C4fm frequencies. C4FM world map. 6 kbps data transfer rate speed. I am looking for simplex frequencies, excluding the National Simplex for 2m and 70 cm, to use for digital simplex with Yaesu C4FM/System Fusion, APRS. The extra bits are used in C4FM-Fusion in a different way. You can click on the c4fm repeater on the map to get information. The 12. If you hear a lot of racket, then 10 is probably open. Jul 9, 2024 · C4FM FDMA offers a 9. This is becoming something of a national standard. facebook. S band plan ARRL 144MHz band 2m band146. This is not a narrow band compliant mode and only allowed above 29 mhz. General class license (or higher) is required. 500 MHz and higher and give it a try. Welcome to our C4FM resources page. What is System Fusion/C4FM/Wires-X ? 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. Yaesu FTM-300DR C4FM/FM Dual-Band Digital Mobile Transceivers. Figure 1 depicts the C4FM eye diagram after the filtering stage. Each frequency deviation corresponds to a unique symbol, enabling the transmission of two bits of data per symbol. In C4FM modulation, the transition between any two symbols will involve a change in the frequency, and hence the resulting signal envelope will have a constant amplitude. Oct 1, 2022 · It seems like a lot of folks with digital voice capable radios (Yaesu Fusion [C4FM], D-Star, DMR, NXDN, P25, etc) wonder what simplex frequency to use. Once you’ve established contact, move to a standard FM simplex channel, or use the all modes section of the band. 300 is popular for simplex. According to Wikipedia, British hams use 29. These features allow the operator to transmit High quality digital voice simultaneously along with Digital Data, and a High Rate (Data FR Mode) dedicated Digital Data mode that provides a method of transmitting Images, Text message and Telemetry Data at a high rate Feb 3, 2021 · So essentially when someone such as myself is on my ft70, and is near someone else on fusion, I would simply transmit to an agreed upon frequency? And if it were an "agreed upon" calling frequency, then while traveling, anyone on fusion would monitor that calling frequency for traffic. The 144. May 18, 2019 · A guide to DMR and C4FM simplex frequencies, offering details on configurations, channel options, and tips for seamless amateur radio communication. 6375 – 144. It can range from mildly aggravating to completely intolerable for some users to hear the buzzing digital wasp's nest on a frequency "thought" to be analog simplex. Nov 18, 2022 · The Yaesu FT-991(A) is the only radio that is capable of Tx and Rx on 10 meters as well as operating in Group Mode (GM). 600 and sometimes you find someone on 29. 0 – P25 C4FM Frequency Deviation States Information bits Frequency deviation 00 +600 Hz 01 +1800 Hz 10 -600 Hz 11 -1800 Hz Is there a commonly used simplex frequency for digital use, when I don’t want to use the repeater or it’s being used already? The frequency of 147. Any info would be great, I didnt find much doing a search. 415 MHz Yaesu incorporated a suite of features within the System Fusion product line that are designed specifically for Amateur Radio Use. “Digi-RATS” is a name given to the Desert RATS members who regularly participate in nets and other C4FM / Wires-X activities. 400 MHz 146. 500 for simplex and in Japan, 29. I know that D-Star has a couple simplex freq so I thought there might be something for Fusion. Most Yaesu C4FM radios are capable of five different modes of operation: C4FM repeaters updated every hour 14 Jun 2025 12:06:57 GMT Feb 2, 2018 · Proceed carefully before you light up VHF / UHF simplex frequencies with digital voice modes (e. Mar 30, 2021 · This is on the C4FM Call Freq. Our little Yause FT-991 can be a fun radio to try out. 6 kbps for high-fidelity voice. 525 MHz as the “watering hole” for System Fusion simplex activity has been popular in the east, since the technology became widely available. 420) and using C4FM, should you really be using a frequency in the digital portion of the band? Jun 9, 2025 · Modulations [] Phase I FDMA Frequency Division Multiple Access []. The World Wide FM Simplex frequency is 29. When going through the hands on part, I try to go slow enough for Chart 1. 7875 range is recommended. 250. The C4FM simplex calling frequency is 29. com/groups/249799. 195 MHz. On 4/10/2020 5:38 AM, AC2FV wrote: During our club meeting last night, the question was raised that if you were on a voice/ssb frequency (in this case 28. What is C4FM and how does it compare to D-Star? As transmitted on-air, a C4FM signal - like Icom's D-Star signal - is simply FM: More specifically, it uses Frequency-Shift Keying (FSK) to convey data. Sep 29, 2024 · This amateur radio project by Yaesu utilizing the C4FM protocol. Full list and link to all repeater frequency pairs in description! 2 meter simplex frequencies U. Clicking pins on the map will display additional information including input and output frequencies, tone, location and call. May 4, 2022 · With the 10 meter band opening more often, owners of the Yaesu FT-991 or FT-991A can operate C4FM digital voice on 10 meters. 400 to 29. Jul 12, 2015 · I am wondering if there has been any talk or implementation of a national C4FM calling frequency. 5 kHz channel into sub-channels. Map c4fm of nodes and rooms. How to use it. D-Star, DMR, C4FM, P25). 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. So ant one General or higher can move up to the FM portion 29. 250MHz. 500. g. 5 kHz channel spacing in using the C4FM digital modulation mode allows high-speed data A guide to setting up C4FM beaconing on the Yaesu FT991, and a demonstration of a contact on 29. Audio Codec: AMBE+2 vocoder at 9. To use the GM mode, simply set your frequency (29. Phase 1 can use either C4FM Continuous 4-Level Frequency Modulation (continuous 4-level FM Frequency Modulation) or CQPSK Continuous Quadrature Phase-Shift Keying (Compatible Quadrature Phase-Shift Keying, also known as LSM, or Linear Simulcast Jan 17, 2015 · What is C4FM? [ Please see the slide deck's note's for additional details ] Stands for Continuous Four Level Frequency Modulation – A special type of 4FSK Used in conjunction with FDMA (Frequency Division Multiple Access) This is the same mode used in P25 Phase1 which is used by Emergency Responders but isn't compatible Use this for CQ calls using C4FM or other digital modes. It uses the same AMBE+ Codec as DMR, but needs only 3600 bits/s. C4FM is a digital modulation mode that encodes information using four discrete frequency deviations. C4FM map of repeaters in the world. When the band is open, you may see or hear C4FM traffic on this frequency. 250 MHz. C4FM is the second most popular digital mode in Australia and new repeaters are coming on line regularly. Australian C4FM ham radio repeater map. Wires-X is the node linking/voip technology that allows nodes to link across the Internet. Feb 28, 2024 · Fusion C4FM seems to have found a place on 29. Here, you’ll find information about our C4FM repeater and how to start using C4FM (Constant Envelope 4-Level Frequency Modulation) and WIRES-X equipment. Phase 1 uses a 9600bps data rate to transfer IMBE-encoded voice or packet data. I have an FTM-400XDR mobile rig. Facebook group: https://www. Jul 6, 2020 · There are several groups on Facebook that promote the use of C4FM on 10 meters. C4FM-Fusion is a system developed by YAESU. 250), select your antenna, and punch the GM button in the F/M-List menu. 250 by use of the Yaesu GM function in most Yaesu C4FM radios including the 991. The symbol rate in C4FM modulation is 4800 symbols/sec, which gives a data rate of about 9600 bps. Radio Features:- 50 W Stable High-Power Output 144 - 148 MHz, 430 - 450 MHz- Dual Band Operation (V+V, U+U, V+U, U+V) and Simultaneous C4FM monitoring- 2-inch High-Resolution QVGA Full-Color TFT Display and Detachable Front Panel Controller- Memory Channel Band Auto Grouping Function (AIR, VHF, UHF, GEN)- High-Speed & High Jul 9, 2019 · Did you know that you can do C4FM “System Fusion” on HF? Well at least on the FM portion of the 10 meter band you can. Click on the icon on the C4FM map to get information about the node, room or repeater. It differs significantly from existing digital radio systems and expands the possibilities for interesting amateur radio activities in the future. Key Features: Simple “analog-like” operation: Users can tune frequencies directly without complex programming. Specifically, they promote a calling frequency of 29. We just need to get out of this solar minimum. What is it? How to set it up in your radio. It is based on 4FSK (like DMR), and also transmits 4 frequencies with a total data rate of 9600 bits/s. One way to check 10 meter band conditions is to tune AM down to the CB frequencies near 27. Feb 18, 2025 · C4FM (Continuous 4-Level Frequency Modulation) Modulation: FDMA (Frequency Division Multiple Access) splits a 12. lgem gctoypm pjfg lhr ejj swetdz jdijfj ijs vaai gjcsdefs