System
Fusion is a digital communications mode for voice and data, including
pictures. It utilizes a customized, yet open, C4FM FDMA standard.
C4FM stands for Continuous Four Level Frequency Modulation,
which is a special type of 4FSK, which is used in conjunction with FDMA -
Frequency Division Multiple Access. FDMA is the same mode that is used in P25
Phase 1 by public service groups, including Emergency Responders, but it’s not
compatible.
What sets this new technology apart from other digital voice
technologies, such as D-STAR, DMR, P25, and NXDN, is its backwards
compatibility with analog FM.
Automatic Mode Select
Every Fusion radio and repeater is aware of the current QSO
and it's mode, using a feature called Automatic Mode Select. This function
instantly recognizes whether the received signal is C4FM digital or
conventional FM. The communication mode automatically switches to match the
received mode. Even if a digital signal is being used, you can switch to FM
communication if radio signals are received from an FM station. This function
enables stress-free operation by removing the need to manually switch the
communication method each time.
AMS function breaks down into the following operating modes that are fully
selectable by the radio user:
AUTO: The both RX/ TX mode is
automatically selected from one of the four operating modes (DN, VW, DW
and FM) to match the characteristics of the received signal. This is the
current AMS operation.
TX MANUAL: The both RX/ TX mode is
automatically selected from four operating modes to match the
characteristics of the received signal. And if desired to change the TX
mode, by pressing the Microphone PTT switch momentarily, the TX mode
switch between DN and FM modes.
TX FM FIXED: The RX mode is automatically
selected from one of the four operating modes, but the TX mode is fixed to
FM.
TX DN FIXED: The RX mode is automatically
selected from one of the four operating modes, but the TX mode is fixed to
the ‘DN’ (Digital Voice Narrow) mode.
TX VW FIXED: The RX mode is automatically
selected from one of the four operating modes, but the TX mode is fixed to
the ‘VW’ (Digital Voice Wide) mode.
System
Fusion uses a similar DVSI AMBE DSP chip as used in DMR & P25, but newer
than what's used in D-STAR.
System Fusion Modes
V/D (Digital Narrow)– Voice+Digital or “V/D” mode
Voice FR (VW) Mode – Utilizes all available bandwidth for high-fidelity voice
operation, providing the most crystal clear of voice communications.
Highspeed Data
Transfer data such as images or text messages at full rate
with speeds up to 9600 Bits-per-second
Analog FM Mode
Maintains backwards compatibility with existing Analog FM
Equipment, allowing a wide range of users to experiment with System Fusion
Digital.
Capabilities such as Automatic Mode Select (AMS) on the DR-1X
Repeater allow an even wider range of users to communicate, by running the
repeater in “Fixed FM” mode on Transmit, and “Automatic Mode Select” on receive
the repeater will automatically detect the incoming signal and convert it to an
Analog FM Transmission. This mode allows digital users to communicate with
existing Analog FM users without the need to switch their radios into FM Mode,
allowing crystal clear Digital reception into the repeater that is converted
into a conventional FM Signal.
System Fusion Repeaters in Maine, New Hampshire, & Massachusetts
Lewiston, Applesass Hill Sidney UFB New England Fort Kent
Morrill UFB New England
Athens UFB New England
Falmouth UFB New England
Dedham UFB New England
Cooper UFB New England
Dixmont UFB New England
Phippsburg
Poland Spring, White Oak Hill
Brunswick, Woodward Cove
Plymouth UFB New England
Windham
North Conway, Mt. Cranmore
Sanbornton, Steele Hill Resorts
Pembroke
Goffstown
Farmington Wolf Pack Network Dublin, Snow Hill Kensington, Waymouth Hill
Gilford, Gunstock Mountain
North Conway Great Barrington, Ski Butternut Methuen Falmouth Hospital Weston Adams, Mt. Greylock Pittsfield Stoneham Wolf Pack Network
Whitman Weymouth, South Shore Hosp. Great Barrington, MMRHS Gloucester Bridgewater Pepperell Marlborough Greenfield Methuen Wolf Pack Network
Walpole Hopkinton
State
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FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion WIRES-X FM Fusion FM Fusion FM Fusion
FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion FM D-STAR Fusion FM Fusion NXDN Fusion FM Fusion FM Fusion FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion FM Fusion WIRES-X FM Fusion FM Fusion
