Related Manuals for GE MDS LCT 450
Summary of Contents for GE MDS LCT 450
- Page 1 MDS LCT 450 Tri-Mode Data Transceiver Supporting Phase 1 Units MDS 05-4819A01, Rev. 08 MAY 2010...
- Page 2 OPERATIONAL & SAFETY NOTICES Concentrated energy from a directional antenna may pose a health RF Exposure hazard to humans. Do not allow people to come closer to the antenna than the distances listed in the table below when the transmitter is operating.
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Page 3: Front Panel Connectors
INTRODUCTION This guide presents installation and operating instructions for the MDS LCT 450 Series wireless transceiver. The transceiver (Figure 1) is designed to operate in Railroad Distrib- uted Power applications. It is software-configurable to provide flex- ible operation in a variety of applications using one hardware platform. - Page 4 Invisible place holder Antenna Connector (UHF) Power Connector: Tyco/AMP Electronics 172129-1 DC Power Input 13.6 Vdc +/-15% Figure 2. Antenna & DC Power Connectors Invisible place holder LED Indicator Panel P2 Programming & Diagnostic (DB-9) P1 Control Interface Connect (DB-25) Figure 3.
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Page 5: Installation
INSTALLATION There are three main requirements for installing the transceiver as fol- lows: • Adequate and stable primary power • An efficient and properly installed antenna system • Correct data connections between the transceiver and the data equipment. Figure 4 shows a typical station arrangement. -
Page 6: Installation Steps
Installation Steps Below are the basic steps for installing the transceiver. Refer to Figure 4 as necessary when making cable connections. 1. Mount the transceiver to a stable surface using the U-shaped bracket provided. Begin by attaching the radio’s mounting bracket to the bottom of the transceiver case (if not already attached) using the four 6-32 x 1/4 inch (6 mm) screws supplied. -
Page 7: Software Commands
CAUTION Using screws longer than 1/4 inch (6 mm) to attach the bracket to the radio may damage the internal PC board. POSSIBLE Use only the supplied screws. EQUIPMENT DAMAGE 2. Install the antenna and feedline for the station. The antenna used with the transceiver must be designed to operate in the radio’s frequency band, and be mounted in a location that pro- vides a clear path to the other associated station(s). - Page 8 Invisible place holder Transceiver To DB-9 PC Running Terminal Session Management Port Figure 6. PC Configuration Setup 2. Launch a terminal communications program, such as HyperTer- minal (included with most Windows systems). Data parameters are 8 data bits, no parity, and 1 stop bit (8N1). Data rate is deter- mined by autobaud, but 1115200 bps is the preferred speed.
- Page 9 Table 1. Command Summary (Cont’d) Command Name Function HELP User Help HREV Display Hardware Revision INIT Initialize EEPROM Defaults MODE Radio Mode MODEL Model Number Information MTYPE Modem Family Type OPT, OPTION, Display Authorized Options OPTIONS Owner’s Message Owner’s Name PROG Program PWRL, PWRM, PWRH,...
- Page 10 Each bit that is a '1' STAT identifies an alarm condition that can trigger the external output. For more information on configuring the alarm response, contact GE MDS. ASENSE [HI/LO] Alarm Sense...
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Page 11: Audio On/Off
AUDIO [ON/OFF] Audio Monitor/Orderwire Status Used to set or display Audio Monitor/Orderwire functionality (on or off) BOOT [1, 2, OTHER] Reboot Radio Used to reboot to selected image or current image if no image speci- fied. CHAN [0-8, ALL] (MHz) [RXFREQ xxx.xxxx] (MHz) [TXFREQ xxx.xxxx]... -
Page 12: Datakey [On/Off]
For CTS Key operation (see command), the timer specifies DEVICE how long to wait after asserting the CTS, before sending data out the port. A timer value of zero means that data will be DATA INTERFACE sent out the data port without imposing a key-up delay. (Other delays may be present based on selected radio operating parameters.) CTSHOLD [0-60000] Clear-to-Send Hold Time... - Page 13 In DCE mode (the default setting), CTS will go high following RTS, subject to the CTS programmable delay time. If the com- DATAKEY mand is set to , keying can be stimulated by the input of characters at the data port. Hardware flow control is implemented by signaling the CTS line if data arrives faster than it can be buffered and trans- mitted.
- Page 14 INIT Initialize EEPROM Defaults The INIT command is used to re-initialize the radio's operating param- eters to the factory defaults. This may be helpful when trying to resolve configuration problems that may have resulted from the entry of one or more improper command settings. If you are unsure of which command setting may have caused the problem, this command allows you to get back to a known working state.
- Page 15 OWM [XXX...] Owner's Message This is a command to display or program an owner's message. To pro- gram the owner's message, type then the message, followed by an ENTER keypress. To display the owner's message, type , followed by an ENTER keypress.
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Page 16: Rxtot [None, 1-255]
PTT [0-255] Push-to-Talk Delay This command sets or displays the key-up delay in milliseconds. This timer specifies how long to wait after the radio receives a key signal, before actually keying the radio. REF [xxxxx] Reference Frequency RSSI Received Signal Strength Indicator This command continuously displays the radio's Received Signal Strength Indication (RSSI) in dBm units, until you press the Enter key. -
Page 17: Show [Dc, Port, Pwr]
SCD [0-255] Soft-Carrier Dekey This command displays or changes the soft-carrier dekey delay in mil- liseconds. This timer specifies how long to wait after the removal of the keying signal before actually releasing the transmitter. A value of millisec- onds will unkey the transmitter immediately after the removal of the keying signal. -
Page 18: Tot [1-255, On, Off]
A typical spectrum analyzer display is shown in Figure 8. The display creates a received signal strength indication (RSSI) vs. frequency plot for the frequency and surrounding signals. By analyzing the display, you can determine the presence of other signals near the transceiver's operating frequency. - Page 19 When this happens, the radio must be commanded back to an unkeyed state before a new keying command is accepted. The default timer value is seconds. VERSION Firmware Version Displays package version information for each firmware image. RADIO TESTS & TEST MODE COMMANDS The following are checks and settings that can be performed by a tech- nician to ensure optimal performance of the radio.
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Page 20: Test Mode Commands
Over-Temperature Check If the transmitter is approaching an out-of-tolerance temperature con- dition, an error code is issued (see Table 3) and the lamp will flash. Further operation may be inhibited. Over-temperature condi- tions should be investigated and resolved before further use of the radio. - Page 21 DKEY Unkey Transmitter This command deactivates the transmitter after it has been keyed with command. TX Key This command activates the transmitter. See also the command. DKEY MODEM [xxxx] Analog/Digital Modem Selection This command selects the radio's modem characteristics. For digital operation enter , where equals the modem selection...
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Page 22: Troubleshooting
If the radio’s frequency has not been programmed at the factory, a default frequency will be programmed in the radio near the center of the frequency band. SELCHAN [0-8] Select Channel This command causes the radio to go to another channel when the radio is in . -
Page 23: Led Indicators
LED Indicators The LED status indicators (Figure 7) are an important troubleshooting aid and should be checked whenever a problem is suspected. Table 2 describes the function of each status LED on the front panel of the radio. Invisible place holder Figure 7. -
Page 24: Checking For Alarms-Stat Command
The codes shown are a subset of a larger pool of codes used for various GE MDS products. For this reason, the table does not show a sequential listing of all code numbers. Only the codes appli- cable to this product are shown. - Page 25 Table 3. Event Codes (Cont’d) Event Event Code Class Description Major Receiver time-out. No data received within the specified receiver time-out time. Minor A Transmitter timeout was detected. The radio stayed keyed longer than the duration specified by the TOT command. Minor A data parity fault has been detected on the PAYLOAD port.
- Page 26 Invisible place holder Figure 8. Internal Spectrum Analyzer Display P1 CONTROL INTERFACE Table 4 lists the pin functions on the P1 Control Interface connector. Table 4. P1 Control Interface Pin Descriptions (DB-25) Pin No. Description No connection (NC) Audio Isolated Ground No connection (NC) Detected Audio Channel Select 3 (see Note 1).
- Page 27 Table 4. P1 Control Interface Pin Descriptions Audio Isolated Ground No connection (NC) No connection (NC) Channel Select 2 (See Note 1) No connection (NC) RS-485/422 Isolated Ground TX Audio input to radio Channel Select Isolated Ground Channel Select 0 (Note 1) No connection (NC) PTT Isolated Ground No connection (NC)
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Page 28: Specifications
P2 PROGRAMMING & DIAGNOSTIC INTERFACE Table 4 lists the pin functions on the DB-9 DIAGNOSTIC INTERFACE connector. Table 6. Diagnostic Interface Pin Descriptions (DB-9) Pin No. Description No connection (NC) RX Data TX Data No connection (NC) Signal Ground No connection (NC) No connection (NC) No connection (NC) No connection (NC) -
Page 29: Data Characteristics
12.5 kHz B/W: 9K30F1D, 9K30F2D, 9K30F3D 25.0 kHz B/W: 16K5F1D, 16K5F2D, 16K5F3D DATA CHARACTERISTICS (P1 Control Interface Connect) Payload Signaling Type: CCITT V.23 Connector Types: DB-25 Female Payload Data Rate: 1200 bps DATA CHARACTERISTICS (P2 Programming & Diagnostic Port) Connector Type: DB-9F Signaling Standard: RS-232... - Page 30 LCT 450 Installation/Operation Guide 05-4819A01, Rev. 08...
- Page 32 GE MDS, LLC 175 Science Parkway Rochester, NY 14620 General Business: +1 585 242-9600 FAX: +1 585 242-9620 Web: www.gemds.com...