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Assorted ramblings from the developer


CW Decoder
CW Decoder

I've always wanted to write a CW decoder from the ground up, a decoder which is as good as the human ear and possibly better. A week ago I started this project as an add-on for V3, the deocder is working but there's a long way to go. It'll probably be available by the end of August, for now here's a taster decoding the NQY (Newquay airport) beacon on 347kHz. Note: this is a development window with extra data to help get synchronised and extract real signals from the noise.

Who knows, maybe add some AI as well?

 


Release: 3.0.1

Additions / Fixes

  • High / Low range in Spectrum now has sanity checks
  • Updated to latest Airspy HF+ code (iqimbalancer)
  • Serial port CAT control supports concatenated commands
  • Bitrate display in Server Manager / Connections now stable
  • RDS data window positioned better, size now user-selectable (ribbon bar, Receive, Mode, Broadcast FM, RDS / Audio, Max size)
  • Regular keepalive Acks now sent when using SDR-IQ, SDR-14, ANAN
  • ICOM R8600 support
  • If there is an error during a data recording (usually can’t write to disk fast enough) then the error is shown in the recording status window on the main UI
  • Added visual gain for ELAD S1/S2
  • Deferred auto-start of previously selected radio, applied extra logic in the case where the radio may no longer be available
  • Narrow FM - high-pass filter now selectable (Ribbon Bar, Receive, Mode, Narrow FM)

ICOM R8600
ICOM R8600

After a few days of programming (interspersed with cold beers) . Available for testing tomorrow with any luck.


3.0 Released
3.0 Released

Version 3.0 was started on February 28th, 2015 at 07:43. Many hours of coding later and I'm able to release 3.0. Check this blog for the status of 3.01, new features, fixes etc.

Download here.

73, Simon


FM Band II E's & Tropo
FM Band II E's & Tropo

The band is filled with lots of French, Spanish and Moroccan stations, a mix of Tropo and Sporadic-E. Using Airspy R2 and 8-element yagi from Innov Antennas.


Direct Frequency Input

You now enter a new receive frequency by simply entering 0 ... 9 or . (period). As soon as you start typing the Frequency window is displayed.

  • C toggles the Centre option,
  • K toggles between kilohertz and megahertz.
  • For more options click the ellipses.


Signal History Export

The signal history is selected from the View, Spectrum pane in the ribbon bar, the data is exported by selecting the ellipses button.

In the Export window you now select:

  • Field delimiter and correcsponding file format of comma (CSV) or tab (TSV),
  • Decimal separator of . or the separator for your locale, for example a ,.


Broadcast FM

At the request of Broadcast FM users, I've added the most common options to the ribbon bar. The image below shows what's now.

  • Stereo - enables stereo, when signals are weak mono can be preferable,
  • Partial - enable display of text even when only partially decoded, should be used in very weak signal situations,
  • PI Code - show the Program Information code,
  • Show - show the RDS text in an overlay on the waterfall.

1 kW SDR
1 kW SDR

Next week a beta Gemini 1K will arrive at the G4ELI location. With just 10W from an ANAN 10E it'll generate 1 kilowatt without breaking into a sweat.

http://www.linamp.co.uk/gemini_HF.html


V3 Beta
V3 Beta

After three years the first beta is available, download from http://www.sdr-radio.com/Software/Downloads.


Recent Posts

  • CW Decoder Posted 3 days ago
    I've always wanted to write a CW decoder from the ground up, a decoder which is as good as the human ear and possibly better. A week ago I started this project as an add-on for V3, the deocder is working but there's a long way to go. It'll probably be available by the end of August, for now here's a taster decoding the NQY (Newquay airport) beacon on 347kHz. Note: this is a development window with extra data to help get synchronised and extract real signals from the noise. Who knows, maybe add some AI as well?  
  • Release: 3.0.1 Posted last week
    Additions / Fixes High / Low range in Spectrum now has sanity checks Updated to latest Airspy HF+ code (iqimbalancer) Serial port CAT control supports concatenated commands Bitrate display in Server Manager / Connections now stable RDS data window positioned better, size now user-selectable (ribbon bar, Receive, Mode, Broadcast FM, RDS / Audio, Max size) Regular keepalive Acks now sent when using SDR-IQ, SDR-14, ANAN ICOM R8600 support If there is an error during a data recording (usually can’t write to disk fast enough) then the error is shown in the recording status window on the main UI Added visual gain for ELAD S1/S2 Deferred auto-start of previously selected radio, applied extra logic in the case where the radio may no longer be available Narrow FM - high-pass filter now selectable (Ribbon Bar, Receive, Mode, Narrow FM)
  • ICOM R8600 Posted 3 weeks ago
    After a few days of programming (interspersed with cold beers) . Available for testing tomorrow with any luck.
  • 3.0 Released Posted 3 weeks ago
    Version 3.0 was started on February 28th, 2015 at 07:43. Many hours of coding later and I'm able to release 3.0. Check this blog for the status of 3.01, new features, fixes etc. Download here. 73, Simon
  • FM Band II E's & Tropo Posted last month
    The band is filled with lots of French, Spanish and Moroccan stations, a mix of Tropo and Sporadic-E. Using Airspy R2 and 8-element yagi from Innov Antennas.
Read More »