GE MDS DS-EL705-9 EL705 OEM Series Radio User Manual OEM 900 Series Body

GE MDS LLC EL705 OEM Series Radio OEM 900 Series Body

Contents

Operating Instructions Part 2 of 2

QUICK START GUIDE Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installation Steps” on page 6 of this guide. 1. Mount the transceiver (see Figure 6 or Figure 7 for mounting dimensions) 2. Install and connect the antenna system to the radio • Use only good quality, low loss coaxial cable. Keep the feedline as short as possible.• Preset directional antennas in the direction of desired transmission/reception. 3. Apply DC power to the radio (10–16 Vdc @ 2 A minimum) • Measure the voltage source before connection.• Observe proper polarity.• Connect power to the power connector. 4. Set the radio’s basic configuration with a terminal (PC or HHT) connected to the INTERFACE port • Pin 23 of the INTERFACE port must be grounded to place the radio in the control and programming mode. (See Figure 12 on page 16 for a cable wiring diagram.)• Set the transmit frequency ( TX xxx.xxx ).• Set the receive frequency ( RX xxx.xxx ).• Set the network address ( ADDR xxx ). All radios in a given network must have the same address.• Set/verify the data rate using the BAUD command. The default setting is BAUD 9600 8N1 . (Refer to “TRANSCEIVER PROGRAMMING” on page 14 for command details.) 5. Connect the data equipment to the radio’s INTERFACE connector • Connection to the radio must be made with a DB-25 Male connector. Connections for typical sys-tems are shown below. • Connect only the required pins. Do not use a straight-through RS-232 cable with all pins wired.• Verify the data equipment is configured as DTE. (By default, the radio is configured as DCE.) 6. Verify proper operation by observing the LED display • See Table 5 on page 13 for a description of the status LEDs.• Refine directional antenna headings for maximum receive signal strength using the RSSI command. DB-25 DB-25TRANSCEIVER(DCE)RTU(DTE)DB-9 DB-25DB-9 to DB-25 ExampleDB-25 to DB-25 Example2323TXDRXDTXDRXDGND GND77TRANSCEIVER(DCE)RTU(DTE)NOTE: Additional connections may beneeded in some installations.See Installation for details.2332RXDTXDRXDTXDGND GND57
MDS 05-3624A01, Rev. B OEM Series I/O Guide i TABLE OF CONTENTS 1.0 INTRODUCTION .........................................................................1 1.1 Differences Among Models ..............................................................1Modem Speeds ..................................................................................2Frequency Coverage ..........................................................................21.2 Applications ......................................................................................2Point-to-Multipoint, Multiple Address Systems (MAS) ........................2Point-to-Point System .........................................................................3Switched Carrier Operation ................................................................4Single Frequency (Simplex) Operation...............................................41.3 Model Number Codes ......................................................................41.4 Accessories ......................................................................................5 2.0 INSTALLATION ............................................................................6 2.1 Installation Steps ..............................................................................62.2 Mounting the Transceiver .................................................................8Transceiver Board...............................................................................8Enclosed Transceiver..........................................................................82.3 Antennas and Feedlines ..................................................................9Antennas ............................................................................................9Feedlines ............................................................................................92.4 Power Connection ..........................................................................10Conservation (Sleep Mode)..............................................................102.5 Data Interface Connections ............................................................10 3.0 OPERATION..............................................................................13 3.1 Initial Startup ..................................................................................133.2 LED Indicators ................................................................................13 4.0 TRANSCEIVER PROGRAMMING ............................................14 4.1 Radio Programming Methods ........................................................14 PC with Radio Configuration Software ..........................................14À PC in Terminal Mode....................................................................14Ã Handheld Terminal (HHT).............................................................144.2 PC Connection and Startup ...........................................................144.3 Keyboard Commands .....................................................................16Entering Commands.........................................................................16Error Messages ................................................................................164.4 Detailed Command Descriptions ...................................................18ADDR [NONE | 1–255] .....................................................................18AMASK [0000 0000–FFFF FFFF] ....................................................18BAUD [xxxxx abc] .............................................................................19CTS [0–255] .....................................................................................19CTSHOLD [0–60000] .......................................................................19
ii OEM Series I/O Guide MDS 05-3624A01, Rev. B DEVICE [DCE | CTS KEY] ...............................................................20DKEY................................................................................................20INIT...................................................................................................20KEY ..................................................................................................21OWM [XXX...] ...................................................................................21OWN [XXX...]....................................................................................21PWR [L | M | H].................................................................................21RSSI and RSSI!................................................................................22RX [xxx.xxx]......................................................................................22RXTOT [NONE | 1–255] ...................................................................22SER ..................................................................................................22SREV................................................................................................22STAT .................................................................................................22TOT [1–255 | ON | OFF] ...................................................................23TX [xxx.xxx] ......................................................................................23 5.0 TROUBLESHOOTING...............................................................24 5.1 LED Indicators ................................................................................245.2 Event Codes ...................................................................................24Checking for Alarms—STAT command.............................................24Major Alarms vs. Minor Alarms.........................................................25Event Code Definitions .....................................................................25 6.0 TECHNICAL REFERENCE .......................................................26 6.1 OEM Series™ Transceiver Specifications ......................................266.2 Bench Testing Setup ......................................................................276.3 Helical Filter Adjustment ................................................................286.4 Upgrading the Radio’s Software .....................................................29Using Radio Configuration Software.................................................306.5 dBm-Watts-Volts Conversion Chart ................................................31 7.0 GLOSSARY OF TERMS............................................................32
MDS 05-3624A01, Rev. B OEM Series I/O Guide iii Copyright Notice This Installation and Operation Guide and all software described herein are protected by copyright: 2001 Microwave Data Systems Inc . All rights reserved.Microwave Data Systems Inc. reserves its right to correct any errors and omissions in this publication. Antenna Installation Warning 1. All antenna installation and servicing is to be performed by qualified technical personnel only. When servicing the antenna, or working at distances closer than those listed below, ensure the transmitter has been disabled. Output is measured at the antenna terminal of the transmitter. The antenna(s) used for this transmitter must be fixed-mounted on outdoor permanent structures to provide the minimum separation distances described in this filing for satisfying RF exposure compliance requirements. When applicable, RF exposure compliance may need to be addressed at the time of licensing, as required by the responsible FCC Bureau(s), including antenna co-location requirements of section 1.1307(b)(3).2. Typically, the antenna connected to the transmitter is a directional (high gain) antenna, fixed-mounted on the side or top of a building, or on a tower. Depending upon the application and the gain of the antenna, the total composite power could exceed 90 watts EIRP. The antenna location should be such that only qualified technical per-sonnel can access it, and that under normal operating conditions no other person can touch the antenna or approach within 2.3 meters of the antenna. ISO 9001 Registration Microwave Data Systems adheres to this internationally accepted quality system standard.RF ExposureSeparation distancesrequired for FCC RFExposure compliance Antenna Gain vs. Recommended Safety Distance (EL705 OEM 900 Series) Antenna Gain (EL705 OEMSeries)0–5 dBi 5–10 dBi 10–18.65 dBiMinimum RF Safety Distance 0.53 meter 0.94 meter 2.58 meters
iv OEM Series I/O Guide MDS 05-3624A01, Rev. B MDS Quality Policy Statement We, the employees of Microwave Data Systems Inc., are committed to understanding and exceeding our customer’s needs and expectations.•We appreciate our customer’s patronage. They are our business.•We promise to serve them and anticipate their needs.•We are committed to providing solutions that are cost effective, innovative and reliable, with consistently high levels of quality.•We are committed to the continuous improvement of all of our systems and processes, to improve product quality and increase customer satisfaction. FM/UL/CSA Notice This product is available for use in Class I, Division 2, Groups A, B, C & D Hazardous Locations. Such locations are defined in Article 500 of the National Fire Protection Association (NFPA) publication NFPA 70, otherwise known as the National Electrical Code.The transceiver has been recognized for use in these hazardous locations by three independent agencies —Underwriters Laboratories (UL), Fac-tory Mutual Research Corporation (FMRC) and the Canadian Standards Association (CSA). The UL certification for the transceiver is as a Rec-ognized Component for use in these hazardous locations, in accordance with UL Standard 1604. The FMRC Approval is in accordance with FMRC Standard 3611. The CSA Certification is in accordance with CSA STD C22.2 No. 213-M1987.FM/UL/CSA Conditions of Approval:The transceiver is not acceptable as a stand-alone unit for use in the haz-ardous locations described above. It must either be mounted within another piece of equipment which is certified for hazardous locations, or installed within guidelines, or conditions of approval, as set forth by the approving agencies. These conditions of approval are as follows:1. The transceiver must be mounted within a separate enclosure which is suitable for the intended application.2. The antenna feedline, DC power cable and interface cable must be routed through conduit in accordance with the National Electrical Code.3. Installation, operation and maintenance of the transceiver should be in accordance with the transceiver's installation manual, and the National Electrical Code.4. Tampering or replacement with non-factory components may adversely affect the safe use of the transceiver in hazardous loca-tions, and may void the approval.
MDS 05-3624A01, Rev. B OEM Series I/O Guide v 5. When installed in a Class I, Div. 2, Groups A, B, C or D hazardous location, observe the following: WARNING —EXPLOSION HAZARD— Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous. Refer to Articles 500 through 502 of the National Electrical Code (NFPA 70) for further information on hazardous locations and approved Division 2 wiring methods. ESD Notice (Board version only) To prevent malfunction or damage to this product, which may be caused by Electrostatic Discharge (ESD), the radio should be properly grounded at the time of installation. In addition, the installer or main-tainer should follow proper ESD precautions, such as touching a bare metal object to dissapate body charge, prior to touching components or connecting/disconnecting cables. Cable Length Recomendation MDS recommends a maximum cable length of 3.0 meters for DC power and data connections to this product. Revision Notice While every reasonable effort has been made to ensure the accuracy of this manual, product improvements may result in minor differences between the manual and the product shipped to you. If you have addi-tional questions or need an exact specification for a product, please con-tact our Customer Service Team using the information at the back of this guide. In addition, manual updates can often be found on the MDS Web site at www.microwavedata.com .
vi OEM Series I/O Guide MDS 05-3624A01, Rev. B
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 1 1.0 INTRODUCTION This guide presents installation and operating instructions for the MDS OEM Series™ of radio transceivers. The radios can be purchased as compact, modular boards for direct mounting inside remote terminal units (RTUs), programmable logic controllers (PLCs), automatic teller/banking machines, or similar equipment. They are also available as standalone units packaged in their own enclosures (see lower cover illustration).Although this manual focuses on the board-level product, the operating specifications and user connections are identical for both versions of the radio. Only the visual appearance and mounting details differ between the two. These differences are explained in the text where necessary.The transceiver (Figure 1) is a data telemetry radio designed to operate in a point-to-multipoint environment, such as electric utility Supervisory Control and Data Acquisition (SCADA) and distribution automation, gas field automation, water and wastewater SCADA, and on-line transaction processing applications. The radio employs microprocessor control to provide highly reliable communications, even under adverse conditions.MDS OEM Series™ radios use continuous-phase frequency shift keying (CPFSK) modulation with a 4-level modem. Invisible place holder Figure 1. OEM Series™ Series Data Transceiver (Board version shown—enclosed unit similar) 1.1 Differences Among Models All OEM Series™ models are very similar in appearance and functionality. The major differences are over-the-air modem speed and frequency coverage.NOTE: FINAL DESIGN WILL EMPLOYA TWO-PIN, POLARIZED POWERCONNECTOR.
2 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B Modem Speeds Two modem speeds are available in the OEM 900 transceiver—standard 9600, and an optional 4800 bps. The latter provides 3 dB of extra receive sensitivity where greater range is required.Changing the modem speed requires loading different software into the radio using MDS’ Radio Configuration Software. See Radio Programming Methods on Page 14 for more information. Frequency Coverage The OEM 900 Series radio operates in the 900 MHz frequency band. The exact frequency coverage of each model is listed in the Specifications chart on Page 26. NOTE: The radio’s frequency range (band) cannot be set or changed by the user; it is set at the factory. 1.2 Applications Point-to-Multipoint, Multiple Address Systems (MAS) Point-to-multipoint (MAS) is the most common application of the transceiver. It consists of a central master station and several associated remote units as shown in Figure 2. An MAS network provides communications between a central host computer and remote terminal units (RTUs) or other data collection devices. The operation of the radio system is “transparent” to the computer equipment. That is, the radio system transports the data in its original form, making no changes to the data format.Often, the radio system is used to replace a network of remote monitors currently linked to a central location by leased telephone lines. At the central office of such a system, there is usually a large mainframe computer and some means of switching between individual lines coming from each remote monitor. In this type of system, there is a modulator/demodulator (modem) at the main computer and at each remote site, usually built into the remote monitor itself. Since the cost of leasing a dedicated-pair telephone line is quite high, radio is frequently used as an alternative communication medium.
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 3 Invisible place holder Figure 2. MAS Point-to-Multipoint Network (Two remote stations shown—four or more are typically used) Point-to-Point System Where permitted, the transceiver may also be used in a point-to-point arrangement. A point-to-point system consists of just two radios—one serving as a master and the other as a remote—as shown in Figure 3. It provides a simplex or half-duplex communications link for the transfer of data between two locations. Invisible place holder Figure 3. Typical Point-to-Point LinkradioHOSTCOMPUTERMASTERSTATIONRTUradioREMOTERTUradioREMOTEradioHOSTCOMPUTERMASTERSTATIONRTUradioREMOTE
4 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B Switched Carrier Operation Switched Carrier operation is a half-duplex mode where the master station transmitter is keyed to send data and unkeyed to receive. MDS OEM Series™ radios operate in switched carrier mode and are keyed when data is present. NOTE: MDS OEM Series™ radios do not support full-duplexoperation (i.e., transmitting and receiving at the same time).For information on other MDS products that provide this capability, contact your sales representative. Single Frequency (Simplex) Operation Single frequency operation (also known as simplex) is a special case of switched carrier operation. Single frequency operation is automatically selected whenever the transmit and receive frequencies are set to the same value. 1.3 Model Number Codes The radio model number is printed on the PC board or on the radio enclosure, and provides key information about how the radio was configured when was shipped from the factory. See Figure 4 for an explanation of the model number characters. Invisible place holder Figure 4. MDS OEM Series™ Model Number CodesTHIS INFORMATION IS SUBJECT TO CHANGE.DO NOT USE FOR PRODUCT ORDERING.EL705BAND SUB-BAND9 = 900 MHz A = 928–960 MHzBANDWIDTH1 = 12.5 kHz DomesticENCLOSURE0 = Without Enclosure1 = With EnclosureSAFETYN = NoneE = Class 1, Div. 2 ENTLAMODEM2 = 4800 BPS3 = 9600 BPSAGENCYF = FCC/ICN = NoneNA N
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 5 1.4 Accessories The transceiver can be used with one or more of the accessories listed in Table 1. Contact the factory for ordering information. Table 1. Optional Accessories Accessory Description MDS P/N Hand-Held TerminalKit (HHT) Keypad terminal for programming, diagnostics, and control. Includes carrying case, cable set and an instruction booklet. (Accessory Power Adapter 03-3722A01 required for use with OEM radios—see below).02-1501A01Accessory Power Adapter DB-25 male-to-female adapter that attaches to the radio’s DATA INTERFACE connector. Provides regulated 10 Vdc for powering an HHT or other low power accessory. If not used, accessories could be damaged by excessive voltage (equal to the radio’s DC input voltage).03-3722A01RTU Simulator Assy. Test unit that simulates data from a remote terminal unit. Comes with polling software that runs on a PC. Used for testing OEM radio operation.(NOTE: Older MDS RTU Simulators will not work with the OEM radio as they require a higher input voltage.)03-2094A01DB-9 to DB-25 adapter Used to connect a PC with a 9-pin serial port to the radio’s DATA INTERFACE port.01-3683A01Radio Configuration Software (EL705) Radio programming software for use with a Windows-based PC. This program is available on 3.5” disks, and is included on the MDS’ InSite 6.4 (or higher) CD.03-3649A01PC Programming Adapter Kit Required when programming the radio with a personal computer operating in terminal mode. The adapter asserts the auto-open signal (ground) on pin 23 of the DATA INTERFACE port. A scratch-built cable may also be used for this purpose (see Figure 12 on Page 16).01-3683A01
6 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B 2.0 INSTALLATIONThere are three main requirements for installing the transceiver—adequate and stable primary power, a good antenna system, and the correct data connections between the transceiver and the data device. Figure 5 shows the external connections for the transceiver.Invisible place holderFigure 5. External Connections to the Transceiver Board(Connector locations identical to enclosed radio)2.1 Installation StepsBelow are the basic steps for installing the transceiver. In many cases, these steps alone are sufficient to complete the installation. More detailed explanations appear at the end of these steps.1. Mount the transceiver to a stable surface using the appropriate hardware.2. Install the antenna and antenna feedline for the station. Preset directional antennas in the desired direction of transmission and reception.3. Measure and install the primary power for the radio. The primary power must be between 10 and 16 Vdc and be capable of supplying at least 2 Amperes. (This requirement assumes a 5 watt RF output. Lower current consumption is possible if lower output power can be used in your application—see OEM Series™ Transceiver Specifications on Page 26 for details.)NOTE: Use the radio in negative ground systems only.ANTENNACONNECTOR(BNC)DATA INTERFACECONNECTOR(DB-25)Final model will have a polarized2-pin power connector (plug & cableassembly included). Red wire ispositive(+); black is negative (-).POWER CONNECTOR*(TIP/RING BARREL TYPE)*
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 74. Set the radio configuration. The transceiver is designed for quick installation with a minimum of software configuration in most cases. The selections that need to be verified for new installations are:•Transmit frequency•Receive frequency•Transmitter output power•Network address (factory default is NONE)The operating frequencies are not set at the factory unless they are specified at the time of order. Determine the transmit and receive frequencies to be used, and follow the steps below to program them.5. Connect a terminal interface (personal computer or a hand-held terminal) to the DATA INTERFACE connector. (See PC Connection and Startup on Page 14 for details.)6. Press to receive the ready “>” prompt.a. Set the transmit frequency with the TX xxx.xxx command.Press after the command.b. Set the receive frequency with the RX xxx.xxx command.Press after the command.c. Set the network address with the ADDR xxx command.Press after the command. After programming, the terminal interface reads PROGRAMMED OK to indicate successful entry.7. Disconnect the terminal interface from the DATA INTERFACE connector.8. Connect the data equipment to the transceiver’s DATA INTERFACE connector. Use only the required pins for the application—do not use a fully pinned (25 conductor) cable. Basic applications often require only the use of Pin 2 (Transmitted Data—TXD), Pin 3 (Received Data—RXD), and Pin 7 (Signal Ground).Additional connections may be required in some installations. Refer to the complete list of pin functions in Table 3 on Page 11.ENTERENTERENTERENTER
8 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B2.2 Mounting the TransceiverTransceiver BoardFigure 6 shows the mounting dimensions of the transceiver PC board. The board should be secured to the mounting surface using the holes provided at each corner of the assembly. (Fasteners are not supplied.) Note that the lower left mounting hole in the board is a threaded ferrule.Invisible place holderFigure 6. Transceiver Mounting Dimensions (Board Version)Enclosed TransceiverFigure 7 shows the mounting dimensions of the enclosed transceiver. Two cutout slots are provided on each side of the enclosure for mounting screws. (Fasteners are not supplied.)Invisible place holderFigure 7. Transceiver Mounting Dimensions (Enclosed Version)RF DATA PWR4.53 in.(11.51 cm)0.23 in.(0.58 cm)3.23 in.(8.20 cm)0.28 in.(0.71 cm)3.73 in.(9.47 cm)0.28 in.(0.71 cm) 0.20 in.(0.51 cm)4.05 in.(10.29 cm)HEATSINK2.5 in.(6.35 cm)1” in.(2.54 cm)HEATSINK HEIGHT: 0.38” (0.97 cm)3.25 in.(8.25 cm)5.00 in.(12.70 cm)1.75 in.(4.45 cm)5.97 in.(15.14 cm)6.50 in.(16.51 cm)
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 92.3 Antennas and FeedlinesAntennasThe transceiver can be used with a number of antennas. The exact style depends on the physical size and layout of the radio system. Suitable antennas are available from several manufacturers, including MDS.At master stations, omni-directional antennas (Figure 8) are typically used to provide equal coverage to all remote sites in the network.Invisible place holderFigure 8. Typical Omni-directional Antenna for Master Stations(Shown mounted to mast)At remote sites, a directional Yagi (Figure 9) or corner reflector antenna is generally recommended to minimize interference to and from other users.Invisible place holderFigure 9. Typical Yagi Antenna for Remote SitesFeedlinesThe selection of antenna feedline is very important. Poor quality cables should be avoided as they result in power losses that may reduce the range and reliability of the radio system.
10 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BTable 2 shows the losses that occur when using various lengths and types of cable in the 900 MHz band. Regardless of the type of cable used, it should be kept as short as possible to minimize signal loss.2.4 Power ConnectionThe transceiver can be operated from any well-filtered 10 to 16 Vdc power source. The power supply must be capable of providing at least 2 Amperes if 5 watt output is planned from the transceiver. Supply the power to the power connector (see Figure 5 on Page 6).Do not apply power to the radio through Pin 18 of the DB-25 Interface connector. This pin does not provide over-current input protection, and is intended only as an auxiliary output for powering a low-current (1.0 Amp max.) device, such as an RTU.NOTE: The radio is designed for use in negative ground systems only.Conservation (Sleep Mode)In some installations, such as at solar-powered sites, it may be necessary to keep the transceiver’s power consumption to an absolute minimum. This can be accomplished by configuring the data device (RTU, PLC, etc.) to ground Pin 12 of the DATA INTERFACE connector, which removes power from the radio. When the ground is removed, the radio is ready to operate within 75 milliseconds.2.5 Data Interface ConnectionsThe transceiver’s DATA INTERFACE connector is configured as a DCE (modem) and is normally connected to an EIA-232 device. The transceiver supports over-the-air asynchronous data rates up to 19200 bps. Refer to Figure 10 and Table 3 for a detailed description of each pin on the DATA INTERFACE connector.Table 2. Length vs. Loss in Coaxial Cables at 900 MHzCable Type 3 Meters(10 Feet) 15 Meters(50 Feet) 30 Meters(100 Feet) 150 Meters(500 Feet)RG-8A/U 0.85 dB 4.27 dB 8.54 dB 42.70 dB1/2 inch HELIAX 0.23 dB 1.15 dB 2.29 dB 11.45 dB7/8 inch HELIAX 0.13 dB 0.64 dB 1.28 dB 6.40 dB1-1/4 inch HELIAX 0.10 dB 0.48 dB 0.95 dB 4.75 dB1-5/8 inch HELIAX 0.08 dB 0.40 dB 0.80 dB 4.00 dBCAUTIONPOSSIBLEEQUIPMENTDAMAGE
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 11Do not use a 25 wire (fully pinned) cable for connection to the DATA INTERFACE connector. Use only the required pins for the application. Damage may result if improper connections are made. For EIA-232 signaling, typical applications require the use of Pins 2, 3, and 7 only.Invisible place holderFigure 10. Data Interface Connector Pinouts(As viewed from the front of the radio)CAUTIONUSEONLY REQUIREDPINS11325 14Table 3. DATA INTERFACE Connector Pinouts PinNumber Input/Output Pin Description1--Protective Ground. Connects to ground (negative supply potential) on the radio’s PC board and chassis.2INTXD—Transmitted Data. Accepts TX data from the connected device.3 OUT RXD—Received Data. Outputs received data to the connected device.4INRTS—Request-to-Send Input. Causes CTS to go “high.”5 OUT CTS—Clear-to-Send Output. Behavior depends on DEVICE command setting:When DEVICE is set to DCE, this pin follows RTS and will provide “buffer full” flow control.When DEVICE is set to CTS KEY, this pin provides a keyline output when receive data is present.6 OUT DSR—Data Set Ready. Active when radio is powered on.7--Signal Ground. Connects to ground (negative supply potential) at radio’s PC board.8 OUT DCD—Data Carrier Detect. Active when receiving data from another OEM Series radio with the same network address.11 OUT Receive Audio Output. For test purposes only.
12 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B12 -- Sleep Mode. A logic low on this pin removes power from the radio. The radio is ready to operate 75 milliseconds after the ground is removed.18 IN/OUT Accessory Power. Unregulated Output. Provides a source of output power for low current (1 Amp max.) accessories. Excessive drain on this connection causes the on board fuse (2 ampere) to open. The voltage at this pin matches the input voltage to the transceiver. Do not use this pin for powering the radio.19 OUT 5.8 Vdc Regulated Output. Provides a source of regulated voltage at 100 mA for low power accessories.23 IN Auto-Open. A logic low (less than 0.5 volts or ground) on this pin opens the diagnostic channel and disables normal data operation. A logic high (greater than 4 volts or open) enables the DATA INTERFACE for normal data operation. 25 OUT Alarm. A logic low (less than 0.5 volts) on this pin indicates normal operation. A logic high (greater than 4 volts) indicates that some alarm condition is present. This pin can be used as an alarm output, provided the internal series resistance of 1 kΩ is considered.Table 3. DATA INTERFACE Connector Pinouts (Continued)PinNumber Input/Output Pin Description
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 133.0 OPERATIONIn-service operation of the transceiver is completely automatic. Once the unit has been properly installed and configured, operator actions are limited to observing the radio’s LED status indicators for proper operation.3.1 Initial StartupIf all parameters are set correctly, operation of the radio can be started with these steps:1. Apply DC power to the transceiver.2. Observe the LED status panel for the proper indications (see Table 4).3. If not done earlier, refine the antenna heading of the station to maximize the received signal strength (RSSI) from the master station. Use the RSSI command from a terminal interface connected to the radio’s DATA INTERFACE connector.—See Section 4.0, TRANSCEIVER PROGRAMMING.3.2 LED IndicatorsThe transceiver includes four status LEDs visible from the top of the unit, behind the Data Interface connector (or on the front panel in enclosed units). Table 4 describes the function of each status LED.RXDTXDDCDPWRTable 4. LED Status Indicators LED Name DescriptionPWR(Power) •Continuous—Power is applied to the radio, no problems detected.•Rapid flash (five times-per-second)—Fault indication.•Flashing once every second—Unit is not programmed. Radio is in Bootloader mode.DCD(Data Carrier Detect) Flashing—Indicates another radio (with the same network address) is transmitting at the radio’s receive frequency.RXD(Receive Data) Receive data is present on DATA INTERFACE connector.TXD(Transmit Data) Transmit data is present on DATA INTERFACE connector.
14 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B4.0 TRANSCEIVER PROGRAMMINGProgramming and set-up of the transceiver is performed through the radio’s DATA INTERFACE connector with a terminal interface—either a personal computer or a hand-held terminal (HHT). This section contains a reference chart of commands (Table 5) followed by detailed descriptions for each entry.4.1 Radio Programming Methods➊ PC with Radio Configuration SoftwarePC-based Radio Configuration software is available for use with the radio (MDS P/N 03-3649A01). This software is normally supplied on 3.5” disks, but can also be found on the MDS InSite disk (version 6.4 or higher) under the title of “EL705.” On-line instructions are included with the configuration software.NOTE: When using radio configuration software, click on the openingscreen or press a key to activate the program.➋ PC in Terminal ModeA PC may also be used without the Radio Configuration software by operating it in a basic terminal mode (e.g., HyperTerminal session) and entering the radio commands listed in Table 5. The terminal communication parameters must be set to 9600 bps, with 8 data bits, no parity, and 1 stop bit (8N1).➌ Handheld Terminal (HHT)A Hand-Held Terminal kit (MDS P/N 02-1501A01) may be used to enter the radio commands listed in Table 5. The HHT communication parameters must be set to 9600 bps, with 8 data bits, no parity, and 1 stop bit (8N1).4.2 PC Connection and StartupFollow the steps below to prepare the radio for PC programming. For information about connecting and setting up a hand-held terminal, refer to the instructions provided with each HHT kit.:1. Connect a PC to the radio’s DATA INTERFACE port as shown in Figure 11. Pin 23 of the interface cable must be grounded to activate the control and programming mode. This can be done with a Programming Adapter (MDS P/N 01-3683A01), or with a scratch-built cable as shown in Figure 12.2. Press to obtain the ready “>” prompt.ENTER
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 15Invisible place holderFigure 11. Terminal Interface (PC) Connected to the Transceiver(Pin 23 on cable must be grounded—see Figure 12)
16 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BInvisible place holderFigure 12. DB-25 to DB-9 Adapter Cable(For PC control and programming)4.3 Keyboard CommandsTable 5 is a reference chart of software commands for the transceiver. Programmable information is shown in brackets [ ] following the command name. See section 4.4 following the table for detailed command descriptions.Entering CommandsTo enter a command, type the command, followed by an keystroke. For programming commands, the command is followed by and the appropriate information or values, then .Error MessagesListed below are some possible error messages that may be encountered when using the terminal interface:UNKNOWN COMMAND—The command was not recognized. Refer to the command description for command usage information.INCORRECT ENTRY—The command format or its associated values were not valid. Refer to the command description for command usage information.COMMAND FAILED—The command was unable to successfully complete. This may indicate an internal software problem.NOT PROGRAMMED—Software was unable to program the internal radio memory or the requested item was not programmed.This is a serious internal radio error. Contact MDS for assistance.TEXT TOO LONG—Response to OWN or OWM command when too many characters have been entered. Refer to the command description for command usage information.NOT AVAILABLE—The entered command or parameter was valid, but it referred to a currently unavailable choice. Refer to the command description for command usage information.RXDTXDGND235DB-9 FEMALE(TO COMPUTER)TXDRXDGND237DB-25 MALE(TO RADIO)Diagnostics Open23ENTERSPACE ENTER
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 17ACCESS DENIED—The command is unavailable to the user. Refer to the command descriptions for command information.EEPROM FAILURE— The INIT command was unable to write to EEPROM. This usually indicates a hardware error. Contact MDS for assistance.Table 5. Command summary Command name Function ADDR [NONE | 1–255]Details page 18 Set or display the network address of the radio. AMASK [0000 0000–FFFF FFFF]Details page 18Set or display hex code identifying which events trigger an alarm. BAUD [xxxxx abc]Details page 19 Set or display the DATA INTERFACE data rate and format. CTS [0–255]Details page 19 Set or display the Clear-to-Send delay in milliseconds. CTSHOLD [0–60000]Details page 19 Set or display the delay, in milliseconds, at the end of a CTS line response; CTS Key operation only. DEVICE [DCE | CTS KEY]Details page 20 Set or display the CTS options. DKEYDetails page 20 Dekey the radio (transmitter OFF) following a KEY command. INITDetails page 20 Set radio parameters to factory defaults. KEYDetails page 21 Key the radio (transmitter ON). Provides a carrier for testing. OWM [XXX...]Details page 21 Set or display the owner’s message. OWN [XXX...]Details page 21 Set or display the owner’s name. PWR [L | M | H]Details page 21 Set or display the transmit power setting. RSSI and RSSI!Details page 22 Display the Received Signal Strength Indication. RX [xxx.xxx]Details page 22 Set or display the receive frequency. RXTOT [NONE | 1–255]Details page 22 Set or display the value of the receive time-out timer. SERDetails page 22 Display the radio serial number. SREVDetails page 22 Display the software revision level.
18 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B4.4 Detailed Command DescriptionsThe only essential commands for most applications are transmit frequency (TX xxx.xxx), receive frequency (RX xxx.xxx), and network address (ADDR xxx). However, proper use of the additional commands allows you to tailor the transceiver for a specific use or conduct basic diagnostics on the radio. This section gives more detailed information for the user commands previously listed in Table 5.In many cases, the commands shown here can be used in two ways. First, you can type only the command name to view the currently programmed data. Secondly, you can set or change the existing data by typing the command, followed by a space, and then the desired entry. In the list below, allowable data values, if any, are shown in brackets following the command name. The separator symbol (|) indicates that you can enter one of the values in the list.ADDR [NONE | 1–255]The ADDR command displays or sets the network address of the radio. In order for all the radios in a network to communicate, their network addresses must be identical, or set to NONE. (The radio is shipped from the factory with ADDR set to NONE.)AMASK [0000 0000–FFFF FFFF]The AMASK (alarm mask) command displays or sets which events cause the alarm output signal to be active. Normally, the mask is FFFF FFFF, meaning that any of the 32 possible events activate the alarm output signal. No special configuration is required for typical applications.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 specified events to trigger an alarm.Each bit that is a ‘1’ identifies an associated alarm condition that can trigger the alarm output status line. Each bit that is a ‘0’ treats the associated alarm as irrelevant when deciding whether or not to assert the alarm output status line. STATDetails page 22 Display the current alarm status. TOT [1–255 | ON | OFF]Details page 23 Set or display the time-out timer status and the timer delay in milliseconds. TX [xxx.xxx]Details page 23 Set or display the transmit frequency.Table 5. Command summary (Continued)Command name Function
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 19Thus, an eight-digit hexadecimal number can classify up to 32 events as alarm triggers for the alarm output status line. See Table 6 on Page 25 for a list of the event codes and their hex values. The hex value of the mask is simply the sum of the hex values of the event codes corresponding to the alarm triggering events.BAUD [xxxxx abc]This command sets (or displays) the communication attributes for the DATA INTERFACE port.The first parameter (xxxxx) is baud rate. Baud rate is specified in bits-per-second (bps) and must be one of the following speeds: 1200, 2400, 4800, 9600, or 19200.The second parameter of the BAUD command (abc) is a three-character block indicating how the data is formatted:a = Data bits (7 or 8)b = Parity (N for None, O for Odd, E for Even)c = Stop bits (1 or 2)The factory default setting is 9600 baud, 8 data bits, no parity, 1 start bit, and 1 stop bit (Example: 9600 8N1).NOTE: 7N1, 8O2, and 8E2 are invalid communication settings and arenot supported by the transceiver.CTS [0–255]The CTS (clear-to-send) command sets or displays the timer value associated with the CTS line response. The command parameter ranges from 0 to 255 milliseconds.For DCE operation (see DEVICE command), the timer specifies how long to wait after the RTS line goes high, before the radio asserts CTS. A CTS value of zero asserts the CTS line immediately after the RTS line goes high.For CTS Key operation (see DEVICE command), the timer specifies how long to wait after asserting the CTS, before data becomes available. A timer value of zero means that data is available as soon as receivedCTSHOLD [0–60000]For CTS Key operation (see DEVICE command), the CTSHOLD command sets or displays the timer value associated with the end of a CTS line response. The timer value specifies the length of time that CTS remains active following the last byte from the RXD pin of the DATA INTERFACE port. The time is in milliseconds. The default value is 0, which means that CTS drops immediately after the last byte.
20 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BFor DCE operation (see DEVICE command), this command has no effect. The response CTSHOLD n/a is displayed.DEVICE [DCE | CTS KEY]The DEVICE command sets or displays the device behavior of the radio. The command parameter is either DCE or CTS KEY.The default selection is DCE. In this mode, CTS goes high following RTS, subject to the CTS programmable delay time. Hardware flow control is implemented by signaling the CTS line if data arrives faster than it can be buffered and transmitted. The transceiver does not require an RTS/CTS handshake. Data is transmitted whenever there is data to send.If CTS KEY is selected, the CTS line transforms to a Receive Data indicator (with programmable delays) in order to provide a control line for use by other devices. The RTS line is ignored. CTS is asserted immediately following the receipt of RF data, but data is not sent out the DATA INTERFACE port until the CTS programmable delay time has expired. (See CTSHOLD description for the delay available following the data.)A typical use of CTSKEY is to provide a keyline (or RTS signal) for a half-duplex modem or other radio.DKEYThis command deactivates the transmitter after it has been keyed with the KEY command.NOTE: The DKEY and KEY commands are not intended for normaloperation. They are tools for field testing and installation.INITThe INIT command is used to re-initialize the radio’s operating parameters 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. Entry of this command allows you to get back to a known working state. The following changes to the radio are made when INIT is entered:•AMASK is set to FFFF FFFF•BAUD is set to 9600 baud, 8 data bits, no parity, and 1 stop bit (9600 8N1)•CTS is set to 0•CTSHOLD is set to 0•DEVICE is set to DCE
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 21•PWR is set to H [+37 dBm (5 watts)]•RXTOT is set to NONE•TOT is set to OFFAll other commands stay at their previously established settings.KEYThis command activates the transmitter. The transmitter stays keyed until either the DKEY command is entered, or the transmitter time-out timer is enabled and times out. See also the DKEY and TOT commands.NOTE: The KEY and DKEY commands are not intended for normaloperation. They are tools for field testing and installation.OWM [XXX...]This is a command to display or set an owner’s message. To program the owner’s message, type OWM then the message, followed by . The maximum number of characters that can be entered is 30.To display the owner’s message, type OWM then . The owner’s message appears on the display.OWN [XXX...]This is a command to display or set an owner’s name. To program the owner’s name, type OWN then the name, followed by . The maximum number of characters that can be entered is 30.To display the owner’s name, type OWN then . The owner’s name appears on the display.PWR [L | M | H]NOTE: This function may not be available, depending on certificationrequirements for a particular region.This command displays or sets the desired RF forward output power setting of the radio. The PWR command parameter is specified as L (low), M (medium), or H (high). The default setting is H. The values of L, M, and H are:L = 24 dBm (250 mW)M = 30 dBm (1 W)H = 37 dBm (5 W)ENTERENTERENTERENTER
22 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BRSSI and RSSI!These commands continuously display the radio’s Received Signal Strength Indication (RSSI) in dBm units. Incoming signal strengths from –50 dBm to –120 dBm are displayed.The RSSI command causes display of received signal strength, updated once every second. Press to terminate the display.The RSSI! command displays a one-time reading of the RSSI at the diagnostic port.RX [xxx.xxx]This command sets or displays the radio’s receive frequency in MHz. The frequency must be an integer multiple of the step size and must be in the valid range. If the entered frequency is invalid, the terminal interface displays the message INCORRECT ENTRY.NOTE: The frequency must be in the valid range for the sub-bandpurchased, and may not be programmed “between” channels.RXTOT [NONE | 1–255]The RXTOT command sets or displays the receive time-out timer value in minutes. This timer triggers an alarm (event 12) if data is not detected within the specified time.Entering the RXTOT command without a parameter displays the timer value in minutes. Entering the RXTOT command with a parameter ranging from 1 to 255 resets the timer in minutes. Entering the RXTOT command with the parameter NONE disables the timer.SERThis command displays the radio’s serial number as recorded at the factory.SREVThis command displays the software revision level of the transceiver firmware.STATThis command displays the current alarm status of the transceiver.If no alarms exist, the message NO ALARMS PRESENT appears at the top of the terminal display.ENTER
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 23If 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. Detailed descriptions of event codes are provided in Table 6 on Page 25.If more than one alarm exists, the word MORE appears at the bottom of the screen and additional alarms are viewed by pressing the key. Alarms are displayed in ascending order, major alarms before minor ones.TOT [1–255 | ON | OFF]This command sets or displays the transmitter time-out timer value (1–255 seconds), as well as the timer status (ON or OFF). The command parameter can be either the timer value or the status, but not both. The parameter ON enables the timer; OFF disables the timer.If the timer is on, and the radio remains keyed for a longer duration than the TOT value, the transmitter is automatically unkeyed. When this happens, the radio must be commanded back to an unkeyed state before a new keying command is accepted.By default the timer is ON and set to 30 seconds.TX [xxx.xxx]This command sets or displays the radio’s transmit frequency in MHz. The frequency must be an integer multiple of the step size and must be in the valid range. If the entered frequency is invalid, the terminal interface displays the message INCORRECT ENTRY.NOTE: The frequency must be in the valid range for the sub-bandpurchased, and may not be programmed “between” channels.ENTER
24 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B5.0 TROUBLESHOOTINGSuccessful troubleshooting of the radio system is not difficult, but it requires a logical approach. It is best to begin troubleshooting at the master station, as the rest of the system depends on the master for polling commands. If the master station has problems, the operation of the entire network can be compromised.It is good practice to start by checking the simple things. For proper operation, all radios in the network must meet these basic requirements:•Adequate and stable primary power.•Secure connections (RF, data, and power).•An efficient and properly aligned antenna system with a good received signal strength (at least –90 dBm). It is possible for a system to operate with weaker signals, but reliability may be degraded. •Proper programming of the transceiver’s operating parameters (see Section 4.0, TRANSCEIVER PROGRAMMING).•The correct interface between the transceiver and the connected data equipment (correct cable wiring, proper data format, timing, etc.).5.1 LED IndicatorsThe LED status indicators are an important troubleshooting tool and should be checked whenever a problem is suspected. Table 4 on Page 13 describes the function of each status LED.5.2 Event CodesWhen an alarm condition exists, the transceiver creates a code that can be read on a terminal connected to the DATA INTERFACE port. These codes can be very helpful in resolving many system difficulties. Table 6 lists the definitions of the event codes.Checking for Alarms—STAT commandTo check for alarms, enter STAT on the terminal interface. If no alarms exist, the message NO ALARMS PRESENT appears at the top of the display.If an alarm does exist, the STAT command displays a two-digit alarm code (00–31) and the event is identified as a Major or Minor Alarm. A brief description of the alarm is also given.If more than one alarm exists, the word MORE appears at the bottom of the screen. To view additional alarms, press .ENTER
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 25Major Alarms vs. Minor AlarmsMajor Alarms—report serious conditions that generally indicate a hardware failure, or other abnormal conditions that prevent (or seriously degrade) further operation of the transceiver. Major alarms generally indicate the need for factory repair. Contact MDS for further assistance.Minor Alarms—report conditions that, under most circumstances do not prevent transceiver operation. These include out-of-tolerance conditions, baud rate mismatches, etc. The cause of these alarms should be investigated and corrected to prevent possible system failure.Event Code DefinitionsTable 6 contains a listing of the event codes that may be reported by the transceiver.Table 6. Event Codes Event Code Hex Value Event Class Description STATUS Message00 0000 0000 -- No alarms present. No Alarms Present1–3 -- -- Not used. --04 0800 0000 Major One or both of the internal programmable synthesizer loops is reporting an out-of-lock condition.SynthesizerOut-of-Lock5–7 -- -- Not used. --08 0080 0000 Major The system is reporting that it has not been calibrated. Factory calibration is required for proper radio operation.Radio Not Calibrated09 -- -- Not used. --10 0020 0000 Major The internal microcontroller was unable to properly program the system to the appropriate EEPROM defaults. A hardware problem may exist.EEPROM Write Failure11 -- -- Not used. --12 0008 0000 Major Receiver time-out. No data received within the specified receiver time-out time. Receiver time-out13 0004 0000 Major Transmitter time-out. The radio was keyed for a duration exceeding the time-out timer setting. (This alarm clears the next time the radio keys.)Transmitter time-out14–16 -- -- Not used. --17 0000 4000 Minor A data parity fault has been detected on the DATA INTERFACE connector. This usually indicates a parity setting mismatch between the radio and the RTU.Data Parity Error18 0000 2000 Minor A data framing error has been detected on the DATA INTERFACE connector. This may indicate a baud rate mismatch between the radio and the RTU.Data Framing Error19–30 -- -- Not used. --
26 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B6.0 TECHNICAL REFERENCE6.1 OEM Series™ Transceiver SpecificationsMODELSMDS OEM Series™ 900: Licensed 900 MHz TransceiverRADIO TYPESynthesized, half duplex, 12.5 kHz channel spacing, split frequency, or simplexENVIRONMENTALTemperature Range: –30 to +60 degrees CHumidity: 0 to 95% at 40 degrees CBoard Dimensions: 4.53″ W x 0.75″ H x 3.73″ D11.51 cm W x 1.90 cm H x 9.47 cm DEnclosed Dimensions: 6.5″ W x 1.75″ H x 5.00″ D16.51 cm W x 4.45 cm H x 12.70 cm DWeight: (Board version) 4.5 oz. (0.13 kg)(Enclosed version) 1 lb. (0.45 kg)RF Connector: BNCEnclosure Type (if furnished): AluminumTRANSMITTERFrequency Ranges (900 MHz): 928 to 960 MHzFrequency Increments: 6.25 kHz (Standard)5 kHz (Special)Modulation Type: 4 level CPFSKCarrier Power: 250 mW, 1 W, 5 W programmable(+24 DBM, +30 dBM, +37 dBm)Duty Cycle: 50% (100% with additional heatsinking)Output Impedance: 50 ohmsFrequency Stability: 1.5 ppm, –30 to +60 degrees CChannel Spacing: 12.5 kHzSpurious and Harmonics: –60 dBcTime-out Timer: 1 to 255 secondsTransmitter Keying: On dataKey-up Time: 2 ms
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 27RECEIVERType: Double conversion superheterodyne(45 MHz and 450 MHz IF)Frequency Ranges (900 MHz): 928 to 960 MHzFrequency Increments: 6.25 kHz (Standard)5 kHz (Special)Frequency Stability: 1.5 ppm, –30 to +60 degrees CSpurious and Image Rejection: –70 dBSensitivity: 12 dB Sinad @ –116 dBmData Performance: 1 x 10-6 @ –108 dBm (9600 bps)1 x 10-6 @ –111 dBm (4600 bps)Intermodulation Rejection: –70 dB minimumSelectivity: 50 dB typical at adjacent channel (EIA)Bandwidth: 12.5 kHzDATA INTERFACERS-232 through DB-25 ConnectorBaud Rates at Interface Port: 1200, 2400, 4800, 9600, and 19200* bpsOver-the-Air Data Rate: 9600 bps4800 bpsData Latency: < 20 ms typicalDIAGNOSTICSSelf Test: YesLocal RS-232 RSSI and Setup: Yes4 LED Display: PWR, DCD, TXD, and RXDPRIMARY POWERVoltage: 10 to 16 Vdc through a 5.5 mm pin plug or 2-pin MDS connectorRX Current at 13.8 Vdc (typical): 75 mATX Current at 13.8 Vdc (typical): 1.75 A @ high power (5W)700 mA @ medium power (1W)400 mA @ low power (250 mW)Circuit Protection: 2 amp fuse, surface mountReverse Polarity Protection: Diode across primary input* At 19200 bps, the radio operates in a buffered mode, storing 50 characters at a time.6.2 Bench Testing SetupFigure 13 shows a sample test setup that can be used to verify the basic operation of transceivers in a shop setting. The test can be performed with any number of remote radios by using a power divider with the required number of output connections.
28 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BThe RTU simulator (MDS Part No. 03-2094A01) is a microcontroller that emulates a remote terminal unit operating at 1200, 2400, 4800, or 9600 bps. Custom software is supplied with the RTU simulator that allows continuous polling of remote radios using an IBM-compatible personal computer. The software reports the number of polls sent, polls received, and the number of errors detected.NOTE: It is very important to use attenuation between all units in thetest setup. The amount of attenuation required depends on thenumber of units being tested and the desired signal strength(RSSI) at each transceiver during the test. A maximum level of -50 dBm is recommended at eachtransceiver, because the radio’s RSSI reporting will not beaccurate above this level. In no case should a signal strongerthan +10 dBm be applied to any transceiver in the test setup,or damage may result.Invisible place holderFigure 13. Typical setup for bench testing of radios6.3 Helical Filter AdjustmentIf the operating frequency of the radio is changed more than 10 MHz, the helical filters should be adjusted for maximum received signal strength (RSSI). If adjustment is required, follow these steps:1. For enclosed units, remove the top cover from the transceiver by loosening the eight screws and lifting straight up.2. Carefully remove the shield cover from the PC board.3. Locate the helical filters. See Figure 14.MASTER STATIONCOMPUTER RUNNING MDSPOLL.EXE PROGRAMREMOTERADIOREMOTERADIOREMOTERADIO REMOTERADIONON-RADIATING ATTENUATOR•Install on any unused divider ports•2W minimum ratingPOWER DIVIDERPOWER ATTENUATORS•Fixed or adjustable•2W minimum ratingRTU SIMULATORS(SEE TEXT)
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 294. Apply a steady signal to the radio at the programmed receive frequency (–80 dBm level recommended; no stronger than –60 dBm). This can be done with a signal generator or an over-the-air signal.5. Measure the radio’s RSSI using a terminal interface. See Section 4.0, TRANSCEIVER PROGRAMMING on Page 14.6. With a non-metallic tool, carefully adjust each section of the helical filter for maximum RSSI. Repeat several times to work out any interactions. Re-install the cover to the transceiver.Invisible place holderFigure 14. Helical Filter Location(Shield cover removed)6.4 Upgrading the Radio’s SoftwareFrom time to time, new product features or software maintenance files become available from MDS. This section describes the steps necessary to install new software into the transceiver using a PC connected to the radio’s DATA INTERFACE port. When software upgrades become available, they can be obtained on the MDS Web site at www.microwavedata.com, or you can contact MDS to request radio software.NOTE: Software upgrades are distributed as ASCII files with a “.S28”extension. These files use the Motorola S-record format. HELICALADJUSTMENTSHELICALADJUSTMENTS
30 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BUsing Radio Configuration SoftwareIf you already have software that you wish to download into the transceiver, Radio Configuration Software (MDS P/N 03-3649A01) may be used to perform the installation. (This software is referred to as “EL705” on the InSite 6.4 or higher CD.) To use this method, proceed as follows:1. Connect a PC to the radio’s DATA INTERFACE port via a DB-9 to DB-25 adapter (MDS P/N 01-3683A01 or equivalent). If desired, an adapter cable may be constructed from scratch using the wiring diagram shown in Figure 15.Invisible place holderFigure 15. DB-25 to DB-9 Adapter Cable2. Run the Radio Configuration software. (Click on the opening screen or press a key to activate the program.)3. Under the SYSTEM menu, select RADIO SOFTWARE UPGRADE. Follow the prompts and online instructions to locate the desired software and complete the upgrade. The radio’s PWR LED flashes rapidly to confirm that a download is in progress. The download takes about two minutes.NOTE: If a software download fails, the radio is left unprogrammedand inoperative. This is indicated by the PWR LED flashingslowly (1 second on, 1 second off). This condition is onlylikely if a power failure occurred to the computer or radioduring the downloading process. The download can beattempted again when the fault has been corrected.2RXDTXDGND235DB-9 FEMALE(TO COMPUTER)TXDRXDGND37DB-25 MALE(TO RADIO)
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 316.5 dBm-Watts-Volts Conversion ChartTable 7 is provided as a convenience for determining the equivalent wattage or voltage of an RF power expressed in dBm.Table 7. dBm-Watts-Volts Conversion—for 50 Ohm SystemsdBm 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
32 OEM Series™ I/O Guide MDS 05-3624A01, Rev. B7.0 GLOSSARY OF TERMSIf you are new to digital radio systems, some of the terms used in this guide may be unfamiliar. The following glossary explains many of these terms and is helpful in understanding the operation of the transceiver.Antenna System Gain—A figure, normally expressed in dB, representing the power increase resulting from the use of a gain-type antenna. System losses (from the feedline and coaxial connectors, for example) are subtracted from this figure to calculate the total antenna system gain.Bit—The smallest unit of digital data, often represented by a one or a zero. Eight bits (plus start, stop, and parity bits) usually comprise a byte.Bits-per-second—See BPS.BPS—Bits-per-second. A measure of the information transfer rate of digital data across a communication channel.Byte—A string of digital data usually made up of eight data bits and start, stop and parity bits.Data Circuit-terminating Equipment—See DCE.Data Communications Equipment—See DCE.Data Terminal Equipment—See DTE.dBi—Decibels referenced to an “ideal” isotropic radiator in free space. Frequently used to express antenna gain.dBm—Decibels referenced to one milliwatt. An absolute unit used to measure signal power, as in transmitter power output, or received signal strength.DCE—Data Circuit-terminating Equipment (or Data Communications Equipment). In data communications terminology, this is the “modem” side of a computer-to-modem connection. The MDS OEM Series™ is a DCE device.Decibel (dB)—A measure computed from the ratio between two signal levels. Frequently used to express the gain (or loss) of a system.DTE—Data Terminal Equipment. A device that provides data in the form of digital signals at its output. Connects to the DCE device.
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 33Fade Margin—The greatest tolerable reduction in average received signal strength that is anticipated under most conditions. Provides an allowance for reduced signal strength due to multipath, slight antenna movement, or changing atmospheric losses. A fade margin of 20 is usually sufficient in most systems.Hardware Flow Control—A transceiver feature used to prevent data buffer overruns when handling high-speed data from the RTU or PLC. When the buffer approaches overflow, the radio drops the clear-to-send (CTS) line, which instructs the RTU or PLC to delay further transmission until CTS again returns to the high state.Host Computer—The computer installed at the master station site, which controls the collection of data from one or more remote sites.Latency—The delay (usually expressed in milliseconds) between when data is applied to TXD (Pin 2) at one radio, until it appears at RXD (Pin 3) at the other radio.MAS—Multiple Address System. A radio system where a central master station communicates with several remote stations for the purpose of gathering telemetry data.Master (Station)—Radio which is connected to the host computer. It is the point at which polling enters the network.Multiple Address System—See MAS.PLC—Programmable Logic Controller. A dedicated microprocessor configured for a specific application with discrete inputs and outputs. It can serve as a host or as an RTU.Point-to-Multipoint System—A radio communications network or system designed with a central control station that exchanges data with a number of remote locations equipped with terminal equipment.Poll—A request for data issued from the host computer (or master PLC) to a remote radio.Programmable Logic Controller—See PLC.Received Signal Strength Indication—See RSSI.Redundant Operation—A station arrangement where two transceivers and two power supplies are available for operation, with automatic switchover in case of a failure.Remote (Station)—A radio in a network that communicates with an associated master station.Remote Terminal Unit—See RTU.
34 OEM Series™ I/O Guide MDS 05-3624A01, Rev. BRSSI—Received Signal Strength Indication. A measure, in dBm, of the strength of the signal received by a radio from an antenna. The radio must be properly calibrated for the RSSI value to be meaningful.RTU—Remote Terminal Unit. A data collection device installed at a remote radio site.SCADA—Supervisory Control And Data Acquisition. An overall term for the functions commonly provided through an MAS radio system.Supervisory Control And Data Acquisition—See SCADA.
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide I-1INDEXAACCESS DENIED error message 17Accessories 5Accessory power adapter 5Accessory Power pinout (Pin 18) 12Adaptersaccessory power adapter 5DB-9 to DB-25 5PC programming adapter kit 5Alarmsalarm code definitions 25major vs. minor 25pinout (Pin 25) 12using STAT command to display 22AMASK command 18Antennainstallation 6RSSI command used to refine heading 13system gain, defined 32Yagi, illustrated 9Applications 2Multiple Address Systems (MAS) 2point-to-multipoint system 2point-to-point system 3Auto-Open, pinout (Pin 23) 12BBAUD command 19Bench testing (radio performance) 27–28Bit, defined 32Bits-per-second. See BPSBPS (bits-per-second), defined 32Byte, defined 32CCable, loss due to length of coaxial 10COMMAND FAILED error message 16Command summary, table 17CommandsAMASK (set/display alarm triggers) 18BAUD (set/display rate, encoding) 19CTS (set/display CTS line response timer) 19descriptions 18DEVICE (set/display radio behavior) 20DKEY (deactivate transmitter after KEY command) 20entering on terminal interface 16INIT (reinitialize radio to factory defaults) 20KEY (activate transmitter) 21OWM (set/display owner’s message) 21OWN (set/display owner’s name) 21PWR (set/display RF forward output power) 21RSSI (display RSSI) 22RX (set/display receive frequency) 22RXTOT (set/display receive time-out timer value) 22SER (display radio serial number 22SREV (display software revision level) 22STAT (display current alarm status) 22terminal interface 16TOT (set/display time-out value and timer status) 23TX (set/display transmit frequency) 23Connections to radio, illustrated 6Conversions, dBm-Watts-Volts 31CTS command 19CTS pinout (Pin 5) 11DData interfaceconnector pinouts 11installing connection 10specifications 27dB. See Decibel 32DB-9 to DB-25 adapter 5illustrated 16, 30dBi, defined 32dBm, defined 32DCDpinout (Pin 8) 11DCD LEDdescription 13DCE (Data Cirtuit-terminating Equipment), defined 32Decibel (dB), defined 32Description, product 1DEVICE command 20Diagnostic Channel Enable, pinout (Pin 23) 12Diagnosticsinterface specifications 27Differences among models 1Displayalarm status (STAT command) 22alarm triggers (AMASK command) 18baud rate and encoding (BAUD command) 19CTS line response timer (CTS command) 19owner’s message (OWM command) 21owner’s name (OWN command) 21radio behavior (DEVICE command) 20radio serial number (SER command) 22receive frequency (RX command) 22receive time-out timer value (RXTOT command) 22RF forward output power (PWR command) 21RSSI (RSSI command) 22software revision level (SREV command) 22time-out value and timer status (TOT command) 23transmit frequency (TX command) 23DKEY command 20Downloading new software 29DSR pinout (Pin 6) 11DTE (Data Terminal Equipment), defined 32
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide I-2EEEPROM FAILURE error message 17Enable/disablediagnostic channel, pinout (Pin 23) 12Environment specifications 26Error messages 16access denied 17command failed 16EEPROM failure 17incorrect entry 16not available 16not programmed 16text too long 16unknown command 16FFade margin, defined 33Feedlines 9Filter, helical, adjustment 28Frequencyadjusting helical filter when changed 28setting. See TX and RX commandsGGlossary 32Groundprotective (Pin 1) 11signal (Pin 7) 11HHalf-duplex 3switched carrier operation 4Hand-Held Terminal (HHT) 5Hardware flow control, defined 33Helical filteradjusting 28locations, illustrated 29Host computer, defined 33IIllustrationsantenna, Yagi 9board version 1connections to radio 6DB-25 to DB-9 adapter cable 16, 30helical filter locations 29MDS OEM Series™ model number codes 4point-to-point link 3terminal interface connected to transceiver 15transceiver mounting dimensions, enclosed version 8INCORRECT ENTRY error message 16INIT command 20Installation 6–12antenna 6configuring transceiver 7DATA INTERFACE connection 7data interface connections 10power 6power connection 10steps 6KKEY command 21Keyingon data (DKEY command) 20switched carrier operation 4switched carrier, defined 4LLatency, defined 33LEDsDCD 13indicators, described 13PWR 13RXD 13RXD, Pin 3 11status indicators, illustrated 13TXD 13TXD, Pin 2 11Loss. See SignalMMAS (Multiple Address System) 2defined 33Master Stationdefined 33keying behavior 4Model number codes 4MDS OEM Series™, illustrated 4Modelssystem specifications 26NNOT AVAILABLE error message 16NOT PROGRAMMED error message 16OOperation 13environment, specifications for 26Output, 5.8 Vdc regulated, pinout (Pin 19) 12OWM command 21OWN command 21Owner’s message, set/display. See OWM commandOwner’s name, set/display. See OWN commandPPC Programming Adapter Kit 5Performancetesting 27–28Pinouts on data interface 11PLC (Programmable Logic Controller), defined 33Point-to-multipointdefined 33system 2Point-to-pointlink, illustrated 3system 3
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide I-3Poll, defined 33Powerconnection 10installing 6LED status indicator (PWR LED) 13RF, chart for converting dBm-Watts-Volts 31Power attenuators, use of in testing 28Primary powerspecifications 27Procedureschecking for alarms (STAT command) 24connecting terminal interface 14downloading new software 29entering commands using a terminal interface 16helical filter adjustment 28installation 6operation 13performance optimization 13reading LED status indicators 13troubleshooting 24Productaccessories 5description 1display radio serial number (SER command) 22model number codes 4Programming, transceiver 14–17PWRcommand 21PWR LEDdescription 13RRadioconfiguration software 5, 29serial number, displaying (SER command) 22Radio typesystem specifications 26Receive Audio Output pinout (Pin 11) 11Received signal strength indication See RSSI 34Receiverspecifications 27Redundant operation, defined 33RemoteStation, defined 33Resettingtransceiver (INIT command) 20Revision leveldisplay software (SREV command) 22RSSIadjusting helical filter for increased signal strength 28command 22command, used to refine antenna heading 13defined 34RTS pinout (Pin 4) 11RTU (Remote Terminal Unit)defined 34RTU simulator 5, 28RX command 22RXD LEDdescription 13Pin 3 11RXTOT command 22SSCADA (Supervisory Control And Data Acquisition), defined 34SER command 22Setalarm triggers (AMASK command) 18receive time-out timer value (RXTOT command) 22Signalground (Pin 7) 11loss due to coaxial cable length, table 10Simplex 3single-frequency operation 4special case of switched carrier operation 4Softwarecontrol from PC 29display revision level 22upgrades (.S28 files) 29upgrading 29Specificationsdata interface 27diagnostics interface 27environment 26models 26primary power 27radio type 26receiver 27transceiver 26–27transmitter 26SREV command 22STAT command 22Switched carrier operation 4TTablesaccessories 5alarm code definitions 25command summary 17conversions, dBm-Watts-Volts 31data interface connector pinouts 11LED status indicators 13length vs. loss in coaxial cables 10Technical reference 26–31bench test setup 27Terminal Interfaceconnected to transceiver, illustrated 15connection and startup 14entering commands 16error messages displayed on 16keyboard commands 16Testing. See bench testingTEXT TOO LONG error message 16Timer, set/display time-out value and status (TOT command) 23TOT command 23Transceiverapplications 2board version, illustrated 1configuring for operation 7dimensions, mounting enclosed version, illustrated 8mounting 6mounting board version 8mounting enclosed version 8programming 14–17
MDS 05-3624A01, Rev. B OEM Series™ I/O Guide I-4specifications 26–27upgrading software 29Transmitterspecifications 26Troubleshooting 24–25connecting terminal interface for displaying alarm codes 14STAT command (Status) 24TX command 23TXD LEDdescription 13Pin 2 11UUNKNOWN COMMAND error message 16Upgrading software 29
IN CASE OF DIFFICULTY...MDS 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 informa-tion will assist you in the event that servicing becomes necessary.FACTORY TECHNICAL ASSISTANCETechnical assistance for MDS products is available from our Customer Support Team 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 expe-riencing. 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:716-242-9600 (Phone)716-242-9620 (Fax)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.If 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
175 Science Parkway, Rochester, New York 14620General Business: +1 (716) 242-9600FAX: +1 (716) 242-9620Web: www.microwavedata.com

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