(I find that DM780 responds faster using a direct PTT connection to the radio rather than sending PTT via HRD.) In this example, COM4 is for CAT, and COM5 is for PTT.Ģ) Click 'Add a Port', change the Port Protocol Type to PTT from the dropdown list, and check 'RTS' and 'DTR', both will turn BLUE in the VFO “A” Slice selection.

Please also make sure you have installed SmartCAT, and it is running.ġ) Open SmartSDR and connect to your radio.ģ) Set the mode to DIGU, Filter to 3K or 5K.ĥ) Your setup should look like the graphic belowġ) Click the DAX tab in the slice and set the channel to 1.Ģ) Make sure the DAX button is clicked in the P/CW tab on the right.ģ) Your setup should look like the graphic below.Ĥ) Open DAX Control Panel and click the '1' RX Streams Slice “A” button and verify it turns blue in color.ĥ) You should see the red volume bar move due to incoming audio from SmartSDR.ġ) Switch to SmartCAT and you will need to add another COM port for PTT trigger. I will demonstrate transmitting on 20M PSK31 using Slice A with a single Pan Adapter. This guide is to show how to configure SmartSDR and HRD v6.2 for use with DAX.

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