Following on from the Yaesu FT-817 data mode set up guide, this page will take you through the steps required to setup and configure the FT-991 for data mode communication. Configuration of the FT-991 is simpler but there are differences which may not be clear in the manual supplied with the radio.
In this guide the following items are used:
Before connecting up, do ensure that your Signalink is properly configured, this will involve taking the unit apart. It should have come with clear instructions on how to do this, alternatively go to the Tigertronics web-site for help.
There are four socket head screws on the front of the unit to remove, this allows you access to the configuration socket. Configuration is no problem and should not be too difficult to do. New units are supplied with precut link wires which work just fine, alternatively there are pre-configured adapters available which will slot right in and eliminates the need for link wires.
Connect your Signalink, PC and radio as follows:
You'll need to install the driver and setup your Signalink sound card levels on your PC as described here: http://www.tigertronics.com/index.htm . It's fairly easy to do and should not cause any problems.
Switch on the FT-991 and check your settings as shown below: