GE MDS LCT 450, Installation & Operation Manual

Page 1: ...Installation Operation Guide Supporting Phase 1 Units MDS 05 4819A01 Rev 08 MAY 2010 MDS LCT 450 Tri Mode Data Transceiver ...

Page 2: ...2 this device must accept any interference received including interference that may cause undesired opera tion Any unauthorized modification or changes to this device without the express approval of Microwave Data Systems may void the user s authority to operate this device Furthermore this device is intended to be used only when installed in accordance with the instructions out lined in this manu...

Page 3: ...ardware platform It employs microprocessor control and Digital Signal Pro cessing DSP technology to provide robust communications even under adverse conditions Figure 1 Data Transceiver NOTE Some features may not be available on all units based on the options purchased and the applicable regulatory constraints for the region in which the radio will operate Front Panel Connectors Figure 2 and Figur...

Page 4: ...nna DC Power Connectors Invisibleplaceholder Figure 3 Data Interface Connectors LED Status Panel DC Power Input 13 6 Vdc 15 Antenna Connector UHF Power Connector Tyco AMP Electronics 172129 1 LED Indicator Panel P1 Control Interface Connect DB 25 PWR DCD TXD RXD P2 Programming Diagnostic DB 9 ...

Page 5: ...ections between the transceiver and the data equipment Figure 4 shows a typical station arrangement This is followed by step by step procedures for installing the transceiver and making front and rear panel connections Figure 4 Typical Station Arrangement INTEGRATED PROCESSING MODULE IPM ANTENNA SYSTEM LOW LOSS COAXIAL CABLE 50 Ohm RADIO TRANSCEIVER PL 259 UHF CONNECTOR DB 25M CONNECTOR Antenna Co...

Page 6: ...f the transceiver case if not already attached using the four 6 32 x 1 4 inch 6 mm screws supplied Figure 5 shows the transceiver mounting dimensions with bracket attached NOTE To prevent moisture from entering the radio do not mount the case with the cable connectors pointing up Also dress all cables to prevent moisture from running along the cables and into the radio Invisibleplaceholder Figure ...

Page 7: ...es of continuous current A power connector with is pro vided with each unit see Figure 4 The transceiver is designed for use with nega tive ground systems only The power supply should be equipped with overload protection NEC Class 2 rating to protect against a short circuit between its output ter minals and the radio s power connector This completes the installation of the transceiver SOFTWARE COM...

Page 8: ...a few times at half second intervals to obtain the ready prompt on the screen Commands may now be entered from the keyboard Table 1 Command Summary Command Name Function ALARM Alarm Summary AMASK Alarm Mask AUDIO Audio Monitor Orderwire Status BOOT Reboot Radio CHAN Channel commands RX TX frequency RF power bandwidth CKEY Key TX Continuously Digital Only DATAKEY Key on Data Activity DUMP Read Curr...

Page 9: ...ROG Program PWRL PWRM PWRH PWRRXH Power Lo 5W Medium 20W Hi 25 Extra High 30W PTT Push to Talk Delay REF Reference Frequency RSSI Received Signal Strength Indicator RXTOT Loss of RX Data Alarm Time SER Radio s Serial Number SHOW Show Power Settings SPECTRUM Internal Spectrum Analyzer SQUELCH Squelch Operation SREV Software Firmware Revision Level STAT Alarm Status TEMP Internal Temperature TOT TX ...

Page 10: ... is FFFF FFFF meaning that any of the 32 possible events will activate the alarm output signal Entering the AMASK command alone displays the current setting of alarm events in hexadecimal format Entering the AMASK command followed by an eight digit hexadecimal number reprograms the speci fied events to trigger an alarm The eight digit hexadecimal number used as the command parameter specifies 0 to...

Page 11: ...that channel with have its parameters changed CKEY ON OFF Digital Only Key TX Continuously The CKEY command enables or disables the continuously keyed func tion of the radio When CKEY is set to ON the radio is continuously keyed and the Timeout Timer is disabled CTS 0 255 Clear to Send Time The CTS clear to send command selects or displays the timer value associated with the CTS line response The ...

Page 12: ...g with other radios The CTSHOLD setting can range from 0 to 60000 ms i e 60 seconds The default value is 0 which means that CTS will drop immediately after the last character is transmitted If the command is entered when the radio is in DEVICE DCE mode the response CTSHOLD N A is dis played DATAKEY ON OFF Key on Data Activity The DATAKEY command enables or disables the ability of the radio to key ...

Page 13: ...sserted immediately following the receipt of RF data but data will not be sent out the DATA INTER FACE port until after the CTS programmable delay time has expired This gives the other radio time to key DUMP Read Current Unit Profile This command causes all of the programmed settings to be displayed EMP ON OFF Modem TX Audio Pre Emphasis This command displays or sets the TX pre emphasis and RX De ...

Page 14: ... to a known working state The following changes to the radio are made when INIT is entered CTS is set to 0 DATAKEY is set to ON DEVICE is set to DCE PTT is set to 0 SCD is set to 0 TOT is set to 30 seconds and set to ON PWR is set to 37 dBm 5 watts All other commands remain as previously set MODE NORMAL TEST Radio Mode This command puts the radio into a TEST or NORMAL mode In the test mode it disa...

Page 15: ...hen ENTER The owner s name appears on the display PROG Program The PROG command used for serial reprogramming spoof entry into the bootloader PROGRAM Program The PROGRAM command spoofing MDS x710 bootloader program command to start serial reprogramming Erases and programs inactive image via serial port with xon xoff flow control Returns when com plete If successful active image is switched Only va...

Page 16: ...sables the radio s internal RTU simulator which runs with proprietary factory polling programs such as poll exe and rsim exe The internal RTU simulator is available whenever a radio has diagnostics enabled This command also sets the RTU address that the radio will respond to The internal RTU can be used for testing system payload data or pseudo bit error rate testing It can be helpful in isolating...

Page 17: ... SHOW command displays different types of information based on the command variables The different parameters are DC Display DC input output voltages PWR Display RF power output SPECTRUM xxx xx Internal Spectrum Analyzer Activates the built in spectrum analyzer tool see Figure 8 that can be displayed on a connected PC This tool is helpful in diagnosing inter ference problems on or near your channe...

Page 18: ... displays the software revision level of the transceiver firmware STAT Alarm Status This command displays the current alarm status of the transceiver If no alarms exist the message NO ALARMS PRESENT appears If an alarm does exist a two digit code 00 31 is displayed and the alarm is identified as Major or Minor A brief description of the alarm code is also given TEMP Internal Temperature This comma...

Page 19: ...ral guideline reflected power should not exceed 10 of the forward power 2 1 SWR A high SWR may result in decreased performance and should be corrected The transceiver s TXD RXD LEDs will light when the SWR is too high Actual SWR can be measured by connecting a reflected power meter such as a Bird Model 43 directional wattmeter with the proper element installed between the transceiver and the anten...

Page 20: ...n of the transceiver case or operating the unit beyond its rated duty cycle see SPECIFICA TIONS on Page 26 Test Mode Commands The following commands may be used by a technician to test the radio or to make advanced setting changes during installation and mainte nance activities BW xxxxx Channel Bandwidth This command displays the current bandwidth or sets the modem bandwidth for channel 0 This com...

Page 21: ...odem and digital operation is disabled These levels must be set to complement the audio signal level require ments of the external modem See RXLEVEL 20 to 0 and TXLEVEL 20 to 0 AUTO for details on setting these levels PWR Watts NOTE This function may not be available in all units depending on certification requirements for a particular country TX RF Power Output Level This command displays the cur...

Page 22: ... in MHz or changes channel 0 s transmit frequency The frequency step size is 6 25 kHz If the frequency has not been programmed at the factory a default fre quency will be programmed in the radio near the center of the fre quency band TROUBLESHOOTING For proper operation all radios in the network must meet these basic requirements Adequate and stable primary power Secure connections RF data and pow...

Page 23: ...SWR Check antenna system PWR lamp flashing Over temperature Observe duty cycle ensure adequate ventilation Event Codes When an alarm condition exists the transceiver creates a code that can be read on a connected terminal These codes can be helpful in resolving many system difficulties Refer to Table 3 Page 22 for a definition of the event codes Table 2 LED Status Indicators LED Name Description P...

Page 24: ...ate the need for factory repair Contact your factory representative for assistance Minor Alarms report conditions that under most circumstances will not prevent transceiver operation This includes out of tolerance con ditions baud rate mismatches etc The cause of these alarms should be investigated and corrected to prevent system failure Event Code Definitions Table 3 contains a listing of event c...

Page 25: ... signals near the transceiver s operating frequency This information can be helpful in troubleshooting interference prob lems 12 Major Receiver time out No data received within the specified receiver time out time 13 Minor A Transmitter timeout was detected The radio stayed keyed longer than the duration specified by the TOT command 17 Minor A data parity fault has been detected on the PAYLOAD por...

Page 26: ...s on the P1 Control Interface connector Table 4 P1 Control Interface Pin Descriptions DB 25 Pin No Description 1 No connection NC 2 Audio Isolated Ground 3 No connection NC 4 Detected Audio 5 Channel Select 3 see Note 1 6 RXD RS 485 422 digital Output from radio 7 PTT Keying signal see Note 2 8 RXD RS 485 422 digital Output from radio 9 No connection NC 10 No connection NC ...

Page 27: ...8 Channel Select Isolated Ground 19 Channel Select 0 Note 1 20 No connection NC 21 PTT Isolated Ground 22 No connection NC 23 Channel Select 1 Note 1 24 TXD RS 485 422 digital Input to radio 25 TXD RS 485 422 digital Input to radio Table 5 Channel Selection Table Channel 3 Channel 2 Channel 1 Channel 0 Selected High future use High High High 1 High future use High High Low 2 High future use High L...

Page 28: ...ivity 0 35 uV for 12 dB SINAD Bandwidth 12 5 kHz Maximum Applied Signal 28 dBm TRANSMITTER RF Carrier Power 5 Watts to 30 Watts Duty Cycle 25 Output Impedance 50 Ω Channel Spacing 12 5 25 kHz FCC Emission Designators 6 25 kHz B W 4K00F1D 4K00F2D 4K00F3D Table 6 Diagnostic Interface Pin Descriptions DB 9 Pin No Description 1 No connection NC 2 RX Data 3 TX Data 4 No connection NC 5 Signal Ground 6 ...

Page 29: ...Connector Types DB 25 Female Payload Data Rate 1200 bps DATA CHARACTERISTICS P2 Programming Diagnostic Port Connector Type DB 9F Signaling Standard RS 232 PRIMARY POWER Voltage 13 6 Vdc 15 Negative Ground Systems Only TX Supply Current 8 Amperes Typical 30 Watts Output RX Supply Current Operational 125 mA Nominal Power Connection 5 inch pigtail 14 AWG with Tyco AMP connector Part No 172129 1 Fuse ...

Page 30: ...28 LCT 450 Installation Operation Guide 05 4819A01 Rev 08 ...

Page 31: ...Installation Guide ...

Page 32: ...GE MDS LLC Rochester NY 14620 General Business 1 585 242 9600 FAX 1 585 242 9620 Web www gemds com 175 Science Parkway ...