GE MDS LEDR400S-74 LEDR 400S Microwave Radio User Manual 3627C LEDR Body

GE MDS LLC LEDR 400S Microwave Radio 3627C LEDR Body

Contents

Operating Instructions Part 2 of 2

MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 938.0 UPGRADING LEDR FIRMWARE8.1 IntroductionThe LEDR radio’s firmware can be upgraded with new software releases that may be issued from time-to-time by Microwave Data Sys-tems. To support firmware upgrades while the radio is in use, the LEDR radio contains two complete copies of its firmware. Once the inactive version is replaced, the radio can be rebooted using the code in the new firmware. However, if an error occurs during the download, the radio can easily recover because it always has a complete copy of firmware available.Reprogramming can be done through three common options:1. Locally through the front panel CONSOLE Port .2. Locally using TFTP and Telnet through the ETHERNET Port .3. Remotely over a network connection using TFTP and Telnet to the ETHERNET Port .The procedures that follow use one or both of two utilities found in MDS’ LEDR Utilities package. These utilities will facilitate local and remote transferring of firmware files to and from the LEDR radio. These applications are available from Microwave Data Systems on floppy disk (P/N 03-3631A01) or on MDS’ Internet sites FTP section of the primary site of www.microwavedata.com.The following sections will explain how to program new firmware into the radio using each of the three connection options. They assume the LEDR Utilities are installed on each computer system named in the pro-cedure.NOTE: The ETHERNET, SERVICE CHANNEL and CONSOLE Ports share a common data channel when loading firmware over-the-air. Transferring the radio firmware image file (≈ 1 MB), may take up to 30 minutes if there is other activity on any of the other ports. Regardless of your connection to the LEDR radio, loading data/firmware into the radio’s SRAM is much slower than loading software onto a PC hard drive or RAM.
94 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C8.2 OPTION 1: Uploading Firmware via the CONSOLE PortThis method of upgrading the firmware is well suited to field service personnel that carry a laptop PC to field installation. Any computer run-ning the Windows operating system is suitable. Figure 17 shows the basic arrangement.Invisible place holderFigure 17. Direct connection through the LEDR CONSOLE PortSetupConnect a PC to the radio’s front panel CONSOLE Port using a 9-pin RS-232 cable. (See Figure 33 on Page 129 for cable wiring details.) The CONSOLE Port supports RS-232 at 9600 bps to 38.4 kbps.Download Procedure1. Start the MDS MDS Flash Utility application. 2. From the View>Options menu, select the appropriate COM Port and baud rate. Ensure that autobaud is enabled (Look in the lower right-hand corner of the Flash Utility window). 3. From the View menu, select console. This will bring up a NMS win-dow to the LEDR radio. At the LEDR> prompt, enter a login name and password and then close the session. 4. Using the File|Open dialog, select the directory where the new firm-ware is located. In the file window, highlight the correct (.mpk) file and then press the green start arrow. FLASHUTILITYCOM1, 2, ETC.(DTE)9-PIN SERIAL CABLECONSOLE PORT(DCE)INITIATE UPLOADFROM HERELEDR RADIO UNITWINDOWS PC
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 95Verification and Reboot1. To verify the correct operation of the new firmware, open the NMS again by pressing Alt + L. Enter boot to determine which image is currently active. This command will respond as follows:boot: Image 1 is Active or, boot: Image 2 is Active2. The new firmware is downloaded into the inactive image. Therefore, if the radio responded Image 1 is Active, enter “image verify” com-mand, iverify 2, otherwise, enter iverify 1. The radio will respond indi-cating whether or not the image has been verified as being a valid file, it will not determine if the contents are complementary to the other firmware image. If the image does not verify, try downloading the firmware again into the radio.NOTE: The following paragraph describes rebooting the radio. Thisaction will disrupt the communications link.3. Once the image has been verified, the radio must be rebooted using the new firmware. This is done by entering the command boot 1 or boot 2, where the 1 or 2 corresponds with the image number used with the iverify command above.4. Once the radio has rebooted and Flash Utility screen displays the LEDR> prompt, the firmware can be downloaded or copied into the other image. Often, copying the firmware from one image to the other can be faster than performing a second download. To copy the firmware over to the other image, simply enter icopy. The radio will prompt you for confirmation (y/n) and then begin copying.8.3 OPTION 2: Uploading Firmware Locally by Telnet via EthernetThis method can be used in the field or in a workshop by using a Win-dows computer equipped with an Ethernet interface. Figure 17 shows the basic arrangement.NOTE: You must know the IP address of the LEDR Radio and the PC that you are going to connect together. (Both units must have the same Subnet, Netmask and Gateway addresses, or at least have routes to one another.) This is essential for a direct Ethernet connection. If you do not know your Windows computer’s IP address, you can use the RUN function from the Start menu and enter winipcfg to determine your local PC’s IP address. The IP address of the radio can be found by the use of the radio’s ip command.
96 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CInvisible place holderFigure 18. Direct connection through the LEDR ETHERNET PortSetup1. Connect the PC’s Ethernet interface to the radio’s ETHERNET Port using a Category 5 Ethernet cross-over cable.2. Copy the file LEDR firmware image file (ledr.mpk) into a known directory on your PC. For example, c:\windows\LEDR\Firmware V2.5\. This directory path will be used later by the TFTP server.Download Procedure1. Launch the MDS TFTP Server on a PC connected to the LEDR radio’s ETHERNET Port through a cross-connect cable.2. Point the TFTP server to the directory from which you desire to upload the new firmware. In the SNMP TFTP server, you should execute the set root command and point to the known directory where ledr.mpk has been copied.3. Launch your Telnet application and login to the radio which you desire to load (reprogram) the firmware image file.4. Determine the active (firmware) image from which you are currently executing by typing boot. The new firmware will downloaded into the inactive image. 5. Execute the command reprogram network ledr.mpk [IP address]. In the command, in place of [IP address], you should actually type the IP address of the TFTP server. For example, reprogram network ledr.mpk 192.168.1.2& TELNET ETHERNETPORTINITIATE UPLOADFROM HERELEDR RADIO UNITLOCAL WINDOWS PCW/FIRMWARE FILESETHERNETPORTLEDR> REPROGRAM NETWORK FILENAME.MPK 192.168.X.B(CHECK STATUS: LEDR> REPROGRAM STATUS)IP ADDRESS: 192.168.X.BCROSS-OVER CABLEIP ADDRESS: 192.168.X.WTFTPSERVER
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 976. If desired, the status of the transfer during reprogramming may be displayed by typing reprogram status.7. The TFTP Server and radio will notify you when the programming is complete.Verification and Reboot1. To verify the integrity of the new firmware enter boot to determine which image is currently active. This command will respond as follows:boot: Image 1 is Active or, boot: Image 2 is ActiveIf the radio responded to the boot command with Image 1 is Active, enter the “image verify” command, iverify 2, otherwise, enter iverify 1. The radio will respond indicating whether or not the image has been verified as being a valid file, it will not determine if the contents are complementary to the other firmware image. If the image does not verify, try downloading the firmware again into the radio.NOTE: The following paragraph describes rebooting the radio. Thisaction will disrupt the communications link.2. Once the image has been verified, the radio must be rebooted using the new firmware. This is done by entering the command boot 1 or boot 2, where the 1 or 2 corresponds with the image number used with the iverify command above.3. Once the radio has rebooted and Flash Utility screen displays the LEDR> prompt, the firmware can be downloaded or copied into the other image. Often, copying the firmware from one image to the other can be faster than performing a second download. To copy the firmware over to the other image, simply enter icopy. The radio will prompt you for confirmation (y/n) and then begin copying.8.4 OPTION 3: Uploading Firmware from a Remote Server via Ethernet SetupConnect the LEDR radio’s ETHERNET connector to network which has a PC connected with the desired LEDR firmware on its hard drive. The “network” can be a local area network, a wide-area network or any IP network that can connect the two units.
98 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CThe computer hosting the firmware image, must be running a TFTP server software. If not, install, launch and configure the MDS TFTP Server software found on the LEDR Utilities disk. The setup configura-tion is shown in Figure 19.Invisible place holderFigure 19. Uploading firmware from a remote server via Ethernet Download Procedure1. Start a terminal program, such as HyperTerminal, on the local PC. 2. Log into the LEDR radio using the login command. 3. Use the ip command to ensure that the radio has a valid IP address. 4. Use the ping command from the local PC to ensure that the PC and the radio have valid routes to pass information between them.5. At the radio’s LEDR> prompt, start the download by entering repro-gram network [filename] [source PC’s IP Address]. The download can be monitored from the radio by entering reprogram status. When the download is complete the radio will sound two short beeps and the response from reprogram status will indicate that the download has finished.TFTPSERVER ETHERNETPORT9-PIN SERIALCABLECONSOLE PORT(DCE)INITIATE UPLOADFROM HERELEDR RADIO UNITREMOTE PCW/FIRMWARE FILES HUB/LAN/WAN/MANTCP/IPETHERNETPORTCOM1, 2, ETC.(DTE)TERMPROG.LEDR> REPROGRAM NETWORK FILENAME.MPK 192.168.X.B(CHECK STATUS: LEDR> REPROGRAM STATUS)IP ADDRESS: 192.168.X.BIP ADDRESS: 192.168.X.WLOCAL WINDOWS PC
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 99SNMP Option The TFTP download process can also be initiated using an SNMP man-ager. The Firmware|FwProgTable object provides a means for specifying the TFTP server IP address and the filename for the firmware.Verification and RebootWhen the download is complete, verify the firmware image and reboot the radio as described under Verification and Reboot in Paragraph See “Verification and Reboot” on Page 95 for the procedure.9.0 USING ORDERWIRE9.1 IntroductionA handset may be plugged into the front panel of the LEDR radio to allow voice communications between radio sites (see Figure 20). This can be especially useful during setup and service of the radio equipment. All radios on the network can hear what is said by any individual speaking into a handset. No other radio may transmit on the orderwire until the current speaker is finished. Depending on the number of hops, the link data rates, and Interleave setting, there may be a noticeable latency from one end of the network to the other.The front panel alert function (See “Unit ID” on Page 34) and alert com-mand (Page 51) can be used to signal all units in the network or a spe-cific radio.Normal payload data is not affected by Orderwire use. The Orderwire uses voice-compression technology that introduces a slight, but notice-able, delay in Orderwire audio.The orderwire will not interrupt the normal data flow through the LEDR data communication channel, however, it will reduce the throughput efficiency of any data communications on the Service Channel during periods of voice transmission.A handset is available from MDS (P/N 12-1307A01), which has a push-to-talk button and provides basic communication services but does not contain a built-in DTMF (tone) keypad. (The Orderwire supports the transmission of DTMF-type signaling by detecting tones at the source, and regenerating them at the receiving end, however, there are no DTMF supported radio functions in the LEDR radios.)9.2 SetupProgram the vox and volume setting for each radio. The volume setting is user preference. The vox setting requires some forethought. The higher the vox setting, the louder the user must speak to get the voice decoder to recognize the speech. This will, however, prevent noise from entering
100 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. Cthe “line.” A low vox level will recognize speech better but may transmit more noise with the speech. The user should experiment with the vox setting to determine the best level for the speaker and the noise environ-ment.9.3 Operation1. Plug the handset into the front panel jack labeled . (Figure 32 on Page 129 provides pinout details for this connector.)2. Press or at the menu’s top level until Orderwire appears on the LCD display. Press to move to the lower levels of the menu.3. To call a specific radio station, enter the Unit ID number for the sta-tion to be called. (At this point, an alert signal (“ring”) will be sent to earpiece of the handset connected to the “called” station.4. Press the PTT on handset to speak to the other station(s) listening to their handsets connected to LEDR equipment on the network. Release the handset PTT to listen. VOX (voice-activated transmit) operation is also supported. (See “vox” on Page 88.)5. Alternatively, a DTMF-style handset can be used to “dial” the required radio station.6. Remember, regardless of the number of users, only one may speak at a time.NOTE: The LEDR radio has a built-in DTMF decoder in the orderwirecircuitry. If a standard DTMF telephone test set is plugged intothe orderwire, the user can dial in the three digit unit addresson the handset to “ring” the earpiece of the handset of the asso-ciated LEDR unit.The LEDR chassis will not provide power toring a standard bell or electronic ringer.ENTER
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 101Invisible place holderFigure 20. Orderwire Connection9.4 Related NMS CommandsThe orderwire can be configured by the NMS commands or through the front panel. The earpiece volume is more easily set by the front panel controls as the level is dependent on personal preference.vox – Voice level (relative) at which speech will be detected by the soft-ware (See “vox” on Page 88)volume – Sets/displays the handset volume (See “volume” on Page 88)alert – Sends an orderwire alert to a specific radio or to all the radios on the network (See “alert” on Page 51)10.0 USING THE SERVICE CHANNEL10.1 ConceptThe Service Channel sends and receives ASCII-based information at 9600 bps in a half-duplex broadcast mode throughout the network. This means that any data coming through the Service Channel Port of a radio will be broadcast to the Service Channel of each radio in the network. There can be only one radio transmitting Service Channel data over the network at a time and the data will always be sent to every radio on the network. No other radio will be allowed to transmit until the current sender is finished.
102 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CIf a radio does receive data in the Service Channel Port while another radio is the active-sender, the data coming in the port will be queued and sent when the active sender is finished. Depending on the number of hops, link data rate, and Interleave setting, there may be a noticeable latency from one end of the network to the other.10.2 SetupThe user can configure all the Service Channel parameters for a specific radio. The port may be enabled or disabled. In the disabled state (svch port off), any data that comes in the Service Channel port will be dis-carded and any Service Channel data that comes into the radio from another radio in the network will be passed along to the rest of the net-work but not sent out the Service Channel Port. When the Service Channel Port (svch port on) is enabled, it will behave based on the other settings. The most important setting is the echo parameter. Echo is used with a terminal emulator on a PC and the program does not display on the screen character keyed in by the user.When you set up a system, you must be careful to avoid an infinite loop. If echo is enabled, then every character that enters the Service Channel port will be echoed back out the port. When echo is disabled then data that comes in the Service Channel port is not sent back out the port. Trouble may arise if the device that is connected to the Service Channel also echoes the data it sends. In that case, the device will send characters into the Service Channel Port, the radio will echo the characters back to the device, the device will consider the echoed data to be input which it will in turn echo back to the radio, etcetera, until an overflow condition occurs.You must also set the communication parameters (baud rate, stop bits, char length, and parity) via the svch subcommands so that the settings match those at the device connected to the Service Channel Port.Lastly, the user can re-initialize the Service Channel port via the svch reset command. This may be helpful in the case where an infinite loop overflow condition has locked the port.10.3 UsageThe Service Channel supports ASCII data transfer over the network in broadcast fashion. As a result, devices connected to the Service Channel Ports of different radios will appear to have a transparent half-duplex connection between them.
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 10310.4 NMS CommandsThis command is used to set/display Service Channel parameters.Usage: svch [subcommand] [<argument>] Subcommands: baudcharechooffoffonparityresetstopon—Enable the Service Channeloff—Disable the Service Channelreset—Re-initialize the Service Channelecho—on/offbaud—300, 600, 1200, 2400, 4800 and 9600char— 5, 6, 7, 8 (ASCII character length in bits)parity—none, even, oddstop—1, 2 (Stop bits)11.0 PROTECTED CONFIGURATION11.1 IntroductionThe LEDR radio can be supplied in a protected (also called redundant or “1+1”) configuration (Figure 21). The protected version is designed to perform automatic switchover to a second radio in the event of a failure in the primary unit.Protected operation is important for many mission-critical or revenue producing links. By configuring two identical LEDR radios in parallel and including a third switch box containing the RF switching circuits and the customer interfaces, it is possible to protect against failure in any of the LEDR radio sub-systems. Failures can be either malfunction or external environmental effects, such as multipath fading or nearby light-ning strikes.A Protected station consists of two standard LEDR Series radios and a Protected Switch Chassis (center unit in Figure 21). Ordinarily, the three chassis are mounted together in a “stacked” arrangement, one above the other, as shown in the figure.
104 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CThe top unit is referred to as the system’s “Unit A”, and the lower one as “Unit B”. Each unit is considered to be the “sibling” of the other. The sibling of Unit A is Unit B, and the sibling of Unit B is Unit A. This dis-tinction is used in the rdnt command found on Page 74 under the sub-heading “Read & Write Commands.”Invisible place holderFigure 21. LEDR Radio Protected VersionThe front panel of the Protected Switch Chassis (PSC) front panel has only two LEDs and an RJ-45 jack for an orderwire handset. The LEDs indicate by light and an arrow outline which LEDR chassis is active. It is assumed the two LEDR chassis will be mounted above and below the PSC as shown in Figure 21.11.2 Protected OperationDuring normal operation, one radio path is selected and the RF and interface switches are set to service that path. (The illuminated POWER LED indicator on the front panel of the Protected Switch Chassis (PSC) points to the currently active unit.) A switch in the transmitter circuitry allows one transmitter to be connected to the common ANTENNA port on the Protected Switch Chassis. On the receive path, a splitter in the Pro-tected Switch Chassis allows both radio receivers to receive the incoming RF signal for processing.The Protected Switch Chassis is a gateway for data coming and going between each of the LEDR radio units and the common data circuits connected to the PSC. The PSC monitors various RF and data signal paths for predefined fault-determining parameters. If signal conditions are not normal, the PSC’s microprocessor controller will issue an alarm and move the standby LEDR radio to the active mode.UNIT AUNIT BPSC
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 105Fault-determining parameters can be programmed from the Network Management System (NMS) software. Examples of these parameters are:• Low transmitter power• High transmitter temperature• Synthesizers is out-of-lock• Problem with the option board or framers• CPU failure wherein the CPU watchdog causes a reset• Fan faultTransmitter FailureAny failure on the “active” transmitter path will create a fault condition which will place the currently the active transmitter on standby and switch the “standby” transmitter to “active.” The newly active transmit path will remain in use until a manual changeover returns the configu-ration to the original transmitter path. This allows the link to remain fully operational until the user has replaced the faulty transmitter cir-cuitry.Receiver FailureBoth receivers are fed via an RF splitter from the antenna port. Each RF path is buffered and monitored for receive signal integrity for uncorrect-able bit-errors. If the “active” receive circuitry fails, uncorrectable bit-errors will be detected. The modem receive switch will first deter-mine that the “standby” receive path is operational (no uncorrectable bit errors) and will switch accordingly.11.3 Configuration OptionsThe protected LEDR radio is available with a number of configuration options, each designed to optimize particular system solutions:1+1 Operation—Warm or Hot StandbyIn a warm standby link, the standby transmitter is powered down. In a hot standby link, the standby transmitter is powered up and transmitted in a dummy load. The warm standby option offers the advantages of sig-nificantly reduced power consumption, since only one transmitter path is powered. However, upon transmitter failure, the switchover takes longer due to the transmitter having to be powered. Thus the hot standby mode offers the advantages of faster switchover time and increased overall system availability.
106 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CSymmetrical or Asymmetrical Receiver SplittersThe default protected radio is configured with a 3 dB splitter on the receive path, meaning that each radio’s receiver signal level is equal, but typically 4dB worse than an unprotected radio (3 dB due to splitter, plus dB cabling and additional connectors). As an option, an asymmetrical splitter (1 dB / 10 dB) is offered. Using this option, the active path is 2 dB stronger than with a symmetrical splitter (1 dB compared to 3 dB splitter loss), allowing for a better fade margin and increased system availability during normal operation.However, upon receiver change over, the receive signal strength will be significantly reduced due to the 10 dB of splitter loss rather than the equal splitter’s 3 dB loss, making the link more sensitive to fading in this temporary switched state. Providing the failed standby receiver is replaced within a short period of time, many users find that the asym-metric splitter’s increased normal performance offsets any deterioration in the temporary switched state.11.4 PSC Rear Panel ConnectorsThe following are descriptions of the rear panel connections of the Pro-tected Switch Chassis. The PSC’s rear chassis is shown in Figure 22. Figure 21 presents an inter-unit cabling diagram for protected configu-rations.Invisible place holderFigure 22. Protected Switch Chassis—Rear PanelRxAThe RXA (Receive—Radio A) connector is a N-type coaxial connector. It connects to the RX port on the rear panel of Radio A via a short coaxial cable.RxBSame as RXA, but for Radio B.AntennaThe ANTENNA connector is a N-type coaxial connector. It serves as the connection point for the station antenna.TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1Protected1234BAETHERNETSERVICE CHANNELRF CONNECTORS E1 DATAPROTECTED DATA 530 (A&B)EIA-530-A
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 107TxAThe TXA (transmit, radio A) connector is a N-type coaxial connector. It connects to the TX port on the rear panel of Radio A via a short coaxial cable.TxBSame as TXA, but for Radio B.Protected (Data)This pair of connectors accepts G.703 signals from each of the LEDR radios. The top connector is for Radio A, and the bottom connector is for Radio B. For pinout information, see Figure 36 on Page 130.E1This is a block of four RJ-45 modular connectors for connection to a multiplexer or other customer-supplied E1 equipment. For detailed pin information, Figure 34 on Page 130.These connectors are not operational on “S” Series (Subrate) radios.EthernetThe ETHERNET connector provides access to the embedded SNMP agent and other elements of the TCP/IP network management system. The connector is a standard 10 Base-T connection with an RJ-45 mod-ular connector. For detailed pin information, see Figure 34 on Page 130.530 (A&B)This pair of DB-25 connectors accepts EIA-530 data signals from each of the LEDR radios. The top connector is for Radio A, and the bottom connector is for Radio B. For pinout information, see Figure 36 on Page 130.EIA-530-AThis DB-25 connector provides a connection point for customer-sup-plied EIA-530 data equipment. Note: This port is not operational in full-rate models.Service ChannelIn a protected configuration, this DB-9 connector becomes the Service Channel connection for both LEDR radios. (In the protected radio con-figuration, the Service Channel connectors on the radios are non-func-tional.) For detailed pin information, see “Service Channel—Rear Panel” on Page 131.
108 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C11.5 Inter-Unit Cabling for Protected StationsThe required cabling between the two radios and the Protected Switch Chassis is dependent on the data interface, unit type (subrate versus full-rate), and transmit and receive antenna configuration.The cabling for a pair of standard radios with internal duplexers is shown in Figure 23.Figure 23. Inter-unit Cabling—Protected Version with Internal Duplexers11.6 Configuration Commands for a Protected SystemNOTE: In a protected link configuration, ensure that the E1/T1 inter-face settings are identical for both radios at a each end of the link.Once the inner-chassis cabling is in place and the units are powered up, several parameters are required to place the LEDR radio into proper operation as a member of a protected system.The tasks involved are reviewing and setting up of the following param-eters:DO NOT USE INPROTECTED CONFIG.TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1ProtectedTXExternal Data InterfaceEIA-530-AEthernetNMSServiceChannel Alarm I/O DC Power InputEIA-530-AEthernetNMSData InterfaceServiceChannel Alarm I/O DC Power InputTOSTATIONANTENNA1234TOMUX OR OTHERE1 EQUIPMENTTO ETHERNET HUBTO EIA-530DATA EQUIPMENT(SUBRATE MODELS)SERVICE CHANNEL(SERVES BOTH RADIOS)RXCOAXIAL CABLES (4)P/N 19-1323A02 CABLE 1AP/N 03-3837A01TXExternalRXG.703/Expansion DataG.703/Expansion DataRADIO ARADIO BPROTECTED SWITCHCABLE 2BP/N 03-3828A01(SUBRATE MODELS)CABLE 1BP/N 03-3837A01DO NOT USE INPROTECTED CONFIG.CABLE 2AP/N 03-3828A01(SUBRATE MODELS)
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 109•Radio Operation•General•Redundant Specific•Data Interface•Subrate—Fractional-T1•Fullrate—E1/T1Redundant Specific ParametersThere are several parameters that must be set to enable proper operation of a protected station. These are all covered under the rdnt command found on Page 74.Sample Redundant Configuration SessionThe following is a example of a session used to configure a LEDR radio to serve in a protected system. This sequence will need to be repeated for each radio in the protected pair.1. Configure the protected mode to hot-standby:LEDR> rdnt mode 1rdnt {mode}: 1+1 Hot StandbyLEDR>2. Configure the IP address of each radio:LEDR> ip address 192.168.1.1ip {netmask}: (255.255.0.0)ip {gateway}: (0.0.0.0)ip {port}: (ETH)ip {address}: 192.168.1.1ip {netmask}: 255.255.0.0ip {gateway}: 0.0.0.0ip {port}: ETHip: A reboot is strongly recommended. Do you wish to reboot? (y/n) >yLEDR>3. Configure the sibling IP address of each radio:LEDR> rdnt ip 192.168.1.2redundant {ip}: 192.168.1.2LEDR>4. Configure the hitless switching. (Note that the default is on.):LEDR> rdnt hitless onrdnt {hitless}: onLEDR>5. Configure the temperature (°C) threshold:LEDR> rdnt temp 100rdnt {temp}: 100LEDR>
110 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CTransmit Clock Selection (Subrate Models Only)The transmit clock selection must be addressed for every radio in a sub-rate radio system installation. The single most important consideration is that there be only one master clock in a subrate radio network. The master clock can originate from the radio or from the Customer Pre-mises Equipment (CPE). The radio is capable of several different clocking modes. Refer to Figure 24 on Page 111 for typical system clocking methods.Refer to the Clock Mode screen description on Page 35 for setting the radio transmit clocking from the front panel. Refer to the clkmode description on Page 56 for setting the radio transmit clocking mode from the CONSOLE Port.NOTE: When customer premises equipment (CPE) is operated inlooped clock mode, it is recommended that the radio not be setto line clock mode. To do so may cause the transmittingradio’s PLL to be pulled out-of-lock, especially when oper-ating at 4E1 data rates.
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 111Invisible place holderFigure 24. Typical Repeater Clocking Arrangement(no multiplexer at repeater site)CPEREPEATER NULL-MODEMDATA INTERCONNECT CABLEETHERNET CROSS-CABLEREPEATER SITECPESITE ASITE BSITE CLEDR RadioClock Source: RemoteLEDR Radio ClockSource: Line 1, 2, 3, 4LEDR RadioClock Source: RemoteNetwork orInternal ClockLooped ClockModeScenario 1:LEDR Radio ClockSource: InternalScenario 2:Scenario 1:Scenario 2:Looped ClockModeLEDR Radio ClockSource: Line 1, 2, 3, 4
112 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C12.0 SPACE DIVERSITY OPERATION12.1 IntroductionSpace diversity operation is an effective mechanism of increasing a radio link’s resilience to transmission impairments such as multipath fading or frequency selective fading. In difficult transmission environ-ments such as over highly reflective and moving water paths, or in arid environments where atmospheric ducting occurs, space diversity is the most effective way of maintaining a continuous radio link. In a space diversity link, two radio receivers are operated in parallel, from two separate antennas mounted several wavelengths apart verti-cally on the antenna tower. The separation of antennas is such that when one antenna experiences fading due to multi-path interference, the other antenna, being several wavelengths away, is not likely to experience the same fade. Thus, one receive path may experience uncorrectable errors, while the other path will be error free. Similar to the protected operation, the receive modem switch will determine which buffered data path is operating with the highest integrity, and select that path without inducing any additional bit errors into the link.Space diversity is especially effective in changeable multi-path environ-ments such as over tidal water paths. Since water is highly reflective, there will be continual “constructive” and “destructive” interference at each single antenna over the course of the day as the water rises and falls and the reflected water path interferes with the line-of-sight path. By correct vertical positioning of the antennas, these effects can be negated, allowing one antenna to see a good signal while the other is experi-encing fading, and the modem switching accordingly to allow the link to operate error- free.The space diversity LEDR radio is available only in a hot standby con-figuration.12.2 User Interface & ControlProtected operation is configured using the Redundant screen (Page 41) on either radio front panel, or with the rdnt command from a NMS ter-minal (see Page 74).12.3 Transmit Clock SelectionThere is no difference between a space diversity system and redundant radio arrangements with respect to transmit clock selection. Fullrate radios require no user intervention for clocking. Users of subrate sys-tems should set the radio clocks as described for subrate systems. See “Transmit Clock Selection” on Page 112 for further information.
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 11312.4 Inter-Unit Cabling for Space Diversity StationsThe RF cabling for space diversity stations depends on the location of the duplexers. The block diagram in Figure 25 shows the RF connec-tions in a typical system with two external duplexers.Invisible place holderFigure 25. Block Diagram of a Space Diversity Stationwith External DuplexersThe inter-unit cabling for a space diversity system with external duplexers is shown in Figure 26.Figure 26. Inter-unit Cabling—Space Diversitywith External DuplexersTXRXANTRXTX DUPLEXER ATXRXANTRXLEDRUNIT B DUPLEXER BLEDRUNIT ADO NOT USE INPROTECTED CONFIG.TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1ProtectedTXExternal Data InterfaceEIA-530-AEthernetNMSServiceChannel Alarm I/O DC Power InputEIA-530-AEthernetNMSData InterfaceServiceChannel Alarm I/O DC Power Input1234TOMUX OR OTHERE1 EQUIPMENTTO ETHERNET HUBTO EIA-530DATA EQUIPMENT(SUBRATE MODELS)SERVICE CHANNEL(SERVES BOTH RADIOS)RXCOAXIAL CABLES (2)P/N 19-1323A02 CABLE 1AP/N 03-3837A01TXExternalRXG.703/Expansion DataG.703/Expansion DataRADIO ARADIO BPROTECTED SWITCHCABLE 2BP/N 03-3828A01(SUBRATE MODELS)CABLE 1BP/N 03-3837A01DO NOT USE INPROTECTED CONFIG.CABLE 2AP/N 03-3828A01(SUBRATE MODELS)TOANTENNASYSTEMTO RX PORT OFDUPLEXER ATO RX PORT OFDUPLEXER BTO TX PORT OFDUPLEXER A
114 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CThe inter-unit cabling for a space diversity system with internal duplexers is shown in Figure 27. Figure 27. Inter-unit Cabling—Space Diversitywith Internal DuplexersDO NOT USE INPROTECTED CONFIG.TxBAntenna TxARxBRxA 530 (A&B) EIA-530-A Service ChannelEthernetE1ProtectedTXExternal Data InterfaceEIA-530-AEthernetNMSServiceChannel Alarm I/O DC Power InputEIA-530-AEthernetNMSData InterfaceServiceChannel Alarm I/O DC Power Input1234TOMUX OR OTHERE1 EQUIPMENTTO ETHERNET HUBTO EIA-530DATA EQUIPMENT(SUBRATE MODELS)SERVICE CHANNEL(SERVES BOTH RADIOS)RXCOAXIAL CABLES (4)P/N 19-1323A02 CABLE 1AP/N 03-3837A01TXExternalRXG.703/Expansion DataG.703/Expansion DataRADIO ARADIO BPROTECTED SWITCHCABLE 2BP/N 03-3828A01(SUBRATE MODELS)CABLE 1BP/N 03-3837A01DO NOT USE INPROTECTED CONFIG.CABLE 2AP/N 03-3828A01(SUBRATE MODELS)TO RX ANTENNASYSTEMTO TX/RX ANTENNASYSTEM A
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 11513.0 SPARE PARTS, UNITS AND ACCESSORIES13.1 SparesSpare assemblies and units used for repair of LEDR radios are listed in Table 28. Field servicing, or replacement of PC boards and assemblies, should only be performed by qualified service personnel.When ordering parts from the factory, always give the complete model number of the radio as found on the serial number label on the chassis. Contact information can be found on Page 140 of this guide.Table 28. Field Replaceable Units for LEDR RadiosItem Model Part NumberTransceiver’s SRAM Power Back-up Battery All Models 27-3109A01Protected Switch Chassis (Complete unit) LEDR 400F 03-3873A01LEDR 900F 03-3873A02LEDR 1400F 03-3873A03Duplexer (If equipped) All Models Frequency dependent; Contact factory.FT1 Data Interface PCB LEDR 900S 03-3846A01E1/FE1 Data Interface PCB LEDR 400FLEDR 400SLEDR 900FLEDR 900SLEDR 1400FLEDR 1400S03-3846A02Subrate Data Interface PCB LEDR PSC 03-2824A01Fullrate Data Interface PCB LEDR PSC 03-3539A01
116 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C13.2 AccessoriesTable 28 lists accessories available from the factory as a convenience to our customers. Factory contact information can be found on Page 140 of this guide. Table 29. Accessory Items for LEDR Radios Item Description Part NumberV.35 Interface Cable 6 ft (1.8 m) cable adapter used to convert subrate LEDR radio EIA-530 data interface to V.35 male data interface.03-2174A01G.703 Balun Miniature G.703 balun used to convert a fullrate LEDR radio’s 120 Ω balanced data interface to two 75 Ω BNC coaxial data interfaces. One balun required per E1 port.01-3494A01EIA-530 Null-MODEM Crossover Cable 6 ft (1.8 m) cable adapter to connect subrate interfaces in a repeater configuration.97-2841L06SNMPc™ Network Management Manager SNMP Management Software to access the LEDR embedded SNMP agent, allowing management of the LEDR radio network and any interconnected SNMP enabled peripherals. For Windows 95 O/S03-3530A01SNMPc™ Network Management Manager SNMP Management Software to access the LEDR embedded SNMP agent, allowing management of the LEDR radio network and any interconnected SNMP enabled peripherals. For Windows 98 or NT O/S.03-3530A02Orderwire Handset Voice handset with 4-wire cord (RJ-11 modular plug). 12-1307A03Orderwire Handset Kit Voice handset with 4-wire cord (RJ-11 modular plug), hanger and mounting bracket.02-1207A01AC Power Adapter External AC power supply provides 24 Vdc to LEDR radio. Input: 110 Vac to 240 Vac, 50 to 60 Hz03-3862A01
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 11714.0 FRACTIONAL-T1 INTERFACE CARD 03-3846A01FRACTIONAL-E1 INTERFACE CARD 03-3846A0214.1 IntroductionThe Fractional-T1 (FT1) and Fractional-E1 (FE1) Interface cards are optional assemblies which provide additional connectivity within a LEDR network for all subrate (S) models. The installation of the FT1/FE1 Interface card inside the radio allows the standard EIA-530 customer data interface to be bypassed and the radio data lines to be con-nected directly to a G.703 T1 or E1 interface.With the optional FT1/FE1 Interface, users are able to place a LEDR link from a network service access point to a remote site, where an installation supports multiple communications devices. Direct interface to customer equipment, such as channel banks, is possible without the use of expensive protocol converters.14.2 Fractional-T1/E1 PerformanceThe FT1 and FE1 Interface allows the LEDR radio to be connected directly with a G.703 T1 or E1 interface. The line rate of the interface operates at the T1 rate of 1.544 Mbps, or E1 rate of 2.048 Mbps. Twelve user selectable DS0 timeslots are transmitted over the air in either case. The FT1 interface is G.703 at 100 Ω line impedance. The FE1 interface is G.703 at 120 Ω line impedance. Physical connection is via an RJ-45 jack on the rear panel.14.3 Configurable ParametersThe following performance specifications of the T1 fractional interface are adjustable by the user. All of these parameters are manageable locally, or over the air via SNMP network management. (Refer to the SNMP Handbook, P/N 05-3532A01 for more information.)Timeslots and FramingTwelve DS0 timeslots are permitted. In FT1, the timeslot selection is arbitrary. In FE1, timeslot 0 is always sent and the remaining timeslots are arbitrary with the exception of timeslot 16. (Timeslot 16 must be sent when any CAS frame structures are selected.) The selection of timeslots can be different at each end of the link, provided their number is equal. The timeslots may not be reordered.
118 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CAlarm signals RAI and AIS are generated as appropriate. The user may optionally have these signals forwarded over the RF link.The frame formats available for Fractional-T1 operation are as follows:•FT only•ESF without CRC checking and generation•SF (D4)•SF with JYEL indication•ESF with CRC checking and generationThe frame formats available for Fractional-E1 operation are as follows: •FAS only•FAS with BSLIP•FAS with CRC•FAS with CRC and BSLIP•FAS and CAS•FAS with CAS and BSLIP•FAS with CAS and CRC•FAS with CAS•CRC and BSLIP.The re-framing criteria may be adjusted to the following settings: 2 out of 4 Fbit errors, 2 out of 5 Fbit errors, 2 out of 6 Fbit errors. For FE1, the reframing criteria is selectable between consecutive FAS errors or CRC errors.Line CodesThe following standard T1 line codes are supported: B8ZS, AMI, and per-channel B7ZS.The following standard E1 line codes are supported: HDB3 and AMI.DiagnosticsThe T1 line at each end of the link may be tested using a variety of bit patterns. In normal operation, statistics are stored for any errors occur-ring at the line interface, such as framing errors, bipolar violations, and CRC errors.Data may be looped back at the local port, through the T1 option only, and at the remote unit. Further, the unit will respond to in-band (SF) and data link (ESF) loopback codes at the local port.When in ESF framing mode, the option can automatically generate per-formance report messages.
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 119The following alarms may be monitored & logged. They may also be associated with a user-selectable indication (alarm contact or front panel LED): Remote Loopback, Lost Frame, Lost Signal, Lost Analog Signal, AIS, RAI (RYEL), MultiFrame RAI, Severely Errored Frame, Frame Re-Align, MultiFrame AIS, Far End Block Error, Line Code Error, CRC Errors and Frame Bit Error.ClockingThe clock source is configurable for network, loopback, and internal timing, with secondary selections available should the primary source become faulty. Refer to the discussion of the clkmode command (Page 54) for more information14.4 Field Installation of the FT1 Interface BoardAn “S” Series LEDR radio can be fitted with a Fractional-T1 (FT1) or Fractional-E1 (FE1)Interface Board (Figure 28). The addition of an FT1/FE1 board enables the radio to operate with a G.703 interface at speeds up to 768 kbps.To add the FT1/FE1 Interface Board to an existing LEDR radio trans-ceiver, follow these steps:1. Remove the top cover of the radio (4 Phillips screws).2. Identify the installation area for the Interface Board (See Figure 29). Remove the three Phillips screws on the main PC board which cor-respond to the mounting holes on the Interface Board. 3. Install the threaded standoff spacers (furnished with the option board) onto the main PC board in the holes formerly occupied by the screws. (Note: Washers must not be used between the standoff spac-ers and either of the PC boards.)4. Locate connectors J912 and J913 (See Figure 29). These connectors mate with the plugs on the bottom of the Interface board.5. Carefully set the optional board into place, making sure to align the mounting holes with the threaded standoffs on the main PCB. (The Interface Board’s rear panel connector should align with the rectan-gular cutout at the radio’s rear panel, and the rear edge of the option board should be parallel to the main PC board.)6. Look under the right edge of the Interface board to ensure that J912 is aligned with the mating connector on the option board. With the board properly aligned, push down firmly in the area directly above J913 and then over J912 at the edge. A distinct “locking” action will be felt as the connectors engage.
120 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C7. Install the Phillips mounting screws with lockwashers on the top of the FT1 board. For protected versions only: Install the plastic clip, if supplied, at the right rear corner of the Interface board. It slips over the edge of the main PC board and the option board. Gently tighten the hex screw to secure the clamp.)The Interface board must be properly seated onto the LEDR radio’s motherboard before powering up the radio chassis. Failure to properly install the board could result in permanent damage to the motherboard and the optional PCB.8. Re-install the radio’s top cover. This completes the Interface Board installation.Invisible place holderFigure 28. FT1/FE1 Interface Board—Optional Assembly(Part No. 03-3846Axx)CAUTIONPOSSIBLEEQUIPMENTDAMAGEUser InterfacePorts Mates with J912 onRadio PC BoardMates with J913 onRadio PC Board
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 121Invisible place holderFigure 29. View of Radio PC BoardShowing Installation Details for FT1/FE1 Interface BoardJ912J913REAR PANEL OF LEDR RADIOInstallation Areafor Interface BoardPC Board Clamp(Some Versions)
122 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C15.0 INCREASE BANDWIDTH BY CHANGING TRANSMITTER AND RECEIVER FILTERS15.1 IntroductionIt is possible for qualified service personnel to upgrade LEDR Series radios in the field to increase the radios RF bandwidth. Listed in Table 30 are five upgrade kits. Each kit consists of three RF filters; one is used in the transmitter section and two are used in the receiver section. In addition, there is a unique software key that will allow the data circuitry to handle the higher data bandwidth. This key is based on the radio’s serial number and can only be used with that radio.Each kit consists of a set of 3 filters (transmitter 1; receiver 2), software activation key and instructions for converting radio’s occupied band-width. The radio serial number must be provided to the factory for issue of authorization key.To realize the full benefit of the increased RF bandwidth, it may be nec-essary to upgrade the radio’s data interface. Table 1 on Page 1 provides a simplified listing of radio bandwidth and compatible data interfaces.15.2 Filter Removal and ReplacementThese instructions describe the removal and replacement of filter mod-ules inside a LEDR Transceiver, as well as the software commands nec-essary to authorize the new bandwidth.CAUTION: This upgrade involves the removal of small, delicate parts. It must be performed by experienced personnel only, using proper tools and equipment to preserve the factory warranty. Precautions must be taken to prevent damage to components due to static discharge and other risks.1. Remove the radio from service and disconnect all cabling from the rear panel.Table 30. Hardware Upgrade Kits for Increased RF BandwidthFor Subrate Radios For Fullrate Radio25 kHz to 50 kHz 500 kHz to 1.0 MHz25 kHz to 100 kHz 500 kHz to 2.0 MHz25 kHz to 200 kHz 1.0 MHz to 2.0 MHz50 kHz to 100 kHz50 kHz to 200 kHz100 kHz to 200 kHz
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 1232. Remove the top cover of the radio (four Phillips head screws).3. Remove the Transmitter and Receiver section’s RF shields (Figure 30). It will be necessary to unplug the ribbon cables that cross over the shields—record their locations as you remove them.4. Locate and remove Filter FL700 from the transmitter section. In its place, install the replacement filter furnished with the upgrade kit. Ensure that the new filter is installed in the same orientation as the original unit.Invisible place holderFigure 30. Location of Bandwidth Filters FL600, FL601 and FL7005. Locate and remove Filters FL600 and FL601 from the Receiver module. In their place, install the replacement filters furnished with the upgrade kit. Ensure that the new filters are installed in the same orientation as the original units.6. This completes the required hardware changes. Fasten the top cover and re-connect all cables to the rear panel.7. Power up the radio and proceed to “Software Commands” below.LEDR RADIO PC BOARDFL700FL601FL600Transmitter SectionReceiver Section
124 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C15.3 Software CommandsTo activate the new filter bandwidth, it is necessary to enter an authori-zation key provided by Microwave Data Systems. This key is based upon the radio serial number and will authorize the new bandwidth of the radio. Contact the factory if you do not already have an authorization number.1. Initiate a NMS terminal session with the LEDR radio. (Refer to Page 25 for login details.)2. At the LEDR> prompt, type: auth add <authorization number>, where <authorization number> is the number provided to you by the factory. Press ENTER.3. This completes the required software changes. If desired, the auth show command may be entered to display all of the current options for the LEDR radio.4. Check for alarms on the front panel LED display. If no alarms are present, the basic functionality of the radio can be confirmed. If an alarm is present, double check all cable connections and radio set-tings.16.0 BENCH TESTING OF RADIOSIn some cases, it may be necessary to test the operation of the equipment in a bench setting. Figure 31 shows a simple arrangement for bench testing using RF attenuators between the two units under test. For weak signal tests (weaker than –80 dBm), additional physical sepa-ration between Radio 1 and Radio 2 may be required to prevent uninten-tional coupling between the radios. On protected radio configurations, a weak received signal will cause the radio transceivers to switch. Figure 31. Back-to-Back Link TestANTConnector ANTConnectorPOWER ATTENUATOR • 30 dB • 1W RatingPOWER ATTENUATOR • 30 dB • 1W RatingSWITCHED OR VARIABLEATTENUATOR • 0–110 dB (1 dB Steps) JFW 50DR-001 or Equivalent • Required only for receiver sensitivity test.LOW LOSS COAXIAL LINESDIGITALEQUIPMENTOR BERTESTER RADIO#1DATA PORTTOTAL ATTENUATIONFixed: 80 dB Minimum for Basic ChecksAdjustable: For Sensitivity Tests (100–140 dB Required)DIGITALEQUIPMENTOR BERTESTERDATA PORTRADIO#2
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 125You can perform an over-the-air BER test on the bench or in the field. In this case, attach a separate piece of BER test equipment and feed it into one or more of the T1/E1 ports. At the other end of the link, you use another BER test box, or attach a loopback plug to the CPE data I/O port. This tests the quality of the radio link itself with regard to the user payload data. Such a bench, or over-the-air, test does not use the LEDR bert command.NOTE: It is important to avoid over-driving the receiver as it can be damaged by strong signals. Signals stronger than -20 dBm should be avoided to protect the receiver.NOTE: User BERT test equipment connected to a LEDR T1 datainterface my yield different BERT results than the radio’s bercommand. This is likely when less than the channel's capacityis utilized by the timeslot command configuration.17.0 TECHNICAL REFERENCE17.1 Specifications—Models: LEDR 400S, LEDR 900S & LEDR 1400SGeneral Frequency Ranges: 330–512 MHz (LEDR 400S)800–960 MHz (LEDR 900S)1350–1535 MHz (LEDR 1400S)RF Occupied Bandwidth: 25, 50, 100 and 200 kHzUser Data Rates: 64, 128, 256, 384, 512 & 768 kbpsWith optional FT1 Interface Board: n x 64 kbps (Where n = 12)Permitted Data Throughput: Channel Size Data Rate25 kHz 64 kbps50 kHz 64 kbps to 128 kbps100 kHz 64 kbps to 256 kbps200 kHz 64 kbps to 768 kbpsModulation Type: 32 QAM, 16 QAM, QPSKForward Error Correction (FEC): Reed-SolomonAcquisition Time— Typical: From power up, 10 secondsVoltage Range: 24 Vdc or 48 Vdc (±20%)Power Consumption: Less than 60 watts (non-protected configuration)Temperature Range: – 5° to 50° CHumidity: ≤ 90% non-condensing @ 40° CSize: 1 RU; 19 Inch rack mount compatible45 mm (1.75 in) high, 1RU426 mm (16.75 in) wide (excluding rack brackets)305 mm (12 in) deep
126 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CTransmitterTransmit Power: +30 dBm (1 watt) at antenna portOutput Control Range: 0 dB to –10 dBFrequency Stability: 1.5 ppmSpurious Outputs: < –60 dBc 400S< –60 dBc 900S< –60 dBm 1400SReceiverSensitivity (for 10-6 BER): Bandwidth Data Rate Sensitivity25 kHz 64 kbps –101 dBm50 kHz 128 kbps –98 dBm100 kHz 256 kbps –95 dBm200 kHz 768 kbps –92 dBmResidual BER: < 1 x 10-10Dynamic Range: > 65 dBInterfacesData: EIA-530,G.703 100 Ω, balanced (RJ-45) with optional FT1 Interface BoardOrderwire: Voice handset interface, DTMF capableService Channel: RS-232 @ 9600 bpsEthernet: 10 Base-TConsole Port: RS-232, 9600 bps to 38.4 kbpsAlarms: 4 programmable outputs; 4 inputsAntenna: 50 Ω ImpedanceNetwork Management SystemAccessibility: Via built-in HTTP server or command line interfaceSNMP Management (Optional): Using MIB II and custom enterprise MIBDiagnostic FunctionsVia Front Panel LEDs: Power, Active, General Alarm, Rx Alarm, Tx Alarm & I/O AlarmVia Front Panel LCD Display : Measurements of RSSI, RF Power, Signal-to-Noise ratio, BERData Loopback: Local and RemoteAgency ApprovalsLEDR 400S EMC: ETS 300 385LEDR 900S Transmission: FCC Part 101, RS-119EMC: FCC Part 15
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 127LEDR 1400S Transmission: ETS 300 630, MPT 1717Environmental: ETS 300 019, Class 3.2EMC: ETS 300 385Safety: CE Mark17.2 Specifications—Models: LEDR 400F, 900F, 1400FGeneral Frequency Ranges: 330–512 MHz (LEDR 400F)800–960 MHz (LEDR 900F)1350–1535 MHz (LEDR 1400F)RF Occupied Bandwidth: 500 kHz, 1 MHz & 2 MHzUser Data Rates: 1 x E1 (2.048 Mbps)2 x E1 (4.096 Mbps)4 x E1 (8.192 Mbps)Permitted Data Throughput: Channel Size Data Rate500 kHz 1 x E1 (2.048 Mbps)1 MHz 2 x E1 (4.096 Mbps)2 MHz 4 x E1 (8.192 Mbps)Modulation Type: 32 QAM, 16 QAM, QPSKForward Error Correction (FEC): Reed-SolomonAcquisition Time (Typical): From power up, 10 secondsVoltage Range: 24 Vdc or 48 Vdc (±20%)Power Consumption: Less than 60 watts (non-protected configuration)Temperature Range: –5° to 50° CHumidity: ≤ 90% non-condensing @ 40° CSize: 1RU, 19 Inch rack mount compatible45 mm (1.75 in) high, 1RU426 mm (16.75 in) wide (excluding rack brackets)305 mm (12 in) deepTransmitterTransmit Power: +30 dBm (1 watt) at antenna portOutput Control Range: 0 dB to –10 dBFrequency Stability: 1.5 ppmSpurious Outputs: < –60 dBc (400F)< –60 dBm (1400F)ReceiverSensitivity (for 10-6 BER): Bandwidth Data Rate Sensitivity500 kHz 1 x E1 –90 dBm1 MHz 2 x E1 –87 dBm2 MHz 4 x E1 –84 dBmResidual BER: < 10–10Dynamic Range: > 65 dB
128 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CInterfacesData: G.703 120 Ω, balanced (4 x RJ-45)Orderwire: Voice handset interface, DTMF capableService Channel: RS-232 @ 9600 bpsEthernet: 10 Base-TConsole Port: RS-232, 9600 bps to 38.4 kbpsAlarms: 4 programmable outputs, 4 inputsAntenna: 50Ω ImpedanceNetwork Management SystemAccessibility: Via built-in HTTP server or command line interfaceSNMP Management (Optional): Using MIB II and custom enterprise MIBDiagnostic FunctionsVia Front Panel LEDs: Power, Active, General Alarm, Rx Alarm, Tx Alarm, I/O AlarmVia Front Panel LCD Display : Measurements of RSSI, RF Power, Signal-to-Noise ratio, BERData Loopback: Local and RemoteAgency ApprovalsLEDR 1400F Transmission: ETS 300 630, MPT 1717Environmental: ETS 300 019, Class 3.2EMC: ETS 300 385Safety: CE Mark17.3 Specifications—Protected Switch ChassisTransmitter Coupling Loss: 2 dB (Typical)Receive Coupling Losses: 4 dB with Symmetrical Splitter (Typical)2 dB/10 dB with Asymmetrical Splitter (Typical)Power Consumption: Less than 135 watts (Two LEDR radios and Protected Switch Chassis)17.4 Optional Equipment (Consult factory for details)• Space Diversity• Hot-standby Protected• Warm-standby Protected• Bandwidth Upgrade Kits
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 12917.5 Accessories• 120/240 Vac 50/60 Hz Power Supply (24 Vdc Output) • Orderwire Handset• Other items listed in Table 29 on Page 116NOTE: The factory reserves the right to make changes to this specification with-out advance notice or obligation to any person.17.6 I/O Connector Pinout InformationOrderwire—Front Panel Invisible place holderFigure 32. Orderwire RJ-11 ConnectorCONSOLE Port—Front Panel Invisible place holderFigure 33. CONSOLE Port DB-9 Female Pinout1 2 3 4 5 6RJ-45pPin Signal Direction1 + 12 Vdc Output2 Ground —3 Ear –Output4 Ear + Output5 Mouth Input6 Ground —RJ-11678912345NCRXD (DATA OUT)TXD (DATA IN)NCNCNCNCNCGROUNDDCE
130 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CEthernet—Rear Panel Invisible place holderFigure 34. Ethernet Connector EIA-530-A Data—Rear Panel Invisible place holderFigure 35. EIA-530 Connector Pinout (DB-25)G.703 Data Connectors (4)—Rear PanelInvisible place holderFigure 36. G.703 Data Connector Pinout (RJ-45)1 2 3 4 5 6 7 8RJ-4510Base-TPin Signal Direction1 Ethernet Transmit High Output2 Ethernet Transmit Low Output3 Ethernet Receive High Input4 No Connection —5 No Connection —6 Ethernet Receive Low Input7 No Connection —8 No Connection —Clear to Send (B)Transmit Signal Element Timing (B)Ext. Transmit Signal Element Timing (B)13121110987654321Received Line Signal Detector (B)Receiver Signal Element Timing (B)Received Line Signal Detector (A)Signal GroundDCE Ready (A)Clear to Send (A)Request to Send (A)Received Data (A)Transmitted Data (A)ShieldReturnReturnReturnReturnReturnDCECommonDCEDCEDTEDCEDTECommon252423222120191817161514Test ModeExt. Transmit Signal Element Timing (A)CommonRemote LoopbackRequest to Send (B)Local LoopbackReceiver Signal Element Timing (A)Receiver Data (B)Transmit Signal Element Timing (A)Transmitted Data (B)DCEDTEReturnDTEReturnDTEDCEReturnDCEReturnSourceSignalDesignation PinNo. PinNo. SignalDesignation SourcePin Signal Direction1 Differential digital output signal, ring Output2 Differential digital output signal, tip Output3 Ground(Early models: No Connection) —4 Differential digital input signal, ring Input5 Differential digital input signal, tip Input6 Early models: No ConnectionLate models: Ground —7 No Connection —8 No Connection —1 2 3 4 5 6 7 8RJ-45
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 131Service Channel—Rear Panel Invisible place holderFigure 37. Service Channel Connector Pinout (DB-9 Male)Alarm—Rear Panel Invisible place holderInvisible place holderFigure 38. Alarm Connector DB-9 Female Pinout(See See “Alarm I/O” on Page 20 for parameters.)678912345DCD (IN)RXD (DATA IN)TXD (DATA OUT)DTR (OUT)DSR (IN)RTS (OUT)CTS (IN)NCGROUNDDTE678912345ALARM IN 1ALARM IN 2ALARM IN 3ALARM IN 4ALARM OUT 1ALARM OUT 2ALARM OUT 3ALARM OUT 4GROUND
132 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C17.7 Watts-dBm-Volts ConversionTable 31 is provided as a convenience for determining the equivalent voltage or wattage of an RF power expressed in dBm.Invisible place holder18.0 RADIO EVENT CODESTable 32 lists the event codes that may be encountered during operation of the radio. These codes may be read from a terminal using the events pending command. (See Page 57 for a full description of the events com-mand.)Table 31. dBm-Volts-Watts Conversion ChartdBm V Po+53 100.0 200W+50 70.7 100W+49 64.0 80W+48 58.0 64W+47 50.0 50W+46 44.5 40W+45 40.0 32W+44 32.5 25W+43 32.0 20W+42 28.0 16W+41 26.2 12.5W+40 22.5 10W+39 20.0 8W+38 18.0 6.4W+37 16.0 5W+36 14.1 4W+35 12.5 3.2W+34 11.5 2.5W+33 10.0 2W+32 9.0 1.6W+31 8.0 1.25W+30 7.10 1.0W+29 6.40 800mW+28 5.80 640mW+27 5.00 500mW+26 4.45 400mW+25 4.00 320mW+24 3.55 250mW+23 3.20 200mW+22 2.80 160mW+21 2.52 125mW+20 2.25 100mW+19 2.00 80mW+18 1.80 64mW+17 1.60 50mW+16 1.41 40mW+15 1.25 32mW+14 1.15 25mW+13 1.00 20mW+12 .90 16mW+11 .80 12.5mW+10 .71 10mW+9 .64 8mW+8 .58 6.4mW+7 .500 5mW+6 .445 4mW+5 .400 3.2mW+4 .355 2.5mW+3 .320 2.0mW+2 .280 1.6mW+1 .252 1.25mWdBm V Po0 .225 1.0mW-1 .200 .80mW-2 .180 .64mW-3 .160 .50mW-4 .141 .40mW-5 .125 .32mW-6 .115 .25mW-7 .100 .20mW-8 .090 .16mW-9 .080 .125mW-10 .071 .10mW-11 .064-12 .058-13 .050-14 .045-15 .040-16 .0355dBm mV Po-17 31.5-18 28.5-19 25.1-20 22.5 .01mW-21 20.0-22 17.9-23 15.9-24 14.1-25 12.8-26 11.5-27 10.0-28 8.9-29 8.0-30 7.1 .001mW-31 6.25-32 5.8-33 5.0-34 4.5-35 4.0-36 3.5-37 3.2-38 2.85-39 2.5-40 2.25 .1µW-41 2.0-42 1.8-43 1.6-44 1.4-45 1.25-46 1.18-47 1.00-48 0.90dBm mV Po-49 0.80-50 0.71 .01µW-51 0.64-52 0.57-53 0.50-54 0.45-55 0.40-56 0.351-57 0.32-58 0.286-59 0.251-60 0.225 .001µW-61 0.200-62 0.180-63 0.160-64 0.141dBm µV Po-65 128-66 115-67 100-68 90-69 80-70 71 .1nW-71 65-72 58-73 50-74 45-75 40-76 35-77 32-78 29-79 25-80 22.5 .01nW-81 20.0-82 18.0-83 16.0-84 11.1-85 12.9-86 11.5-87 10.0-88 9.0-89 8.0-90 7.1 .001nW-91 6.1-92 5.75-93 5.0-94 4.5-95 4.0-96 3.51-97 3.2dBm µV Po-98 2.9-99 2.51-100 2.25 .1pW-101 2.0-102 1.8-103 1.6-104 1.41-105 1.27-106 1.18dBm nV Po-107 1000-108 900-109 800-110 710 .01pW-111 640-112 580-113 500-114 450-115 400-116 355-117 325-118 285-119 251-120 225 .001pW-121 200-122 180-123 160-124 141-125 128-126 117-127 100-128 90-129 80 .1ƒW-130 71-131 61-132 58-133 50-134 45-135 40-136 35-137 33-138 29-139 25-140 23 .01ƒW
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 133NOTE: The event codes listed here are available on radios equippedwith the optional FT1 Interface Board. Standard “S” Seriesradios will display fewer codes.Table 32. Event Codes ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL0 EXT_ALARM_IN1 External Alarm Input #1 ALARM CRITICAL1 EXT_ALARM_IN2 External Alarm Input #2 ALARM CRITICAL2 EXT_ALARM_IN3 External Alarm Input #3 ALARM CRITICAL3 EXT_ALARM_IN4 External Alarm Input #4 ALARM CRITICAL4 MODULATOR_EV Communication failure with modulator ALARM CRITICAL5 DEMODULATOR_EV Communication failure with demodulator ALARM CRITICAL6 MOD_SELFTEST Modulator selftest failed NONE CRITICAL7 DEMOD_SELFTEST Demodulator selftest failed NONE INFORM8 PERM_REGN_CHECKSUM Permanent region checksum failed NONE INFORM9 APP1_REGN_CHECKSUM Application #1 checksum failed NONE INFORM10 APP2_REGN_CHECKSUM Application #2 checksum failed NONE INFORM11 BOOT_REGN_CHECKSUM Boot loader checksum failed NONE INFORM12 CONF1_REGN_CHECKSUM Configuration Data region #1 checksum failed NONE INFORM13 CONF2_REGN_CHECKSUM Configuration Data region #2 checksum failed NONE INFORM14 RTC_TEST Real-time clock error NONE INFORM15 BBRAM_TEST NV-RAM test failed NONE INFORM16 BATTERY_LOW NV-RAM battery is low ALARM MAJOR17 TX_SYNTH_LOCK Transmit Synthesizer out-of-lock TXALARM CRITICAL18 RX_SYNTH_LOCK Receive Synthesizer out-of-lock RXALARM CRITICAL19 DIG_POWER_REF Digital Power Reference is out of specified range ALARM CRITICAL20 TEMPERATURE Temperature sensor reads over 80 degrees CelsiusALARM CRITICAL21 TX_POWER_LOOP Transmit Power Loop is out-of-lock TXALARM MAJOR22 DEMOD_SNR_LOW Demodulator Signal-to-Noise ratio is unacceptably lowNONE MINOR
134 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C23 DEMOD_AGC_RSSI Demodulator Automatic Gain Controlled RSSI too lowNONE MINOR24 DEMOD_FEC_RECOVER FEC circuitry has detected and corrected one or more errorsNONE MINOR25 DEMOD_FEC_UNRECOVER FEC circuitry has detected one or more uncorrectable errorsNONE MINOR26 DEMOD_MULTIPATH Excessive multipath distortion detected NONE MINOR27 DEMOD_ACQUISITION Demodulator lost sync. lock on received signal RXALARM CRITICAL28 TX_TO_REMOTE_RX Problem with link between the local transmitter & remote RxALARM CRITICAL29 REDUNDANT_ALARM Problem with redundant unit ALARM CRITICAL30 WDOG_TIME_OUT Processor watchdog has expired and reset the processorALARM CRITICAL31 RX_OFF Radio is not receiving due to a weak signal or equipment failure RXALARM CRITICAL32 SOFTWARE_TX_OFF Software command has unkeyed the radio TXALARM CRITICAL33 RTC_NOT_SET The real time clock is not programmed NONE MINOR34 IO1_DIG_LOC_lOOPBACK The radio’s 530 or TELCO I/O port is in Digital local loopback modeNONE INFORM35 IO2_DIG_LOC_lOOPBACK The radio’s 2nd TELCO I/O port is in Digital local loopback modeNONE INFORM36 IO3_DIG_LOC_lOOPBACK The radio’s 3rd TELCO I/O port is in Digital local loopback modeNONE INFORM37 IO4_DIG_LOC_lOOPBACK The radio’s 4th TELCO I/O port is in Digital local loopback modeNONE INFORM38 RF_LOCAL_LOOPBACK The radio is in Local RF loopback test mode NONE INFORM39 IO1_DIG_REM_LOOPBACK The radio’s 530 or TELCO I/O port is in Digital Remote loopback modeNONE INFORM40 IO2_DIG_REM_LOOPBACK The radio’s 2nd TELCO I/O port is in Digital Remote loopback modeNONE INFORMTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 13541 IO3_DIG_REM_LOOPBACK The radio’s 3rd TELCO I/O port is in Digital Remote loopback modeNONE INFORM42 IO4_DIG_REM_LOOPBACK The radio’s 4th TELCO I/O port is in Digital Remote loopback modeNONE INFORM43 RAW_SERVICE_CHANNEL The Raw Service Channel data frame is exhibiting errorALARM MAJOR44 ATOD_REFERENCE A fault is detected with the Analog to Digital converter ALARM CRITICAL45 NEW_CONFIG_REV A new revision of configuration data structure has been detectedNONE INFORM46 FPGA_LOAD FPGA is not loaded correctly NONE INFORM47 DATE_TIME_CHANGE The date or time is been modified NONE INFORM48 HARDWARE_TX_OFF The transmitter key hardware is in an unkeyed state TXALARM CRITICAL49 INACTIVE_ON Current radio transceiver is in standby mode when in protected radio chassisALARM MAJOR50 NO_OPTION_UNIT No Option Card is detected NONE INFORM51 VOCODER_INIT_ERR The voice processor initialization failed ALARM MAJOR52 VOCODER_ERROR The voice processor is reporting a problem ALARM MAJOR53 POWER_ON_RESET This indicates PowerOn Reset Cycle NONE INFORM54 EXT_HARD_RESET This indicates last Power-Up Cycle was due to External Hard ResetNONE INFORM55 EXT_SOFT_RESET This indicates last Power-Up Cycle was due to External Soft ResetNONE INFORM56 INACT_CONFIG_SYNC Protected 1+1 mode Active to Inactive Configuration data sync. errorALARM CRITICAL57 NEW FIRMWARE LOADED New firmware has been downloaded from flash memory.NONE INFORM58 CONFIG_CHANGED The radio transceiver configuration has been modifiedNONE INFORMTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
136 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C59 SELFTEST_COMPLETE A self test has completed execution NONE INFORM60 PERFORM_DEGRADED A performance degradation threshold has been exceededALARM INFORM61 DUPLICATE_UNIT_ID Another unit with the same unit ID has been detectedALARM INFORM62 LINK_UNAVAILABLE The G821 status indicates that the link is unavailable NONE INFORM63 EVENT_LOG_CLEARED The event log has been cleared NONE INFORM64 FAN1_TROUBLE There is a problem with the fan ALARM INFORM65 Reserved for future use ———66 USER_REBOOT The user has rebooted the radio NONE INFORM67 MODEM_LOCAL_LOOPBACK Modulator data path is locally looped back to DemodulatorNONE INFORM68 MODEM_REMOTE_LOOPBACK Demodulator data path is looped back to modulator for remote radio loopback applicationNONE INFORM69 OPT_MUX_LOOBACK Option card multiplexed data path from Line(s) is looped backNONE INFORM70 IO1_REM_LOOPBACK_SERV Radio is server for remote radio loopback mode with its payload data at Line IO #1 looped back to the commanding local radioNONE INFORM71 IO2_REM_LOOPBACK_SERV Radio is server for remote radio loopback mode with its payload data at Line IO #2 looped back to the commanding local radioNONE INFORM72 IO3_REM_LOOPBACK_SERV Radio is server for remote radio loopback mode with its payload data at Line IO #3 looped back to the commanding local radioNONE INFORM73 IO4_REM_LOOPBACK_SERV Radio is server for remote radio loopback mode with its payload data at Line IO #4 looped back to the commanding local radioNONE INFORM74 IO1_RECVR_LOF Line IO #1 receiver Loss-of-framing alarm. I/O ALARM CRITICALTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 13775 IO1_RECVR_LOS Line IO #1 receiver Loss-of-signal alarm I/O ALARM CRITICAL76 IO1_RECVR_ALOS Line IO #1 receiver Loss-of-analog-signal alarmI/O ALARM CRITICAL77 IO1_RECVR_AIS Line IO #1 receiver detected AIS alarm I/O ALARM CRITICAL78 IO1_RECVR_RAI Line IO #1 receiver detected RAI (yellow) alarmI/O ALARM CRITICAL79 IO1_RECVR_MRAI Line IO #1 receiver detected multi-framed RAI (yellow) alarmI/O ALARM CRITICAL80 IO1_RECVR_SEF Line IO #1 receiver detected Severely Errored FramesI/O ALARM CRITICAL81 IO1_RECVR_COFA Line IO #1 receiver detected Change-of-Frame-Alignment alarmI/O ALARM CRITICAL82 IO1_RECVR_MAIS Line IO #1 receiver detected multi-framed AIS alarmI/O ALARM CRITICAL83 IO1_RECVR_FEBE Line IO #1 receiver detected E1 Far-End-Block-Errors alarmI/O ALARM INFORM84 IO1_RECVR_LCV Line IO #1 receiver detected Line-Code-Violation alarmI/O ALARM INFORM85 IO1_RECVR_CRC Line IO #1 receiver detected CRC alarm I/O ALARM INFORM86 IO1_RECVR_FBIT Line IO #1 receiver detected Frame Bit Error I/O ALARM INFORM87 IO2_RECVR_LOF Line IO #2 receiver Loss-of-framing alarm I/O ALARM CRITICAL88 IO2_RECVR_LOS Line IO #2 receiver Loss-of-signal alarm I/O ALARM CRITICAL89 IO2_RECVR_ALOS Line IO #2 receiver Loss-of-analog-signal alarmI/O ALARM CRITICAL90 I02_RECVR_AIS Line IO #2 receiver detected AIS alarm I/O ALARM CRITICAL91 IO2_RECVR_RAI Line IO #2 receiver detected RAI (yellow) alarmI/O ALARM CRITICAL92 IO2_RECVR_MRAI Line IO #2 receiver detected multi-framed RAI (yellow) alarmI/O ALARM CRITICALTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
138 LEDR Series II Installation and Operation Guide MDS 05-3627A01, Rev. C93 IO2_RECVR_SEF Line IO #2 receiver detected Severely Errored FramesI/O ALARM CRITICAL94 IO2RECVR_COFA Line IO #2 receiver detected Change-of-Frame-Alignment alarmI/O ALARM CRITICAL95 IO2_RECVR_MAIS Line IO #2 receiver detected multi-framed AIS alarmI/O ALARM CRITICAL96 IO2_RECVR_FEBE Line IO #2 receiver detected E1 Far-End-Block-Errors alarmI/O ALARM INFORM97 IO2_RECVR_LCV Line IO #2 receiver detected Line-Code-Violation alarmI/O ALARM INFORM98 IO2_RECVR_CRC Line IO #2 receiver detected CRC alarm I/O ALARM INFORM99 IO2_RECVR_FBIT Line IO #2 receiver detected Frame Bit Error I/O ALARM CRITICAL100 IO3_RECVR_LOF Line IO #3 receiver Loss-of-framing alarm I/O ALARM CRITICAL101 IO3_RECVR_LOS Line IO #3 receiver Loss-of-signal alarm I/O ALARM CRITICAL102 IO3_RECVR_ALOS Line IO #3 receiver Loss-of-analog-signal alarmI/O ALARM CRITICAL103 IO3_RECVR_AIS Line IO #3 receiver detected AIS alarm I/O ALARM CRITICAL104 IO3_RECVR_RAI Line IO #3 receiver detected RAI (yellow) alarmI/O ALARM CRITICAL105 IO3_RECVR_MRAI Line IO #3 receiver detected multi-framed RAI (yellow) alarmI/O ALARM CRITICAL106 IO3_RECVR_SEF Line IO #3 receiver detected Severely Errored FramesI/O ALARM CRITICAL107 IO3_RECVR_COFA Line IO #3 receiver detected Change-of-Frame-Alignment alarmI/O ALARM CRITICAL108 IO3_RECVR_MAIS Line IO #3 receiver detected multi-framed AIS alarmI/O ALARM CRITICAL109 IO3_RECVR_FEBE Line IO #3 receiver detected E1 Far-End-Block-Errors alarmI/O ALARM INFORMTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
139 LEDR Series II Installation and Operation Guide MDS 05-3627A01, Rev. C110 IO3_RECVR_LCV Line IO #3 receiver detected Line-Code-Violation alarmI/O ALARM INFORM111 IO3_RECVR_CRC Line IO #3 receiver detected CRC alarm I/O ALARM INFORM112 IO3_RECVR_FBIT Line IO #3 receiver detected Frame Bit Error I/O ALARM INFORM113 IO4_RECVR_LOF Line IO #4 receiver Loss-of-framing alarm I/O ALARM CRITICAL114 IO4_RE CVR_LOS Line IO #4 receiver Loss-of-signal alarm I/O ALARM CRITICAL115 IO4_RECVR_ALOS Line IO #4 receiver Loss-of-analog-signal alarmI/O ALARM CRITICAL116 IO4_RECVR_AIS Line IO #4 receiver detected AIS alarm I/O ALARM CRITICAL117 IO4_RECVR_RAI Line IO #4 receiver detected RAI (yellow) alarmI/O ALARM CRITICAL118 IO4_RECVR_MRAI Line IO #4 receiver detected multi-framed RAI (yellow) alarmI/O ALARM CRITICAL119 IO4_RECVR_SEF Line IO #4 receiver detected Severely Errored FramesI/O ALARM CRITICAL120 IO4_RECVR_COFA Line IO #4 receiver detected Change-of-Frame-Alignment alarmI/O ALARM CRITICAL121 IO4_RECVR_MAIS Line IO #4 receiver detected multi-framed AIS alarmI/O ALARM CRITICAL122 IO4_RECVR_FEBE Line IO #4 receiver detected E1 Far-End-Block-Errors alarmI/O ALARM INFORM123 IO4_RECVR_LCV Line IO #4 receiver detected Line-Code-Violation alarmI/O ALARM INFORM124 IO4_RECVR_CRC Line IO #4 receiver detected CRC alarm I/O ALARM INFORMTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
140 LEDR Series II Installation and Operation Guide MDS 05-3627A01, Rev. C19.0 IN CASE OF DIFFICULTYMDS products are designed for long life and trouble-free operation. However, this equipment, as with all electronic equipment, may have an occasional component failure. The following information will assist you in the event that servicing becomes necessary.19.1 FACTORY TECHNICAL ASSISTANCEAssistance for MDS products is available from our Technical Services group during business hours (8:00 A.M.–5:30 P.M. Eastern Time). When calling, please give the complete model number of the radio, along with a description of the trouble symptom(s) that you are experi-encing. In many cases, problems can be resolved over the telephone, without the need for returning the unit to the factory.Please use the following telephone numbers for product assistance:716-241-5510 (Phone)716-242-8369 (FAX)19.2 FACTORY REPAIRSComponent level repair of radio equipment is not recommended in the field. Many components are installed using surface mount technology, which requires specialized training and equipment for proper servicing. For this reason, the equipment should be returned to the factory for any PC board repairs. The factory is best equipped to diagnose, repair and align your radio to its proper operating specifications.125 IO4_RECVR_FBIT Line IO #4 receiver detected Frame Bit Error I/O ALARM INFORM126 DIG_REM_LOOPBACK For EIA-530, local radio is in remote loopback mode NONE INFORM127 SERV_REM_LOOPBACK For EIA-530, local radio (as remote server) is serving remote loopback modeNONE INFORM128 BAD_CLKMODE Line framers detected bad clock mode configuration NONE INFORMTable 32. Event Codes (Continued)ID EVENT NAME DESCRIPTION DEFAULTLED SNMP TRAP LEVEL
141 LEDR Series II Installation and Operation Guide MDS 05-3627A01, Rev. CIf return of the equipment is necessary, you will be issued a Returned Material Authorization (RMA) number. The RMA number will help expedite the repair so that the equipment can be repaired and returned to you as quickly as possible. Please be sure to include the RMA number on the outside of the shipping box, and on any correspondence relating to the repair. No equipment will be accepted for repair without an RMA number.A statement should accompany the radio describing, in detail, the trouble symptom(s), and a description of any associated equipment normally connected to the radio. It is also important to include the name and telephone number of a person in your organization who can be contacted if additional information is required.The radio must be properly packed for return to the factory. The original shipping container and packaging materials should be used whenever possible. All factory returns should be addressed to:When repairs have been completed, the equipment will be returned to you by the same shipping method used to send it to the factory. Please specify if you wish to make different shipping arrangements.Microwave Data Systems Inc.Customer Service Department(RMA No. XXXX)175 Science ParkwayRochester, NY 14620 USA
142 LEDR Series II Installation and Operation Guide MDS 05-3627A01, Rev. C
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 143GLOSSARY AMI—Alternate Mark Inversion. A bipolar format where consecutive marks (ones) have the polarity inverted. Spaces (ones) are repre-sented by zero volts. This technique prevents long sequences of positive or negative volt-ages.Analog—Signals with a continuously varying amplitude, such as the human voice.BERT—Bit-error rate test. The results of a BERT are normally expressed as a ratio (power of 10) of the number of bits received in error compared to the total number received.BER—Bit-error rate. See also BERT.Bit—Binary digit. The smallest unit of digital data, often represented by a one or a zero. Eight bits usually comprise a byte.bps—Bits-per-second. A measure of the infor-mation transfer rate of digital data across a communication channel.Byte—A digital “word” usually made up of eight bits.dBi—Decibels of gain relative to an isotropic radiator. (A hypothetical antenna which radi-ates equally in all directions.) Used to express antenna gain.dBm—Decibels relative to one milliwatt. An absolute unit used to measure signal power, as in transmitter power output, or received signal strength.DTR—Data Terminal Ready. A control signal sent from the radio indicating that it is ready to transmit data.CPE—Customer premise (provided) equip-ment.DCE— Data (circuit terminating) Communi-cations Equipment. In data communications terminology, this is the “modem” side of a computer-to-modem connection. The trans-ceiver is a DCE device which is designed to connect to a DTE device.Decibel (dB)—A measure of the ratio between two signal levels. Frequently used to express the gain or loss of a system.DSP—Digital Signal Processing. A processing technique that uses software algorithms to filter, shape, or otherwise modify the character-istics of a given signal. In the LEDR radio, DSP is used primarily in modulation and demodula-tion functions.E1—An international telephony standard that operates at 2.048 megabits-per-second (Mbps). This transmission speed is commonly used throughout the world except for North America (which uses T1 1.544 Mbps). Framed E1 con-sists of 30 digitized telephone channels and two 64 Kbps control channels.EIRP—Effective Isotropic Radiated Power. Commonly used to express the power radiated from a gain antenna. It is equal to the power transmitted (minus feedline loss) plus the antenna gain.Fade Margin—The maximum tolerable reduc-tion in received signal strength which still pro-vides an acceptable signal quality. This compensates for reduced signal strength due to multipath, slight antenna movement or changing atmospheric losses. Expressed in decibels.FEC—Forward Error Correction. Extra data is added to the transmitted signal to allow for detection and correction of some transmission errors.
144 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. CFrame—A segment of data that adheres to a specific data protocol and contains definite start and end points. It provides a method of synchronizing transmissions.Fresnel Zone—A point of maximum width or girth of the transmitted radio signal. Obstruc-tions in this region (the “first Fresnel zone”) can have a detrimental effect on reception quality. As a general rule, 60 percent of the first Fresnel zone should be free of obstructions in a well designed system. (Additional consider-ations are also required when planning a micro-wave path. G.703—The ITU standard defining the charac-teristics of digital interfaces (pulse shape, voltage levels, etc.). This applies to high-speed, three-level data being sent over coaxial or twisted pair lines.G.821—The ITU standard by which data trans-mission quality is measured. The analysis con-siders available vs. unavailable time.Half-Power Beamwidth—The customary way of measuring the width of a directional antenna’s radiation pattern. This beamwidth is measured in degrees between the half-power points (the point at which the power is reduced 3 dB with respect to the main beam).HDB3—High density bipolar order of 3. A line interface standard for E1 transmission that employs coding to eliminate data streams with four or more consecutive zeros.Hitless Switching Operation—Refers to the practice of switching between receive signal paths without introducing bit errors or timing slips. This feature is required for space or fre-quency diversity applications.Hot Standby—Refers to a state of the inactive (standby) transceiver in a Protected or Redun-dant configuration. In a Hot Standby configura-tion, the standby transceiver is actively transmitting.ITU—International Telecommunications Union.kbps—Kilobits-per-second.Linecode—Refers to the data coding format used by the radio for the line interface. (It does not pertain to the radio’s modulation coding.) The available linecode selections are HDB3 and AMI.Mbps—Megabits-per-second.MIB—Management Information Base. The MIB stores SNMP messages that are directed to the management console. This can include Server events, statistical data and system que-ries.Multipath Fading—Signals arriving at the receiver out of phase which have a tendency to cancel each other. It is caused by reflections of the transmitted wave and results in distortion at the receiver or weak received signal strength.Multiplexer—A signal processing unit that combines multiple streams of data into one for transmission across a single data channel.NMS—Network Management System. A soft-ware application used to configure, diagnose and monitor a communication network. The LEDR radio’s SNMP program is an example of an NMS.Protected Radio—A radio configuration where there are redundant modules that auto-matically become active in the event of a failure.Protected Operation—Refers to the practice of providing redundant transmit and receive signal paths through the radio (antenna to cus-tomer payload interface) so that no single point of failure in a single radio will interrupt the link. This feature is also referred to as 1+1 Operation and is usually provided by operating the system using Hot Standby.PSC—Protected Switch Chassis. Chassis holding data and RF control/switch circuitry in a redundant/protected configuration.
MDS 05-3627A01, Rev. C LEDR Series Installation & Operation Guide 145QAM—Quadrature Amplitude Modulation. Uses phase shifts and amplitude changes to send high-speed data in a comparatively narrow RF channel. See also QPSK.QPSK—Quadrature Phase Shift Keying. Uses four levels of phase shift to send high-speed data with a higher system gain than QAM mod-ulation. See also QAM.Redundant Switching—Refers to the practice of switching between transmit signal paths when a fault condition occurs on the currently active radio.RSSI—Received signal strength indication. Expressed in dBm.SNMP—Simple Network Management Pro-tocol. A common network management system (NMS) protocol used to monitor and control a communications networkSNR—Signal-to-noise ratio. Expressed in decibels (dB).SWR—Standing Wave Ratio. A parameter related to the ratio between forward transmitter power and the reflected power from the antenna system. As a general guideline, reflected power should not exceed 10% of the forward power (2:1 SWR).TFTP—Trivial File Transfer Protocol. A stan-dard network protocol used to send and receive files between two devices.Warm Standby—Refers to a state of the inac-tive (standby) transceiver in a Protected or Redundant configuration. In a Warm Standby configuration, the standby transceiver is not transmitting and must be keyed after switching.
146 LEDR Series Installation & Operation Guide MDS 05-3627A01, Rev. C
Continued from inside of the front cover.7. Set TCP/IP settings to enable SNMP and/or Telnet Network Management (If required)•The unit IP address are factory configured with a unique address based on the last three digits of the unit serial number.•Use IP command to change the IP address, set netmask, gateway and IP Port as necessary. In a protected radio, change the RDNT settings to match the user-assigned IP addresses.8. Assign user configurable fields (As required)Many items are user configurable, to ease customer use. These include, but are not limited to the following. See the NMS command description in the manual for more detail:•Set user information fields using INFO command (Page 62).•Set alarms and alarm mappings using the ALARM (Page 49) and EVMAP (Page 57) commands.•Set alarm thresholds using the THRESHOLD command (Page 83).•Set the SNMP community using the SNMPCOMM command (Page 81).9. Perform bench tests to verify the performance of the radioThe data performance and NMS should be verified. Use the LOOPBACK commands (Page 69) to verify data throughput. (See “BENCH TESTING OF RADIOS” on Page 124.)10.Install the linkPeak the antennas for maximum RSSI using the continuously updated RSSI command (Page 80) through the front panel screen or the TREND command (Page 86) via the NMS.11. Verify proper operation by observing the LED display•Refer to “Front Panel” on Page 13 for a description of the status LEDs.•Aim directional antenna for maximum receive signal strength using the RSSI Screen. 12. Configure the SNMP Manager software• Refer to the SNMP Handbook (Part No. 05-3532A01). (This manual is published by MDS in paper form, or may be downloaded from our web site at www.microwavedata.com.End of Quick Start GuideQUICK START GUIDE
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