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56

MDS TransNET Ref. Manual

MDS 05-2708A01, Rev.  F 

connections where wire lines were the only communications link available at 
the time. Most of these older system implemented support for the AT 
commands needed in the host software, so TransNET units can be used 
without software modifications.

In this mode, the Master’s 

DATA

 port is parsed for a subset of AT commands. 

(See 

Supported Commands

 below). When an 

ATDT xxxxx

 data sequence is 

detected, and 

xxxxx

 is a unit address of a radio in the network, the TransNET 

Master will establish a virtual link to that unit. It will remain in that state until 
either another 

ATDT xxxxx

 or 

ATH

 (hang-up/disconnect) is detected. (Note: 

Unaddressed Remotes in the network will not respond to user data. Data will 
only be exchanged between the equipment connected to the addressed 
Remote unit and the network or device connected to the Master’s 

DATA

 port.

In order to use this mode, the command 

AT ON

 must be selected at the Master 

Radio. The acknowledgment to an ATDT command is simulated by the 
Master; there is no true verification that the far-end connection is valid.

Please consider the following additional information before using the AT 
commands:

• Radio commands and AT commands are independent with unique 

syntax and functional objectives.

•

ATDT

 is not a radio command; it is part of the payload data input and 

follows the syntax for Hayes-compatible modems.

• TransNET commands are entered through the RJ11 

DIAGNOSTIC

 port 

on Master and Remote radios. 

AT ON

 and 

UNIT

 are examples of 

TransNET commands.

• AT commands are only entered through the Master’s DB-9 

DATA

 port, 

and only when the TransNET command 

AT ON

 has been previously 

issued. The radio supports a 

subset

 of the Hayes-compatible modem AT 

set. Each command is 

entered without spaces

, and always begins with 

AT

, and 

ends with a carriage return key press

.

Supported AT Commands

Supported modem commands on the payload port are:

AT <attention>

Replies with 

OK

 (Code 0).

ATDT [xxxxx] <dial>

The command 

xxxxx

 represents 5-digit unit address with a leading zero (0) 

if applicable. This command replies with 

CONNECT

 (Code 1). Once 

connected, all characters are passed through until a 

+++

 is seen.

ATH <hang up>

 or 

+++

This command replies with 

OK

 (Code 0) and deletes any virtual connection 

to the currently addressed Remote station.

ATV[x] <change verbosity>

x = 0

, means use numeric messages

x = 1

, means use text messages (Default)

Replies with 

OK

 (Code 0)

Содержание 900 MHz

Страница 1: ...Installation Operation Guide Reference Manual MDS 05 2708A01 Rev F MDS TransNET 900 MDS TransNET 2400 Spread Spectrum Data Transceiver Including supplemental data for Board Only units MARCH 2013 ...

Страница 2: ...Quick Start instructions for this product are contained in publication 05 4481A01 All GE MDS manuals are available online at www gemds com ...

Страница 3: ...k 3 Extending a TransNET Network with a Repeater 4 2 5 Accessories 5 3 0 INSTALLATION PLANNING 6 3 1 General Requirements 6 3 2 Site Selection 6 Terrain and Signal Strength 7 Conducting a Site Survey 7 3 3 A Word About Radio Interference 8 3 4 Antenna Feedline Selection 9 Antennas 9 Feedlines 10 Antenna System Ground 11 3 5 How Much Output Power Can be Used 12 4 0 INSTALLATION 14 4 1 Transceiver I...

Страница 4: ...ing Methods 22 Terminal Interface 22 PC Based Configuration Tool 22 6 2 User Commands 23 Entering Commands 23 6 3 Detailed Command Descriptions 28 ADDR 1 65000 29 Network Address AMASK 0000 0000 FFFF FFFF 29 Alarm Mask AT ON OFF 29 Hayes Compatible AT Command Support ASENSE HI LO 29 Alarm Output Sense BAUD xxxxx abc 29 Data Interface Port Baud Rate BAND A B C 30 Select Sub Band Normally used for 2...

Страница 5: ...adio Transmitter Hop Timing INIT 34 Initialize Restore to Factory Defaults HREV 35 Hardware Revision KEY 35 Turn On Radio Transmitter Test Signal LED ON OFF 36 Enable Disable PCB LEDs LPM 1 0 36 Low Power Mode Masters Only LPMHOLD 0 1000 36 Low Power Mode Sleep Time MODE M R X 36 Radio Operating Mode MRSSI NONE 40 90 37 Minimum RSSI for Mobile Operation OT ON OFF 37 Output Trigger OWM xxxxx 37 Own...

Страница 6: ...eceive Data Timeout Timer SAF ON OFF 40 Store and Forward Services Support SETUP 40 Setup Radio Test SER 40 Radio Serial Number SHOW CON 41 Show Virtual Connection Status SHOW PWR 41 Show Measured RF Transmit Power SHOW SYNC 41 Show Clock Synchronization Master Ntwk Address SKIP NONE 1 8 41 Skip Radio Operating Zones SLEEP ON OFF 42 Transceiver Sleep Remotes Only SREV 42 Firmware Revision Level ST...

Страница 7: ...m Code Definitions 47 7 3 Troubleshooting Chart 48 7 4 Performing Network Wide Remote Diagnostics 49 7 5 Internal Fuse Replacement 50 8 0 RADIO FIRMWARE UPGRADES 51 8 1 Obtaining New Firmware 51 Saving a Web Site Firmware File Onto Your PC 51 8 2 Installing Firmware Into Your Radio 51 9 0 OPERATING PRINCIPLES AND CONFIGURATION 52 9 1 SAF Operation with Extension Radios 52 Simple Extended SAF Netwo...

Страница 8: ...r Co Located Master Stations 64 9 13 Security 65 10 0 TECHNICAL REFERENCE 66 10 1 Product Specifications 900 MHz 66 10 2 Product Specifications 2 4 GHz 67 10 3 Diagnostic Interface Connections RJ 11 69 10 4 Data Interface Connections DB 9F 69 Pin Descriptions RS EIA 232 Mode 70 Pin Descriptions RS EIA 422 485 Mode 71 10 5 Board Only Supplemental Data 72 Product Differences Board only vs Standard 7...

Страница 9: ...es indiquées dans le tableau ci dessous lorsque l émetteur est en marche Plus d informations sur l exposition aux RF peut être trouvé en ligne à l adresse suivante www fcc gov oet info documents bulletins ISO 9001 Registration Microwave Data Systems adheres to the internationally accepted ISO 9001 quality system stan dard UL CSA Notice The MDS TransNET 900 is available for use in Class I Division ...

Страница 10: ...502 of the National Electrical Code NFPA 70 for further infor mation on hazardous locations and approved Division 2 wiring methods FCC Part 15 Approval Notice The products described comply with Part 15 of the FCC Rules Operation is subject to the fol lowing two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference...

Страница 11: ...nd on natural resources we encourage you to use the appropriate recycling systems for disposal These systems will reuse or recycle most of the materials found in this equipment in a sound way Please contact your factory representative for more information on the proper dis posal of this equipment Battery Disposal This product may contain a battery Batteries must be disposed of properly and may not...

Страница 12: ...x MDS TransNET Ref Manual MDS 05 2708A01 Rev F ...

Страница 13: ...cations even in the presence of weak signals or interference DSP technology also makes it possible to obtain information about radio operation and troubleshoot problems without going to the Remote radio site Using appropriate software at the Master station diagnostic data can be obtained on any DSP radio in the system even while payload data is being transmitted See Performing Network Wide Remote ...

Страница 14: ...o s enclo sure It provides key information about how the radio was configured when it was shipped from the factory This number is subject to many variations depending on what options are installed and where country the product is used Contact the factory if you have questions on the meaning of the code 2 3 Spread Spectrum Radios How Are They Different The main difference between a traditional lice...

Страница 15: ...a Remote This provides a half duplex communications link for the transfer of data between two locations Invisibleplaceholder Figure 3 Typical Point to Point Link Adding a Tail End Link to an Existing Network A tail end link can be used to extend the range of a traditional licensed MAS system This might be required if an outlying site is blocked from the MAS Master station by a natural or man made ...

Страница 16: ...le and economical manner SAF works by dividing a network into a vertical hierarchy of two or more sub networks Extension radios designated as MODE X serve as single radio repeaters that link adjacent sub networks and move data from one sub network to the next one Invisibleplaceholder Figure 5 TransNET Repeater Network PWR SYN C TXD RXD MDS TransNET Master REPEATER STATION MDS x710B Series Radio EN...

Страница 17: ...0 2822A02 TNC to N Adapter Cable 3 ft 1 meter Coaxial cable used to connect the radio s TNC antenna connector to a Type N style commonly used on large diameter coaxial cables 97 1677A159 TNC to N Adapter Cable 6 ft 1 8 meter Coaxial cable used to connect the radio s TNC antenna connector to a Type N style commonly used on large diameter coaxial cables 97 1677A160 TNC to N RF Adaptor Plug Adapts ra...

Страница 18: ...ment Master stations are similar but an omni directional antenna is normally used instead of a direc tional type and a host computer replaces the data terminal equipment Invisibleplaceholder Figure 6 Typical Remote Station Arrangement 3 2 Site Selection For a successful installation careful thought must be given to selecting proper sites for the Master and Remote stations Suitable sites should pro...

Страница 19: ...tions in the communica tions path can usually be tolerated with minimal impact For longer range systems any substantial obstruction in the communications path could compromise the performance of the system or block communications entirely Much depends on the minimum signal strength that can be tolerated in a given system Fade margin for a TransNET system does not usually have to be as conservative...

Страница 20: ... performance as long as care is taken in choosing station location configuration of radio parameters and soft ware protocol techniques In general keep the following points in mind when setting up your commu nications network 1 Systems installed in rural areas are least likely to encounter interference those in suburban and urban environments are more likely to be affected by other devices operatin...

Страница 21: ... problem The REPEAT command sets a fixed number of unconditional retransmissions for downstream data 8 The RF power output of all radios in a system should be set for the lowest level necessary for reliable communications This lessens the chance of causing unnecessary interference to nearby systems 3 4 Antenna Feedline Selection Antennas The equipment can be used with a number of antennas The exac...

Страница 22: ...dline used with the antenna should be carefully considered Poor quality coaxial cables should be avoided as they will degrade system performance for both transmission and reception The cable should be kept as short as possible to minimize signal loss For cable runs of less than 20 feet 6 meters or for short range transmission an inexpensive type such as Type RG 8A U may be acceptable Otherwise we ...

Страница 23: ... system design Please consider consulting a radio system engineer or other professional for advice or ground system design A well designed ground system will mini mize risk of electrical shock to personnel and the chances of equipment damage Table 2 Length vs loss in coaxial cables at 900 MHz Cable Type 10 Feet 3 05 Meters 50 Feet 15 24 Meters 100 Feet 30 48 Meters 300 Feet 91 44 Meters LMR 400 0 ...

Страница 24: ...sceiver is normally supplied from the factory set for an RF power of 30 dBm 1 Watt for 900 MHz and 27 dBm 0 5 Watt for 2400 MHz this is the maximum transmitter output power allowed under FCC rules The power must be decreased from this level if the antenna system gain exceeds 6 dBi The allowable level is dependent on the antenna gain feedline loss and the transmitter output power setting Power cons...

Страница 25: ... convert to dBi add 2 15 dB b Feedline loss varies by cable type and length To determine the loss for common lengths of feedline see Table 2 on Page 11 Maximum Power Setting in dBm EIRP in dBm 6 or less 30 36 8 28 36 10 26 36 12 24 36 14 22 36 16 20 36 Table 5 Antenna system gain vs power output setting USA for 2400 MHz models to achieve 36 dBm EIRP Antenna System Gain Antenna Gain in dBia minus F...

Страница 26: ...rt Team 4 1 Transceiver Installation The following is an overview of a typical procedure for installing the trans ceiver In most cases these steps alone will be sufficient to complete the installation Should further information be required contact the factory using the information given on the inside back cover of this manual If you are installing a tail end link system you should also review Sect...

Страница 27: ...ll the antenna and antenna feedline for the station Antennas should be mounted in the clear and in accordance with the manufacturer s instructions Additional information on antennas and feedlines is contained in Section 3 4 on Page 9 NOTE It is recommended to mount the antenna be at least 10 feet 3 meters from the radio RTU sensors and other components of the system to prevent RFI 3 Connect the da...

Страница 28: ...de As viewed from outside the radio 4 Measure and install the primary power for the transceiver It must be within 6 30 Vdc including transients and be capable of providing 7 5 watts over this voltage range Typical current draw is 400 mA 13 8 Vdc 0 9 A 6 Vdc A power connector with screw terminals is provided with each unit Strip the wire leads to 0 25 6 mm Be sure to observe proper polarity The lef...

Страница 29: ... DB 9 adapter cable P N 03 3246A01 If necessary a cable of this type may be constructed using the information shown in Figure 21 on Page 69 For more information on connecting a PC terminal and preparing it for use refer to Section 6 1 on Page 22 The three essential settings for the Transceiver are as follows Mode Master Remote or Extension Network Address a unique number from 1 to 65000 Data Inter...

Страница 30: ...htop setup prior to installation This allows you to test various configurations in a controlled environment Once the evaluation network is working satisfactorily you can save the configuration of each unit in a data file on your PC s hard drive through the use of the MDS TransNET Configuration Software included on the support CD shipped with the radio part number 03 2708A01 Most often there are ma...

Страница 31: ... set on each type of radio in the network For a detailed description of this network design see SAF Operation with Extension Radios on page 52 5 0 OPERATION 5 1 Initial Start up 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 LED status indicators for proper operation If all param...

Страница 32: ...ine the heading for maximum received signal strength In an MAS system RSSI readings are only meaningful when initiated from a Remote station This is because the Master station typically receives signals from several Remote sites and the RSSI would be continually changing as the Master receives from each Remote in turn Adjust the antenna for the highest most positive value to insure the greatest co...

Страница 33: ...iciency MODBUS and its derivatives are the only protocols that should require the buffer to be turned on See BAND A B C on Page 30 for details Hoptime Setting The default hop time setting is 7 7 ms Alternate settings of 14 and 28 milli seconds can be used to increase throughput but at the cost of increased latency A detailed explanation of the HOPTIME command can be found on Page 34 TotalFlow Prot...

Страница 34: ... the radio s DIAG connector using an RJ 11 to DB 9 Adapter Cable P N 03 3246A01 If desired a cable of this type may be constructed using the information shown in Figure 21 on Page 69 Once connected communication baud rate is established through the command interface To access the command interface press the key followed by one or more keystrokes delivered at about half second intervals until the p...

Страница 35: ... Master Station COMMAND DESCRIPTION AT ON OFF Details Page 29 Enables Master station to emulate a modem and respond to AT commands BUFF ON OFF Details Page 30 ON Seamless data OFF Fast byte throughput FEC ON OFF Details Page 33 Sets disables FEC Forward Error Correction setting HOPTIME 7 28 Details Page 34 Displays hop time or sets it to 7 or 28 ms LPM 1 0 Details Page 36 Used at Master to set all...

Страница 36: ... three operating bands 2 4 GHz Model Only BAUD xxxxx abc Details Page 29 Data communication parameters CODE NONE 1 255 Details Page 31 Select the security encryption setting in the radio CSADDR 1 65000 NONE Details Page 31 Used on a single Master Remote network to support TDD style simulated full duplex CTS 0 255 Details Page 31 CTS delay in milliseconds A value of 0 returns CTS immediately CTSHOL...

Страница 37: ...the radio s energy conser vation Sleep mode function UNIT 10000 65000 Details Page 43 Unit address used for network wide diagnostics Unique within associated net work XADDR 0 31 Details Page 44 This unit s Extended address Typically the Master is set to zero 0 XMAP 00000000 FFFFFFFF Details Page 44 Included Extended units in MODE X Extensions and Remotes only XPRI 0 31 Details Page 44 Address of t...

Страница 38: ...etails Page 34 Hop time value in milliseconds ms LPMHOLD Details Page 36 Time 0 1000 ms provided to give an RTU time to respond before the radio goes to sleep MODE Details Page 36 Current operating mode M Master R Remote X Extension Repeater MRSSI Details Page 37 Minimum RSSI level required to preserve syn chronization with a Master radio for Remotes in mobile service OWM Details Page 37 Owner s m...

Страница 39: ...this unit ON OFF SER Details Page 40 Serial number of radio SHOW CON Details Page 41 Display virtual modem connection status SHOW PWR Details Page 41 RF output power Measured RF power in dBm SHOW SYNC Details Page 41 Information on synchronization source SKIP Details Page 41 Frequency zones that are skipped SLEEP Details Page 42 Radio s Sleep Mode setting At Remotes Only SREV Details Page 42 Trans...

Страница 40: ...the command name XPRI Details Page 44 Address of the primary Extended radio unit Extension XMAP Details Page 44 Included Extended units in MODE X Extensions and Remotes only XRSSI Details Page 44 Minimum RSSI level required to preserve synchronization with a non primary radio Only meaningful when XPRI is not NONE Table 11 Diagnostic and Test Functions Command Description KEY Details Page 35 Enable...

Страница 41: ...it set The hex value for the mask aligns directly with the hex value for the ALARM command The default is FFFF FFFF Through proper use of the AMASK command it is possible to tailor the alarm response of the radio Refer to the Using the AMASK Command Application Bulletin AP_08004 for more information on configuring the alarm mask AT ON OFF Hayes Compatible AT Command Support AT style modem commands...

Страница 42: ...time of installation and must be common across each radio in a given network BUFF ON OFF Data Buffer Mode This command sets or displays the received data handling mode of the radio The command parameter is either ON or OFF The default is OFF The setting of this parameter affects the timing of received data sent out the DATA connector Data transmitted over the air is unaffected by the BUFF setting ...

Страница 43: ...splay either NONE or ACTIVE ACTIVE means that security encryption has been enabled but the radio will not display the security argument When a CODE value is active all radios in the system must use the same code value If the code value is not properly programmed a Remote radio will not synchronize with the Master CAUTION Record the CODE value and store it in a safe place If the code is later forgo...

Страница 44: ...EY The default selection is DCE In this mode CTS will go 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 dropping the CTS line if data arrives faster than it can be transmitted If CTS KEY is selected the radio is assumed to be controlling another radio such as in a repeater or tai...

Страница 45: ...onal characteristics for network wide diagnostics The transceiver uses the following types NODE The most common setting and the default This is the basic system radio device type Typically the radio network is comprised of nodes and one root Intrusive diagnostics can originate from any node However non intrusive diagnostics can only be conducted from the root node ROOT Always one and only one per ...

Страница 46: ...of which command setting caused the problem this command allows you to get back to a known working state NOTE Caution should be exercised when using the INIT command on radios in a sys tem employing the Store and Forward feature Settings relating to the use of Ex tension services will be lost and will need to be re entered Record the settings for XADDR XPRI and XMAP before using the INIT command S...

Страница 47: ...ndent TX xxx Receiver Test Frequency 915 000 MHz 2436 0 MHz Model dependent RX xxx Sleep Mode OFF SLEEP OFF Primary Extension Radio Address 0 Master XPRI 0 Synchronization Source Map None XMAP 0 Extended Address 0 XADDR 0 For MASTER radios AT Command Support OFF AT Buffer Mode OFF BUFF OFF Forward Error Correction ON FEC ON Hop Time 7 ms HOPTIME 7 Low Power Mode 0 Off LPM Skipped Frequencies None ...

Страница 48: ...mode network wide all Remotes pick it up and start saving power by automatically sleeping LPM 1 can work in conjunction with the AT dialing feature The dialed unit will be forced awake all others will sleep LPM 0 at the Master to disable low power mode Default setting The SLEEP command must be enabled for LPM to function Further when you enable LPM the LEDs on the Remote radio dim even though the ...

Страница 49: ...ger The output trigger feature sets up a 1 second default delay on delivery of RXD serial data however a receipt of RTS causes cancellation of timer followed by immediate data delivery Hierarchy Rules if OT ON RTS always cancels data delay and outputs immediately if OT ON DEVICE DCE and RXD 0 data delay is 1 second or until RTS if DEVICE DCE and RXD N data delay is N ms if DEVICE CTS KEY and CTS N...

Страница 50: ...of times range is 0 to 10 default selection is 3 Unlike the RETRY command there is no acknowledgment that a message has been received Use the REPEAT command without a value to display the current setting RETRY 0 10 Upstream Repeat Transmission Count The RETRY command affects upstream data The command selects or displays the maximum number of times 0 to 10 that a Remote radio will re transmit data ...

Страница 51: ... 80 Remote Terminal Unit Simulator This command re enables or disables the radio s internal RTU simulator which runs with GE MDS proprietary polling programs poll exe and rsim exe The internal RTU simulator is available whenever a radio has diag nostics enabled This command also sets the RTU address to which the radio will respond The internal RTU can be used for testing system payload data or pse...

Страница 52: ...t use this mode during normal operation When the SETUP command is entered the prompt changes to SETUP and Hopping is disabled Synthesizer frequencies are reset to the test frequencies specified by the TX and RX commands described earlier The radio can be keyed using the KEY command DKEY is used to unkey the radio If the radio is left in a keyed state it is automatically unkeyed after 10 minutes Th...

Страница 53: ...displayed in parentheses SHOW SYNC works for Dependent Masters A value of zero 0 means the station is a Master synchronized to a Clock Sync Master The SHOW SYNC command will display an asterisk after depth value if the radio is operating with co located Masters SKIP NONE 1 8 Skip Radio Operating Zones This command sets or displays which if any of the eight zones will be skipped from the radio s ho...

Страница 54: ...ision Level This command displays the version of the firmware currently loaded into the transceiver Table 13 900 MHz Frequency Skip Zones ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 ZONE 7 ZONE 8 902 2 to 905 2 905 4 to 908 4 908 6 to 911 6 911 8 to 914 8 915 0 to 918 0 918 2 to 921 2 921 4 to 924 4 924 6 to 927 6 Table 14 2400 MHz Band A Frequency Skip Zones ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE ...

Страница 55: ... degrees Celsius Note that the radio is specified to operate in an environment between 30 C and 60 C This internal reading may be higher than the outside temperature by several degrees TX xxxx Radio Transmit Test Frequency This command sets or displays the test transmit frequency used in place of hopping whenever the radio is in Setup mode The test transmit frequency for the 900 MHz radios can be ...

Страница 56: ...orward Settings panel XPRI 0 31 Primary Extended Address Will display or program the extended address of the primary radio with which this radio will attempt to synchronize and communicate A setting of NONE allows the unit to synchronize with any Master or Extension in the XMAP list Parameter only meaningful for Remote or Extension units XRSSI NONE 40 120 Extension RSSI Level The XRSSI command is ...

Страница 57: ...ors All zone data is reset with the ZONE CLEAR command 7 0 TROUBLESHOOTING Successful troubleshooting of the transceiver is not difficult but 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 instructions and synchronization data If the Master station has problems the operation of the entire network wil...

Страница 58: ... as a major or minor alarm A brief description of the alarm is also given Alarm codes and their meanings are listed in Table 18 If more than one alarm exists the word MORE appears at the bottom of the screen additional alarms can be viewed by pressing Major Alarms versus Minor Alarms Major alarms report serious conditions that generally indicate a hardware failure or other abnormal condition that ...

Страница 59: ...nthesizer loops is reporting an out of lock condition 08 Major The system is reporting that it has not been calibrated Factory calibration is required for proper radio operation 10 Major The DSP was unable to properly program the system to the ap propriate defaults A hardware problem may exist 12 Major Receiver time out alarm 16 Minor The unit address is not programmed 17 Minor A data parity fault...

Страница 60: ...e interface connections at the radio and the connected device b Check the antenna feedline and connectors Reflected power should be less than 10 of the forward power reading SWR 2 1 or lower c If the Remote radio is in synchronization but performance is poor check the received signal strength using the RSSI com mand Page 38 If RSSI is low it may indicate antenna prob lems or misalignment of direct...

Страница 61: ...ndbook P N 05 3467A01 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 RJ 11 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 ...

Страница 62: ...een the top cover s LED panel and the motherboard You do not need to disconnect the ribbon cable 4 Locate the fuse holder assembly behind the power connector See Figure 16 5 Loosen the fuse from the holder using a very small flat bladed screwdriver then use a small pair of needle nose pliers to pull the fuse straight up and out of the holder 6 Use an ohmmeter or other continuity tester to verify t...

Страница 63: ...hard drive After the S28 file has been saved to your computer you may use either MDS TransNET Configuration Software or MDS Radio Software Upgrade programs to install this firmware in your radios 8 2 Installing Firmware Into Your Radio 1 Connect the PC to the radio s DIAG port using an RJ 11 to DB 9 Adapter Cable Part No 03 3246A01 If desired a cable can be fabricated from the information shown in...

Страница 64: ...F will cut the overall data throughput in half however multiple networks can be inter connected with no additional loss in network throughput Simple Extended SAF Network The following example depicts a two level network utilizing a single Master M and an Extension X radio See Figure 17 Invisibleplaceholder Figure 17 Simple Extended SAF Network Networks J and K In this network messages directed to ...

Страница 65: ...ally the sub network side of an Extension behaves like a corre sponding connection between a Master and a Remote When an Extension is using its Master personality it sends acknowledg ments and performs unconditional retransmissions based on its REPEAT count When an Extension is using its Remote personality acknowledgments are processed and retransmissions occur as needed up to the number of times ...

Страница 66: ...er controls the synchronization for a given network for all modes Setting the Master to SAF ON broadcasts a command from the Master to all radio units in the associated network either directly or through an Extension radio This command puts all radios in the entire system in a special time division duplexing mode that alternates between two timeslots One time slot for data communications upstream ...

Страница 67: ...rimary radio in the XMAP list Once every 30 minutes if a primary is defined the radio will check its synchronization source If the radio is synchronized to a unit other than the primary then the current RSSI value is compared to the XRSSI value If RSSI is less than XRSSI or if XRSSI is NONE the radio will force a loss of synchronization and hunt for the primary again as described in the previous p...

Страница 68: ...lease consider the following additional information before using the AT commands Radio commands and AT commands are independent with unique syntax and functional objectives ATDT is not a radio command it is part of the payload data input and follows the syntax for Hayes compatible modems TransNET commands are entered through the RJ11 DIAGNOSTIC port on Master and Remote radios AT ON and UNIT are e...

Страница 69: ...d Services The installation and configuration of a radio network with an Extension using SAF is straightforward with only a few unique parameters that need to be considered and set at each unit In every network there can be only one Master station It will serve as the sole gateway to the outside world The following three tables detail the parameters that will need to be set on each type of radio i...

Страница 70: ...he network use the same number Extended Ad dress XADDR Details Page 44 A number between 0 and 31 that will serve as a common address for radios that syn chronize directly to this Ex tension radio serving as Master for associated sub network units Zero 0 is recommended for the Master station Primary Extended Address XPRI Details Page 44 XADDR number of the pri mary or preferred radio with which thi...

Страница 71: ... asserted the radio will be ready to receive data within 75 milliseconds or less The radio can be awak ened more often if desired by your RTU NOTE The SLEEP function must be set to ON without this a ground on Pin 4 will be ignored Table 23 Configuration Parameters for SAF Services Remote Radio s Parameter Command Description Operating Mode MODE R Details Page 36 Sets the radio to serve as a Remote...

Страница 72: ...ion in power consumption 9 6 Low Power Mode LPM Master Enabled The Low Power Mode LPM puts Remote radios into a configuration similar to Sleep but with some important distinctions The most important difference is the radio will automatically go to sleep in this mode regardless of the condition of Pin 4 of the DATA interface connector This feature trades increased latency to gain power savings The ...

Страница 73: ...a delay values for various settings of TransNET radios setup for Low Power Mode LPM See LPM 1 0 on Page 36 It assumes the primary power voltage is 13 8 Vdc and the polling rate is minimized to yield best case power consump tion current values The more each RTU is polled and asked to transmit the more current will be consumed Therefore these values are the lowest that can be expected Power consumpt...

Страница 74: ... for Minimum RSSI MRSSI Initially the Remote will favor Masters with signal strengths 10 dB greater than the MRSSI threshold This will allows for some signal degradation of the new Master as the Remote travels When the average signal level from the currently associated Master falls below the user defined MRSSI level the Remote will become out of sync and seek an alternate Master with a reliable si...

Страница 75: ...ess operating mode but can be very slow to start especially if it waits for the reception of long messages before passing on the message 9 11 Full Duplex Emulation If your system design needs to support PTP or Point to Multipoint applica tions and your communications must appear to be full duplex to the connected devices set the Master to CSADDR xxxxx where xxxxx is the Network Address ADDR This w...

Страница 76: ...ll dependent units NOTE If a Dependent Master station is unable to find the Clock Sync Master station it will not be able to operate properly and the associated network will be out of service Antenna System for Co Located Master Stations Using this TDD Clock Sync mode will prevent any two Masters from trans mitting and receiving at the same time and greatly reduce the antenna separa tion requireme...

Страница 77: ...se of the following items 1 A proprietary modem data link layer Data signals are processed using code and hardware specifically designed by GE MDS 2 A unique Network Address This provides a unique identifier for each radio in a network A radio is not addressable unless this unique code is included in the data string 3 An optional encryption value code Setting an encryption code requires the use of...

Страница 78: ...lity 1 5 ppm Half Duplex Operation 1 6 MHz TX RX split Network Addresses 65 000 Temperature Range 40 C to 70 C Humidity 95 at 40 C non condensing Primary Power 13 8 Vdc Nominal 6 30 Vdc range Current Draw typical 30 dBm Transmit 510 mA 13 8 Vdc Receive 115 mA 13 8 Vdc Sleep Mode 3 mA 13 8 Vdc Size 5 30 W x 3 50 D x 1 40 H 135 W x 89 D x 36 H mm Weight 1 Lb 0 5 kg w o brackets 1 15 Lb 0 52 kg w bra...

Страница 79: ...perheterodyne Sensitivity 110 dBm 10 6 BER Intermodulation 54 dB minimum EIA Desensitization 75 dB Spurious 70 dB minimum Bandwidth 200 kHz Interference Ratio SINAD degraded by 3dB Co channel 10 dB Adjacent channel 30 dB Two channels away 40 dB Three channels away 48 dB Time Required to Synchronize with Master Radio 0 5 seconds typical 10 2 Product Specifications 2 4 GHz GENERAL Frequency Band 240...

Страница 80: ...ity Consult factory for on file data DATA CHARACTERISTICS DB 9 Data Port Data Interface RS 232 422 485 Interface Connector DB 9 female Data Rate 300 600 1200 1800 2400 4800 9600 19200 38400 57600 115200 bps asyn chronous Data Latency 7 ms typical Byte Length 10 or 11 bits Maximum Data Transmission Continuous up to 115200 bps RF CHARACTERISTICS TNC RF Connector TRANSMITTER Power Output at antenna c...

Страница 81: ... balanced format depending on how the radio was configured at the factory The radio supports data rates of 300 600 1200 1800 2400 4800 9600 19200 38400 57600 and 115200 bps asynchronous data only The DATA connector mates with a standard DB 9 plug that is available from many electronics parts distributors Table 27 and Table 28 provide detailed pin descriptions for the DATA connector in RS EIA 232 m...

Страница 82: ...ote radio including transmit receive modem and diag nostic functions This allows for greatly reduced power consumption yet preserves the radio s ability to be quickly brought on line See Using the Radio s Sleep Mode Re mote Units Only on Page 59 for details 5 IN Signal Ground Connects to ground negative supply potential on the ra dio s PC board and chassis 6 OUT Alarm Output An RS 232 high space 5...

Страница 83: ...ed device 3 IN RXD RXA Non inverting receiver input Accepts data from the connected device 4 IN Sleep A ground on this pin turns off most circuits in a Re mote radio including transmit receive modem and diag nostic functions This allows for greatly reduced power consumption yet preserves the radio s ability to be quickly brought on line See Using the Radio s Sleep Mode Re mote Units Only on Page 5...

Страница 84: ...t The LED order and functionality remain the same however Finally the board only unit is not intended for high duty cycle applications such as may be required in some master station and repeater arrangements see note below This is due to heat dissipation requirements NOTE The board only unit is not suitable for extremely high duty cycle applications For master station or repeater use where transmi...

Страница 85: ...strument Figure 25 Mounting Hole Dimensions 10 6 User Configurable I O Connections Several connection points eyelets are provided within the transceiver near the DATA interface connector that allow the user to facilitate unique integra tion requirements By jumpering eyelets external functions unconditioned I O may be communicated within the TransNET network using a Network Management System NMS su...

Страница 86: ...your PCB does not look like the one in the Figure 26 consult with the factory Technical Services for assistance Each pin connected to user designed equipment must be connected through a special cable constructed to breakout the User I O pins Your interface can complement your unique requirements The input signals and output interface must be within the radio s interface parameters as summarized in...

Страница 87: ...or will remain in a constant state until manually changed though the InSite Configuration screen Application Example Digital Input and Output at a Remote A typical application of the user I O connections may require one digital input and one digital output to be controlled by network diagnostics In this example H3 could be jumpered to H7 I O 1 to RJ 11 Pin 1 and H4 jumpered to H8 I O 2 to RJ 11 Pi...

Страница 88: ... 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 0355 dBm 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 90 dBm mV Po 49 0 8...

Страница 89: ...ation 20 selection 9 SWR check 21 system gain vs power output setting table 13 Yagi illustrated 10 ASENSE command set display alarm output sense 29 B BAUD command set display data interface port attributes 29 Baud rate setting 22 setting for RJ 11 DIAG port DLINK command 49 BUFF command set display received data handling mode 30 C Cable data equipment to DATA INTERFACE connector 15 22 data interfa...

Страница 90: ... display set radio mode as master remote or extension 36 MODE radio operating mode 36 most often used commands 28 network configuration 23 OWM set display optional owner s message 37 OWN set display optional owner s name 37 PORT display set current data port 37 PWR set display RF forward output power 38 Radio transmitter test frequency TX 43 RSSI display received signal strength 38 RTU enable disa...

Страница 91: ...nSite software for network wide 49 Diagnostics Link DLINK 32 Display alarm output sense ASENSE command 29 alarms STAT command 43 CTS hold timer value CTSHOLD command 32 CTS line response timer value CTS command 31 data interface baud rate BAUD command 29 device behavior DEVICE command 32 hoptime setting HOPTIME command 34 network address ADDR command 29 operating status commands 24 owner s message...

Страница 92: ...Feedline selection 9 10 Firmware Revision Level Command SREV 42 Forward Error Correction FEC Command 33 Fuse Replacement 50 G Gate radio diagnostics type 33 50 H Hardware Revision HREV Command 35 Hayes Compatible AT Command AT 29 Hoptime setting 21 HOPTIME Command radio transmitter hop timing 34 HOPTIME command set display hoptime setting 34 I Illustrations antenna Yagi 10 data interface cable wir...

Страница 93: ...PM Command low power mode 36 LPMHOLD Command 36 M Map 44 Map of Extension Addressses XMAP 44 Master Station default settings 34 MIRRORED BITS Protocol Support 62 63 MODE Command 36 MODE command display set radio mode as master remote or extension 36 MODE command display set radio s operating mode as master remote or extension 36 37 Model configuration code illustrated 74 Modes Low Power Mode versu...

Страница 94: ...PORT command set display current data port 37 Power Low Power Mode versus Remote s Sleep 62 Power RF how much can be used 11 Measurement 41 set display RF forward output PWR command 38 Power saving mode see Sleep Mode Primary Extension Address XPRI 44 Procedures antenna aiming 20 antenna and feedline selection 9 antenna SWR check 21 connecting data equipment to DATA INTERFACE connector 15 22 conne...

Страница 95: ...or Command RSSI 38 Remote radio default settings 34 Remote station typical arrangement illustrated 6 Remote Terminal Unit Simulator Command RTU 39 Repeater Operation See Store and Forward SAF Restore to Factory Defaults INIT 34 RJ 11 Diagnostic Interface Connection 69 Root radio diagnostics type 33 50 RSSI command display received signal strength 38 RTU command enable disable internal RTU 39 RX co...

Страница 96: ...NC Command 41 Show Virtual Connection Status Command SHOW CON 41 Site selection 6 SKIP command set display frequency zone to skip 41 Skip Radio Operating Zones SKIP 41 SLEEP command display set radio s sleep setting 42 SLEEP command transceiver sleep ON OFF 42 Sleep Mode 59 Spread spectrum basic principles of 2 SREV Command 42 STAT command list alarms 43 Store and Forward SAF 4 23 27 34 40 45 52 5...

Страница 97: ... 49 table 48 Turn Off Radio Transmitter Test Signal DKEY Command 33 Turn On Radio Transmitter Test Signal KEY Command 35 U UNIT Command unit address 43 Upstream Repeat Transmission Count Command RETRY 38 X XADDR extended address command 17 27 34 35 45 55 58 XADDR extended address Command 37 XPRI command display set extended address 44 XRSSI command sets min RSSI level to maintain sync w non primar...

Страница 98: ...I 10 MDS TransNET Ref Manual MDS 05 2708A01 Rev F ...

Страница 99: ...e equipment is necessary you will be issued a Service Request Order SRO number The SRO 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 SRO 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 SRO number A state...

Страница 100: ...GE MDS LLC Rochester NY 14620 General Business 1 585 242 9600 FAX 1 585 242 9620 Web www gemds com 175 Science Parkway ...

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