RV-M7 Data Radio Modem Technical Manual

• General Information and Overview
• Specifications
• Electrical Inputs and Outputs
• Serial Port Commands
• Using the M7 Modem – Packet Mode
• Using the M7 Modem – Streaming Mode
• Installation
• FCC Licensing Information
• M7 Diagnostic Provisions
• Tuneup and Alignment
• Skyline Compatibility
• Antenna Information
• Appendix A.   Serial Port Hardware
• Troubleshooting
• Mechanical Information

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RV-M7 Data Radio Modem Technical Manual

SkyLine Compatibility

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 properly configured.  There are two versions of the Skyline, a wide-band version running at 9600 bps over the air, and a narrow-band version running at 5142bps over the air. 

2. Configuring M7 to Communicate with a SkyLine

To configure the M7 modem to talk to an old SkyLine modem, the user must configure the M7 with these commands:

ATR2  7   This command tells the M7 modem to operate with an over-the-air baud rate of 5124 bits per second.  This is the baud-rate of all narrow-band (12.5Khz spaced) SkyLine radio modems.    Wide-band SkyLine radios operated at 9600 baud over the air.  The command to set the M7 to 9600 baud over the air is ATR2 5.

ATR5  8   This command tells the M7 modem to send 8 bytes of pre-amble before every transmission.

MYID 1234The MYID of the M7 modem is set with the ATMY command or the MYID command.   The default MYID of the SkyLine was 1234. 

TOID FFFFThe TOID of the M7 modem is set with the ATDT command or the TOID command.  The default TOID of the SkyLine was FFFF (broadcast address).

A quick-configure command is included in the M7, to allow it to be easily switch to the M7 mode.  The command is “SKYLINE”.  When in the configuration mode, enterSKYLINE, and the modem will reconfigure itself as a narrow-band SkyLine modem, with TOID = FFFF, MYID=1234, 80 byte packets, 20mS serial port time out, channel 1 frequency, over-the-air baud rate 5142.