Talk:HamRadio: Difference between revisions

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Presenter: Ray Roberge WA1CYB
Presenter: Ray Roberge WA1CYB


Agenda:
* What is this Ground Station Test Transceiver ?  
* What is this Ground Station Test Transceiver ?  
* Architecture – Three Sections
* Architecture – Three Sections

Revision as of 23:44, 5 January 2021

Notes about the video meetings

Saturday 17 October 2020, 20:00 UTC

After some technical difficulties with Big Blue Button, we moved to Zoom and succeeded in doing the planned agenda:

  • Presentation of gr-RTTY-basics package
   https://github.com/duggabe/gr-RTTY-basics
https://github.com/duggabe/gr-webserver
  • Audio loopback demo
  • Live Over-the-Air demo

The time (20:00 UTC) proved to be too late for participants East of Greenwich, so an earlier one was scheduled for 7 November.

Saturday 7 November 16:00 UTC

The meeting followed the agenda above. There was a minor audio difficulty with the loopback, but I proceeded to present the Over-the-Air demo successfully.

View the presentation on https://www.youtube.com/watch?v=_HmbRk-UG8Q

Saturday 12 December 2020 16:00 UTC

Subject: Transmit / Receive switching and station control
Presenter: Gavin Jacobs VE7GSJ
Agenda:

  • Requirements for TX/RX switching
  • VE7GSJ Solution (hardware & GNURadio Companion)
  • Demo on 2m repeater

Files:

Thanks to Gavin for an excellent talk. It can be viewed at https://www.youtube.com/watch?v=rTp6vQk5MqE

16 January 2021 16:00 UTC

Subject: Using GRC to build radios: Make the flow graph work for you

Presenter: John Petrich W7FU

Agenda:

  • Getting started with GRC
  • Basic flow graph workspace organization
  • Flow graph details
  • Data flow problem solving
  • Practical odds and ends for real radios
  • Group discussion

Files:

Link to Zoom presentation:

   https://seti.zoom.us/j/81352632665

13 March 2021 16:00 UTC

Subject: Ground Station Test Transceiver

Presenter: Ray Roberge WA1CYB

Agenda:

  • What is this Ground Station Test Transceiver ?
  • Architecture – Three Sections
    • Receiver flowgraph
    • Transmitter flowgraph
    • Telemetry flowgraph
  • GUI displayed with a ADALM Pluto SDR
  • Over the Air results as received on a ETTUS B205mini on SDR-Console software
  • Discussion on finer points of Packet telemetry
  • Same flowgraph modified for UHD, Ettus B205mini and why you need to modify it
  • QT display , GRC 3.8.2 / 3.8.0 minor issues noted
  • Discussion

Questions and Suggestions for future meetings

Questions

  • The Ham Radio chat room on Matrix is available for follow-up and continuing discussion.
    • server: https://chat.gnuradio.org
    • or via the Homeserver in a matrix app: gnuradio.matrix.ungleich.cloud
    • room: #HamRadio:gnuradio.org
  • Questions about meetings also can be sent to "duggabe@dcsmail.net"

Suggested topics

  • Transmit hardware to operate below 50 MHz.
  • amateur radio satellite service
  • FreeDV
  • Contact ISS
  • EME - moon bounce communications
  • How to implement JS8, JS8-Call, and FT8 in GR
  • An in-depth walkthrough of GQRX
  • DMR or P25 in detail