FTdx101 Setup with DX4Win , WSJT-X, MMTTY, DxLog, MMVARI

All the following settings are what I use on my FTdx101 and associated software. I am using the Universal Serial Bus (USB) socket on the back of the FTdx101 - all settings on the radio remain at default unless indicated below.

FTdx101 Settings for FT8 and MMVARI using Upper Side Band (USB) Mode (i.e. not Data-U mode) .

For FT8 , remember to put the WITH setting to 4KHz and the Roofing Filter setting to at least 3KHz ; 12 KHz picks out even more signals but the RX may be susceptible to nearby strong signals).

Radio Setting -> Mode SSB -> SSB Mod Source = REAR (This needs to be changed when you go back to using the microphone on SSB).

Radio Setting -> Mode SSB -> Rear Select = USB

Radio Setting -> Mode SSB -> RPTT Select = DTR (this is for the PTT from the MMVARI ExtFSK extension)


FTdx101 Settings for FT8 and MMVARI using Data-U mode.

For FT8 , remember to put the WIDTH setting to 3KHz and the Roofing Filter setting to at least 3KHz (see note above about the 12KHz setting).

The firmware update of March 2020 corrected an issue with using DATA-U for data modes. I now prefer to use Data-U rather than USB.

Radio Setting -> Mode PSK/DATA- -> Rear Select = USB

Radio Setting -> Mode PSK/DATA- -> RPTT Select = DTR (this is for the PTT from the MMVARI ExtFSK extension)

FTdx101 Settings for RTTY using MMTTY ExtFSK

Radio Settings -> Mode RTTY -> RPTT Select = DTR (Also set MMTTY ExtFSK setting to PTT Output = DTR).

** To use the radio in RTTY mode I use the RTTY-L mode setting. (MMTTY settings further down).

FTdx101 Settings for CW

CW Setting -> Mode CW -> CW BkIn Type = FULL (personal choice for break-in)

CW Setting -> Mode CW -> PC Keying =DTR (allows CW keying via CAT control from Contest program)

CW Setting -> Keyer - >R KEYER TYPE = OFF (supports an external keyer)

FTdx101 Settings Personal Preference Settings

Operation Settings -> General - > ANT3 SELECT= R3-T1 (For an RX antenna)

Operation Settings -> General - > CAT RATE = 38400bps (must match any software connected to it)

Operation Settings -> General - > Quick Split Input = On

Operation Settings -> General - > Quick Split Freq = 2 KHz

Operation Settings -> TX General - > HF Max Power = 5 Watts

Display Setting - > Display -> My Call = G4IRN

Scope Menu - > Speed = Fast1

Scope Menu - > Peak = Lvl3

Scope Menu - > Marker = On

Scope Menu - > Direct Sampling SDR Color = 1; Narrow Band SDR = 14

Install the Virtual Serial ports on your PC/Laptop using the Yaesu provided driver software.

Two serial ports will be installed on your PC, similar to the screenshot below. In my case the port numbers are COM8 (standard port) and COM9 (enhanced port). Logging software and other software using CAT control uses the enhanced port.

DX4WIN Settings for FTdx101

FT8 with the FTdx101 using WSJT-X

First, you need to set up the CAT connections but be aware - the CAT cannot be shared with DX4WIN at the same time. So you have to do <Menu: Radio | Stop> in DX4Win before starting WSJT-X.

The screen shot below shows my Radio set up for WSJT-X:

You can see I have selected the FTdx3000 radio since (at least when I installed this) there is no FTdx101 file. The COM port I've used is the same 'enhanced' virtual serial port I used in DX4WIN.. Next, you need to set up the audio, the following FTdx101 settings are required:

For FT8 using USB (Upper Side Band) Mode:

Radio Setting -> Mode SSB -> SSB Mod Source = REAR

Radio Setting -> Mode SSB -> Rear Select = USB

The reason I use USB instead of DATA-U is because the receiver passband in relation to the carrier is correct in USB mode for FT8. The passband of received signal is incorrect for FT8 in DATA-U mode. (In USB the passband sits to the upper side of the 'carrier' or dial-frequency; in DATA-U the carrier (dial frequency) is in the middle of the passband so is about 1.5KHz out from what we want).

Audio I/O Channels

Then you need to set up the audio connections. In Window's Sound Manger I have renamed the audio connections for ease of use (you don't have to do this, it's just a nice-to-have). But either way you need to identify the two USB audio channels created by the driver. My Windows Sound Manager for 'Recording' then 'Playback' looks like this:

My USB audio channels are easily confused because I have two radios, you don't necessarily have to rename them but anyway, in WSJT you need to define which audio channels it should use to connect to the radio as follows:

I generally use MMTTY from my general logging program, DX4Win or from my contest logger, DxLog. MMTTY is set up the same for both. I use the FTdx101 in RTTY-L mode. The following screen shots are from MMTTY:

The following screen shots show the radio setup in DxLog. I do not change MMTTY setup between using DX4Win and DxLog.


Get native MMVARI working first, before trying it with DXLOg.

To set up MMVARI:

  • ExtFSK setup is the same as MMTTY above.
  • In Menu: Options | Setup MMVARI :
    • Change the SoundCard Input on the RX tab
    • On the TX tab set PTT to EXTFSK and tick the two boxes beneath it.
    • On the Misc tab set the soundcard input and output. Input channel should be Mono unless you have two instances of MMVARI, one one each receiver of the FTdx101 (sub and main).

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