Category C4 FM Radio

C4FM stands for Continuous 4-level Frequency Modulation. (FM), and is the actual digital modulation of the radio signal used in System Fusion over VHF/UHF. Wires-X is the node linking/voip technology that allows nodes to link across the Internet.

For WIRES-X, an amateur node station connecting to the Internet is used as the access point and connects the wireless communication to the Internet. Users’ stations can communicate with other amateur stations all over the world using a node within the radio wave range.

WIRES-X supports the C4FM digital and the clear and crisp voice technology enables high sound quality. By repeating C4FM digital data as it is via the Internet, users can enjoy clear voice communications even if they are thousands of miles away each other.

Utilizing the digital communication, the WIRES-X operation is simple, easy and user friendly.
Varieties of the new functions as well as voice communications expands opportunities for enjoyment of ham station operation.

WIRES-X automatically connects to nodes and rooms via the Internet. No more need to verify connection IDs or transmit cumbersome DTMF connection codes.

Information about nodes and rooms is exchanged via C4FM Digital signaling. Thanks to automatic reconnection to the previous contact, all you need to do is press PTT and start talking.
Easily search for new nodes and rooms, and initiate communication promptly when you find an ID that captures your interest.

Yaesu FT-70D, finding and saving Wires X rooms into memory

What is C4 FM

The introduction of C4FM / FDMA technology is the beginning of a new digital communication system in Amateur Radio world. The most attractive advantage of digital communication is the ability to transfer large amounts of data. The 12.5 kHz channel spacing in using the C4FM FDMA digital modulation mode allows high-speed data communication with reliable voice communication and strong error correction performance.

C4FM FDMA offers a 9.6 kbps data transfer rate speed. It differs significantly from existing digital radio systems and expands the possibilities for interesting amateur radio activities in the future.

The C4FM / FDMA technology provides three digital modes and an analog mode (FM) V / D-mode voice and data communication in the same time frame. This mode allows voice data with GPS position data and the ID data to be sent in the same time frame. In addition, transmitting the voice data with strong error correction data, this mode that contributes to the stabilization of the digital communication. This mode is the basic mode of C4FM FDMA Digital HAM radio system.

Data FR mode uses the full data rate of capacity for the Transmission of data. This mode allows you to transfer large amounts of data, text messages, pictures and voice notes data at twice the speed as the V / D-mode. Voice-FR mode uses the full data rate of capacity for voice data. This mode allows a clear high quality voice data transmission.

Analog FM mode is the same as the current FM mode used by all
VHF / UHF amateur radio operators . A very useful Automatic Mode Select function identifies and selects These four modes automatically upon receipt of the respective signal.

Source Reference
http://www.on0dp.be/?page_id=266

System Fusion – Mostly referred to as Fusion is the newest digital radio mode. It was designed by Yaesu and is not an open standard. Yaesu is the only manufacturer of radios for this mode. Yaesu repeaters are true multi-mode capable and can replace an existing analog repeater while still providing digital capabilities.

I monitor 443.050 (locally), which connects me Worldwide to Americas Link.

I run a Yaesu FT70D handheld radio, I can hook it up to an outdoor antenna if needed. Works great!

Useful Links & Videos

Yaesu – http://www.yaesu.com/

Amateur Radio Hotspots
https://amateurradionotes.com/hotspots.htm

Yaesu System Fusion Introduction