The FT-991A is all mode, all band MF/HF/VHF/UHF transceiver with C4FM (System Fusion) Digital capability. The FT-991A includes multi-mode operation on CW, AM, FM, SSB, and Digital Modes (Packet, PSK31, RTTY and C4FM), with 100 Watts of HF/50mhz Capability (50 Watts VHF/UHF).

The has a high-resolution full color 3.5“ TFT touch panel, incorporating a High Speed Spectrum and High Resolution real-time scope.

The FT-991 can be connected to a computer using a USB cable for CAT control and firmware updates, or the use of an integrated SCU-17 Interface Unit to support USB Audio In/Out, TX Control (PTT, Key, Shift).

The FT-991A has an in-built automatic antenna tuner.

Settings on the radio for HF are:

• mode: data-usb
• dial setting of 7.04575 (for GB7IOW)

On the F button:

• DT Gain 10 (DT Gain is unique to each setup, monitor ALC - increase until you see ALC kicking in, the back off)

On the Menu button:

• item 073 Data Out Level at 80-95

For legacy HF modes with a 1700 CF (Centre Frequency)

• Menu 064 and 065 set at 1700Hz. (F) Width 500hz

For the new beta NinoTNC modes with a 1500 CF

• Menu 064 and 065 set at 1500Hz. (F) Width 800hz (500Hz does work though)

And data mode set to others (menu 062)

The FT-991A’s USB interface can be used for packet radio with soundcard modem software, with the caveat that it cannot be used for 9600 baud. See https://sourceforge.net/p/fldigi/wiki/FT991A_9600/