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Whats the logic for using DIGU instead of USB for FT8. If you use usb with a 4K filter you can see t

N4AB
N4AB Member ✭✭
edited November 2019 in SmartSDR for Windows
Whats the logic for using DIGU instead of USB for FT8. If you use usb with a 4K filter you can see the whole band and jump any where to transmit.
73 Al, N4AB

Answers

  • George KF2T
    George KF2T Member ✭✭✭
    edited March 2019
    DIGU removes any transmit audio processing or shaping, providing a nice clean, flat response for your digital operation. In receive you can also use wider bandwidths - I use 5 kHz on HF.
  • Jamie WW3S
    Jamie WW3S Member ✭✭
    edited March 2019
    Can use wide bandwidth in digiu as well...
  • Neil D Friedman N3DF
    Neil D Friedman N3DF Member ✭✭✭✭
    edited October 2019
    I find the "wide graph" contained within the FT8 program to be much more useful in finding a free transmit frequency than attempting to use the SSDR screen.
  • VK7WH Winston
    VK7WH Winston Member ✭✭✭
    edited March 2019
    Another reason is that DIGIU turns off all processing
  • VK7WH Winston
    VK7WH Winston Member ✭✭✭
    edited March 2019
    Sorry, I didn’t see the earlier reply.
  • Ria
    Ria Member ✭✭✭
    edited November 2019
    I seem to remember someone (might have been steve) saying it also had lower latency.
  • Jay Nation
    Jay Nation Member ✭✭
    edited May 2019
  • Paul Leach
    Paul Leach Member ✭✭
    edited March 2019
  • Jay Nation
    Jay Nation Member ✭✭
    edited March 2019

    Al

    Also, the bandwidth filters are optimized for digital applications when using DIGU, they will either all use a 1500Hz center frequency or will be wide filters that start at 0 Hz and then go up to some useful upper cutoff point, like 3k or wider. Whereas USB filters are optimized for voice operations.

         SDRgadgets

    #FlexRadio IRC Chat

       73, Jay - NO5J

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