YSF

Being as we are operating on a multimode digital repeater, the C4FM is routed into the YSF system, which is different than the “true Wires-X system”. Yaesu has reserved the Wires-X rooms for Yaesu brand of repeater equipment only, so unfortunately, we are unable to connect to Wires-X unless we use a YSF room that is bridged with Wires-X. The YSF room list will have these bridged rooms listed in it.

The repeaters modem is always scanning for various modes. Many radios will send out a very quick command to connect, which can be missed while the modem is scanning. When attempting to bring up the YSF room list, please key the mic and announce your callsign first. This will get the repeaters attention and lock it on the C4FM mode you’re using. This will also let other people who are listening to know the repeater is about to be active, and what its connecting to. You will also want to treat this like a linked repeater system, keying the mic and giving it a count of three before speaking.

Please be sure to disconnect from the room when you are done.

A few of the most popular rooms are the AMERICALINK room or the UKLINK room. Also try the QuadNet array, which brings Fusion, Dstar, and DMR together in the same room. Just enter XLX307 in the search tab on your radio.

View a list of YSF rooms


What is System Fusion?

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 its 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.

Here’s a look at bandwidths used by different analog and digital modes, including FDMA:

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. Being as the repeater operates both analog and digital modes, we recommend setting your radio to “TX DN Fixed” mode. This will prevent the radio from switching to FM mode during the CW ID. This mode may show up as “DN” WITHOUT the line over it.

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.

Simple instructions on how to link to a room with the Yaesu FT-3D:

Key the mic and announce your callsign, then push the Wires-X button, you will notice your radio transmits a command to connect to the repeater, while the X symbol flashes on the upper right. Once the radio handshakes with the repeater, a new screen will come up on your radio. You should have a default room on the bottom flashing, indicating you’re not yet connected. You can then click on the Search & Direct button on your screen to search or scroll through a list of the available rooms. When you find a room you’d like to connect to, click on the room and it’ll connect. Now key your radio and make some new friends. Remember to key up and give it 2-3 seconds before you start talking.

Please be sure to disconnect from the room your using when done by pushing and holding the Band button, a prompt should come up indicating “Not Connected” and the room on the bottom should be flashing. From here you can push and hold the X button to exit the Wires-X mode.

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