The DC-DC module in IDU is feed by -48V and supports 3.3V, 5V and 1.5 V for system The IDU-ODU communicating module supports communication between IDU and ODU. The IDU can configure frequency and monitors status of ODU by this module.

The modulator of QPSK modem in IDU has functions list below: See Figure 2-17.

Convolutive Coder with 7/8 puncture rate. Digital interpolation filters I/Q modulater with 310MHz IF signal. IF signal amplifier. PLL module with 310MHz for modulate

Figure 2-16 Block diagram of the IDU

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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

Nyquist Root and Interpolation Filters

FEC Modes

I/Q demodulater with 70MHz IF signal

PLL module with 70MHz for demodulate

Figure 2-18 Block diagram of the QPSK demodulator

The 4/8/16E1 Service pulg-in card in IDU has functions detailed in Figure 2-19.

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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. Samely, the 4 E2 data streams received from remote by IDU mother board are de-multiplexed into 16 tributary datas by the DSP in service card. And also, the sevice card monitors alarms of tribs, and controls tributary loopback. The interface of tributary has two types, such as 120ohm balanced and 75ohm unbalanced.

Figure 2-19 Block diagram of the 4/8/16E1 service card

The 10/100BASE-T+1/2/4E1 Service pulg-in card in IDU has functions detailed in Figure 2-20.

4 tributary datas and 1 10/100base-t data are fed to this service card in IDU. The DSP in service card converts the tributary datas and 10/100base-t data 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. Samely, the 4 E2 data streams received from remote by IDU mother board are de-multiplexed into 4 tributary datas and 1 10/100base-t data by the DSP in service card. And also, the sevice card monitors alarms of tribs, and controls tributary loopback. The interface of tributary has two types, such as 120ohm balanced and 75ohm unbalanced.

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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. See figure 2-21.

Figure 2-21 Signals in IF Cable

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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.

• B. ACT Indicator (ACT): This indicator lights up on receiving signal from the IDU.

• C. Power Indicator: ODU’s power indicator light. When all the connection cables are well

connected, switch ON the IDU’s power. The ODU will be provided a power of -48VDC through the IF cables by the IDU.

• D. Receive Signal Strength Indicator (RSSI): For better antenan alignment between two terminals

at a longer distance, please rotate and open the BNC 50_. Use muilt-meter to measure the RSSI voltage. Weak voltage indicates weak signal received, strong signal indicates the most accurate andle position.

• E. Antenna Interface (TO ANT): Use N-type coaxial cable to connect the Antenna.

• F. IP Port (N-Type 50_): Transmission includes transmitter 310MHz, receiver 70MHz, telemetry

signal, and DC -48V. Maximum transmitter of 100M possible when using RG-6 cable. Maximum transmission 200M possible when using RG-8 cabl e.

• At E & F interface, please entwine waterproof tape at the connection point so as to

prevent rainwater or mositure from the device. Narural damage is not warranted.

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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 wi t h a waveguide coupler or two antennas.

The switching protection shelf may be operated in one of three modes:

Hot-Standby

Only one transmitter is on-line at any one time. Both main and standby terminals are tuned to the same frequency. A fault detected in the on-line radio terminal results in a switch of traffic to the off-line radio terminal. The ODU arrangements may use either one antenna wi t h a waveguide coupler or two antennas.

Frequency Diversity

The main and standby radios are transmitting simultaneously and are tuned to different frequencies to avoid interference. A fault detected in a traffic-carrying radio terminal results in a switch of customer traffic to the standby radio link. The ODU arrangements may use either one antenna wi t h a waveguide coupler or two antennas.

Space Diversity

The main and stand-by radios are set up in Hot Stand-by mode, but are connected to their own antennas. The spatial separation of the antennas, combined with hitless receive switching, provides the Space Diversity function on the receiving end of the link.

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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.

The standard NMI option offers SNMP compatibility for management of radio systems. With the use of a browser such as “HP Openview” or “SNMPc”, the operator may view and configure any radio terminal in a network from a single point.

Options to support other Network Management protocols can also be easily accommodated as the NMI is built on a powerful hardware platform.

For details regarding installation of NMI option, refer to Section 9.

3.3 110~220VAC to -48VDC converter

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Figure 3-1 110~220VAC to -48VDC con ver t e r

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 Wide AC input voltage range: 100VAC~240VAC

Table 3-1 110~220VAC to -48VDC converter technical data:

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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.

Installation task is listed below:

• Equipment and Tools Required

• Equipment Inventory

• Cable Installation

• ODU Installation

• IDU Installation

4.2 Required Installation Equipment

4.2.1 Tools

The only tools needed to install the L54 Digital Microwave Radio are:

• Basic electrician toolkit (incl. voltmeter)

• Adjustable wrench (5-20mm)

• Tools suitable for IF cable, ground line, service data line.i.e. nipper, plier, iron, and so on.

4.2.2 Equipment

Assuming the installer has the necessary radio equipment and antenna, the only other items needed are:

• RG-6/U length cable that to suit installation. See Section 4.5 for advice on which cable to use.

• At least two N-type connectors is suitable for termination of the RG-6/U cable.

• To ground the IDU, a suitable length of green PVC insulated 14gauge wire (1.5 mm

conductor) minimum is required, plus a suitable crimp lug to attach wire to the IDU ground post (4 mm / 0.064 in. diameter).

• To power the IDU, suitable lengths of different colored PVC insulated 14 gauge wire (1.5mm

conductor) are required. Recommend the use of red for 0 V power connections and black for negative power connection.

• To connect alarm relay outputs and external input sensor from IDU to other co-located

equipment; a suitable length of 25-pin tin-plated PVC insulated copper cable, a male DB25 connector and cover._ enough cable ties to secure all cable runs.

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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. The radio configuration is determined by the Customer Specific Data Sheet that has been agreed upon by the customer. See 10.2 for an example showing the factory default settings.

The basic components of IDU required are contained in a box: refer to table 4-1

Table 4-1 Package List

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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.

Earthing of the building should be finished and checked out.

4.5 Cable Installation

Only one cable is required to connect the IDU to the ODU. TNC to N-type of the cable must be terminated with male connectors. The TNC to N-type male connectors for RG/6U cable are supplied with radio equipment. Cable length required by the customer as the length required depends upon cable length used for each installation, and limited with cable type used and power supply voltage as follows:

Table 5-2 Cable Length Limitations:

Caution: Power for the ODU is carried on the coaxial cable connecting the IDU and ODU. Ensure that power to the IDU is turned off before connecting or removing the cable from the ODU.

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4.6 ODU Installation

Figure 5-4 Connectors and Mounting of ODU

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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. The deffrents between diffrent service-type connections only are main services; refer to service card descriptions in section 1.

Figure 4-5 Connectors of IDU for 4/8/16E1 75ohm unbalanced Service card

IDU Installation Procedure

Step 1. Position the IDU as required in the equipment rack. Step 2.Lay in, secure with cable ties and terminate ground cable. Step 3. Tighten the TNC connector on the IDU “ODU” connectors.

Step 4. Install tributary data signal cables on the IDU “TRIB” connectors. Use 75ohm CC4 male connectors and CC4-8G or CC4-16G connectors for 4/8/16E1 unbalanced systems, RJ-45 plugs for 4/8/16E1 balanced systems and 10/100BASE-T system. Refer to the Table 4-4 for RJ-45 and DB37 wiring details.

Step 5. If required, install alarm relay wiring to female DB15 connector on IDU front panel. Refer to the Table 4-3.

Step 6. If required, install auxally data wiring to RJ-45 connector on IDU front panel. Refer to the Table 5-3.

Step 5. Install phone wiring to RJ-11 phone connector on IDU front panel.

Step 8. The L54 requires DC power -48V ( -40VDC ~ -60VDC) via a 2-pin connector. Ensure that the plug provided in the installation kit is wired as detailed in table 5-3. Recommend use of 1.5mm 2 conductor wire. Make sure power is off be fore power on the device.

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