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RV-M7-V WEATHERPROOF GPS TRANSPONDER

The Raveon model M7 GX VHF GPS transponder is a rugged high-speed VHF data radio with a built-in 12-channel GPS receiver. The M7 GX is the heart of a RavTrack AVL system.  Its internal GPS receiver determines its position and time, and its radio modem transmits GPS position, ID code, and status over-the-air at user-programmable times.  A TDMA channel access method ensures that even hundreds of vehicle are able to transmit, and not interfere with each-other.

The unit is housed in an IP65 rated enclosure the is dust-tight, and allows the unit to be sprayed with water.

It has up to 5 watts of RF (radio frequency) power output, dual-bandwith IF for both wide and narrow channels, and operates as both a GPS transponder for tracking, and a data radio modem for sending and receiving data.  Connect DC power, and VHF antenna, and a GPS antenna, and you are ready to track position and time.

The RV-M7 GPS transponders may be configured for a number of different GPS applications, including:

 

Transponder: At programmable intervals, transmit position and status. Radio receiver is disabled for low-power consumption.
GPS display: Connect an RV-M7 to a hand-held or mobile GPS display, and icons will appear on the display showing the location of all other RV-M7 radios in the system.
Radar Display: Radar Display: Connect RV-M7 to a marine ship plotter or radar display, and icons will appear on the display showing the location of all other RV-M7 radios in the system.
RavTrack PC: Connect the RV-M7 to a Windows PC running RavTrack PC (or other PC software) to view a map showing location, status, log movement, set alerts, and make reports from the data.
 Repeater: Any M7 GX transceiver may be configure to also be a store-and-forward repeater.   Store and forwarding repeating is when a radio automatically re-sends any message it receives.  Locating a store-and-forward repeater on a tall building, tower, or mountain can greatly increase the coverage of a radio system.

 

As well as transmitting its position and status over the air, the M7 GX also has a radio modem with integrated RS232/422/485 interface for sending and receiving data.

For privacy and security, over-the air encryption is standard on every M7 GX radio. For network versatility, the M7 GX incorporates a 16-bit identification code, allowing up to 65,000 objects to be identified in one system. For wide-area coverage, all M7 GX transponders may be set to store-and-forward messages from other M7 GX transponders. Although the M7 GX is the easiest to use radio modem on the market, and makes the easiest to set-up Automatic Vehicle Locations (AVL) system available, its re-programmability makes it extremely versatile.  Most parameters within the modem may be reconfigured to optimize it for specialized operations, extended range, or higher data throughput. Click here for an overview of the internal workings of the M7 transponder.

The M7 GX transponder may be configured using its built-in serial port.  Raveon provides a software program called Radio Manager to configure the M7 GX. More Details…

The M7 GX has a number of different I/O drivers built into it, allowing it to work with a large range of displays, computers, and PC software applications.  Raveon’s M7 GX transponders have an open software interface, and details of all serial-port messaging is publicly available.

  • Transmissions include ID, position, speed, heading, temperature, voltage, input/output status, UTC time, and proximity.
  • Able to transmit up to 200 position reports in 10 seconds.
  • Outputs NMEA 0183 GLL, TLL, WPT, GSV, WPL, RMC, and PRAVE messages.
  • High-speed over the air data rates. 19200bps in 25kHz channel, 9600bps in 12.5kHz
  • Ultra-fast TX-RX switching and 4-level GFSK modem allows truly “Real Time” tracking and status.
  • Built-in TDMA channel access allowing truly real-time tracking (200 transmission in 10 seconds)
  • Very low current draw. As low as 30mA average
  • 16 bit addressing for up to 65,525 different unique IDs per channel.
  • Programmable proximity alert ( 1-9999 meters) and programmable position report rate (1-9999 seconds).
  • Programmable speed alert.
  • Programmable I/O trigger alerts.
  • Programmable distance-moved alert.

All measurements made per TIA-603-B
General

  • A range frequency………………. Model RV-M7-VA-GX-WX (136-155MHz for export)
  • B range frequency ……………… Model RV-M7-VB-GX-WX (150-174MHz)
  • Size …………………… 5.0 X 3.76W X 0.95H
  • Weight ………………. 6 ounces (0.17kg)
  • DC input voltage ………………. 10-16V DC
  • Typical current draw, 12V in, GPS mode 2 or higher…… <75mA
  • Typical current draw, 12V, GPS mode 1 …………………… <35mA
  • Current draw when transmitting data …………………….. <2.5A max, 1.2A typical at 2watts / <2.7A at 5watts
  • Sleep Mode standby current (hardware control) ………………. <1mA
  • Frequency stability ………………. ±2.5ppm
  • Over-the-air baud rates (programmable) ………………. 800, 1200, 2400,4800, 8000, 9600
  • Internal data buffers (transmit and receive) ………………. >2000 bytes
  • Operating temperature range ………………. -30ºC to +60ºC (-30ºC to +80ºC storage)
  • TX-RX and RX-TX turn-around time ………………. <5mS
  • Power on time to operational …………………….. <500mS
  • LPM Standby to operational ………………………. <20mS
  • Internal fuse 3A mini blade. Littlefuse part number 0297003 or Raveon part, number 1X726-3
  • FCC ID Model RV-M7-VB ………………. SRS-RV-M7-VB (pending approval)

Transmitter

  • Maximum RF power output …………………. ½ – 5 watts
  • Maximum duty cycle …………………………… 50% at 2W, 25% at 5W
  • Maximum transmit frequency deviation ………………. ± 2.25kHz narrow, ± 3.0kHz wide
  • RF Bandwidth ………………………… Full band, no-tune
  • Occupied bandwidth ………………. 11 kHz (12.5kHz channels) / 15.3kHz (25kHz channels)
  • TX spurious outputs ………………. < -70dBc
  • Emissions designator………………. 11K0F1D (12.5kHz channels) / 15K3F1D (25kHz channels)

Receiver

  • Typical RX sensitivity (1% BER)
    ……………….9600bps, 4-level, narrow channel -108dBm
    ……………….4800bps, 2-level -115dBm
    ……………….1200bps, 2-level -119dBm
  • No-tune bandwidth ………………. full band
  • RX selectivity ……………………….. -50dB (12.5kHz channel spacing) / -65dB (25kHz channel spacing)
  • Spurious and image rejection ………………. -75dB
  • RX inter-modulation rejection ………………. -70dB
  • Conducted spurious emissions …………….. <-53dBm

User Input and Output Signals

  • Serial port baud rates ………………. 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
  • Voltage levels …………………………. RS-232 ( RS-422, and RS-485 optional)
  • Modem handshake signals ……….. RTS, CTS, DTR, DSR, CD
  • Transceiver RF ………………………… 50 ohm TNC
  • GPS Connection ………………………. SMA 50 ohm, 3.3V for amplified antenna
  • Power ……………………. B+ input and Ground
  • Digital Inputs …………..1
  • Power Connector ……..

GPS and Transponder Specifications

  • Number of channels ………………. 12
  • Horizontal accuracy (24 hour static) …….. <2.5m 50%, <5m 90%
  • Acquisition (-130dBm, 50%) …. …………… <40sec cold start, <10sec hot start
  • Sensitivity Tracking …………………………… -150dBm, Acquisition -142dBm
  • NMEA Output sentences …………………….. WPL, TLL, GLL, GSV, PRAVE
  • Position report rate, programmable …….. 1 to 9999 seconds
  • Position report resolution …………………… 0.0001 degrees
  • Voltage report resolution/accuracy ………. 0.1V/10%
  • Temperature resolution and accuracy ….. 2 degrees C/2 degrees C
  • Velocity resolution and accuracy ………………. 1km / 1km per hour
  • GPS connector ………………. SMA
m7wx_md.jpg

 

Model: RV-M7-VA-GX-WX (Export model)

  • RV-M7 Transceiver in IP65 weatherproof housing, built-in GPS, 136-155MHz, TNC RF connector, and SMA GPS connector.  Waterproof 6-pin circular I/O connector, and 3-pin circular DC power connector.
  • DC power cable. 3-pin circular connector, 6 feet long.
  • Quick-start guide.

Model: RV-M7-VB-GX-WX

  • RV-M7 Transceiver in IP65 weatherproof housing, built-in GPS, 150-174MHz, TNC RF connector, and SMA GPS connector. Waterproof 6-pin circular I/O connector, and 3-pin circular DC power connector.
  • DC power cable. 3-pin circular connector, 6 feet long.
  • Quick-start guide.

RV-M7 GX VHF Datasheet for UHV M7 GX

  User Manual (pdf)   The Technical Manual for the M7-GX GPS Transponder

  Firmware Revision Log  List of major changes to the M7 firmware.

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