Yaesu FT-991 Setup

Setup of YAESU FT-991(A) for Soundcard Modems
The YAESU FT-991 with its built-in soundcard allows easy operation of
soundcard based digital modes like FT8, VARA, VARA FM, Packet 1200,
WINMOR, ARDOP. Just a standard USB cable is needed between a PC and the
FT-991. Rig control (CAT), PTT control and Audio In/Out pass on this single USB
cable.
There is one draw-back with the FT-991: The soundcard cannot be used for
Packet Radio 9600 or for VARA FM in wideband (‘9600’) mode. In fact, when
setting ‘Packet Mode’ in the FT-991 to 9600, the soundcard does not modulate
the FM signal. Direct FM Modulation can only be done via the RTTY/DATA
connector.
To setup the FT-991(A) for WINLINK Express and VARA or WINMOR, the USB
Driver fort the FT-991 has to be installed on the PC first. This happens
automatically as soon as you connect the FT-991(A) with the USB cable to your
PC when it is online.
You can check if the 2 COM ports and the soundcard are correctly found and
installed by checking with the device manager. You will find an ‘Enhanced COM
Port’ and a ‘Standard COM Port’:
If the driver is not installed properly, right click on ‘Enhanced COM Port’, select
‘Update driver’ and have the OS search for it automatically in the Internet.
The soundcard appears as a ‘USB Audio CODEC’ (Microphone and Speaker) :

Yaesu FT-991 Specifications

General

Frequency Range Transmit	1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz
Antenna Impedance	50 Ohms
Antenna Connector	SO-239
Supply Voltage	13.8 V DC ±15%
Modes	SSB, CW, AM, FM, C4FM Digital
Display	3.5-inch color TFT LCD
Weight	4.3 kg