M7-VM User Manual
Contents
1. ori eee ts Error Bookmark not defined 2 Center dsl nle Error Bookmark not defined P SEED AMBIANCE Error Bookmark not defined A TX Modulation Balance Error Bookmark not defined 11 5 RX Carrier Detect indeed NENNEN er dne reae dett Error Bookmark not defined 12 SkyLine Compatibility Error Bookmark not defined 12 1 General brut Nu eei urne ee co retenue qus Error Bookmark not defined 12 2 Configuring M7 to Communicate with a SkyLine Error Bookmark not defined 13 Antenna Information Error Bookmark not defined 14 Appendix A Serial Port Hardware 32 14 1 Serial Port Data and Handshaking Signals nnn 32 14 2 Null modem without bhandehaking eene nnne nnne 34 14 3 Compatibility ISSUES deeem 34 14 4 Null modem with full handshaking conc nn ncnnnnnn cnn ncn nr nnannnnnnn 35 14 5 Compatibility TEE 35 15 o o A A cree ret eret creer eee eet er pter tiei 36 Symptom Unit willinot recelve 3 52 eoe cte e eed dei exte ce ean e one a ed 36 Symptom Unit will not tranemt eren nennen eren nnn nnnr nnns ener nenna enses 36 Symptom Receive light blinks but no data is received ese sese 36 Symptom Long delay before Iransmtttng enne ennt 37 Symptom Cannot enter Command Mode 37 Symptom Modem appears dead 37 Symptom Repeater will not repeat eee 37 16 Mechanical 38 1 Ge2. ve gt Fi n RV M7 VM MURS Data Radio Modem Technical Manual Version AO Feb 2010 Raveon Technologies Corporation 2780 La Mirada Drive Suite C Vista CA 92081 www raveontech com L Table of Contents General Information about the RHvVM 4 1 1 Congratulations icono 4 1 2 NOTICE A e EDI MEE idu 4 1 3 Safety Warning Information sse enne nennen enr rre 4 1 4 Safety Training Information 4 1 5 FCC Compliance Information 2 e ta cerent fue uin EEN auae Va nte eda Lala 6 DU QUI deed 7 2 1 E EE ee eege eege enee eege ee deeg 7 Specifications nnonnnnnnannnnnennnnnnnnnnnnrrrrnnrrnrrrnrrrrnnnrrnrrnnnrrnnnnnrnnnnnnrennnnneennnn 8 3 1 SOME Pall eet 8 3 2 Transmitter Error Bookmark not defined 3 3 CU MEME 8 3 4 User Input and Output Signals iro cernes vee rette o eade D ENEN REESEN e vong uu n 8 3 5 Model Du 9 Electrical Inputs and Keel 10 4 1 B IDs A 10 4 2 DG Sie TEE 10 4 3 WX weatherproof Version Error Bookmark not defined POWER GOR EE Error Bookmark not defined 4 4 RS232 serial cable for WX version Error Bookmark not defined 4 5 Optional EIA 485 RS 485 Serial IO Error Bookmark not defined RS 485 Connector Pin Out Error Bookmark not defined rente MO Error Bookmark not defined Bias and Termination Resistors eee Error Bookmark not defined 4 6 RS422 EIA 422 Se
3. TO ID of the transmission is the address set using the ATMA command This allows the system to be configured in a way the normal modem communications take place between the modems and the status information only is delivered to modems that need to receive it Company Confidential 60 Raveon Technologies Corp 8 Appendix A Serial Port Hardware 8 1 Serial Port Data and Handshaking Signals In computer terminology the RF modem is considered a Data Communications Equipment device or DCE The user s hardware that the modem is connected to is considered Data Terminal Equipment or DTE Following is a description of how data and control is communicated over the various serial port signals between the modem DCE and another device DTE that the modem s I O port is connected to TxD INPUT This line is used to transmit data from the DTE to the DCE It is maintained at a logical 1 state when nothing is transmitted If Hardware Flow Control is enabled in the modem the terminal will start to transmit data to the modem when a logical 1 is present on all of the following lines e Clear To Send output from modem e Request to Send output from the DTE RxD OUTPUT This circuit is used to receive data from the DCE to the DTE The modem will start to transmit data to the DTE when a logical 1 is present on all of the following lines e Data Terminal Ready reply that it is OK to send e Data Set Ready asserte
4. 4 User Serial Port Commands 4 1 Overview The serial portion the RF modem is used to send and receive data over the air as well as to configure the RF modem In normal operation the user sends data into the TxD pin of the user port and this data is transmitted over the air Received data from another RF modem is output to the user via the RxD pin of the user port This is the default operating condition of the RF modem No special characters hardware control lines or timing is required to operate the M7 modem There is also a Command Mode used to program and configure the M7 In the Command Mode the M7 modem accepts commands via the serial port TxD pin The commands can be used to change certain internal parameters of the M7 modem as well as to read out the current configuration and diagnostic statistics 4 2 Command Mode The M7 modem may be put into a Command Mode by entering a sequence of three plus characters To keep the M7 modem from unintentionally entering the Command Mode because of the pattern occurring in a stream of data entering the modem there must be a pause in the data stream before the as well as a pause after the is sent If either pause is missing the modem will not enter the command mode Using serial communications software such as HypterTerminal send the 3 character command sequence while observing times of silence before BT Silence Before Sequence Command and aft
5. CONSEQUENTIAL DAMAGES SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES ALL IMPLIED WARRANTIES INCLUDING THE WARRANTY OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY MODIFIED TO EXIST ONLY AS CONTAINED IN THIS LIMITED WARRANTY AND SHALL BE OF THE SAME DURATION AS THE WARRANTY PERIOD STATED ABOVE SOME STATES DO NOT ALLOW LIMITATIONS ON THE DURATION OF AN IMPLIED WARRANTY SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU This warranty gives you specific legal rights and you may also have other rights which vary from state to state Warranty service is available by mailing postage prepaid to Raveon Technologies Corporation 990 Park Center Drive Suite C Vista CA 92081 To obtain warranty service include a copy of the original sales receipt or invoice showing the date location and price of purchase Include a written description of the problem with the product a phone number and name of person who may be contacted regarding the problem and the address to where the product should be returned Products repaired under warranty will typically have their program memories erased and reset to factory default settings Company Confidential 60 Raveon Technologies Corp
6. ignored by the M7 modem May ready control the power state of the modem in low power mode if this feature is enabled 5 GND Ground Signal and power ground connection out Normally is set to O when modem is powered on 6 DSR Data Set Ready and running Modem sets to a 1 when in low power mode in Used to stop start the flow of data coming out of 7 RTS Request to send the modem TxD pin 0 OK to send 1 don t send Leave disconnected if not used out Used to stop the flow of data going into the RxD pin from the device connected to the M7 0 8 CTS Clear to send OK to send 1 don t send If the M7 cannot accept more data it will negate this signal set to a 1 In out DC power not User may supply the DC power to the modem 9 Power TER Ring signal on this pin Note RS 232 signals use positive and negative voltages to represent digital 1s and Os A positive voltage is a 0 and a negative voltage is a digital 1 This pin out allows it to be directly plugged into a computer s 9 pin serial port using a conventional 9 pin RS 232 serial cable To connect it to a modem or computer peripheral that has a serial port you will need a null modem cable See Appendix A for more information on wiring a null modem cable To configure the M7 modem for RS 232 operation use the ATIO 0 command RS 232 is the default operation mode for the connector RS 485 is a factory option See the next section for details on the RS 485 option
7. source not found for more information about choosing the over the air data rate Company Confidential 60 Raveon Technologies Corp 5 5 Addressing Packetized Mode only Addressing Basics One of the more powerful aspects of the M7 modem is its addressing scheme Incorporating addressing in the modem allows multiple radio systems on the same frequency to co exist and not interfere with each other Also some user application cannot tolerate receiving data that was not intended for it and by setting the addresses in the modems properly the system can be configured to allow reception of only data intended for the recipient If addressing is not needed or desired it can be turned off so that all modems receive data from all other modems and all modems can talk to all other modems Each M7 contains a 16 bit address called its Unit Address and is represented as a 4 digit hexadecimal number M7 address may be any number between 0000 and FFFF which is effectively 65 535 different addresses Every M7 has a Unit Address programmed into it as well as the ID of the unit it will send data to The Unit Address is programmed with the ATMY xxxx command and the Unit Address of the destination modem the Destination Address is configured with the ATDT xxxx command The defaults UNIT ID in al M7 modems is 1234 and 1234 is the default for the destination ID An Address Mask is used to select which digits of the address will be used to determine
8. such a null modem cable without handshaking can be seen in the figure below Simple null modem without handshaking DB 9 female ajpula 6 90 Function Rx Tx Signal ground 8 3 Compatibility issues There is a problem if either of the two devices checks the DSR or CD inputs These signals normally define the ability of the other side to communicate As they are not connected their signal level will never go high This might cause a problem The same holds for the RTS CTS handshaking sequence If the software on both sides is well structured the RTS output is set high and then a waiting cycle is started until a ready signal is received on the CTS line This causes the software to hang because no physical connection is present to either CTS line to make this possible The only type of communication which is allowed on such a null modem line is data only traffic on the cross connected Rx Tx lines Company Confidential 60 Raveon Technologies Corp 8 4 Null modem with full handshaking In this null modem cable seven wires are present The cable is shown in the following figure Null modem with full handshaking DB 9 female ajpula 6 90 Connector 1 Connector 2 Tx DTR Signal ground DSR RTS gt CTS n 8 5 Compatibility issues The null modem cable with full handshaking does not permit the older way of flow control to take place The main incompatibility is the cross connection of
9. used x 0 if no ARO used Factory default is no ARQ ATBD Serial port baud rate ATMY The ID of this unit Default is 1234 ATMK The network address mask Default is FFFF ATDT The address of the unit this modem will talk to Default is 1234 ATBC Enable disable busy channel lock out 6 Connect your serial data device to the 9 pin connector on the front of the modem The radio is now ready to use Any serial data going into the modem will be transmitted over the air and any data received over the air will be sent out the serial port Remember that from the factory all M7 modems are configured to simply work Plug in power and connect to the serial port at 9600 baud and the modems will communicate on the default channel Change the channel frequency to your specific frequency and they will be ready to work on your channel Company Confidential 60 Raveon Technologies Corp 5 2 Programming Channels The M7 modem has memory for up to 6 channels A channel is a pair of frequencies one for transmit and one for receive They may be different or they may be the same You may program any valid frequency into any channel number To program a channel perform the following steps 1 Change to the channel you wish to program using the ATHP x command where x is the channel number 2 Review the frequency setting with the ATF command 3 To change the radio channel use the ATHP x command while the modem is in the command mode
10. 5 3 Data Transmission To transmit data send one or more bytes of data into the serial port of the modem When a full packet of data has been collected into the internal buffer of the modem or when there is a pause in the data the modem will automatically key its transmitter and send the data over the air Serial Port Baud Rate While the modem is transmitting the user may continue to send more data into the M7 Because the buffers in the M7 are full duplex the serial port data rate and the over the air data rates are independent The serial port baud rates may be set slow to accommodate legacy equipment or set at high speed to minimize latency The over the air data rate us usually 4800 baud for narrow band channels and 9600 baud for wide band although faster or slower rates may be used In Packet Mode selection of the serial port baud rate is important As shown above if the serial port baud rate is the same as the over the air baud rate and the packets are short the channel utilization is only about 5096 But if the serial port baud rate is set much higher say 2 8X the over the air rate the channel utilization becomes near 10096 Because the M7 can handle serial port data rate far in excess of the over the air rate the efficiency of the M7 in Packet Mode is approximately the same as other brand modems that cannot operate in a Packet Mode with the added benefit or ARQ error free data and addressing Note that many Windo
11. No squelch setting required e SkyLine and FireLine compatibility mode for use in older Sonik radio systems 3 Specifications 3 1 General All measurements made per TIA 603 B DC input voltage miii Aaa Be lee richie a lee 9 16V DC GIE 5 0 X 3 76W X 0 95H Weight iia o Ee Eege 6 ounces 0 17kg DC input voltage 10 16V DC Internal fuse 3A mini blade Littlefuse part number 0297003 or Raveon part number 1X726 3 FCC ID Model RV MI VMCN nennen rnnt en rin nennen nnne nennen nnne SRS M7 VM 3 1 Transmitter Maximum RF Donwer gouft 2 0 watts Maximum duty CY TE 50 at full power Maximum transmit frequency deviation nennen eere 2 25kHz COG CUPS Reien EE TX 51T eH 110 C Em lt 70dBc 3 2 Receiver Typical RX sensitivity 1 BER 9600bps 4 level 12 5kHz channel 109dBm 4800bp5 2 Level iii muaa aa a dee Fenced Fe eee 113dBm NE 116dBm UU EIU TEE 118dBm RX selectivity EEUU 50dB Spuriotis and image rejeCtlOr coo uit dion tina piece critica 60dB RX intermodulation rejection ssssseseeeene enm ene nennen nne enne nns 60dB at 2400bps Conducted spurious emissions eceiie ee eese 22252222 daosine n ER as ase URL Eaa iiia 20dBm 3 3 User Input and Output Signals Serial port baud raies 1200 2400 4800 9600 19200 38400 57600 115200 Voltage levels enne RS 232 RS 422 and RS 485 complaint levels Modem handshake si
12. Returns various low level statistics Low level These are subject to change in various firmware revisions statistics screen ST3 Compile date and time Returns the data and the time that the Date and time firmware was compiled Run Time Returns the amount of time that the modem has been Run time display ST4 powered up and running screen ST9 Reset all statistics counters OK Company Confidential 60 Raveon Technologies Corp Statistic Read Returns numeric values comma separated of all Run time display ST10 statistics as described in the ST command screen Company Confidential 60 Raveon Technologies Corp 7 4 ATST Command The ATST command will return the following information STATISTICS Good RX Packets nnn packets received over the air with no bit errors and correct address With Bad CRCs nnn over the air packets with bit errors that were discarded With Bad Noise nnn receptions that were aborted due to noise CW jamming lost signal Bytes received nnn number of bytes this modem received and sent out its serial port number of bytes this modem received via the serial port and transmitted over the air Bytes transmitted nnn Packets send nnn numberof packets this modem has transmitted over the air Retransmissions in the ARQ mode are not counted ACKs received nnn Number of ACK packets this modem received when ARQ was enabled ACKs transmitted nnn Number of ACK packets sent o
13. a busy channel The ATBC 0 command turns it off and thus the modem will transmit when it needs to regardless if the channel is busy The RX led on the front of the modem is illuminated whenever the radio channel is busy RF present Solution 4 Verify Low Power Mode The M7 has an optional Low Power Mode LPM If LPM is enabled the M7 will power down whenever the DTR line of the serial port is turned off The Power LED will blink once every 10 seconds in the LPM mode The ATSM command is used to set or read the Low Power Mode ATSM 1 enables it and ATSM 0 disables it If LPM is used ATSM 1 then the M7 will turn off when the DTR line is off or the program connected to the serial port is closed or the RS 232 connector is un plugged Symptom Receive light blinks but no data is received Solution 1 verify Input Output Configuration The M7 has numerous UO options RS232 is standard but Ethernet RS485 or RS422 may be configured also Use the ATIO command to view how the I O is configured ATIO 0 is the default RS232 mode Solution 2 Verify the serial port baud rate This is difficult if it is set wrong because you cannot enter the command mode to check it Try all possible baud rates and see if one of them works with the modem Alternately remove the rear cover of the modem and press the CONFIG button This will force the modem into the Command Mode as well as set the serial port to 9600 Company Confidential 60 Raveon Technol
14. ack when it sends data ATRB xx commana For example if you set ATRB to 5 with the ATRB 5 command the modem will wait for an ACK whenever it sends data If it receives and ACK back from the modem that it sent data to it will do nothing more But if it does not receive an ACK it will resend the same data trying up to 5 more times The factory default condition is not to send or require ACK packets so if you wish to use this mode program the M7 to transmit ACKs with the ATAK 1 command This will cause the modem to send an ACK anytime it receives data from another modem Note If the destination address was a broadcast FFFF FFxx or xxFF it will not wait for an ACK The number of times it retries to send data that does not get through does not get an ACK is up to the user but a number of 5 is usually a good compromise If after 5 times the data does not get through then there probably is something seriously wrong with the channel or system The retried transmissions are randomly spaced at intervals between approximately 200mS and 400mS increasing by 50mS for each attempted Company Confidential 60 Raveon Technologies Corp transmission Once the modem has sent its data the number of times the user specified in the ATRB xx command the data is discarded and the modem will continue to operate as normal It is very important that if one modem is configured to send ACK packets ATAK 1 that all other modems communicating with it ar
15. ck Out If your system operation require the M7 modem to monitor before transmit of if you do not want the M7 to transmit on a channel that is busy you can enable Busy Channel Lockout using the ATBC 1 command ATBC 0 disables BCL and thus the modem will transmit whenever it has data to send out The factory default is BCL disabled Use caution when enabling it as a CW interferer PC with poor shielding or some other source of RF can stop the modem from transmitting The threshold where the M7 senses RF carrier and determines that the channel is busy is set by the ATRA command This is factory calibrated to an equivalent RF level of approximately 110dBm 5 4 Data Reception When the modem receives data over the radio it checks it for errors and if it is error free it will send it out the serial port Again the serial port may be set to any baud rate the user wishes and the radio receiver and transmitter will continue to operate independently of the baud rate When the modem receives a signal it will assert the CD hardware signal on the RS 232 serial port if it was configured to do so In general the slower the over the air data rate the easier it is for the modem to receive the signal and thus the more communication range the radio will have M7 modems have a unique switched filter along with digital signal processing that gives them more range a lower data rates See Section Error Reference source not found Error Reference
16. control should be enabled hardware flow control implemented or the serial port baud rate reduced OS loop time nnn number of times OS executes per baud Typical 10 200 0 or gt 5000 means there is a serious OS problem OS Speed nnn speed of the main Operating System in Hz Typical 8000 30000 VCO Bias nnn the DAC value that biases the VCO in the radio 0 1024 0 3 3V Config hhhh hexadecimal representation of an internal configuration word OK Company Confidential 60 Raveon Technologies Corp 7 6 ATST3 Command The ATST3 command will return the time and date the firmware in the M7 was compiled 7 7 ATST4 Command The ATST4 command will return internal timers that tell how long the modem has been powered up and running All of these timers restart a 0 upon power up Run time Years nnn number of years running Days nnn number of days running resets to 0 after one year Hours nnn number of hours running resets to 0 after 23 hours 59 minutes 59 seconds Min nnn number of minutes running resets to 0 after 59 minutes 59 seconds number of seconds running resets to 0 after 59 seconds number of seconds running Does not reset sec nnn Uptime nnn OK 7 8 AutoStatus The auto status feature of the M7 enables it to automatically transmit a packet of status information By default this feature is disabled To enable the Auto Status feature use the ATAS xxx command where xxx is the
17. d by the modem RTS On this line the DTE will send a signal when it wants to receive data from the M7 modem The M7 modem will not output data unless this pin is low or Flow Control has been disabled in the modem set up When a DTE such as a PC or microcontroller wants to stop the flow into it it negates RTS Negated Request To Send digital 1 means request NOT to send to me stop sending When the DTE is ready for more bytes it asserts RTS digital 0 and the flow of bytes to it resumes DCE equipment works the same way but sends the stop signal out the CTS pin Thus it s RTS CTS flow control using 2 lines The user may turn this feature off or on using the ATCH command The default is OFF To turn it on issue an ATCH 1 command CTS This signal is an output from the M7 and it indicates the M7 s ability to send more data If the user tries to send more data into the M7 than the M7 can transmit over the air it will negate the signal on this pin The CTS may be asserted when the serial port data rate is greater to or equal to the over the air Company Confidential 60 Raveon Technologies Corp rate For example if the over the air data rate is set to 2400 baud and the user is send data into the modem at 9600 baud the modem will negate the CTS signal once the M7 s internal data buffers become full CD On this line the modem indicates to the DTE that it has received a carrier from a remote device It will assert thi
18. dem exits configuration mode after this command is executed It saves all parameters except the frequency The frequency is automatically saved when an ATFT ATFR or ATFX command is executed 0 Go back to normal 1 Random 2 Hop up dn one channel Transmit Test Data When issued the modem will begin 3 1010 at baud rate transmitting data The type of data sent is set in the 4 TX all Os parameter Entering a CR will terminate the transmission 5 TXall 1s 6 Test Points ON 7 Transmit CW 8 Transmit 1010101 Read product temperature Read the internal temperature 40 to 99 of the unit s circuit board in degrees Celsius Max Packet Size Set the maximum number of bytes in an 1 512 over the air packet Read DC input Voltage Returns the DC input voltage reading in mV 12500 12 5VDC input Mene nope Firmware Version Returns firmware version currently Read Only 3 loaded on the module characters indicates values that are calibrated in the factory and are unit specific If the Radio Type is changed these will need to be re calibrated Show Display the configuration of the modem This will return a page of ASCII characters showing the main Company Confidential 16 Raveon Technologies Corp 4 9 Other non AT commands SHOW Showldisplay an overview of the radio s configuration ane Ping another modem Format is PING xxxx where xxxx is the ID of the modem to ping If re
19. e also set to expect ACK packets using the ATRB xx command To disable ARQ the default condition of the modem disable ARQ with the ATAK 0 and set retries to zero with the ATRB 0 command 6 Installation 1 Secure the M7 modem using the four mounting holes on the side flanges of the unit Connect a DC power source to the DC IN connection on the front of the modem Use the supplied cable and connect the RED wire to and the black wire to ground The black wire and the case of the M7 should be connected to earth ground Connect a good quality antenna tuned to the operating frequency to the RF connector on the front of the modem Use a good antenna and place is at as high above obstructions as possible A separation distance of at least 20 centimeters must be maintained between the transmitter s radiating structures and the body of the user or nearby persons Connect the computer terminal controller or other hardware device that will be using the M7 modem to its DB 9 serial I O connector using a shielded cable Secure it to the M7 with the two mounting screws on the sides of the DB 9 connector If the antenna is mounted out doors us a lighting arrestor in line with the antenna and properly ground the antenna and the M7 chassis to an earth ground Company Confidential 60 Raveon Technologies Corp 6 1 Debug Related Commands Bench Testing Must be in command mode to test Enter at the keyboard to put uni
20. em Wide Address 2 c ccissececssscessenancenecoeseesseceecnssecessestecenenseceesecedeasesneesdnsscsseaesensedeaees 22 Broadcast Transmiesions eee eee nennen nnne nene nnne nnn nens s nnne nnns ess nnne rise ases sn asse nns 22 HN EE 22 Addressing Example8 T 23 6 6 Error Correction tii a me e EE ER E RE HE D ER io eee 24 6 7 Store and Forward Repeating sss Error Bookmark not defined 7 Using the M7 Modem Streaming Mode Error Bookmark not defined 7 1 Streaming Mode Operation Error Bookmark not defined 7 2 Baud Rate Selection sese eee eee eee Error Bookmark not defined 7 3 BIUEITOIS inmi dese ran ns Error Bookmark not defined 7 4 Carrer Delect ret Race tein aad aei Error Bookmark not defined 7 5 Serial Data Flow Control Error Bookmark not defined 8i e Eer EE 29 9 FCC Licensing Information Error Bookmark not defined 9 1 Setting the Over The Air Data Rate Error Bookmark not defined 9 2 Debug Related Commands nr enema a eh tienes ee cre eden 26 10 M7 Diagnostic e Een CN 27 10 1 Overview of Diagnostics T 27 10 2 Reading the Diagnostic Information 27 10 3 Status and Statistics Commande 27 10 4 N eT Eu ue MEET 29 10 52 ATST2 Command TTT 29 10 6 ATSIS COmmMand TT 30 10 75 ATST4 Command EE 30 10 8 e EE 30 11 Tune up and Alignment Error Bookmark not defined Periodic Calibration
21. er AT Silence After Sequence Command the command characters The default BT and AT times are 500mS The default sequence for entering into AT Command Mode 1 No characters sent for a second 2 Input three 3 plus characters within 4 of a second 3 No characters sent for a second When the M7 modem first enters the Command Mode it sends the phrase M7 out it serial port and then an OK sequence The OK sequence is a sequence of 4 characters An O K CR and lt LF gt characters lt cr gt ASCII OD lt LF gt ASCII 0A 4 3 Setting a Parameter To set a parameter in the M7 modem enter the Command Mode as described above Then enter the proper AT command a space the parameter and then a carriage return For Example to set the address of the M7 modem to 1234 enter the following command ATDT 1234 CR Once a Parameter is changed the modem will begin using the new parameter and the new parameter is saved to non volatile 4 4 Reading a Parameter To read the value of a particular setting issue the command with no parameter The modem will return the value followed by an OK The modem s OK response is The value in ASCII decimal format A CR LF lt CD gt ASCII OD lt LF gt ASCII 0A An O K CR and lt LF gt sequence For example if the user enters the command to read the M7 s modem address and its address was 1234 the us
22. er of the roof 1 5 FCC Compliance Information This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment NOTE The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment Such modifications could void the user s authority to operate the equipment This product also complies with FCC Part Part 95 Subpart J of the FCC rules and regulations The Federal Communications Commission FCC with its action in ET Docket 93 62 has adopted a safety standard for human exposure to Radio Frequency RF electromagnetic energy emitted by FCC certified equipment This product meets the uncontrolled environmental limits as stated in OET 65C 01 01 when operated in accordance with the operation guidelines described in this manual Proper operation of this radio device according to the instructions in this publication will result in user exposure substantially below the FCC recommended limits This equipment generates uses and radiates radio frequency energy and if not installed and used in accordance with the instructions may cau
23. er would issue the following command ATDT lt cr gt and the modem will respond with 1234 CR lt LF gt OK CR lt LF gt To get on line help with a command enter the command and put a question mark in for the parameter For example to see what the ATDT command is for type ATDT The modem will respond by listing a brief description of the command To see a list of all commands type HELP 4 5 CONFIG Button If certain parameters within the modem are modified in a manor that causes the modem to cease functioning or if the user cannot enter the command mode via the method described above there is a small push button internal to the M7 modem to assist in this case This CONFIG button may be pressed at any time and forces the modem into a known operational state The CONFIG button is located inside the modem Remove the rear cover exposing the two circuit boards The button is in the center of the lower circuit board as shown below The default settings that the modem will revert to when the CONFIG button is pressed are 1 Serial port 9600 baud 8 data bits 1 stop no parity 2 ATCT setting set to 60000 60 second time out 3 Serial port on the front of the unit in RS232 mode 9600bps N 8 1 If the unit was configured for RS 485 RS 422 or Ethernet you must disconnect other devices and use an RS 232 device to configure the M7 Even though the serial baud rate reverts to 9600 baud when the CONFIG button
24. esults of the ANDing match and thus the data will be received Example 4 able to receive from a group xx34 where xx is any two digits Sending Destination Address 2234 Receiving M7 s Unit Address 1234 Receiving M7 s Address Mask 00FF Result Data will be received 2234 AND OOFF equals 0034 1234 AND OOFF equals 0034 therefore they match The results of the ANDing match and thus the data will be received 5 6 Error Correction The M7 modem has a built in error correction mode commonly referred to as Automatic Repeat request ARQ It works by checking each reception for errors and if the data is OK it sends a short ACK packet back over the air telling the sending station the data was OK The M7 modem uses a traditional Carrier Sense Multiple Access CSMA algorithm with randomized re try time slots to determine when to re transmit packets that must be re sent The duration between re tries increases as the number of attempts increases If received data has an error in it or if the receiving modem does not get the data due to interference the receiving modem does not send the ACK back and the sending station will automatically re send the data There are two aspects to configuring ARQ 1 Enable the ARQ mode in the modem to allow it to transmit ACKs ATAK 1 command This command enables the modem to transmit ACK packets 2 Configure the number of retries the modem should attempt if an ACK packet is not received b
25. if a particular reception was intended for the M7 modem The default Address Mask is FFFF which means all digits will be used Hexadecimal Numbers For those not familiar with hexadecimal numbers a hexadecimal digit represents a 4 bit binary pattern There are 16 possible values 0 1 2 3 4 5 6 7 8 9 A B C D E and F These 16 values represent 4 bits of information thus 4 hexadecimal digits can represent 16 bits of information The hexadecimal numbers represent 4 bit data in the following way Hexadecimal Table Hex Binary Hex Binary Hex Binary Hex Binary 0 0000 5 0100 8 1000 LC 1100 1 0001 6 0101 9 1001 D 1101 2 0010 7 0110 A 1010 E 1110 3 0011 8 0111 B 1011 F 1111 When communicating over the air M7 modems transmit their Unit Address and the Destination Address along with the data Receiving modems check the received Destination Address and see if it matches their Unit Address If it does match the receiving modem outputs the data it received via its serial port If it does not match the receiving modem discards the data and does not send it out the serial port Company Confidential 60 Raveon Technologies Corp Setting A System Wide Address If individual addressing is not needed in your system there are two ways to ensure it is not used One way is to set all modems in the system with the same Unit Address and destination address From the factory these are bo
26. is pressed and the IO port is RS232 it will revert back to the settings programmed into the M7 modem once the Command Mode is exited Note If the user interface is password protected and the Config button on the M7 is pressed for security reasons the encryption phrase is automatically erased 4 6 Exiting the Command Mode There are three ways to exit the command mode They are 1 ATCN Issuing the ATCN The M7 radio will exit the command mode and begin normal operation 2 EXIT Issuing the EXIT The M7 radio will exit the command mode and begin normal operation 3 Time Out After a pre set amount of time 60 seconds is the factory default time the modem will automatically exit the Command Mode and continue normal operation Changes will not automatically be saved This time out duration may be set with the ATCT command 4 7 Password Protection One M7 series products with firmware version CO or higher the user interface may be password protected If it is password protected the radio will output a password prompt when entering the command mode When in the command mode to enable the use of a password enter Password xxxx lt CR gt Where xxxx is the 2 7 digit password you would like to protect the user interface with To disable password protection enter Password 0 lt CR gt Note If the user interface is password protected and the Config button on the M7 is pressed for security reasons the encryption
27. mote access is enabled on XXXX xxxx it will respond Company Confidential 17 Raveon Technologies Corp 5 Using the M7 Modem Packet Mode 5 1 Setup 1 Connect a DC power source to the DC IN connection on the front of the modem 2 Connect a good quality antenna cut to the operating frequency to the BNC connector on the front of the modem Use a good antenna and place is at high above obstructions as possible 3 Connect a computer terminal or PC computer running HyperTerminal to the 9 pin I O connector The factory default serial ports settings are 9600 bps 8 data bits 1 stop no parity 4 Program the modem s operating frequency to your desired operating frequency This is done with the ATFX xxx xxxxx command See the section Serial Port Commands for information describing the various parameters that may be modified in the modem In most applications the default settings from the factory will work fine 5 Using the AT commands change any of the default operating parameters that must be modified From the factory the modems are configured and shipped ready to use Out of the box they will communicate on the default radio channel using the factory defaults In general the parameters you may want to modify will be ATHP x Channel number to use 1 5 ATMT 0 O for normal Packetized operation Default mode ATAK 0 for no ARQ 1 if this unit sends ACKs Default is no ARQ ATRB Set the number of retries if ARO is
28. neral Information about the RV M7 1 1 Congratulations Congratulations on your purchase of a M7 radio modem the most advanced radio modem of its kind available today Please take a few minutes to read this manual carefully The information presented here will allow you to derive maximum performance from your radio modem After reading it keep the manual handy for quick reference in case questions arise later on 1 2 NOTICE Besides the fuse there are no user serviceable points inside this transceiver All service work must be referred to your Authorized Service Center or Raveon Technologies Service Department 1 3 Safety Warning Information WARNING DO NOT operate theRV M7 VM radio modem when bystanders are within 2 feet 6 meters of the antenna Blasting Caps and Blasting Areas To avoid possible interference with blasting operations turn off this radio or remove the DC power when you are near electrical blasting caps in a blasting area or in areas posted Turn off two way radio Obey all signs and instructions Potentially Explosive Atmospheres Turn off your radio prior to entering any area with a potentially explosive atmosphere Do not install this product for use in areas with potentially explosive atmospheres Do not remove install or charge batteries in such areas Sparks in a potentially explosive atmosphere can cause an explosion or fire resulting in bodily injury or even death Note The areas wi
29. ogies Corp baud 8 data bits one stop and no parity If the baud rate was OK verify the AT BT and CT times that they are long enough for you to enter the string Symptom Long delay before transmitting Solution 1 Verify that serial port timeout is OK The ATR3 command sets the number of milliseconds that the M7 will look for in the serial input data stream If a pause greater than this value happens the modem will transmit If the ATGO parameter is set very large say 2000 this means 2 seconds and the modem may simply be waiting a long time Typical settings for this parameter are 20 20mS Symptom Cannot enter Command Mode Solution 1 Verify the serial port baud rate This is difficult if it is set wrong because you cannot enter the command mode to check it Try all possible baud rates and see if one of them works with the modem Alternately remove the rear cover of the modem and press the CONFIG button This will force the modem into the Command Mode as well as set the serial port to 9600 baud 8 data bits one stop and no parity If the baud rate was OK verify the AT BT and CT times that they are long enough for you to enter the string Solution 2 Handshaking You may have hardware handshaking enabled on your terminal program but the hardware or cable may not support it Disable hardware handshaking on your terminal program to verify this is the issue Symptom Modem appears dead Solution 1 Verify
30. onzale ener ener nnn RTS CTS DTR DSR CD aio EE 50 ohm BNC ewer NN B input and Ground Power a eT Ue e Phoenix 18 36 18 9 Raveon P N 1J165 3 11 kHz 12 5k 3 1 Frequencies The RV M5 VB N2 MURS modem has five user selectable channels The channel is selected with the ATHP command The RV M5 VB N2 modem is factory set to these five channels and the modem cannot be programmed to operate on any frequency other than these five 151 820 MHz 151 880 MHz 151 940 MHz 154 570 MHz 154 600 MHz Qn E GKM 3 2 Electrical Inputs and Outputs ei N d ee NO 1 i oeocoo j Mr O srar The front panel of the M7 modem has these features RF connector Power LED Status LED Receive data green TX red 9 Pin Serial UO connector DC Power Jack 3 3 LEDs The status LED visually show the current status of the radio Status LED TX This LED blinks red when the transmitter keys and is putting out RF power It blinks green upon the reception of data or RF carrier Power LED PWR This LED does a short blink once every two seconds indicating to the user that the power to the modem is ON and the modem is working When the modem is in the command mode this LED will blink on and off once per second 3 4 DC Power DC power for the modem is connected to the 2 pin DC power input jack labeled DC IN Use the supplied cable to connect the DC power The red wire is po
31. phrase is automatically erased 4 8 Command Mode Commands AT Command Description Parameters Factory Command Default Enable Disable ARQ When ARQ is enabled this modem 0 no AKCs will automatically send an ACK packet back to a modem that Range 0 1 sends it data O off 1 on Range 0 7 021200 5 38400 1 2400 6 57600 2 4800 72115200 3 9600 4 19200 Baud Rate Sets serial COM port baud rate bps Over the air throughput baud rate is set with ATR2 command If a PC s serial baud rate is set higher than the fixed over the air baud rate of the module hardware handshaking may be required Busy Channel Lock Out Enable disable the BCL If enabled the modem will not transmit on a radio channel that Range 0 1 is busy has RF on if 0 OFF 1 ON Configure Hardware Flow Control Enable 1 or disable 0 flow control When enabled the modem will monitor the RTS line and if it is negated stop sending data out the serial port If disabled the modem will ignore the state of RTS and always send out charators Exit AT Command Mode Exits module from AT Command Mode and returns it to Idle Mode Parameters are not saved in EEPROM 1 Enable 0 Disable received via the serial port within this time period in milliseconds modem returns to normal operation mode from Range 100 60000mS Command mode If the CONFIG button inside the M7 is pressed this parameter will be automatically set to 60000 Des
32. point data communication applications or for more sophisticated point to multipoint peer to peer or mesh networks Although the M7 is the easiest to use modem on the market its re programmability makes it extremely versatile Most parameters within the modem may be re configured to optimize it for specialized operations extended range or higher data throughput 2 1 Features e Built in radio transceiver with integrated modem e Easy to use Plug in Turn on and GO Transmit data in Receive data out e Lowest current draw in industry e Wide input voltage with high efficiency switching voltage regulator e Integrated Packet data protocol and built in Streaming Real Time operation e ARQ error correction and retransmission capability Totally transparent to the application e Capable of store and forward repeating operation e Small sized and very rugged extruded enclosure e 16 bit addressing for up to 65 525 different unique device addresses per channel e Supports group and broadcast transmissions Network mask allows groups of any size e 2 watts of RF output Other RF power levels available upon request e Easily configured using AT commands e Very fast Transmit to Receive turn around time e RS 232 serial input and output Programmable serial baud rates up to 57600 e Programmable over the air data rates for long range or high speed e Automatic key of transmitter on data e RF carrier detect is not required receiving
33. r baud rate of all modems is the same ATR2 command Solution 4 Verify Low Power Mode The M7 has an optional Low Power Mode LPM If LPM is enabled the M7 will power down whenever the DTR line of the serial port is turned off The Power LED will blink once every 10 seconds in the LPM mode The ATSM command is used to set or read the Low Power Mode ATSM 1 enables it and ATSM 0 disables it If LPM is used ATSM 1 then the M7 will turn off when the DTR line is off or the program connected to the serial port is closed or the RS 232 connector is un plugged Symptom Unit will not transmit Solution 1 Verify that CTS is wired Some devices that could be connected to the M7 will require the CTS signal to be asserted The M7 does assert this signal but if the wire is not connected you device may not be outputting data to the M7 If the TX LED blinks the M7 is transmitting data Every time data enters the modem the TX LED should blink Solution 2 Verify that serial port timeout is OK The ATGO command sets the number of microseconds that the M7 will look for in the serial input data stream If a pause greater than this value happens the modem will transmit If the ATGO paramter is set very large say 2000000 this means 2 seconds and the modem may simply be waiting a long time Solution 3 Verify that the radio channel is clear or BCL is off The ATBC 1 command enables Busy Channel Lockout If BCL is on the modem will not transmit on
34. rial l O Connechor eee Error Bookmark not defined Configuring for RS 422 eiiis tirer ede eerie Error Bookmark not defined Bias and Termination Resistors ee Error Bookmark not defined 47 Low Power Mode LPM Error Bookmark not defined User Serial Port Commande enee EEN 12 5 1 IGITAR 12 5 2 comma o Mode unica e 12 5 3 OMING KH 12 5 4 Reading ENEE 13 5 5 CONFIG Button geess e 13 5 6 Exiting the Command Mode cui rris cimo re rentur ctun creta dete daa tard eode c ud reda e ae Esa dee de 14 5 7 Password Proteccion da iaa ias 14 5 8 Restoring Factory Defaults eee eee Error Bookmark not defined 5 9 Command Mode Commande nnne nennn nena nnne n sensns ann nsns innere nr sese sse n narius 15 5 10 Other non AT commands ot erc a e EEN xU av EEN arva ee Se 17 5 11 Factory Default Settings AA Error Bookmark not defined Using the M7 Modem Packet Mode sss 18 6 1 SUL EE 18 6 2 Programming Channels and Ereduencies sees eee eee eee eee e 19 6 3 Data ANS MISSION 0 csi odos 19 Serial Port Baud Rate 2 0 0 0 cc cccccccccccceccesseeececeseauessececeeeseauesseeeeeeeseauesseceeeeeseaaesseeeeeeeseauesseeeeeeeseaaeeesees 19 A O 19 Packet ZE tiara aia de aia bil lid 20 Key On Dala cic cess ER 20 Busy Channel HR e 46 ca DIS 20 6 4 Data RECS EE 20 6 5 Addressing Packetized Mode only 21 Addressing e 21 Hexadecimal NUMBESIS EE 21 Setting A Syst
35. s signal any time there is a carrier detected The modem may be configured to assert this when an RF carrier is detected any on channel RF voice or data assert it only when another RF modem signal is detected or always assert it The operation of this line is configured with the ATR1 command The default is 1 asserts when M7 data is detected on the radio receiver DTR This line is an input to the M7 It is normally ignored because the default configuration of the M7 modem is to ignore this signal If the DTR line is enabled for use using the ATK5 1 command the DTR input line can be used to put the M7 modem into its SLEEP mode With DTR enabled anytime the DTR line is a logic 0 the M7 will be operating normally With DTR enabled anytime the DTR line is a logic 1 the M7 will go into a SLEEP mode drawing much less DC power Company Confidential 60 Raveon Technologies Corp 8 2 Null modem without handshaking Sometimes a Null Modem cable may be required to connect the M7 modem to another device The specific connections are very dependent upon the type of hardware and handshaking used but the following sections should help in configuring a null modem cable How to use the handshaking lines in a null modem configuration The simplest way is to don t use them at all In that situation only the data lines and signal ground are cross connected in the null modem communication cable All other pins have no connection An example of
36. se harmful interference However there is no guarantee that interference will not occur If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to correct the interference by one of the following measures Reorient or relocate the receiving antenna Increase separation between the equipment and receiver Connect the equipment to an outlet on a circuit different from which the receiver is connected Consult the dealer or an experienced radio TV technician 2 Overview The M7 RF data radio is a rugged high performance high speed narrow band data modem It contains a receiver a transmitter and modem creating an easy to use transparent data radio link The M7 s user interface is asynchronous RS 232 data into and out of the M7 CMOS level optional Modem operation is virtually transparent to the user and the configuration of the modem is via the user serial port Unlike any other radio modem on the market the M7 may be operated in either a Packetized Mode or a Streaming Real Time Mode There are advantages to each approach and your choice depends upon how your system operates For privacy and network versatility the M7 incorporates a 16 bit identification code Its protocol also uses a 16bit CRC to guarantee the integrity of the data Perfect for SCADA and telemetry applications the M7 can be used for simple point to
37. sitive and the black wire is negative Its connection is optional as the user may alternately apply power to Pin 9 and ground to pin 5 of the 9 pin I O connector m RON The M7 modem is supplied with a DC power cable Raveon part number 1C738 1 Note The M7 has in internal 3 amp mini fuse automotive type to protect it and its power source against reverse voltage and serious hardware failures In the event it is blown due to a reverse voltage it may be replaced by removing the internal circuit board and unplugging the fuse This must be done by a qualified electronic technician using ESD precautions RS232 EIA232 Serial l O Connector The RS232 9 pin serial I O connector is a female 9 pin D subminiature connector having the following pins configuration It is pinned out so that it may be plugged directly into a computer or PC s 9 pin COM port a 1 D 100000 0006 U D 6 Front view of DB 9 connector on modem female Pin Name Dir Function Level Specification 1 CD out Carrier detect If enabled indicates presence of carrier Logical 0 voltage on RS 232 means carrier is present If disabled it is asserted 0 whenever the modem is operational and not in the configuration mode It will be a 1 when the modem is in the configuration mode 2 RxD out Receive data Data out of the modem 3 TxD in Transmit data Data into the modem 4 DTR in Data terminal Normally
38. sor Along with handing all aspects of radio modulation and demodulation the microprocessor also maintains an extensive array of diagnostic information This section details the diagnostic information available and describes how to us the information to optimize or troubleshoot a M7 radio network 7 2 Reading the Diagnostic Information M7 diagnostic information is read using AT commands while the unit is in the Command Mode Refer to the section User Serial Port Commands to learn how to put the M7 modem into the Command Mode To see a general overview of how the modem has been operating us the ATST command status request command without any parameter The radio modem will respond with a list of certain operation statistics that it maintains All statistics start counting at 0 The ATST 1 command can be used to reset all statistics back to 0 except the run time timers Other operation and configuration statistics are available using the ATST command with a parameter to specify the desired statistic The following table describes the various statistics available 7 3 Status and Statistics Command AT Command Description Response Command pu P General Communication Statistics This command will cause the Statistics ST E MT to output a table of various operational statistics overview screen ST1 GPS Statistics Statistics related to the GPS operation if installed or GE overview screen ST2 Low level internal statistics
39. status interval in minutes The interval may be between 1minute an 65000 minutes 45 days The general format of the message that the modem will send is an ASCII STX character 02 BEGIN STATUS ATMY 1234 ATVR D1 ATDT 1234 ATVB 12300 UPTIME 120 OSERR 0 PRX 1295 PTX 7933 fan ASCII ETX character 03 The first character is a Start of Text character This is followed by the phrase BEGIN STATUS Each line in the status transmission is terminated with an ASCII carriage return OD and line feed 0A As new features are added to the M7 there may be new status lines added but all M7 modems with Revsion D or higher firmware support at a minimum the above shown status parameters The status transmission will end with an ASCII 0 character the End of Text character The parameters passed in the status message are ATMY The ID of the modem sending the status ATVR The firmware version in the modem ATDT The ID the modem is programmed to send data to ATVB DC voltage in millivolts of the DC input to the modem UPTIME Number of seconds since this modem has turned on OSERR The number of Operatin System Errors Normally this is O PRX The number of packets this modem has received Company Confidential 60 Raveon Technologies Corp PTX The number of packets this modem has transmitted The ID code that the status information is sent to is set with the ATMA xxxx command Whenever a status transmission is sent the
40. t into config test mode ATTD x Various transmit test routines 0 Go back to normal mode Stops the test 1 Random data transmit 2 Hop up down one channel 3 Force PLL to fast lock mode 4 Transmit all Os 5 Transmit all 1s 6 Enable the test points on the PCB 7 Transmit CW on center of channel 8 Transmit preamble 101010 pattern SHOW Display an overview of the configuration Ping xxxx Ping another modem over the air Transmits a request to xxxx to see if xxxx can hear the sending station If it does it answers with a response transmission containing its ID and the signal strength of the reception ATST Display statistics of how the modem is working ATST 1 Display statistics of how the modem s GPS is working if installed AT 5 Display RSSI It will scroll the reading until another character comes in the serial port Packet Counter The packet counter mode will output packet count statistics once per minute It will output the number of packets received in the last minute as well as the running total T ATPE Begin counting and displaying the packet counters every minute ATPE 1 Reset the packet counters back to zero ATPE 2 Stop counting and displaying packet counters Upon power up the packet counter feature is always disabled Company Confidential 60 Raveon Technologies Corp 7 M7 Diagnostic Provisions 7 1 Overview of Diagnostics Internal to the M7 radio modem is a powerful 32 bit microproces
41. th potentially explosive atmospheres referred to above include fueling areas such as below decks on boats fuel or chemical transfer or storage facilities areas where the air contains chemicals or particles such as grain dust or metal powders and any other area where you would normally be advised to turn off your vehicle engine Areas with potentially explosive atmospheres are often but not always posted 1 4 Safety Training information Antennas used for this transmitter must not exceed an antenna gain of 0 dBd The radio modem must be used in fixed vehicle mount configurations or at fixed base station sites It is not intended for portable applications This radio is restricted to occupational use work related operations only where the radio operator must have the knowledge to control the exposure conditions of its passengers and bystanders by maintaining the minimum separation distance of following range Failure to observe these restrictions may result in exceeding the FCC RF exposure limits Antenna Installation For rear deck trunk installation the antenna must be located at least the following range away from rear seat passengers and bystanders in order to comply with the FCC RF exposure requirements For model RV M7 VM Radiated frequency and Distance RV M7 VM 152MHz 1 97 Feet 0 6 m FCC ID SRS M7 VM Raveon Technologies Corporation For vehicular roof top installation the antenna must be placed in the cent
42. th set to 1234 and thus all modems can communicate with all other modems using the address 1234 The advantage of using this system wide address is that if there are other M7 modems on the channel but in some other system they probably will not have the same Unit Address and thus will not interfere with your system To reduce the possibility of data cross talk the system implementer may wish to use a different system wide address for the Unit Address instead of 1234 There are over 65 000 addresses available An alternate way to disable addressing altogether is set the Address Mask to 0000 ATMK 0000 command This tells the M7 to ignore the address and receive every transmission The disadvantage to this method is the adjacent system problem If there is another M7 system on the same channel all modems with the 0000 mask will receive them also Most users who do not use individual modem addressing choose to set a global system address and have all modems in their system use the same Unit ID and same destination address Broadcast Transmissions The double FF is used to identify a broadcast packet A transmission with a two digit FF in the first two positions of the destination ID or in the last two positions of the destination ID will be interpreted as a broadcast and any modem with an ID that matches the two non FF digits will receive the data For example sending data with a destination ID of 12FF will be received by any modem
43. the RTS and CTS pins Originally these pins are used for a question answer type of flow control When the full handshaking null modem cable is used there is no request anymore The lines are purely used for telling the other side if communication is possible The main advantage of this cable is that there are two signaling lines in each direction Both the RTS and DTR outputs can be used to send flow control information to the other device This makes it possible to achieve high communication speeds with this type of null modem cable provided that the system has been designed for it Company Confidential 60 Raveon Technologies Corp 9 Troubleshooting Symptom Unit will not receive Solution 1 Verify that the modem is on the correct RF channel If it is the RX LED should blink every time another modem tries to transmit to it If the RX LED does not blink when it should be receiving it is on the wrong RF frequency Soultion 2 If the addresses match and RX LED blinks but still no reception of data verify that the RTS signal is asserted The M7 will not output data if the RTS signal on the DB 9 I O connector is not asserted If the user s hardware cannot assert the RTS hardware line disable hardware flow control in the M7 modem using the ATCH 0 command Solution 3 If the RX LED blinks verify that the Unit Address of the sending modem matches the unit address of the receiving modem If this is OK verify that the over the ai
44. the power is on When the modem has good DC power the PWR LED will blink once per second If it is not blinking either the modem does not have power the modem is broken or the LEDs have been disabled via the ATLO command Solution 2 Verify the internal fuse OK There is an internal fuse in the RV M7 protecting it from reverse voltage and electrical failures If the power LED does not blink or come on when DC is applied check the fuse and replace it with the same type 3 amp mini fuse and try again If you replace the fuse the unit must be carefully check for damage and proper operation before being installed If you replace the fuse you must use a Littlefuse brand fuse part number 0297003 or Raveon part number 1X726 3 to maintain calibration of your unit Solution 3 Verify Low Power Mode The M7 has an optional Low Power Mode LPM If LPM is enabled the M7 will power down whenever the DTR line of the serial port is turned off The Power LED will blink once every 10 seconds in the LPM mode The ATSM command is used to set or read the Low Power Mode ATSM 1 enables it and ATSM 0 disables it If LPM is used ATSM 1 then the M7 will turn off when the DTR line is off or the program connected to the serial port is closed or the RS 232 connector is un plugged Symptom Repeater will not repeat Solution 1 Verify the repeater s Unit ID is unique An RV M7 configured to be a repeater will not repeat messages it originated If other uni
45. them Address Mask together ZZZZ AND them together Compare the two results from these two ANDs Output the data via serial port if the two results were identical One effect of this is that an address mask of 0000 will cause the M7 modem to received any data from any unit that transmits The Destination Address will effectively be ignored if the mask is set to 0000 Addressing Examples Example 1 default configuration Sending Destination Address 1234 Receiving Unit Address 1234 Receiving Unit s Address Mask FFFF Result Unit will receive the data because the addresses identically match When the addresses are identical the value of the mask is not important Notes This is the default configuration All units have address 1234 and all modems will talk to all other modems with address 1234 Example 2 a configuration that won t work Sending to Destination Address 1236 Receiving Unit Address 1234 Receiving Unit s Address Mask FFFF Result No data will be received because the address do not match and the address mask of FFFF requires that all digits in the address match Example 3 able to receive a data from a group 1230 123F Sending to Destination Address 1236 Receiving M7 Unit Address 1234 Receiving M7 Address Mask FFFO Company Confidential 60 Raveon Technologies Corp Result Data will be received 1236 ANDed with FFFO is 1230 1234 ANDed with FFFO is 1230 The r
46. tination Address to call Sets address of the modem to T send data to Note this parameter is entered in HEX format Range 0 FFFF Each digit may be a 0 1 2 3 4 5 6 7 8 9 A B C D E or an F Echo Character echo set on E1 or off EO This applies to l the Command Mode only Range 0 1 0 no echo N A Display frequencies Display all of the frequencies programmed into all of the channel memories Channel Number Select separate channels to minimize interference between multiple sets of modules operating in the Range 1 6 1 same vicinity Read Current Draw Read the current draw in mA Accuracy is within 2096 of actual current draw Enable Disable the LEDs 1 LEDs always off This reduces some power consumption 0 LED operate normally Address Mask Configures local and global address space Each digit may be a 0 1 2 3 4 5 6 7 8 9 A B C D E or F In Range 0000 FFFF most applications this is kept at FFFF Unit Address Configures the individual address for this unit MY Each digit may be a 0 1 2 3 4 5 6 7 8 9 A B C D E or F Note Range 0000 FFFF FF is interpreted as a group See addressing section BC CH CN CT D IC Range 0 9999 L 0 or 1 D Command Time Out If no valid commands have been Company Confidential 15 Raveon Technologies Corp Range 0 5 0 none 1 Odd 2 Even 3 Mark 1 4 Space 0 Number of Data Bits Set read the number of data bits Range 5 8 S
47. top Bits Selects the number of stop bits Range 1 2 RF Power Output Set or show the RF power output setting Value is in percent from 096 to 4096 Use and RF wattmeter to 0 40 confirm the power setting and adjust the accordingly to obtain the desired RF power level Serial Port time out Number of mS of no activity on the Ranae 1 5000 serial port before transmitting the data in its buffer ge Receiver Signal Level Reads the Receiver Signal T strength this instant and returns the level in dBm Ranges 1a Bm RSSI Receive Signal Strength Indicator Returns the signal level of last received packet The reading is in dBm Usable for relative comparison of signals but absolute value is within10dB at 90dBm Disable Remote Access When enabled set to a 0 the modem will respond to over the air RPR requests Pings and over the air commands Default is OFF 1 Parity Selects parity format Settings 0 4 transfer 8 bits over antenna port and generate the parity bit on the RF receiving side No parameters Returns a number 50 to 140 dBm varies by model 0 Remote Access on 1 Remote Access off configuration parameters Statistics Show the unit s operational statistics See Statistics section of user manual Save Save all the parameters to EEPROM This command must be used if changed parameters are to be stored in non volatile memory and used next time the modem is powered up Mo
48. ts in the system have the same ID as the repeater the repeater will not repeat them because it thinks the it originated the transmission Set the MTID of the repeater to a unique ID number Company Confidential 60 Raveon Technologies Corp 10 Mechanical Optional MCX GPS Connector ber es 2 859 90 144 GPL 4 600 p Wheless Das EK Seta Ger Re pwr O MO 3 089 Company Confidential 60 Raveon Technologies Corp Limited One Year Warranty If within one year from date of purchase this product fails due to a defect in material or workmanship Raveon Technologies Incorporated will repair or replace it at Raveon s sole discretion This warranty is extended to the original consumer purchaser only and is not transferable This warranty does not apply to a product damage caused by accident dropping or abuse in handling acts of God or any negligent use b units which have been subject to unauthorized repair opened taken apart or otherwise modified c units not used in accordance with instructions d damages exceeding the cost of the product e batteries f the finish on any portion of the product such as surface and or weathering as this is considered normal wear and tear g transit damage initial installation costs removal costs or reinstallation costs h damage due to lighting floods fire or earthquakes RAVEON TECHNOLOGIES INCORPORATED WILL NOT BE LIABLE FOR INCIDENTAL OR
49. ver the air in the ARQ mode Pkts last minute nnn Number of packets received during the last minute UART errors nnn serial port framing and overrun errors Usually these are caused by incorrect serial port settings OK If there is a hardware problem there may be one ore more hardware error messages listing the error types CPU Exceptions OS Rebooted or Fatal OS failures Consult the factory if any of these messages ever appear 7 9 ATST2 Command The ATST2 command will return additional lower level statistics RF FIFO overruns nnn numberoftimes the modem was too busy to receive data over the air Wrong address nnn packets with addresses intended for some other unit Also will count apparent false packets due to random noise Duplicate packets nnn numberof packets discarded because they already were received and subsequently re received due to ARQ mode or a repeater Missing ACKs nnn number of transmissions in ARQ mode where this sending M7 did not receive an ACK back as it expected to TX FIFO overflows nnn number of bytes of data that came into the M7 over the air and there because there was no buffer space for the data were discarded If greater than 0 the serial port baud rate should in increased RX FIFO overflows nnn numberof bytes of data came into the M7 s serial port and there was no room in the M7 to buffer the data before transmission so these bytes were discarded If greater than 0 flow
50. with a unit ID 1200 through 12FF Sending data with a destination ID of FF34 will be received by any modem with a unit ID of 0034 through FF34 The Address Mask The reason to use hexadecimal digits to represent the unit address is that along with the Unit Address programmed into the M7 there is an Address Mask programmed into it The default mask is FFFF The address mask is also used to determine if a particular data transmission should be received by the modem For most applications where one modem talks to one modem or where all modems in the system communicate with all other modems in the system the Address Mask should stay set to FFFF Only in systems where some modems should only talk to certain other modems might you want to change the address mask Whenever data is received over the air the Destination Address of the transmission is logically ANDed with the Address Mask in the receiving modem This is the Effective Destination Address The receiving M7 also ANDs its own Unit Address with its Address Mask The result is the Effective Unit Address The Effective Unit Address is compared to the Effective Destination Address and if the two are identical the data will be received Company Confidential 60 Raveon Technologies Corp Note Logically 1AND1 1 OANDO 0 1ANDO 0 OAND1 0 Figure 1 Address Filtering M7 receives data over the air to Destination Address XXXX M7 has Unit Address yyyy M7 has AND
51. ws applications which use the serial port such as HyperTerminal put large gaps between the bytes of data they send out the serial port If an application is not getting the desired throughput verify that it is not an artifact of the Operating System or the computer Flow Control If large amounts of data will be sent with the M7 it may be possible to overflow the internal data buffer To ensure the transmit buffer does not overflow enable and use hardware flow control Hardware flow control is enabled with the ATCH Company Confidential 60 Raveon Technologies Corp 1 command Note that the M7 modem will always indicate the status of its internal buffer using the CTS signal on the DB 9 serial connector When CTS is negated the internal buffers are more than 80 full When it is asserted and it is Clear to Send the buffers are less than 80 full Packet Size The over the air packet size may be set with the ATTT xx command Once the modem receives one full packet of data into via the serial port it will automatically key the transmitter and send the data Factory default is 80 bytes Key On Data When serial data is entering the M7 s RS 232 port the M7 looks for pauses in the data as indication that it is time to send a packet of data over the air The factory default duration of the pause it looks for is 20mS but the user may change this to over values using the ATR3 xxx command where xxx is in milliseconds Busy Channel Lo
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