Secure, Long Range Data Communications Covering Units Operating in x710 Mode with Firmware Version 4.x MDS 05-4670A01, Rev.
Need Quick-Start instructions for this product? Please refer to publication 05-4669A01. All GE MDS user guides are available online at www.gemds.
TABLE OF CONTENTS RF Safety Notice (English and French) .......................................................................................... iv FCC Part 15 Notice......................................................................................................................... iv Industry Canada Notice .................................................................................................................. iv 1.0 INTRODUCTION ............................................................
Entering Commands ......................................................................................................................21 6.2 Detailed Command Descriptions .................................................................................................24 AK ..................................................................................................................................................25 ALARM..................................................................................
RXTOT [NONE, 1-1440] ................................................................................................................36 SAVECONFIG................................................................................................................................36 SCD [0-255] ...................................................................................................................................36 SER......................................................................................
RF Safety Notice (English and French) RF Exposure l'exposition aux RF Concentrated energy from a directional antenna may pose a health hazard to humans. Do not allow people to come closer to the antenna than the distances listed in the table below when the transmitter is operating. More information on RF exposure can be found online at the following web site: www.fcc.gov/oet/info/documents/bulletins. Concentré d'énergie à partir d'une antenne directionnelle peut poser un risque pour la santé humaine.
Servicing Precautions When servicing energized equipment, be sure to wear appropriate Personal Protective Equipment (PPE). During internal service, situations could arise where objects accidentally contact or short circuit components and the appropriate PPE would alleviate or decrease the severity of potential injury. When servicing radios, all workplace regulations and other applicable standards for live electrical work should be followed to ensure personal safety.
CSA Conditions of Approval: The transceiver is not acceptable as a stand-alone unit for use in the hazardous 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: The transceiver must be mounted within a separate enclosure which is suitable for the intended application.
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. MDS 05-4670A01, Rev.
viii SD Series Reference Manual (x710 Mode) MDS 05-4670A01, Rev.
1.0 INTRODUCTION This Reference Manual is one of two books provided for users of the MDS SD Series Transceiver (Figure 1) operating in x710 Mode. It contains an overview of common applications, installation planning data, technical specifications, troubleshooting, and a listing of software commands. This manual should be available to technical personnel who perform network design, configuration, and troubleshooting of the equipment. A companion Instruction Sheet is also available (Part no. 05-4669A01).
1.2 Electronic Manuals All SD Series manuals are available in printed or electronic form. Download electronic manuals from our web site at www.gemds.com. The web site also contains links to Application Bulletins and other product information. 2 SD Series Reference Manual (x710 Mode) MDS 05-4670A01, Rev.
2.0 PRODUCT DESCRIPTION The SD Transceiver is a software-configurable, industrial radio for use in licensed data acquisition networks. It can be interfaced with a variety of data control equipment including remote terminal units (RTUs), programmable logic controllers (PLCs), flow computers, and similar devices. Data interface connections can be made for both serial (RS-232/RS-485) and local Ethernet protocols.
2.2 Key Product Features The transceiver is designed to meet the demanding needs of today’s industrial wireless networks in a compact, rugged package. It offers an array of features in one hardware platform: • Ethernet & serial interfaces—ideal for migration to IP networks • Dual serial functionality (RS-232 and RS-485) • Software configurable using the built-in interface, and Web management—no manual controls or adjustments. Supports Serial, Telnet, or web-based management.
2.4 Operating Modes and Applicable Manuals SD Transceivers can be configured to operate in any one of three modes: • x710 Mode—This mode provides direct, drop-in compatibility with MDS x710 (4710 or 9710) transceivers, and uses the same core command set as these radios. It is ideal for use in systems containing a mix of newer SD radios and legacy MDS x710 units. This manual covers x710 Mode radios.
2.5 Accessories and Spares Table 1 lists common accessories and spare items for the transceiver. GE MDS also offers an Accessories Selection Guide listing additional items that can be used with the product. Contact your factory representative or visit www.gemds.com to obtain a copy of the guide. Table 1.
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, wireless technology is often used as a cost-effective alternative. Invisible place holder REMOTE RADIO RTU RTU REMOTE RADIO RTU REMOTE RADIO RTU MASTER STATION REMOTE RADIO OR: SDA-Augmented Master Station HOST SYSTEM Figure 4.
Continuously-Keyed versus Switched-Carrier Operation The keying behavior of the master station can be used to describe the operation of an MAS system. Continuously-Keyed operation means the master station transmitter is always keyed and an RF carrier is always present, even when there is no data to send. The master station is always transmitting and receiving simultaneously. Different frequencies must be used for transmit and receive. This is the method used in many MAS systems, as is shown in Figure 4.
Figure 6. Typical Remote Station Arrangement 4.2 Mounting Options The transceiver is normally provided with flat mounting brackets attached to the bottom of the radio as shown in Figure 7. An optional 35 mm DIN rail mounting bracket is also available. See “Optional DIN Rail Mounting” on page 10. 2.75˝ (7 cm) Invisible place holder 6.675˝ (16.95 cm) Figure 7. Mounting Bracket Dimensions MDS 05-4670A01, Rev.
NOTE: To prevent moisture from entering the radio, do not mount the case with the cable connectors pointing up. Also, dress all cables to prevent moisture from running along the cables and into the radio. Transceiver dimensions are shown in Figure 8. Figure 8. SD Transceiver Dimensions Optional DIN Rail Mounting The unit can be mounted with an optional 35 mm DIN Rail Mounting Bracket Kit (Part No. 03-4125A04). Equipment cabinets and racks of modern design often employ this type of mounting.
4.3 Antennas and Feedlines Antennas The transceiver can be used with a number of antennas. The exact style depends on the physical size and layout of your radio system. A directional Yagi (Figure 10) or corner reflector antenna is generally recommended at remote sites to minimize interference to and from other users. Antennas of this type are available from several manufacturers, including GE MDS. Contact your factory representative for details. Invisible place holder Figure 10.
Table 3. Signal Loss in Coaxial Cables (at 400 MHz) 10 Feet 50 Feet 100 Feet 200 Feet (3.05 Meters) (15.24 Meters) (30.48 Meters) (60.96 Meters) RG-8A/U 0.51 dB 2.53 dB 5.07 dB 10.14 dB 1/2 inch HELIAX 0.12 dB 0.76 dB 1.51 dB 3.02 dB 7/8 inch HELIAX 0.08 dB 0.42 dB 0.83 dB 1.66 dB 1-1/4 inch HELIAX 0.06 dB 0.31 dB 0.62 dB 1.24 dB 1-5/8 inch HELIAX 0.05 dB 0.26 dB 0.52 dB 1.04 dB Cable Type Table 4. Length vs.
4.5 Grounding Considerations To minimize the chance of damage to the transceiver and connected equipment, a safety ground (NEC Class 2 compliant) is recommended which bonds the antenna system, transceiver, power supply, and connected data equipment to a single-point ground, keeping all ground leads as short as possible. Normally, the transceiver is adequately grounded if the supplied flat mounting brackets are used to mount the radio to a well-grounded metal surface.
Invisible place holder > RXD 2 RXD DB-9 MALE (RADIO SIDE) 3 TXD < 5 GND 2 TXD 3 DB-9 FEMALE (COMPUTER) GND 5 Figure 13. COM1 Wiring to Computer for Management Table 5. COM1 Pin Descriptions Pin Number Input/ Output 1 -- 2 OUT RXD (Received Data)—Supplies received data to the connected device. 3 IN TXD (Transmitted Data)—Accepts TX data from the connected device. 4 -- No function 5 -- Ground—Connects to ground (negative supply potential) on chassis.
4.7 COM2 (Data) Connections The COM2 port (Figure 14) is used to connect the radio to an external DTE telemetry device supporting the EIA/RS-232 or EIA/RS-485 (balanced) format, depending on how the radio is configured. Typically, a straight-through DB-9 cable is used to connect to COM2. The radio supports data rates of 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps (asynchronous data only). The following data formats are supported: Table 6.
Table 7. COM2 Pin Descriptions—RS/EIA-232 Mode Pin Input/ Number Output Pin Descriptions— RS/EIA-422/485 Mode Pin Description 1 OUT DCD (Data Carrier Detect/Link)—A high (asserted) indicates signal received. 2 OUT RXD (Received Data)—Supplies received data to the connected device. 3 IN TXD (Transmitted Data)—Accepts TX data from the connected device. 4 IN Sleep Mode Input—Grounding this pin places the radio in a low power consumption mode.
COM2 PORT NOTES: • RXD+ / RXB and RXD– / RXA are data sent to the radio to be transmitted • RXD+ / RXB is positive with respect to RXD– / RXA when the line input is a “0” • TXD+ / TXB and TXD– / TXA are data received by the radio and transmitted • TXD+ / TXB is positive with respect to the TXD– / TXA when the line output is a “0” Invisible place holder RXD 3 RXD + RXD + 7 TXD TXD + 8 TXD + TXD 2 RXD/TXD RXD 3 RXD + 7 RXD+/TXD+ TXD + 8 EXTERNAL DEVICE RXD RADIO DATA CONNECTOR TXD 2
5.0 STEP-BY-STEP INSTALLATION In most cases, the steps given here are sufficient to install the transceiver. Refer to “INSTALLATION PLANNING” on Page 8 for additional details. 1. Mount the transceiver. Attach the mounting brackets to the bottom of the transceiver case (if not already attached), using the four 6-32 x 1/4 inch (6 mm) screws supplied. Mounting bracket dimensions are shown in Figure 7 on page 9. Secure the brackets to a flat, grounded surface.
5.1 Initial Startup & Checkout In-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 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. 2. Observe the LED status panel for proper indications (Table 10). 3.
Serial vs. Telnet Access, and the Device Manager There are three methods available to communicate with the transceiver for configuration and management purposes: Serial (COM1 DB9 connector), Telnet (ETHERNET RJ-45 connector), and the web-based Device Manager. Both serial and telnet present identical screens, but the method of access is different for each.
3. Press the ENTER key several times at half-second intervals to choose and select the correct baud rate. This will result in the > prompt. Invisible place holder Transceiver PC Running Terminal Session DB-9M to COM1 Port Figure 17. PC Connection to Transceiver NOTE: TX and RX frequencies might not be set when the radio is shipped from the factory, depending on ordering options. If frequencies have not been set, the PWR LED will flash, indicating an alarm condition.
Table 11. Command Summary (Continued) Command name 22 Function ASENSE [HI, LO] Details Page 25 Set/display the state of the alarm output signal to ACTIVE HI or ACTIVE LO. AUDIO [ON, OFF] Details Page 26 Set/display the receive audio monitor mode for modems. BAUD [xxxxx abc] Details Page 26 Set/display the DATA INTERFACE data rate and format. BIN [DATA, CLEAR] Details Page 26 Display or clear data counters. BOOT Details Page 26 Used to initiate a software reboot.
Table 11. Command Summary (Continued) Command name MDS 05-4670A01, Rev. E Function INIT [P-20] Details Page 30 Configure radio for service within a P-20 Protected Network Chassis. IPCONFIG Details Page 31 Ethernet interface configuration. KEY Details Page 31 Key the radio (transmitter ON). This is generally a radio test command. MENU Details Page 31 Activates the radio’s menu-based program (if supported). MODEL1 Details Page 31 Shows configuration order entry string associated with the radio.
Table 11. Command Summary (Continued) Command name Function RXTOL [NORMAL or CUSTOM] Details Page 36 Set/display the custom receive tolerance to accommodate issues experienced with some x790 masters. RXTOT [NONE, 1-1440] Details Page 36 Set/display the value of the receive time-out timer. SAVECONFIG Details Page 36 Saves a user configuration. SCD [0-255] Details Page 36 Set/display the Soft-Carrier Dekey delay in milliseconds. SER Details Page 36 Display the radio serial number.
In many cases, the commands shown here can be used in two ways: • Type only the command name to view the currently programmed data. • Set or change the existing data by typing the command, followed by a space, and then the desired entry. In the list below, allowable programming variables, if any, are shown in brackets following the command name.
AUDIO [ON, OFF] Audio Monitor/ Orderwire Status Used to set or display Audio Monitor/Orderwire functionality (on or off). If AUDIO ON is selected, the radio’s transmit functionality will switch to analog whenever PTT is asserted. BAUD [xxxxx abc] Data Interface Port Baud Rate This command sets (or displays) the communication attributes for the DATA INTERFACE port (COM2). It has no effect on the COM1 management port. The first parameter (xxxxx) is baud rate.
If data buffering is ON, the radio operates in seamless mode. Data bytes are sent over the air as quickly as possible, but the receiver buffers (stores) the data until enough bytes have arrived to cover worst-case gaps in transmission. This mode of operation is required for protocols such as MODBUS™ that do not allow gaps in their data transmission. NOTE: Seamless mode (BUFF ON) is intended only for applications where the transmitter’s baud rate is greater than or equal to the receiver’s baud rate.
DATAKEY [ON, OFF] Key on Data Activity The DATAKEY command enables or disables the ability of the radio to key the transmitter as data is received at the DATA INTERFACE connector. Asserting RTS keys the radio regardless of this command setting. If DATAKEY is set to ON, the radio will key when a full data-character is received at the transceiver’s DATA INTERFACE connector. If DATAKEY is set to OFF, the radio needs to be keyed by asserting RTS.
NOTE: The radio is configured by default to be in DLINK mode. The COM1 port automatically determines the connected baud rate (within the range of 1200–115200 bps). Enter a series of Return Key presses about a half second apart until the > prompt appears. This indicates that the radio is ready to receive commands. DTYPE [NODE/ROOT] Unit’s Diagnostics Type This command establishes the local radio as a root radio or node radio for network-wide diagnostics.
INIT Initialize EEPROM Defaults The INIT command is used to re-initialize the radio’s operating parameters to the factory defaults. This can be helpful when trying to resolve configuration problems that might have resulted from the entry of one or more improper command settings. If you are unsure of which command setting caused the problem, this command allows you to get back to a known working state.
IPCONFIG Ethernet Configuration Ethernet interface configuration. This command is used to display or change the configuration of the Ethernet interface. The command can be used in several ways: • • alone displays all current network settings. IPCONFIG DHCP [ON/OFF] is used to switch between DHCP and static addressing. • IPCONFIG IP [ipaddr] is used to set a static IP address. • IPCONFIG NET [netmask] and IPCONFIG GW [Gateway] are used to set subnet mask and gateway, respectively.
Table 12. Modem Selection vs. Speed, Bandwidth & Sensitivity Modem Type Selection Over-the-air Speed (bps) Modem 4800F 4800 6.25 -108 dBm Modem 9600B1 9600 12.5 -106 dBm Modem 4800B1 4800 12.5 -110 dBm Modem BELL1 1200 12.5 -110 dBm Modem V23 1200 12.5 -110 dBm 19200 12.5 -100 dBm 19200 12.5 -96 dBm Modem 9600N 9600 6.25 -98 dBm Modem 19200 19200 25.0 -105 dBm Modem 38400N 38400 25.0 -99 dBm Modem 650004 65000 50.
When the transceiver is used to replace an existing MDS x710 radio, it is important to verify that the modem selection is compatible with the unit replaced. Table 13 lists SD modem type selections and the compatible x710 models they can be used with. Table 13.
PORT [RS232, RS485] COM2 Settings Set or show COM2 data port interface settings. Push-to-Talk Delay PTT [0–255] This command sets or shows the key-up delay in milliseconds. This timer specifies how long to wait after the radio receives a key signal, before actually keying the radio. Push-to-Talk Configuration PTTSIG [OFF, LOW, HI] Used to set or show the configuration of the push-to-talk signal. This signal is used for analog operation.
NOTE: The RSSI samples the incoming signal for one to two seconds before providing an average reading to the connected PC. RTSKEY [ON, OFF] RTS Keying Behavior Used to set/display how the radio responds to RTS keying. The default setting is RTSKEY OFF. RTSKEY ON causes the radio to respond to RTS by keying the transmitter. When RTSKEY OFF is selected, key-on-RTS is suppressed.
RX Tolerance RXTOL [NORMAL or CUSTOM] The RXTOL command allows custom configuration of the receive tolerance, to improve performance with legacy radios (x790, x310, and so on). RXTOT [NONE, 1-1440] Loss of RX Data Alarm Time The RXTOT command selects or shows 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 shows the timer value in minutes.
The SNR is an indication of the received signal quality. A value of 10 dB represents a very poor signal. A value of 24 dB represents a very good signal. When the SNR command is used, it causes the DIAG. port to enter an update mode, and the signal-to-noise ratio is updated and redisplayed every 2 seconds. The SNR continuously updates until the ENTER key is pressed. SPECTRUM [xxx.xx] Internal Spectrum Analyzer Activates the built-in spectrum analyzer tool (see Figure 18) that can be shown on a connected PC.
STAT Alarm Status This command shows the current alarm status of the transceiver. If no alarms exist, the message NO ALARMS PRESENT appears. If an alarm does exist, a two-digit code (00–31) is displayed and the alarm is identified as “Major” or “Minor.” A brief description of the alarm code is also given. If more than one alarm exists, the word MORE appears at the bottom of the screen, and additional alarms are viewed by pressing the ENTER key.
TOT [1-255, ON, OFF] TX Timeout-Timer This command sets or shows the transmitter Time-out Timer value (1–255 seconds), as well as the timer status (ON or OFF). 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. The default timer value is 30 seconds. TX [xxx.
7.0 TROUBLESHOOTING Successful 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 might be compromised. It is good practice to start by checking the simple things.
Major Alarms vs. Minor Alarms Major Alarms (1-16)—report serious conditions that generally indicate a hardware failure, or other abnormal condition that will prevent (or seriously hamper) further operation of the transceiver. Major alarms generally indicate the need for factory repair. Contact your Technical Service representative for further assistance. Minor Alarms (17-32)—report conditions that, under most circumstances, will not prevent transceiver operation.
Table 14. Event Codes (Continued) Event Code 42 Event Class Description 64 Minor A socket operation failed. 70 Minor AP not available. 41 Status Forced restart of Ethernet interface. 43 Status Reprogramming in progress. 44 Inform Firmware update successful. 45 Inform Reprogramming aborted. 46 Inform Remote rebooted. SD Series Reference Manual (x710 Mode) MDS 05-4670A01, Rev.
8.0 TECHNICAL REFERENCE 8.
Duty Cycle: Variable up to 100%, dependent on application. Continuous key operation not recommended.
8.2 Performing Network-Wide Remote Diagnostics Diagnostics data from a remote radio can be obtained by connecting a laptop or personal computer running compatible NMS software, such as Element Manager or InSite,to any radio in the network. Figure 19 shows a sample arrangement for performing network-wide remote diagnostics.
1. Program one radio in the network as the root radio by entering the DTYPE ROOT command at the radio. 2. At the root radio, use the DLINK ON and DLINK [baud rate] commands to configure the diagnostic link protocol on the Management Port. 3. Program all other radios in the network as nodes by entering the DTYPE NODE command at each radio. 4. Use the DLINK ON and DLINK [baud rate] commands to configure the diagnostic link protocol on the Management Port of each node radio. 5.
Physical Interface The physical interface for analog operation utilizes pins on the radio’s COM1 (management) connector. This connector is multiplexed with the serial data lines used for software commands.
is selected followed by MODEM NONE, analog operation conforms to the channel constraints for a 12.5 kHz ETSI-compliant channel. Table 15 defines the relationship between digital modem selection and analog operation. MODEM 9600M Table 15. Relationship Between Digital Modem Selection and Analog Operation Command Command Agency Compliance Analog Chan. Size Peak Deviation MODEM 19200 followed by... MODEM NONE FCC/IC 25.0KHz 5.0 kHz MODEM 9600 followed by... MODEM NONE FCC/IC 12.5KHz 2.
Three methods can be used to load new firmware into the radio: Web reprogramming, TFTP, and Serial Transfer. Firmware reprogramming is best handled using the web-based Device Manager. Instructions for these methods of transfer are given below, beginning with Web programming. Web Method Determining Current Firmware Version This screen shows Bootloader version information and indicates which firmware image (1 or 2) is currently active, as well as the firmware version of each image.
TFTP Method What You Will Need To install firmware by TFTP, you will need: 1. A valid firmware file (see web address above). This will be a file with a .mpk extension. 2. A PC equipped with Telnet, and a TFTP server running on the same computer where the .mpk file is located (a Windows-based TFTP server can be downloaded from the GE MDS Web site at: www.gemds.com/Resources/TechnicalSupport). 3. The IP address of the PC running the TFTP server.
Invisible place holder REMOTE PC W/FIRMWARE FILE TFTP SERVER ETHERNET PORT HUB/LAN/WAN/MAN TCP/IP IP ADDRESS: w.x.y.z TRANSCEIVER TO LAN PORT INITIATE UPLOAD FROM HERE Figure 21. Firmware Upgrade Setup—Option 2 (TFTP Server and Firmware File Must Reside on Same Computer) Upgrade Procedure (TFTP) To load a new firmware file (filename.mpk) into the transceiver via TFTP, follow these steps: 1.
4. Use the tftp command to configure the IP host and file to program. For example: >tftp host 10.4.147.63 >tftp file SDx-3_0_0 5. Enter tftp get to begin reprogramming. The file is loaded into the radio’s inactive image. A series of progress messages display every few seconds indicating the reprogramming status, followed by Reprogramming Complete when the process is finished. 6. Reboot the radio to the other image using the boot other command.
Invisible place holder Transceiver PC Running Terminal Session DB-9M to COM1 Port Figure 23. PC Connection to Transceiver (Serial) Follow the steps below for serial transfer upgrade. NOTE: Serial reprogramming takes several minutes at 115200 bps baud rate (the recommended speed), but reprogramming is possible at lower baud rates. 1.
NOTE: If a firmware installation fails, the radio is left with the original active image intact, and the inactive image will be unusable. Reprogramming should be attempted again. Error Messages During File Transfers It is possible to encounter errors during a file transfer. In most cases errors can be quickly corrected by referring to Table 16. Table 16. Common Errors During TFTP Transfer MDS 05-4670A01, Rev.
8.6 dBm-Watts-Volts Conversion Chart Table 17 is provided as a convenience for determining the equivalent wattage or voltage of an RF power expressed in dBm. Table 17. dBm-Watts-Volts Conversion—for 50 Ohm Systems MDS 05-4670A01, Rev. E dBm V Po dBm V Po dBm mV +53 +50 +49 +48 +47 +46 +45 +44 +43 +42 +41 +40 +39 +38 +37 +36 +35 +34 +33 +32 +31 +30 +29 +28 +27 +26 +25 +24 +23 +22 +21 +20 +19 +18 +17 +16 +15 +14 +13 +12 +11 +10 +9 +8 +7 +6 +5 +4 +3 +2 +1 200W 100W 80W 64W 50W 40W 32W 25W 20W 16W 12.
9.0 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 transceiver. Active Messaging—This is a mode of diagnostic gathering that may interrupt SCADA system polling communications (contrast with passive messaging).
DSP—Digital Signal Processing. The transceiver’s DSP is the core operating unit of the transceiver through which nearly all functions depend. 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, frequency or phase distortion with compensating networks. Fade Margin—The greatest tolerable reduction in average received signal strength to be expected under most conditions.
Passive messaging—This is a mode of diagnostic gathering that does not interrupt SCADA system polling communications. Diagnostic data is collected non-intrusively over a period of time; polling messages are carried with SCADA system data (contrast with active messaging). Payload data—This is the application’s user communication data which is sent over the radio network.
NOTES MDS 05-4670A01, Rev.
60 SD Series Reference Manual (x710 Mode) MDS 05-4670A01, Rev.
A Active messaging (defined) 56 Alarms alarm code definitions 41 major vs.
DTE (Data Terminal Equipment), defined 57 DTYPE command 29 use of 46 DUMP command 29 LEDs PWR 19 status indicators, illustrated 19 Loss.
mounting the transceiver 9 network-wide diagnostics 44, 46 operation 21 troubleshooting 40–41 Product description 3, 4 display model number code (MODEL command) 31 display radio serial number (SER command) 36 model number codes 6 Programming radio as root or node 46 Programming, transceiver 21–39 protocol TFTP 50, 52 PTT command 34 PWR command 34 LED 19 R Radio Configuration Software 48 serial number, displaying (SER command) 36 Receiver specifications 44 system specifications 43 Redundant operation, define
MDS 05-4670A01, Rev.
IN CASE OF DIFFICULTY... GE 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 information will assist you in the event that servicing becomes necessary. TECHNICAL ASSISTANCE Technical assistance for GE MDS products is available from our Technical Support Department during business hours (8:30 A.M.–6:00 P.M. Eastern Time).
GE MDS, LLC 175 Science Parkway Rochester, NY 14620 Telephone: +1 585 242-9600 FAX: +1 585 242-9620 www.gemds.
