1. DL manuals
  2. Raveon
  3. Modem
  4. RV-M7
  5. Technical Manual

Raveon RV-M7 Technical Manual

Other manuals for RV-M7: Technical Manual
Manual is about: Data Radio Modem

Summary of RV-M7

  • Page 1

    Rv-m7 data radio modem technical manual version e2 november, 2014 ip65 "weatherproof” version raveon technologies corporation www.Raveon.Com.

  • Page 2

    Rv-m7 technical manual 2 table of contents 1. General information about the rv-m7 ................................................................................................ 4 1.1 congratulations! .....................................................................................................

  • Page 3

    Rv-m7 technical manual 3 packet size ............................................................................................................................................................................ 34 key-on_data ..............................................................................

  • Page 4

    Rv-m7 technical manual 4 dtr ....................................................................................................................................................................................... 59 cd output data framing ................................................................

  • Page 5

    Rv-m7 technical manual 5 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...

  • Page 6

    Rv-m7 technical manual 6 etsi en 300 113-2 v1.4.2 (09) etsi en 301 440-2 v1.4.1 (10) etsi en 301 489-1 v1.8.1 (08) etsi en 50 385 (02) etsi en 301 489-3 v1.4.1 (02) etsi en 301 489-5 v1.3.1 (02) european automotive emc directive: 2004/104/ce electrical safety: en 60950-1 :2006/a11 :2009 the followin...

  • Page 7

    Rv-m7 technical manual 7 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...

  • Page 8

    Rv-m7 technical manual 8 3. Specifications 3.1 general all measurements made per tia-603-b frequency: model rv-m7-va (non-us frequency; except military) ............................................. 136 - 155mhz model rv-m7-vb.............................................................................

  • Page 9

    Rv-m7 technical manual 9 3.5 model numbers the model number of the m7 modem identifies its operating frequency band, rf power level, and bandwidth. The models are: rv-m7-ab-c-oo where: a = the band (v=136-174mhz, u=406-512mhz) b = sub band (a,b,c,…) c = channel spacing (blank=12.5khz, w=25khz) oo = ...

  • Page 10

    Rv-m7 technical manual 10 4. Electrical inputs and outputs the front panel of the m7 modem has these features: 1. Rf connector 2. Power led 3. Status led (receive data = green, tx = red) 4. 9-pin serial i/o connector 5. Dc power jack 4.1 leds the status led indicates the current status of the radio....

  • Page 11

    Rv-m7 technical manual 11 4.3 rs-232/eia232 serial i/o connector the rs-232 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. Front-view of db-9 co...

  • Page 12

    Rv-m7 technical manual 12 note: rs-232 signals use positive and negative voltages to represent digital 1s and 0s. A positive voltage is a 0, and a negative voltage is a digital 1. This pin-out enables the radio to be directly connected to a computer’s 9-pin serial port using a conventional 9-pin rs-...

  • Page 13

    Rv-m7 technical manual 13.

  • Page 14

    Rv-m7 technical manual 14 4.5 -wx 5-pin circular i/o connector pin-out a) rs-232 serial cable for –wx version the rs-232 serial cable uses at hirose connector, part number hr30-6p-6s(71). B) rs-422 connector pin-out on –wx 5-pin circular connector if the rs422 option is installed in the m7 (-wx opti...

  • Page 15

    Rv-m7 technical manual 15 4.6 optional eia-485/rs-485 serial i/o rs-485 connector pin out rs-485 is a two-wire connection, with the pair of wires transmitting and receiving data. With the rs-485 enabled ( atio 2 command), the 9-pin serial i/o connector on the front of the m7 is a female 9-pin d- sub...

  • Page 16

    Rv-m7 technical manual 16 if you wish to run the rs-485 in full-duplex mode using two m7s, the interface must be wired with two separate pairs of wires; a&b on one pair, and out+ & out- on the other pair. The m7’s rs-485 i/o circuit uses 3.3v logic to drive the lines, and the rs-485 pins are esd pro...

  • Page 17

    Rv-m7 technical manual 17 phoenix contact/tyco makes a convenient db-9 to terminal-block connector, part number 2761839. 4.7 rs422/eia-422 serial i/o connector rs-422 communications uses 4-wire differential signals. The rs422 9-pin serial i/o connector is a female 9-p d-subminiature connector having...

  • Page 18

    Rv-m7 technical manual 18 serial out data comes out pins 3 and 7. Serial input data comes in via pins 4 and 8. Connect pin 5 to earth ground. 4.8 low power mode (lpm) the m7 modem, has the ability to be put into a low power sleep mode (sm). In sm the modem draws much less current from the dc input. ...

  • Page 19

    Rv-m7 technical manual 19 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 hy...

  • Page 20

    Rv-m7 technical manual 20 once a parameter is changed, the modem will begin using the new parameter and the new parameter is saved to non-volatile. 5.4 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 ...

  • Page 21

    Rv-m7 technical manual 21 5.6 config button if certain parameters within the modem are modified in a manner 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...

  • Page 22

    Rv-m7 technical manual 22 even though the serial baud rate reverts to 9600 baud when the config button is pressed and the io port is rs-232, 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 co...

  • Page 23

    Rv-m7 technical manual 23 5.9 command mode commands at command command description parameters factory default atak enable/disable arq – when arq is enabled, this modem will automatically send an ack packet back to a modem that sends it data. 0=off, 1=on. Range: 0 – 1 0 (no akcs sent) atat silence af...

  • Page 24

    Rv-m7 technical manual 24 when the line is negated). 0 = disable atcs set automatic on-line after atdt command – 0: stay in command mode after exiting atdtxxxx command. This is the default configuration. 1: exit command mode after receiving an atdtxxxx command. See technical bulletin an163 for more ...

  • Page 25

    Rv-m7 technical manual 25 current channel number. Atgp group number – set/read the group number for this unit. 0 means ignore the group number. 1-255 is a group identifier. Only m7s with the same group number will communicate together. 0-255 0 (ignore group numbers) ath0 hang-up – tells the m7 to st...

  • Page 26

    Rv-m7 technical manual 26 atmt protocol select – the over-the-air communication protocol. 0=packetized mode, 2=streaming data. Range: 0-2 0 at my unit address – configures the individual; address for this unit. Each digit may be a 0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,or f. Note: ff is interpreted as a grou...

  • Page 27

    Rv-m7 technical manual 27 atr8 frequency offset. Used to set the radio on the center of the radio channel. Range: -500 to +500 0 ** atrb number of retries . If this modem does not get an ack back when it sends data, this is the number of times it will re- transmit the packet and wait for an ack. 0=d...

  • Page 28

    Rv-m7 technical manual 28 5 = tx all 1s 6 = test points on 7 = transmit cw 8 = transmit 1010101… atte read product temperature – read the internal temperature of the unit’s circuit board in degrees celsius. -40 to +99 - attt max packet size – set the maximum number of bytes in an over-the-air packet...

  • Page 29

    Rv-m7 technical manual 29 that the radio is tuned to cover. Config display the m7’s configuration. 0, 1, or 2 - model read model number. Read the model number. None - ping ping another modem. Format is ping xxxx, where xxxx is the id of the modem to ping. If remote access is enabled on xxxx, it will...

  • Page 30

    Rv-m7 technical manual 30

  • Page 31

    Rv-m7 technical manual 31 6. Using the m7 modem – packet mode this section describes the operation of the when it is in the packet mode of operation. Packet mode is the factory-default operating mode. It is the easiest and most reliable mode of operation for a modem. Note: the configuration of the m...

  • Page 32

    Rv-m7 technical manual 32 figure 1 (packet mode of operation) for operation of the modem in the streaming data, non-packetized mode, see the section streaming mode on page 41 . The packet or streaming operation is configured using the atmt command, with packet mode being the factory default. 6.1 set...

  • Page 33

    Rv-m7 technical manual 33 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. 6. Connect your serial data device to the 9-pin connector on the front of the modem. The radio is now ready to u...

  • Page 34

    Rv-m7 technical manual 34 utilization is only about 50%. But, if the serial port baud rate is set much higher, say 2-8x the over- the air rate, the channel utilization becomes near 100%. Because the m7 can handle serial-port data rate far in excess of the over-the-air rate, the efficiency of the m7 ...

  • Page 35

    Rv-m7 technical manual 35 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...

  • Page 36

    Rv-m7 technical manual 36 its serial port. If it does not match, the receiving modem discards the data, and does not send it out the serial port. 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 mo...

  • Page 37

    Rv-m7 technical manual 37 ` figure 2 (address filtering) 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 and all data received if the mask is set to 0000. Listen address ...

  • Page 38

    Rv-m7 technical manual 38 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 ma...

  • Page 39

    Rv-m7 technical manual 39 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 addr...

  • Page 40

    Rv-m7 technical manual 40 figure 3 overview of repeater operation in the example shown in figure 3 above, m7 a is will communicate with all other modems in the system. It can directly communicate with b, h , and f . Because of propagation limits, it cannot communicate reliable to e, d, c, and g . To...

  • Page 41

    Rv-m7 technical manual 41 m7 unit id (atmy) destination (atdt) network mask (atmk) repeat source repeat source mask repeat destination repeat destination mask addresses programmed into unit repeater table programmed into unit a 1000 1000 ff00 - - - - b 1010 1000 ff00 1020 ffff 1000 ffff 1000 ffff 10...

  • Page 42

    Rv-m7 technical manual 42 there can be an issue with regard to store-and-forward repeating and busy channels, particularly on polled systems. Raveon’s m7 wireless modem has a number of provisions in it to make store-and- forward repeating work smoothly. For example, in the diagram above, assume a is...

  • Page 43

    Rv-m7 technical manual 43 7. Using the m7 modem – streaming mode this section describes the operation of the streaming mode of operation. This mode is selected with the command atmt 2 . 7.1 streaming mode operation in streaming mode, radio transmissions will begin whenever data enters the mode, and ...

  • Page 44

    Rv-m7 technical manual 44 enters the modem. When the buffer is empty and there is no more data coming into the modem, it will automatically de-key the radio and go back into the receive mode. The m7 modem will send a hidden end-of-message signal to the receiving modem, thus avoiding any extra data b...

  • Page 45

    Rv-m7 technical manual 45 7.6 setting the over-the-air data rate the m7 has programmable over-the-air baud rates. The over-the-air rate is stored in register r2, and is programmed with the atr2 x command, where x is a number corresponding to the rate. The are many possible baud rates, but not all ra...

  • Page 46

    Rv-m7 technical manual 46 other data rates of 0(800bps), 2(2400bps), 3(4800bps), and 7(9600bps) will work, but have a less optimal bit-error-rate vs. Receive sensitivity. Rv-m7-uc-w (wide-band version) for high-speed operation , set r2 to 5 (9600 baud). For best range (longest distance), set r2 to 1...

  • Page 47

    Rv-m7 technical manual 47 8. Installation 1. Secure the m7 modem using the four mounting holes on the side flanges of the unit. 2. 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...

  • Page 48

    Rv-m7 technical manual 48 the fcc website also offers a list of frequency coordinators. These are private organizations officially certified by the fcc to help you through the process, and who in most cases will handle the actual filing of your application. With few exceptions, you must apply for an...

  • Page 49

    Rv-m7 technical manual 49 1.1.1.2 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 re...

  • Page 50

    Rv-m7 technical manual 50 11. M7 diagnostic provisions 11.1 overview of diagnostics internal to the m7 radio modem, is a powerful 32-bit microprocessor. Along with handing all aspects of radio modulation and demodulation, the microprocessor also maintains an extensive array of diagnostic information...

  • Page 51

    Rv-m7 technical manual 51 st9 reset all statistics counters ok st10 statistic read – returns numeric values, comma separated, of all statistics as described in the st command. Run time display screen.

  • Page 52

    Rv-m7 technical manual 52 11.4 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 :...

  • Page 53

    Rv-m7 technical manual 53 11.6 atst3 command the atst3 command, will return the time and date the firmware in the m7 was compiled. 11.7 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...

  • Page 54

    Rv-m7 technical manual 54 12.2 calibration commands the following at commands are used to calibrate the m7. Do not ever change these unless you have been factory trained to do so. At command command description parameters factory default r0 symbol peak deviation – set the peak fm deviation of the tr...

  • Page 55

    Rv-m7 technical manual 55 2. The modem will now put out cw on the center of the channel. 3. Read the frequency offset with the atr8 command. 4. Adjust the frequency to the center of the channel with the atr8 command. You can use the “u” key and the “d” key to change the settings up and down one valu...

  • Page 56

    Rv-m7 technical manual 56 13. Skyline compatibility 13.1 general the m7 rf modem has built-in compatibility with a radio modem made by sonik technologies, vytek wireless, and cal amp called the skyline . In most applications, raveon’s m7 modem can communicate with skyline modems, provided the m7 is ...

  • Page 57

    Rv-m7 technical manual 57 note: the maximum permissible exposure (mpe) for this product was computed using a 0db gain antenna, and must be recalculated if a gain antenna is used. Height try to locate the antenna as high above obstructions, vehicle, and buildings as possible. Uhf and vhf radio channe...

  • Page 58

    Rv-m7 technical manual 58 15. Appendix a. Serial port hardware 15.1 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...

  • Page 59

    Rv-m7 technical manual 59 cd on this line the modem indicates to the dte that it has received a carrier from a remote device. It will assert this 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),...

  • Page 60

    Rv-m7 technical manual 60 15.2 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...

  • Page 61

    Rv-m7 technical manual 61 null modem with full handshaking (db-9 female shown. Same wiring for male-to-male cable) connector 1 connector 2 function 2 3 rx tx 3 2 tx rx 4 6 dtr dsr 5 5 signal ground 6 4 dsr dtr 7 8 rts cts 8 7 cts rts 15.5 compatibility issues the null modem cable with full handshaki...

  • Page 62

    Rv-m7 technical manual 62 normally, the serial i/o connector operates like an rs-232 serial interface. If the mimic mode is enabled, the operation of the radio is modified to transmit the digital status of the input0 and input1 pins across the radio link, and output their status on the out0 and out1...

  • Page 63

    Rv-m7 technical manual 63 17. 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 wr...

  • Page 64

    Rv-m7 technical manual 64 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 th...

  • Page 65

    Rv-m7 technical manual 65 18. Mechanical.

  • Page 66

    Rv-m7 technical manual 66 limited two year warranty if within 24 months from date of purchase, this product fails conforms to raveon technologies corporation’s (the company) published specifications for the model purchased due to a defect in material or workmanship, raveon technologies corporation w...

  • Page 67

    Rv-m7 technical manual 67 warranty service is available by mailing postage prepaid to: raveon technologies corporation 2461 impala drive carlsbad, ca 92010 - usa to obtain warranty service, include a copy of the original sales receipt or invoice showing the date, location, and price of purchase. Inc...