User's Manual

RV-M50-EC Technical Manual

3. Operational Modes and Configuration

3.1 Channel Configuration and Virtual Channelization

About Virtual Channelization

With Virtual Channelization, the RV-M50-EC will operate in a proprietary, decentralized, 1-3 channel

frequency-agile manner. This unique feature allows networks of RV-M50-EC radios to operate with no

central network controller and no requirement that all radios are in range of each other. This enables

the reliability of multiple channels in the ISM band while allowing free-form network architectures as

required.

General Configuration

Under Virtual Channelization, a number of configuration options are selectable:

1. Channel frequencies

2. Channel bandwidth

3. Channel data rate

To configure any individual channel, issue ATHP <channel>, where <channel> ranges from 1-3 to select

the channel. ATH will list the configuration of all channels. Once a channel to configure is selected, the

commands below will modify the parameters of the channel.

FCC regulations require that the RV-M50-EC not allow certain modes of operation. If the radio is placed

in a non-compliant configuration, this will be indicated upon entering Command Mode or when issuing

the SHOW command. The SHOW or ATH commands will detail what action was taken to correct the

non-compliant configuration.

3.2 Channel Center Frequency

Channel frequency is set with ATFX <frequency>, where <frequency> is expressed in MHz, e.g. 915.5. In

North America, channel center frequency may be set between 902.3 - 927.8MHz for 125kHz channels

and between 902.7 - 927.5MHz for 500kHz channels.

To completely disable a channel, set ATFX 0. Note that disabling a channel will cause non-compliant

configurations if 125kHz channels are in use. All three channels must be enabled if 125kHz channels are

in use, and exactly two channels must be 125kHz.

Note also that a frequency separation of 600kHz is enforced for 500kHz channels and 200kHz for 125kHz

channels.

3.3 Channel Bandwidth and Transmit Power

Channel bandwidth is set with ATBW <bandwidth>, where <bandwidth> is set according to the table

below:

ATBW Setting

Channel Bandwidth

Transmit Power

125kHz

21dBm