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Using FDX to set up your TX Audio

Mike-VA3MW FlexRadio Employee, Community Manager admin
edited June 2020 in SmartSDR for Windows
How to use the FDX feature to set up your TX audio.

As well, how to use the RX Equalizer to   your advantage.

73 all es GL!


  • KD0RC
    KD0RC Broomfield, COMember ✭✭✭
    edited June 2020
    Thanks Mike, these videos really help us get the most from our Flex radios. NM9P also did a set of videos on this topic. He goes into some good detail, and I recommend them highly. 73, Len, KD0RC
  • w5ap
    w5ap Member ✭✭
    edited June 2020
    I never ever use SDR since I have a 6600m  other than save the profiles to a file
    That being said, 
    Would you please show how to adjust things in the 6600M screens as well as Smart SDR
    tnx es 73
  • Mike-VA3MW
    Mike-VA3MW FlexRadio Employee, Community Manager admin
    edited June 2020
    Let me see what I can do.  

    However, the process is exactly the same and the antenna selection Icons are very similar.


    • Set up 2 slices on the same frequency and same mode on a clear frequency -- I usually 10 meters
    • On one Slice, select that as TX and reduce your RF power to 1 or 2 watts into a dummy load or resonant antenna
    • On the other, receiving slice, set your volume and an RX antenna (blue) of XVTR or RXA or B -- what is key is that it is a different antenna than your TX Slice antenna
    • Turn on FDX 
    • Now, when you transmit, you will be able to hear yourself in the other receiver.
    This picture covers the critical settings.   In this case, we are transmitting on ANT1 (Red) on Slice A and receiving on Slice B on XVTA (Blue) and then turn FDX on.


  • Keith WA0BEU
    Keith WA0BEU Member ✭✭
    Thanks Mike, great info!

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