Simultaneously the other half of the 12.5 kHz band width channel is used for error correction of the voice signal and other data. Voice FR mode (Voice Full Rate Mode) This mode uses the full 12.5 kHz bandwidth to transmit digital voice data. The increased amount of voice data permits high quality voice communication, providing superb sound quality. Data FR mode (High Speed Data Communication Mode) This high-speed data communication mode uses the full 12.5 kHz bandwidth for data communication.
Analog FM mode Analog FM is effective when weak signal strength causes audio drop out in the digital mode, and enables communication up to the borderline of the noise level. Digital and Analog FM Capable FTM-400XD performs perfectly well using both Analog FM and C4FM Digital including 1200/9600bps APRS (Automatic Packet Reporting System) Data communication capability. Enjoy the ease of operation that comes from the FTM-400 big 3.5-inch full-color touch-panel operation. Screen options include: Band Scope Screen Altitude Screen APRS® Screen Smart Navigation Screen Frequency Direct Input Screen Clock/Timer Screen Transmitter RF Power Output: 50 W/20 W/5W. Modulation Type: F1D, F2D, F3E; Variable Reactance Modulation, F7W: 4FSK (C4FM). Receive Range: 108 - 999.99 MHz Cellular Blocked (North American model) Transmitter Range: 144 - 146 MHz or 144 - 148 MHz, 430 - 440 MHz or 430 - 450 MHz (US version). FTM-400XD is cross-band capable when in Analog mode; a very important feature for emergency response events.