# RF Settings

## Radio Capabilities

TX & RX Frequency Range, maximum Bandwidth, and Output Power Range are factory set.

## Settings

The radio button Transmitter Disabled is set at the factory to disable the radio transmitter until the Viper is minimally configured i.e. until the setup wizard procedure is completed with success.

The user enters the TX/RX frequency, power, bandwidth & bitrate The Viper can operate in simplex (same RX and TX frequency) or half duplex (RX and TX frequencies are different) mode. All ViPERs in a network must be set the same. Note: It is the user's responsibility to check his/her FCC license to determine the correct parameters and settings for the channel frequencies, power level, and bandwidth.

## Channel Selection

Mode - Manual : Use the channel selected in the "Settings" section.

Mode - External PIN : Use a channel based on the state of the RI pin of the COM port.

External PIN Low - Channel number to use when the state of the RI pin (of he COM port) is low.

External PIN High - Channel number to use when the state of the RI pin (of the COM port) is high.

External PIN State - The current state of the external pin (RI pin of the COM port).

When the mode is set to "External PIN", channel change occurs once at startup (to match the state of the PIN at that time) and on every state change of the external PIN.

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