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VRT and VITA 49 — a video and discussion about Radio Transport Protocol Objectives, Overview, and Ap

John WA7UAR Member ✭✭✭
edited February 2020 in New Ideas
Does Flex currently use Version 2 (or higher?) of VITA 49?

Here is a informative video and PDF, from 2016, that provide interesting insights into the continued development of the Vita Radio Transport (VRT) protocol and Vita 49 version 2 abilities.

I'm interested in hearing reactions to the video and document from Rodger Hosking, of Pentek, Inc. 



I thought this might be interesting for some in our Flex community.


  • K1VL
    K1VL Member ✭✭
    edited April 2019
    Thanks for sharing. Very interesting stuff.

    Carmine - W1EQX
  • Terry K8EET
    Terry K8EET Member ✭✭
    edited February 2020
    Most of it is over my head but it looks like the future of communications is still evolving. CW Forever.
  • John WA7UAR
    John WA7UAR Member ✭✭✭
    edited April 2019
    The reason I posted it is because our Flex ecosystem uses Vita 49 (.0?) and the video and PDF are now talking about .2. It was also interesting to hear him talking about how important it was for .2 to incorporate the .0 API. It had echoes to me of the recent Flex upgrades to its API. I’m imaging a long term project that allows Flex users anywhere to share receivers and transmitters among themselves globally. Want to work Europe the easy way? Use the Vita 49.2 protocols to find an available transmitter somewhere near the grid that you are looking for and give a call.
  • John WA7UAR
    John WA7UAR Member ✭✭✭
    edited February 2020
    Here is a short 2019 update about VITA 49.2, again from Roger Hosking. I’m hoping to hear more from interested Flex users who see the potential in upgrading our equipment to incorporate this expanded protocol.
  • John WA7UAR
    John WA7UAR Member ✭✭✭
    edited September 2020

    I came across this "Software-Defined Radio Handbook: 12th Edition" from August 2016 by Rodger Hosking (who I have mentioned in this thread previously.) The opening Preface is provided below. The handbook contains well written (and largely comprehensible) information that (I strongly suspect) forms the engineering underpinnings of the 6xxx Radio Servers from Flex. And since this is from a public source I wanted to share it with all of you.

    Quoting, "SDR (Software-Defined Radio) has revolutionized electronic systems for a variety of applications including communications, data acquisition and signal processing.

    This handbook shows how DDCs (Digital Downconverters) and DUCs (Digital Upconverters), the fundamental building blocks of SDR, can replace legacy analog receiver and transmitter designs while offering significant benefits in performance, density and cost.

    In order to fully appreciate the benefits of SDR, conventional analog receiver and transmitter systems will be compared to their digital counterparts, highlighting similarities and differences.

    The inner workings of the SDR will be explored with an in-depth description of the internal structure and the devices used. Finally, some actual board- and system-level implementations and available off-the-shelf SDR products and applications based on such products will be presented."

    And the link to the handbook is: https://cdn.everythingrf.com/live/software-defined-radio-v12.PDF

    Your continued comments and insights are welcomed here in this thread. And... I'm tagging @Tim - W4TME ;-)

  • Lasse SM5GLC
    Lasse SM5GLC Member ✭✭✭

    Looking at an old Youtube video: https://www.youtube.com/watch?v=LuWaStl0GgI

    N5AC presents VITA49.0-2009 when talking about the API. Not sure if this is what been implemented though.

  • John WA7UAR
    John WA7UAR Member ✭✭✭

    @Lasse SM5GLC VITA 49.0 is what is implemented in the Flex architecture. I'm interested in seeing what it would take to get everyone to VITA 49.2.

    Thanks for your Youtube video reference!

  • John WA7UAR
    John WA7UAR Member ✭✭✭

    At the recent March 2021 QSO Today Virtual Ham Expo, Steve Hicks, N5AC and VP of Engineering at Flex, gave an excellent presentation about "SDR as a Platform" and gives additional insights into VITA 49 as part of the Flex ecosystem. This YouTube link starts at at 12:35: https://www.youtube.com/watch?v=BMc4hoVcJE8&t=755s

  • KD0RC
    KD0RC Broomfield, COMember, Super Elmer Moderator

    Thanks for the link John. That was a really informative video. I have almost no knowledge of VITA 49, but with the IW7DMH Arduino library (which parses VITA 49), I am able to control a Flex radio pretty easily.

  • John WA7UAR
    John WA7UAR Member ✭✭✭

    Fantastic insight and information @KD0RC !

    Here is a link to the Arduino library you referenced that parses VITA 49:


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