M7 VHF Data Modem

 

 

General Features:

• Small enclosure contains both a VHF radio transceiver and modem

• RF power is programmable from 1/2 to 5 watts RF output. 

• Compatible with MODBUS and DNP-3.

• 6 channel memories each fully programmable across the band.

• Wide(25kHz) or narrow(12.5kHz) bandwidth may be selected on a channel-by chanel basis.

• Maximum over-the-air data rate of 19200 bps in 25kHz, 9600 bps in a 12.5kHz channel.

• Small size 4.60” X 2.60” X .956 (11.7cm X 6.6cm X 2.43cm)

• Very low power consumption (<65mA in RX mode)

• RS232 serial I/O is standard.  RS422/485 optional.

• Outstanding communication range. 5-60 miles typical.

• Easy to use and configure.

• Packetized operation or real-time streaming data.

• Store-and-forward repeater capable. User-programmable.

• Internal GPS option available.  Programmable update rates and protocol.

• TDMA (optional) or carrier-sense(standard) channel access.

• Built-in radio diagnostics AND remote diagnostics. Monitored: DCV, Current, and temperature

• Powerfull 32 bit CPU with base-band Digital Signal Processing for exceptional sensitivity

• Low-power modes for extended operation off of solar or batteries.

• Serial port baud rates and flow-control are programmable from 1200 through 115K baud.

• Automatic ARQ error correction may be enabled

• FCC approved for parts 22 and 90. FCC ID: SRS-M7-VB

• 2-watt version FCC appoved for parts 95j (MURS). FCC ID: SRS-M7-VM

• Industry Canada approved: IC8386A-RVM7VB

Specifications

 

General

• DC Input Voltage ..................................................10-16V DC

• Receive Current Draw.........................................<65mA (55typ at 12VDC)

• Transmit Current Draw (5W)............................. < 2.7A

• Transmit Current Draw (2W)............................. < 1.2A

• SIze .......................................................................4.60” X 2.60” X .956 (11.7cm X 6.6cm X 2.43cm)

• Frequency, RV-M7-VA (export only)................. 136-155MHz

• Frequency, RV-M7-VB ....................................... 150-174MHz

• Channel Spacing ............................................... 12.5kHz, 25kHz, 30kHz

• Number of channel memories ....................... 6

• Channel parameters ........................................ TX frequency, RX frequency, IF bandwidth

• ID codes ............................................................. 65,536 plus 254 group codes

 

Transmitter

• RF Power Output ........................... 500mW – 5.0 W programmable

• Maximum Duty Cycle ............... 100% @ 2W to 40C, 25% @5W (100% w/ optional heatsink)

• Frequency Deviation ......................... ± 2.2kHz (narrow) ± 3.5kHz (wide)

• RF Bandwidth..................................... complete band

• Occupied bandwidth......................... 11 kHz (-N) 16kHz(-W)

• TX Spurious outputs.......................... < -70dBc

• TX Harmonic output .......................... < -80dBc

• Occupied Bandwidth......................... Per FCC

• FCC Emissions Designator ............... 11K0F1D (narrow)

• Frequency Stability ............................ Better than ±2.5ppm

 

Receiver

• RX sensitivity ( 0.1% BER)9600bps................... < -108dBm

4800bps................... < -114dBm

1200bps................... < -118dBm

• RF No-tune bandwidth ..................... complete band

• Adjacent Channel Selectivity............ -65dB narrow, -70dB wide

• Alternate Channel Selectivity........... -70dB

• Blocking and spurious rejection....... -80dB

• RX intermodulation rejection ........... -75dB

 

User Interface

• Serial Inter face Port

• USB Interface Option

• Standard Connector Type: DB-9

• IO Voltage Levels RS-232, RS-485, RS-422 (user selectable)

• RX and TX data Transparent Async

• Word length 7 or 8 bits

• Format N, O, or E

• Modem handshake signals RTS, CTS, CD

Unless noted, all specifications measured at 1200 baud. Specifications subject to change without notice.