Digital Interface
Homemade 6 Pin-Din connector from the back up the radio for audio/data in and out to a TRRS connector on the PC headphone jack. CAT Control is conducted via USB B from the back up the radio to USB A on the PC. This uses the radios built in serial port for CAT / PTT Control. The driver for the Serial Port needs to be installed from here. (from the official Yaesu website) within the files section.
![From the Manual](https://digitalradio.wiki/wp-content/uploads/2023/12/ft-891-data-connection-diagram.png)
![ft-891 pinput](https://digitalradio.wiki/wp-content/uploads/2023/12/ft891-data-jack-1.png)
Radio Settings
Menu 05-06 CAT RATE : 9600
Menu 05-07 CAT TOT : 1000
Menu 05-08 CAT RTS : DISABLE
Menu 07-12 PC KEYING : Off
Menu 08-01 DATA MODE : OTHERS
Menu 08-03 OTHERS DISP : 1500Hz
Menu 08-04 OTHERS SHIFT : 1500Hz
Menu 08-05 DATA LCUT FREQ : OFF
Menu 08-07 DATA HCUT FREQ : OFF
Menu 08-09 DATA IN SELECT : REAR
Menu 08-10 DATA PTT SELECT : DAKY
Menu 08-11 DATA OUT LEVEL : 50
MENU 8-12 DAT BFO : USB
MENU 16-03 HF PWR : POWER FOR DIGI MODES
MENU 16-04 DATA DATA GAIN : 50
Make sure to set the "Width" Every band Change via the quick menu.
Software Settings
Yaesu FT-891 WSJT-X Settings
Rig Selected in WSJT-X Rig Control : FT-891
CAT Control Serial Port : Lower Port
Handshake : None
Force Control Lines (DTR) : N/A
Force Control Lines (RTS) : N/A
CAT Baud Rate : 9600
Data Bits : Eight
Stop Bits : One
PTT Method : CAT
Mode : Data/Pkt
Split Operation : None
Power Meter (20m) = -9.8db (If using The windows volume of -17.2db)
Power Meter (40m) = -9.8db (If using The windows volume of -17.2db)
![](https://digitalradio.wiki/wp-content/uploads/2023/12/image.png)
Yaesu FT-891 JS8Call Settings
(CAT CONTROL TAB)RIG: YAESU FT-891
(CAT CONTROL TAB)Com Port: LOWER
(CAT CONTROL TAB)Baud rate: 9600
(CAT CONTROL TAB)Data Bits: Eight
(CAT CONTROL TAB)Stop bits: One
(CAT CONTROL TAB)Handhsake: None
(RIG OPTIONS TAB)PTT Method: CAT
(RIG OPTIONS TAB)MODE : Data/Pkt
(RIG OPTIONS TAB)Split Operation: None
Power Meter (20m) = -9.8db (If using The windows volume of -17.2db)
Power Meter (40m) = -9.8db (If using The windows volume of -17.2db)
![Yaesu FT-891 JS8Call Settings](https://digitalradio.wiki/wp-content/uploads/2023/12/image-8.png)
![Yaesu FT-891 JS8Call Settings](https://digitalradio.wiki/wp-content/uploads/2023/12/image-7.png)
Volume Settings:
Windows Volume: -17.2db
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