Before you can use this option you must enable it. From the ribbon bar's View pane select More Options... and enable External Radio.
After restarting the console the display is added to the Receive DSP panel.
You must decide how the SDR receives signals, either using its own antenna or connected to the IF Output of the external radio.
This is the recommended option.
There are several ways to connect your SDR to an antenna:
When you use the IF Output from your radio the same frequency is used by the SDR irrespective of the frequency which the external radio is tuned. An example of a radio supporting IF Output is the FTDX-3000 with an output frequency of 9MHz.The software must make the necessary changes in frequency so that the external radio's frequency is displayed, not the IF output frequency.
This software uses OmniRig from http://www.dxatlas.com/omnirig/ for radio control. OmniRig must be installed before using the external radio display, see below for more information.
To configure Omni-Rig you must open the external radio options, to do this press the ?button in the external radio window.
April 23rd, 2016: the file to download and install is on http://www.dxatlas.com/Download.asp the file is OmniRig http://www.dxatlas.com/OmniRig/Files/OmniRig.zip , this contains radio definition (.ini) files. The very latest .ini files are in http://www.dxatlas.com/OmniRig/Files/RigIni.zip .
In the Logfile pane you can enable [X] Verbose logging and the [X] Debug option when helping diagnose problems. When debug is selected all entries written to the logfile are also sent to the current debugger, for example DebugView which is downloaded for free from https://technet.microsoft.com/en-us/sysinternals/debugview