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DCC Day Two - Codec 2:

Bruce Perens, K6BP - Codec2: An Open Future for Digital Voice

Bruce outlines his plans for an open non-propriatery voice codec for amateur radio applications.

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DCC Day Two - SDR Cube

George Heron N2APB and Juha Niinikoski, OH2NLT - SDR Cube: A portable SOftware Defined Radio Utilizing An Embedded DSP Engine for Quadrature Sampling Transceivers

George and Juha have designed a complete SDR transceiver in a 4" x 4" cube.  It contains a Softrock RxTx v6.3 and an embedded DSP controller a graphic LCD display and all controls.

It also allows connecting the NUE-PSK Digital Modem for various digital data modes.

They expect to cell kits and assembled versions sometime in the next couple of months.

More info at: https://www.sdr-cube.com

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DCC Day Two - Teaching D-RATS about AX.25 and WInlink

Dan Smith, KK7DS - Teaching D-RATS about AX.25 and WInlink

Dan gave a very nice talk with some background on D-RATS and whyAX.25 support might be desirable.

For about a year D-RATS has supported D-RATS frames stuffed into a kiss frame.  This has allowed the use of kiss mode tnc's but without AX.25 you can't digipeat or make use of any ax.25 infrastructure.

The current design does not implement (or ever will) AX.25 layer three it simply wraps it's frames in a AX.25 UI frame.

More info at: https://d-rats.danplanet.com/

 

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DCC Day Two - Digital ATV using DVB-S

Ken Konechy, W6HHC and Robbie Robinson, KB6CJZ - Testing a Digital-ATV Station using DVB-S

A very nice discussion by Ken about creating an ATV station using the DVB Satellite broadcast standard.

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DCC Day Two - Bidirectional Low Frequency Transverter

Alex Schwarz, VE7DXW - Bidirectional Low Frequency Transverter (Bi-LIF) Computer Interface for Demodulation and Modulation of Radio SIgnals

Alex outlined a Software/Hardware system that allows you to use current or older HF gear with an SDR based replacement for the original mod/demod section of the rig.

Essentially what he's doing is tapping into the receiver IF and using SDR techniques to provide demodulation on receive, and also tapping into the transmitter section to modulate.   Couple this with PC software to control the radio and do the mod/demod and you have some of the benefits of SDR applied to older radios.

Boards and kits available.

More info at: http://kenai.com

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DCC Day Two - WINMOR Phase 2

Rick Muething, KN6KB/AAA9WK - WINMOR Phase 2: Demonstration to Deployment

WINMOR (WINlink Message Over Radio) is a replacement for the proprietary Pactor protocols in Winlink networks.  It uses standard PC's and soundcards to impliment an ARQ protocl that approaches Pactor 2 and 3 in performance yet is freely available and can be implimented anywhere on any OS.

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DCC Day Two - RMS Express

Victor Poor, W5SMN/AA9WL - RMS Express - A Multimode Winlink 2000 User Client Progrom

Victor gave a talk on the Windows based RMS Express client program for the new WINMOR protocol.

While I'm not personally all that interested in Winlink, the discussion of why RMS Express was designed was interesting. 

RMS Express is designed to be easy to use, quick and foolproof to install (as Victor said "at least fool resistant")

Interesting features:

  • Automatic HF channel list updates - list current HF channels that are in use worldwide
  • HF Propagation prediction sorts the list by most probable frequency to make a given connection
  • Control for most common HF rigs in current use
  • Not a peer-to-peer or keyboard-to-keyboard program with the exception of it's use with the WINMOR protocol
  • The GUI interface looks a lot like a typical email client. ( A beef of mine about all these various Amateur Radio programs, why not make these systems use your real email program?)

 

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Last two talks of the day

I skipped a couple of the early afternoon talks but was back for the last two of the day.

My netbook battery was exhausted so these are from memory and the DCC printed proceedings.

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Robotic Radio and CW Robot

Rob Frohne, KL7NA on a building block for Robotic radio

Nice dig by Rob on the age profile of his audience :-)

Using Robotics (Lego robots) to reach kids and encourage Ham Radio.

Robotic Radio - Doing things automatically that we as operators used to do.

  • SteppIR's antennas for example
  • Automatic antenna tuners
  • Rotators
  • pskreporter.info
  • WebSDR - SDR receivers online,  websdr.org

Rob gave a little intro to Open Source software for radio,  FLDIGI, DTTSP, SDR-Shell, etc.

 

CW Robot is an opensource version of CWSkimmer written by Rob's Students and is available at:

http://people.wallawalla.edu/~Rob.Frohne/CW-Robot/cw-robot.tar.gz

Check out http://www.websdr.org and follow the link to K7UEB, Walla Walla university to play with Rob's setup.

 

 

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D-Star for the Technically Curious

Our very own John Hays on D-Star building blocks