GE MDS EL-705 EL705 User Manual 3624 OEMLss

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EL 705 User Manual

Exhibit 21 Users Manual

MDS 05-3624A01, Rev. A JUNE 2000 Data Transceiver MDS OEM-L/ss

QUICK START GUIDE Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installation Steps” on page 8 of this guide. 1. Install and connect the antenna system to the radio • Use good quality, low loss coaxial cable. Keep the feedline as short as possible.• Preset directional antennas in the direction of desired transmission. 2. 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.) The markup had a question about this figure. Please verify 3. Apply DC power to the radio (10–30 Vdc @ 1.5 A minimum) • Observe proper polarity. 4. Set the radio’s basic conﬁguration with a Hand-Held Terminal (HHT) • Set the transmit frequency ( TX xxx.xxx ).• Set the receive frequency ( RX xxx.xxx ).• Set the network address ( ADDR xxx ).• 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. Verify proper operation by observing the LED display • Refer to Table 5 on page 14 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)2323RTU(DTE)45206DSR DSR6RXDTXDGNDRTSCTSTXDRXDGND4CTS5RTSDB-9 DB-25DB-9 to DB-25 ExampleDB-25 to DB-25 Example1145TRANSCEIVER(DCE)2323RTU(DTE)5207RXDTXDDCDGNDDSRRTSTXDRXDDCDGNDAs required for application51876CTSDSRRTSCTS864577GND GND8 8DCD DCDAs required for application

MDS 05-3624A01, Rev. A Installation and Operation Guide i TABLE OF CONTENTS 1.0 GENERAL....................................................................................1 1.1 Introduction ......................................................................................11.2 Differences Among Models ..............................................................11.3 Applications ......................................................................................2Point-to-Multipoint, Multiple Address Systems (MAS) ....................2Point-to-Point System .....................................................................3Switched Carrier Operation ............................................................4Single Frequency (Simplex) Operation...........................................41.4 Model Number Codes ......................................................................41.5 Accessories ......................................................................................5 2.0 GLOSSARY OF TERMS..............................................................5 3.0 INSTALLATION ............................................................................8 3.1 Installation Steps ..............................................................................83.2 Mounting the Transceiver Board .......................................................93.3 Mounting the Enclosed Transceiver ...............................................103.4 Antennas and Feedlines ................................................................10Feedlines ......................................................................................113.5 Power Connection ..........................................................................113.6 Data Interface Connections ............................................................123.7 Power Conservation .......................................................................12 4.0 OPERATION ..............................................................................13 4.1 LED Indicators ................................................................................14 5.0 TRANSCEIVER PROGRAMMING ............................................14 5.1 Hand-Held Terminal Connection & Startup ....................................155.2 Hand-Held Terminal Setup .............................................................165.3 Keyboard Commands .....................................................................17Entering Commands.....................................................................17Error Messages ............................................................................175.4 Detailed Command Descriptions ...................................................19ADDR [0–255] ..............................................................................19AMASK [0000 0000–FFFF FFFF] ................................................19BAUD [xxxxx abc] .........................................................................20CTS [0–255] .................................................................................20CTSHOLD [0–60000] ...................................................................21DEVICE [DCE | CTS KEY] ...........................................................21DKEY............................................................................................21INIT...............................................................................................22KEY ..............................................................................................22

ii Installation and Operation Guide MDS 05-3624A01, Rev. AOWM [XXX...] ...............................................................................22OWN [XXX...]................................................................................22PWR [L | M | H].............................................................................23RSSI and RSSI!............................................................................23RX [xxx.xxx]..................................................................................23RXTOT [NONE | 1–255] ...............................................................23SER ..............................................................................................24SREV............................................................................................24STAT .............................................................................................24TOT [1–255 | ON | OFF] ...............................................................24TX [xxx.xxx] ..................................................................................24 6.0 TROUBLESHOOTING ...............................................................25 6.1 LED Indicators ................................................................................256.2 Event Codes ...................................................................................25Checking for Alarms—STAT command.........................................25Major Alarms vs. Minor Alarms.....................................................26Event Code Deﬁnitions .................................................................26 7.0 TECHNICAL REFERENCE .......................................................28 7.1 OEM-L/ss Transceiver Speciﬁcations .............................................287.2 Bench Testing Setup ......................................................................297.3 Helical Filter Adjustment ................................................................307.4 Upgrading the Radio’s Software .....................................................31Using the Radio Software Upgrade Diskette ................................31Using Radio Conﬁguration Software.............................................327.5 dBm-Watts-Volts Conversion Chart ................................................33

MDS 05-3624A01, Rev. A Installation and Operation Guide iii Copyright Notice This Installation and Operation Guide and all software described herein are protected by copyright: ©2000 Microwave Data Systems , a divi-sion of Adaptive Broadband Corporation. All rights reserved.Microwave Data Systems reserves its right to correct any errors and omissions. Operational Safety Notices The radio equipment described in this guide uses radio frequency trans-mitters. Although the power level is low, the concentrated energy from a directional antenna may pose a health hazard. Do not allow people to come in close proximity to the front of the antenna when the transmitter is operating.This manual is intended to guide a professional installer to install, oper-ate and perform basic system maintenance on the described radio. ISO 9001 Registration Microwave Data Systems’ adherence to this internationally accepted quality system standard provides one of the strongest assurances of product and service quality available. MDS Quality Policy Statement We, the employees of Microwave Data Systems, are committed to achieving total customer satisfaction in everything we do. Total Customer Satisfaction in: • Conception, design, manufacture and marketing of our products.• Services and support we provide to our internal and external custom-ers. Total Customer Satisfaction Achieved Through: • Processes that are well documented and minimize variations.• Partnering with suppliers who are committed to providing quality and service.• Measuring our performance against customer expectations and indus-try leaders.• Commitment to continuous improvement and employee involvement.RF Exposure

iv Installation and Operation Guide MDS 05-3624A01, Rev. A 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 contact 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.

MDS 05-3624A01, Rev. A Installation and Operation Guide 1 1.0 GENERAL 1.1 Introduction This guide presents installation and operating instructions for the MDS OEM-L/ss family of digital radio transceivers. The radios can be pur-chased as compact, modular boards that can be completely integrated within remote terminal units (RTUs) and PLC equipment. They are also available packaged in their own enclosures.These transceivers (Figure 1) are data telemetry radios 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. They use microprocessor control technology to provide highly reliable communications, even under adverse conditions.MDS OEM-L/ss radios use continuous-phase frequency shift keying (CPFSK) modulation with root raised cosine filtering with 50% excess bandwidth. Domestic models employ a 4-level modem; ETSI models, a 2-level modem.The transceiver is designed for trouble-free operation with data equip-ment provided by many other manufacturers, including remote terminal units (RTUs), programmable logic controllers (PLCs), flow computers, lottery terminals, automatic teller machines, and others. NOTE: Some features may not be available on all radios, based on theoptions purchased and the applicable regulations for the region in which the radio will operate. 1.2 Differences Among Models Since there are more than 2 models, I have made this section more generic. The specific frequency coverages can be listed in the specifi-cations section. ---Van The OEM-L/ss models are very similar in appearance and functionality. The major differences are over-the-air modem speed and frequency cov-erage. Domestic models are capable of 9600 bps transmission over the air; ETSI models, 4800 bps. This does not affect the local DATA INTER-FACE port speed, however. All models accept asynchronous data between 1200 and 19200 bps. The frequency coverages are listed in the specifications. See “OEM-L/ss Transceiver Specifications” on page 28. NOTE: The frequency coverage cannot be set or changed by the user; it is set at the factory.Finally, there are some hardware and software differences among the OEM-L/ss models. The operating software is not interchangeable among MDS OEM-L/ss radios.

2 Installation and Operation Guide MDS 05-3624A01, Rev. A Where are the LEDs? I could not see any-thing that looked obvious. ---Van Invisible place holder Figure 1. Transceiver Connectors and Indicators 1.3 Applications Point-to-Multipoint, Multiple Address Systems (MAS) This 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.Often, a radio system consists of many widely separated remote radios. A point-to-multipoint or SCADA (Supervisory Control and Data Acqui-sition) system may be a new installation for automatic, remote moni-toring of gas wells, water tank levels, electric power distribution system control and measurement, etc.The radio system may replace a network of remote monitors currently linked to a central location via 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 phone line is quite high, radio is often used as an alternative communi-cation medium.LED INDICATORS (4)EXTERNALINTERFACECONNECTOR(DB-25) ANTENNACONNECTOR(BNC)POWER CONNECTOR(TIP/RING BARREL TYPE)

MDS 05-3624A01, Rev. A Installation and Operation Guide 3 Invisible place holder Figure 2. Typical MAS Point-to-Multipoint Network 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 LinkRTUL/ssREMOTEL/ssHOSTCOMPUTORRTUL/ssREMOTEL/ssHOSTCOMPUTORRTUL/ssREMOTE

4 Installation and Operation Guide MDS 05-3624A01, Rev. A Switched Carrier Operation NOTE: MDS OEM-L/ss radios do not support full-duplex operation.Switched Carrier operation is a half-duplex mode of operation where the master station transmitter is keyed to send data and unkeyed to receive. MDS OEM-L/ss radios operate in switched carrier mode and are keyed on data. 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. 1.4 Model Number Codes This section/figure needs to be updated.---Van The radio model number is printed on the end of the radio enclosure, and provides key information about how the radio was configured when it was shipped from the factory. See Figure 4 for an explanation of the model number characters. Invisible place holder Figure 4. MDS OEM-L/ss Model Number CodesTHIS INFORMATION IS SUBJECT TO CHANGE.DO NOT USE FOR PRODUCT ORDERING.2710A/DOPERATIONX= Base/RemoteMODEN= Non-redundantINPUT VOLTAGE1= 10.5 to 16 VDCMODEMA= 9600 BPSDIAGNOSTICS0= NONE1= Non-IntrusiveBANDWIDTH1= 12.5 kHz2= 25 kHzFEATURES0= FullAGENCYN= N/ASAFETYN= N/AMOUNTING BRACKETSA= StandardB= None5= 5 kHzD= 3200 BPS

MDS 05-3624A01, Rev. A Installation and Operation Guide 5 1.5 Accessories The transceiver can be used with one or more of the accessories listed in Table 1. Contact Microwave Data Systems for ordering information. 2.0 GLOSSARY OF TERMS If 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 will prove helpful in understanding the operation of the trans-ceiver. Antenna System Gain —A figure, normally expressed in dB, repre-senting 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. Table 1. MDS OEM-L/ss Optional Accessories Accessory Description MDS P/N Hand-Held TerminalKit (HHT) Terminal that plugs into the radio for programming, diagnostics & control. Includes carrying case and cable set.02-1501A01RTU Simulator Test unit that simulates data from a remote terminal unit. Comes with polling software that runs on a PC. Useful for testing radio operation.03-2512A01DB-9 to DB-25 adapter Used to connect a PC to the radio’s DATA INTERFACE port ??-????A??Radio Configuration Software Provides diagnostics of the transceiver (Windows-based PC required.) 03-3156A01

6 Installation and Operation Guide MDS 05-3624A01, Rev. A 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-L/ss 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. Equalization —The process of reducing the effects of amplitude, fre-quency or phase distortion with compensating networks. Fade Margin —The greatest tolerable reduction in average received signal strength that will be 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 to 30 dB is usually sufficient in most systems. Frame —A segment of data that adheres to a specific data protocol and contains definite start and end points. It provides a method of synchro-nizing transmissions. 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 transmis-sion 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 pur-pose 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 .

MDS 05-3624A01, Rev. A Installation and Operation Guide 7 Payload data —This is the application’s user communication data which is sent over the radio network. It is the transfer of payload data that is the primary purpose of the radio communications network. 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-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.RSSI—Received Signal Strength Indication. A measure, in dB, of the strength of the signal received by a radio from an antenna. The radio must be 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.Standing Wave Ratio—See SWR.Supervisory Control And Data Acquisition—See SCADA.SWR—Standing Wave Ratio. A parameter related to the ratio between forward transmitter power and the reflected power from the antenna system. As a general rule, reflected power should not exceed 10% of the forward power (≈ 2:1 SWR).

8 Installation and Operation Guide MDS 05-3624A01, Rev. A3.0 INSTALLATIONThere are three main requirements for installing the transceiver—ade-quate and stable primary power, a good antenna system, and the correct data connections between the transceiver and the data device. MDS OEM-L/ss radios are available as stand-alone boards or in small enclo-sures. Figure 5 shows the connections that are made to the stand-alone board.Invisible place holderFigure 5. Connections to the Stand-Alone Board3.1 Installation StepsBelow are the basic steps for installing the transceiver. In most 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 brackets supplied with the radio.2. Install the antenna and antenna feedline for the station. Preset direc-tional antennas in the desired direction.3. Measure and install the primary power for the radio.NOTE: Use the radio in negative ground systems only.EXTERNALINTERFACECONNECTOR(DB-25) ANTENNACONNECTOR(BNC)POWER CONNECTOR(TIP/RING BARREL TYPE)

MDS 05-3624A01, Rev. A Installation and Operation Guide 94. Set the radio conﬁguration. The transceiver is designed for quick installation with a minimum of software conﬁguration required in most cases. The selections that must be made or veriﬁed for new installations are:• Transmit frequency• Receive frequency• Network addressThe operating frequencies are not set at the factory unless they were 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 hand-held terminal (HHT) to the DATA INTERFACE con-nector. When the HHT beeps, 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 HHT reads PROGRAMMED OK to indicate successful entry.6. Disconnect the HHT from the DATA INTERFACE connector.7. 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 may require only the use of Pin 2 (transmit data—TXD), Pin 3 (Received Data—RXD) and Pin 7 (signal ground).Additional connections may be required for some installations. Refer to the complete list of pin functions provided in Table 4 on page 12.3.2 Mounting the Transceiver BoardThis is a placeholder for special mounting instructions of the stand-alone board, if necessary.ENTERENTERENTERENTER

10 Installation and Operation Guide MDS 05-3624A01, Rev. A3.3 Mounting the Enclosed TransceiverIs Section 3.3 to be retained in this ver-sion of the manual? ---VanFigure 6 shows the mounting dimensions of the transceiver.Invisible place holderFigure 6. Transceiver Mounting Dimensions3.4 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. At remote sites, a directional Yagi (Figure 7) or corner reflector antenna is gener-ally recommended to minimize interference to and from other users. Antennas of this type are available from several manufacturers.8.5"216 mm1.75"4.44 CM6.63"168 mm2.75"70 mm7.25"184 mmALTERNATEPOSITION5.625"143 mm2.25"57 mm2.0"50 mm

MDS 05-3624A01, Rev. A Installation and Operation Guide 11Invisible place holderFigure 7. Typical Yagi Antenna (mounted to mast)FeedlinesThe selection of antenna feedline is very important. Poor quality cables should be avoided as they will result in power losses that may reduce the range and reliability of the radio system.Table 2 shows the losses that will occur when using various lengths and types of cable at 200 MHz; Table 3, the losses at 400 MHz. Regardless of the type of cable used, it should be kept as short as possible to mini-mize signal loss.3.5 Power ConnectionThe transceiver can be operated from any well-filtered 10 to 30 Vdc power source. The power supply should be capable of providing at least 1 ampere of continuous current.Table 2. Length vs. Loss in Coaxial Cables at 200 MHzCable Type 3 Meters(10 Feet) 15 Meters(46 Feet) 30 Meters(91 Feet) 150 Meters(525 Feet)RG-8A/U 0.32 dB 1.6 dB 3.2 dB 16 dB1/2 inch HELIAX 0.10 dB 0.49 dB 0.98 dB 4.9 dB7/8 inch HELIAX 0.05 dB 0.27 dB 0.54 dB 2.7 dB1-1/4 inch HELIAX 0.04 dB 0.20 dB 0.40 dB 2.0 dB1-5/8 inch HELIAX 0.03 dB 0.17 dB 0.33 dB 1.65 dBTable 3. Length vs. Loss in Coaxial Cables at 400 MHzCable Type 10 Feet(3.05 Meters) 50 Feet(15.24 Meters) 100 Feet(30.48 Meters) 500 Feet(152.4 Meters)RG-8A/U 0.51dB 2.53 dB 5.07 dB 25.35 dB1/2 inch HELIAX 0.12 dB 0.76 dB 1.51 dB 7.55 dB7/8 inch HELIAX 0.08 dB 0.42 dB 0.83 dB 4.15 dB1-1/4 inch HELIAX 0.06 dB 0.31 dB 0.62 dB 3.10 dB1-5/8 inch HELIAX 0.05 dB 0.26 dB 0.52 dB 2.60 dB

12 Installation and Operation Guide MDS 05-3624A01, Rev. ANOTE: The radio is designed for use only in negative ground systems.3.6 Data Interface ConnectionsThe transceiver’s DATA INTERFACE connector is used to connect the transceiver to an external DTE data terminal that supports the EIA-232 (formally RS-232) format. The transceiver supports asynchronous data rates up to 19200 bps. The data rate at the DATA INTERFACE connector may differ from the data rate over the air.Table 4 lists each pin on the DATA INTERFACE connector and describes its function.Do 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 sig-naling, typical applications require the use of Pins 1 through 8 only.3.7 Power ConservationIn 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 removing power from the radio. When power is restored, the radio is ready to receive data within 75 millisec-onds.CAUTIONUSEONLY REQUIREDPINSTable 4. 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. Keys the transmitter when RTS is at logic high.5 OUT CTS—Clear-to-Send Output. Goes “high” after the programmed CTS delay time has elapsed (DCE) or keys an attached radio when RF data arrives (CTS KEY).6 OUT DSR—Data Set Ready. Provides a +6 Vdc DSR signal through a 2.5 kΩ resistor.7--Signal Ground. Connects to ground (negative supply potential) at radio’s PC board.8 OUT DCD—Data Carrier Detect. Goes “high” when the modem detects a data carrier from the master station.9 -- Do not connect—Reserved for future use.

MDS 05-3624A01, Rev. A Installation and Operation Guide 13Invisible place holder4.0 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 front panel LED status indicators for proper operation.If all parameters are correctly set, operation of the radio can be started by following these steps:1. Apply DC power to the transceiver.10 -- Do not connect—Reserved for future use.11 OUT Receive Audio Output. Connects to the audio input of an external (AFSK) modem. The output impedance is 600 Ω, and the level is factory set to suit most installations. Use Pin 7 for the modem’s return lead.12 -- Do not connect—Reserved for future use.13 -- Do not connect—Reserved for future use.14 -- Do not connect—Reserved for future use. 15 -- Do not connect—Reserved for future use.16 -- Do not connect—Reserved for future use. 17 -- Do not connect—Reserved for future use.18 IN/OUT Accessory Power. Unregulated Input/Output. Provides a source of input power for low current accessories. Excessive drain on this connection will trip self-resetting fuse F1 on the transceiver PC board. The voltage at this pin will match the input voltage to the transceiver.19 OUT 5.8 Vdc Regulated Output. Provides a source of regulated voltage at 100 mA for low power accessories.20 -- Do not connect—Reserved for future use.21 -- Do not connect—Reserved for future use.22 -- Do not connect—Reserved for future use.23 IN Auto-Open. A logic high (>4.0 volts) on this pin enables the DATA INTERFACE for normal data operation. A logic low (<0.5 volts) on this pin disables data operation and enables diagnostic operation.24 -- Do not connect—Reserved for future use.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 4. DATA INTERFACE Connector Pinouts (Continued)PinNumber Input/Output Pin Description

14 Installation and Operation Guide MDS 05-3624A01, Rev. A2. Observe the LED status panel for the proper indications (Table 5).3. If not done earlier, reﬁne the antenna heading of the station to maxi-mize the received signal strength (RSSI) from the master station.Use the RSSI command from an HHT connected to the radio’s DATA INTERFACE connector.—See Section 5.0, TRANSCEIVER PRO-GRAMMING. This can also be done with a DC voltmeter as described in Section 4.2, RSSI Measurement.4.1 LED IndicatorsTable 5 describes the function of each status LED.5.0 TRANSCEIVER PROGRAMMINGProgramming and control of the transceiver (administrative mode) is performed through the radio’s DATA INTERFACE connector with an MDS Hand-Held Terminal (MDS P/N 02-1501A01). This section contains a reference chart (Table 7) followed by detailed descriptions for each user command.NOTE: In addition to HHT control, Windows-based software is avail-able (MDS P/N 03-3156A01) to allow diagnostics andprogramming using a personal computer. An installationbooklet and on-line instructions are included with the soft-ware. Contact MDS for ordering information.PWR DCD TXD RXDTable 5. LED Status Indicators LED Name DescriptionPWR • 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 Flashing—Indicates the radio is receiving intermittent data frames.TXD An EIA-232 mark signal is being received at the DATA INTERFACE connector.RXD An EIA-232 mark signal is being sent out from the DATA INTERFACE connector.

MDS 05-3624A01, Rev. A Installation and Operation Guide 155.1 Hand-Held Terminal Connection & StartupThis section gives basic information for connecting and using the MDS Hand-Held Terminal. For more information about the terminal, refer also to the instructions included with each HHT kit.The steps below assume that the HHT has been configured for use with the transceiver (80 character screen display). If the HHT was previously used with a different model transceiver, or if its default settings have been changed, refer to Section 5.2, Hand-Held Terminal Setup for setup details.Follow these steps to connect the HHT:1. Connect the HHT’s coiled cord to the DATA INTERFACE (DB-25) connector on the radio as shown in Figure 8. Pin 23 of the HHT cable must be grounded to enable the diagnostic channel. (See Table 4.) This automatically places the radio into the control and programming mode.2. When the HHT is connected, it runs through a brief self-check, ending with a beep. After the beep, press to obtain the ready “>” prompt.I am guessing here about the look of the connector. If this is way off, I would like to look at the real thing during my next visit. ---VanInvisible place holderFigure 8. Hand-Held Terminal Connected to the TransceiverENTERZCTRLU+–K*F/AF1V,Q#)G(BF2SHIFT ESCW=R7M4H1CF3BKSPX0S8N5I2DF4SPACEYT9O63EF5ENTERJLP

16 Installation and Operation Guide MDS 05-3624A01, Rev. A5.2 Hand-Held Terminal SetupThe following is a set of instructions for re-initializing an HHT for use with the transceiver. These steps may be required if the HHT was previ-ously used with a different radio, or if the HHT default settings have been inadvertently altered.1. Plug the HHT into the DATA INTERFACE connector. Enable the setup mode by pressing the , and keys in sequence. The display shown in Figure 9 appears.Invisible place holderFigure 9. HHT Setup Display2. The ﬁrst of 15 menu items is displayed. Settings are reviewed by pressing the NEXT function controlled by the key. Parameter set-tings are changed by pressing the ROLL function controlled by the key.3. Set up the HHT as listed in Table 6.Table 6. HHT Operational Settings Parameter Setting Parameter SettingRe-init HT NO Scroll On 33rdBaud Rate 9600 Cursor ONComm bits 8,1,n CRLF for CR OFFParity Error OFF Self Test FASTKey Repeat OFF Key Beep ONEcho OFF Screen Size 80Shift Keys YES Menu Mode LONGCtl Chars PROCSSHIFT CTRL SPACEFF1FFFBCDEAEA

MDS 05-3624A01, Rev. A Installation and Operation Guide 175.3 Keyboard CommandsTable 7 is a reference chart of software commands for the transceiver. Programmable information is shown in brackets [ ] following the com-mand name. See Section 5.4, Detailed Command Descriptions for detailed command descriptions.Entering CommandsTo enter a command, type the command, followed by an key-stroke. For programming commands, the command is followed by and the appropriate information or values, then .Here are some additional points to remember when using the HHT:• Use the key to access numbers; press again to return to letter mode.• Use the key to edit information or commands entries.• The flashing square cursor ( ) indicates that letter mode is selected.• The flashing superscript rectangular cursor ( ) indicates that number mode is selected.Error MessagesListed below are some possible error messages that may be encountered when using the HHT: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 infor-mation.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.ENTERSPACE ENTERSHIFTESC/BKSP

18 Installation and Operation Guide MDS 05-3624A01, Rev. AACCESS 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 is a serious internal radio error. Contact MDS for assistance.Table 7. Command summary Command name Function ADDR [0–255]Details page 19Set or display the network address of the radio. AMASK [0000 0000–FFFF FFFF]Details page 19Set or display hex code identifying which events trigger an alarm. BAUD [xxxxx abc]Details page 20Set or display the DATA INTERFACE data rate and control bits. CTS [0–255]Details page 20Set or display the Clear-to-Send delay in milliseconds. CTSHOLD [0–60000]Details page 21Set or display the delay, in milliseconds, at the end of a CTS line response; CTS Key operation only. DEVICE [DCE | CTS KEY]Details page 21Set or display the device behavior of the radio. DKEYDetails page 21Dekey the radio (transmitter OFF). This is generally a radio test command. INITDetails page 22Set radio parameters to factory defaults. KEYDetails page 22Key the radio (transmitter ON). This is generally used for radio testing. OWM [XXX...]Details page 22Set or display the owner’s message. OWN [XXX...]Details page 22Set or display the owner’s name. PWR [L | M | H]Details page 23Set or display the transmit power setting. RSSI and RSSI!Details page 23Display the Received Signal Strength Indication. RX [xxx.xxx]Details page 23Set or display the receive frequency. RXTOT [NONE | 1–255]Details page 23Set or display the value of the receive time-out timer. SERDetails page 24Display the radio serial number. SREVDetails page 24Display the software revision level.

MDS 05-3624A01, Rev. A Installation and Operation Guide 195.4 Detailed Command DescriptionsThe only critical commands for most applications are transmit fre-quency (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 diagnos-tics on the radio. This section gives more detailed information for the user commands previously listed in Table 7.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 pro-grammed 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 fol-lowing the command name. The separation of values by pipes (|) indi-cates that you can enter one of the values in the list.ADDR [0–255]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.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 will 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 asso-ciated alarm as irrelevant when deciding whether or not to assert the alarm output status line. STATDetails page 24Display the current alarm status. TOT [1–255 | ON | OFF]Details page 24Set or display the time-out timer status and the timer delay in milliseconds. TX [xxx.xxx]Details page 24Set or display the transmit frequency.Table 7. Command summary (Continued)Command name Function

20 Installation and Operation Guide MDS 05-3624A01, Rev. AThus, an eight-digit hexadecimal number can classify up to 32 events as alarm triggers for the alarm output status line. See Table 8 on page 26 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 corre-sponding 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 encoded: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 asso-ciated 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 and the DTE can transmit the data. A CTS value of zero keys the radio and 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 sending data out the DATA INTERFACE port. A timer value of zero means that data will be sent out the data port without imposing a key-up delay. (Other delays may be present, based on selected radio operating parameters.)

MDS 05-3624A01, Rev. A Installation and Operation Guide 21CTSHOLD [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 following the transmission of the last character 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 character is transmitted.For 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. Keying is 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 transmitted.If CTS KEY is selected, the radio is assumed to be controlling another radio. The RTS line is ignored and the CTS line is used as a keyline con-trol for the other radio. 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. (This gives the other radio time to key.)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.

22 Installation and Operation Guide MDS 05-3624A01, Rev. AINITThe INIT command is used to re-initialize the radio’s operating parame-ters 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•PWR is set to H [+33 dBm (2 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 max-imum 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.ENTERENTERENTERENTER

MDS 05-3624A01, Rev. A Installation and Operation Guide 23PWR [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 set-ting 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 determined by factory calibration. Typically they are:L = 20 dBm (100 mW)M = 30 dBm (1 W)H = 33 dBm (2 W)RSSI 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 the diagnostic port to enter an RSSI update mode. The port displays an updated RSSI output line at intervals of approximately 1 second. Press to terminate the display.The RSSI! command displays a one-time reading of the RSSI at the diag-nostic port.NOTE: The RSSI reading is valid only if the unit has been properlycalibrated.RX [xxx.xxx]It was unclear from the markup whether there should be something or nothing in the second para-graph under RX.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 HHT displays the message INCORRECT ENTRY.There is no factory default. RX is factory set to customer order.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.ENTER

24 Installation and Operation Guide MDS 05-3624A01, Rev. ASERThis command displays the radio’s serial number as recorded at the fac-tory.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 HHT display.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. Detailed descriptions of event codes are provided in Table 8 on page 26.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 hap-pens, 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]It was unclear from the markup whether there should be something or nothing in the second para-graph under TX.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 HHT displays the message INCORRECT ENTRY.There is no factory default. TX is factory set to customer order.ENTER

MDS 05-3624A01, Rev. A Installation and Operation Guide 256.0 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. The radio contains an inter-nal self-resetting fuse (4A). Remove and re-apply primary power to reset.• 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 will be degraded. • Proper programming of the transceiver’s operating parameters (see Section 5.0, TRANSCEIVER PROGRAMMING).• The correct interface between the transceiver and the connected data equipment (correct cable wiring, proper data format, timing, etc.)6.1 LED IndicatorsThe LED status indicators are an important troubleshooting tool and should be checked whenever a problem is suspected. Table 5 on page 14 describes the function of each status LED.6.2 Event CodesWhen an alarm condition exists, the transceiver creates a code that can be read on an HHT connected to the DATA INTERFACE port. These codes can be very helpful in resolving many system difficulties. Refer to Table 8 for a definition of the event codes.Checking for Alarms—STAT commandTo check for alarms, enter STAT on the HHT. If no alarms exist, the mes-sage NO ALARMS PRESENT appears at the top of the display (Figure 10).

26 Installation and Operation Guide MDS 05-3624A01, Rev. AInvisible place holderFigure 10. HHT Display in Response to STAT CommandIf 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 .Major Alarms vs. Minor AlarmsMajor Alarms—report serious conditions that generally indicate a hard-ware failure, or other abnormal conditions that will 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 will not prevent transceiver operation. These include out-of-tolerance condi-tions, baud rate mismatches, etc. The cause of these alarms should be investigated and corrected to prevent eventual system failure.Event Code DefinitionsTable 8 contains a listing of all event codes that may be reported by the transceiver.ENTERTable 8. 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 Calibrated

MDS 05-3624A01, Rev. A Installation and Operation Guide 2709 -- -- 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. --Table 8. Event Codes (Continued)Event Code Hex Value Event Class Description STATUS Message

28 Installation and Operation Guide MDS 05-3624A01, Rev. A7.0 TECHNICAL REFERENCE7.1 OEM-L/ss Transceiver SpecificationsThis section con-forms with the specs literature Kevin sent me. Is there anything to add for this manual? ---VanMODELSMDS OEM-L2: Licensed 220 MHz TransceiverMDS OEM-L4: Licensed 400 MHz TransceiverMDS OEM-L9: Licensed 900 MHz TransceiverMDS OEM-SS9: Frequency Hopping Spread Spectrum900 MHz TransceiverENVIRONMENTALTemperature Range: –30 to 60 degrees CHumidity: 95% at 40 degrees CBoard Dimensions: 0.65″ H x 4.60″ W x 4.25″ D2 cm H x 11.7 cm W x 10.7 cm DWeight: 0.2 pounds0.09 kilogramsRF Connector: BNCTRANSMITTERPower Output: 2 watts (+33 dBm)[1 watt (+30 dBm) for FHSS version]Output Impedance: 50 ΩFrequency Stability: 1.5 ppmTransmitter Duty Cycle: 50%RECEIVERType: Double conversion superheterodyneSensitivity: -108 dBm @ 1 x 10-6 BERAdjacent Channel Performance: 60 dB EIADATA CHARACTERISTICSThroughput: 9600 bpsThe specs literature Kevin sent me does not include 19200 bps, though it is in the specs document I was given. Has this changed? ---VanPort Speed: 1200, 2400, 4800, 9600, 19200 bps programmableParity: 7/8 bit with or without Parity ASYNCModem: Digital CPFSKDIAGNOSTICSSelf Test: YesLocal RS-232 RSSI and Setup: Yes4 LED Display: RS, TX, CD, and PWRPRIMARY POWERPlease verify primary power specs.Voltage: 10 to 30 VdcTX Supply Current: 1.5 amps max

MDS 05-3624A01, Rev. A Installation and Operation Guide 29RX Supply Current: Operation—< 60 mA (nominal)Standby—powered off (recovery time to receive ≤ 75 ms)Fuse: 4 amp polyfuse, self-resetting, internal(remove preimary power to reset)Reverse Polarity Protection: Diode across primary input7.2 Bench Testing SetupFigure 11 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.The RTU simulator shown in the test setup (MDS Part No. 03-2512A01) 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 will depend onthe number of units being tested and the desired signal strength(RSSI) at each transceiver during the test. In no case should asignal greater than –50 dBm be applied to any transceiver inthe test setup.Invisible place holderFigure 11. Typical setup for bench testing of radiosL/ssL/ssL/ssMASTER STATIONCOMPUTER RUNNING MDSPOLL.EXE PROGRAML/ssREMOTEREMOTEREMOTEREMOTENON-RADIATING ATTENUATOR•Install on any unused divider ports•5W minimum ratingPOWER DIVIDERPOWER ATTENUATORS•Fixed or adjustable•5W minimum ratingRTU SIMULATORSMDS P/N 03-2512A01

30 Installation and Operation Guide MDS 05-3624A01, Rev. A7.3 Helical Filter AdjustmentIf the operating frequency of the radio is changed significantly, the helical filters should be adjusted for maximum received signal strength (RSSI). To adjust the filters, proceed as follows:1. For enclosed units, remove the top cover from the transceiver by loosening the four screws and lifting straight up.2. Locate the helical ﬁlters on the PC board. See Figure 12.3. Apply a steady signal to the radio at the programmed receive fre-quency (–80 dBm level recommended; no stronger than –60 dBm). This can be done with a signal generator or an over-the-air signal.4. Measure the radio’s RSSI using one of the following methods:• With an HHT (See Section 5.0, TRANSCEIVER PROGRAM-MING on page 14).• With MDS Radio Configuration Software (See Section 7.4, Upgrading the Radio’s Software on page 31).•With a voltmeter connected to Pin 21 of the DATA INTERFACE connector (See Section 4.2, RSSI Measurement on page 16).5. With a non-metallic adjustment tool, adjust each section of the helical ﬁlter for maximum RSSI. Re-install the cover to the trans-ceiver.I am sure this figure needs changing. Can I call the helical adjustments out from the front cover image? Or do you want a diagram? ---VanInvisible place holderFigure 12. Helical Filter LocationFRONT PANELOF RADIOJ301U104U101U202HELICALADJUSTMENTSU203SHIELDCOVER

$MDS 05-3624A01, Rev. A Installation and Operation Guide 317.4 Upgrading the Radio’s SoftwareFrom time to time, new product features or software maintenance files may become available from MDS. This section describes the steps nec-essary to install new software into the transceiver using a PC connected to the radio’s DATA INTERFACE port.Upgrade software can be obtained in a number of ways. The MDS Web site at www.microwavedata.com contains an FTP area with software files for several radio models. You can browse the listings to see if there are files pertaining to your particular model. There is no charge for this service.In addition, you can also contact MDS to request radio software. Soft-ware files can be sent to you via e-mail or on a 3.5” diskette. There may be a nominal charge for the software depending on the nature of the upgrade.NOTE: Software upgrades are distributed as ASCII files with a “.S28”extension. These files use the Motorola S-record format. Using the Radio Software Upgrade DisketteA software upgrade diskette may be purchased from MDS to add new product features to the radio. The upgrade kit includes a diskette (MDS P/N 06-3501A01) with the most current radio software and an instruc-tion booklet. Contact MDS for ordering information. When calling, please have the serial number(s) available for the radio(s) that you wish to upgrade.The upgrade software can be run on an IBM-compatible computer con-nected to the radio’s DATA INTERFACE port via a DB-9 to DB-25 adapter (MDS P/N ??-????A??). If desired, an adapter cable may be constructed from scratch using the information shown in Figure 13.Please verify the dia-gram. ---VanInvisible place holderFigure 13. DB-25 to DB-9 Adapter CableTo initiate the upgrade, insert the upgrade diskette in Drive A:. Set the working directory to A: (example: from a DOS prompt type A:\). Next, type UPGRADE and press the ENTER key. (If you have the radio connected via the Com2 serial port, type UPGRADE-2 instead.) The upgrade soft-ware will normally run automatically without any further prompts.RXDTXDGND235DB-9 FEMALE(TO COMPUTER)TXDRXDGND237DB-25 MALE(TO RADIO)$

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