Yaesu FT-991 Manual

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) :

Now open a VARA, WINMOR or ARDOP session in WL Express and select Radio

settings. Configure as shown (use the Enhanced COM Port as Radio Control

Port – in this case COM5):

In the menu of the FT-991 change the default settings oft he following items:

Menu #

Menu Function

Value

031

CAT RATE

38400

062

DATA MODE

OTHERS

064

OTHER DISP (SSB)

1500 Hz

065

OTHER SHIFT (SSB)

1500 Hz

066

DATA LCUT FREQ

100 Hz or OFF

068

DATA HCUT FREQ

3500 Hz or OFF

072

DATA PORT SELECT

USB

In ‘TNC Setup…’ of the WL Express session, do select ‘USB Audio CODEC’ in the

settings for the audio in/out devices.

IF you want to use your FT-991(A) for VARA FM (‘1200’) or packet radio, two

more items in the menu of the FT-991 have to be changed:

Menu #

Menu Function

Value

076

FM PKT PTT SELECT

RTS or DTR*)

077

FM PKT PORT SELECT

USB

*) This setting is used with UZ7HO soundmodem. It is not relevant for VARA

FM, which must be configured to use CAT.

To use the built-in soundcard for UHF/VHF, you must manually set the FT-991

to Mode ‘FM DATA’.

For VARA FM, the PTT setting is using CAT:

2019-08-20 / HB9AUR

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