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Assorted ramblings from the developer


E's To Morocco

A very nice opening this morning to Morocco on Band II Stereo (88 - 108MHz).


Simon's World Map 1.0.8

 

Download here [link].

 

I wrote this program because I wanted to see:

  • Current Time (local, GMT)

  • Sunrise / Sunset

  • Greyline map

  • DX stations

There are commercial geo clock solutions such as the excellent Geochron, but as a programmer with spare HD monitors and computers I decided to write my own, that way I have exactly what I want.

Anyway, this weekend I finally found time to update Simon's World Map to version 1.0.8. Here's what is new:

  • Installs a 64-bit executable on 64-bit Windows, previously the 32-bit executable was used on 64-bit Windows.

  • Text colour in Clock, Sunrise / Sunset etc. is user-selectable.

  • Sunrise / sunset shown for entries in the station list.

  • Timezone markers updated

It doesn't need much CPU at all- anything running Windows 7 or higher is fine.


Airspy HF+ Discovery

Listening to France Musique, a station whose output is sorely missed in the UK.

Using the latest little stunner from Airspy.


Release: 3.0.9

Download here [Link].

Note: The main reason for this release is the fixes to transmit with the Pluto SDR.

What's new / changed in 3.0.9:

General

  • The 8.333 kHz tuning rate wasn’t working properly as it’s really 8.333 recurring.
  • The Analyser now correctly processes the Invert Spectrum option (swap IQ from the recording file).
  • The Ribbon Bar, Home. Radio, Bandwidth dropdown now shows the currently selected bandwidth when using radios where the actual bandwidth may differ slightly from the displayed bandwidth (Perseus at 95, 96 and 192kHz).
  • The bit smoothing option in RDS processing was not being set correctly.
  • USB Relay option now also part of the general Program Options.
  • Broadcast FM audio recordings now always created in stereo (two channel) mode – previously the recording was restarted every time the audio switched between mono and stereo.
  • RDS logfile now has a delay option in the Database selection pane, this is designed to be used in situations where there is considerable latency, for example when using a remote server.

Pluto

  • Transmit data is now controlled by a high-resolution timer with an accuracy < 1 millisecond.
  • Flow control has been added to compensate for the difference between the Pluto clock and the input device (microphone, VAC, …).
  • Added offset tuning, this ensures that the spur at the transmit LO is offset from the actual transmit frequency.

Airspy HF+ Discovery
Airspy HF+ Discovery

Screenshots taken with a prototype Airspy HF+ Discovery. This beauty is half the size of the Airpsy HF+ and it's as good if not better. Proper comparison data later.

If you suffer from strong signals then Discovery will not let you down.


Release: 3.0.8

Download here [Link].

What's new / changed in 3.0.8:

Broadcast FM

New features and changes for 88 - 108MHz FM broadcast reception and the RDS decoder.

RDS decoding has been improved by making PI code detection mor sensitive.

US Callsign logic now uses data from NRSC for callsign and location.

Spectrum window now a docking pane. Display the spectrum window by selecting Ribbon Bar, Receive, Broadcast FM. 

Logging of station from the RDS decoding has been added, this is the RDS Logfile option. To display the logfile click the Log button in the BFM Spectrum.

The logfile has all the options you need:

  • Enable / Disaply updates
  • The number of recent entries displayed
  • Detail level (brief, full)
  • Font size for ageing eyes
  • Delete entries
  • Edit an entry
  • Export as text
  • Options

Click ••• to display the options.

Airspy Options

The Airspy options have moved from the ribbon bar to the Receive DSP panel.

USB Relay

The USB relay terminology has been changed to avoid confusion.

  • ON = Turn ON a relay channel (Activate).
  • OFF = Turn OFF a relay channel (Deactivate).

Data (IQ) Recording

Playback now correctly detects ELAD recerdings and displays the format as ELAD. later the contents of the elad chunk in the WAV file will be supported.

Scheduled Recordings

  • Now can select single file in the definition, this uses WAV RF64.
  • Fixed display issues.
  • Tidied up the code.

Geostationary Beacon

  • Increased bandwidth for LNBs with very serious drift!
  • Fixed crash when bandwidth changed past the minimum / maximum supported.

Frequency Database

AOKI URL updated and new format supported.

Font size selection for ageing eyes.

Defauly field order changed, will be user-configurable in a future release.

Perseus

The sample rates 192kHz, 96kHz and 95khz are now calibrated.

Satellites

Tidying up and extending the Select Satellite option. Instead of just selecting a satellite, pressing Select in the Satellite ribbon bar now display the Select Satellite window which provides an overview of the entries in the Satellite List as well as selection of new satellites.

Footprint configuration is now consolidated into a property page.

Narrow FM

Uses the original version 3 de-emphasis and has better peak volume control.

Pluto

Problems with the transmit signal bursting reduced by redesigned inefficient code, see Pluto support page for more information.


Recent Posts

  • Release: 3.0.14 Posted 1 days ago
    Download here [Link]. What's new / changed in 3.0.14: General Closing threads (and the program) now much faster if the thread had not been started, also System Debugger diagnostics have been enabled to find any other issues when closing the program if the ‘Not Responding’ text was seen in the title bar. Fixed bug where a high-pass filter could be incorrectly applied to broadcast FM demodulation. RDS logfile now supports UTC as set in the … Options window. Geostationary beacon window now applies the current contrast when floating. Receive audio equaliser now correctly initialised when started from either: Audio dropdown, Ribbon bar. FM Squelch: big change on the FM squelch front: Now suing power suqelch instead of noise squelch, the squelch threshold/level values will be different, sorry about that. The original code was over nine years old and was a cheap and cheerful solution. In the kit the whole concept has changed, now it’s an advanced squelch based on signal power. Synchronous AM, ECSS Lock Range: ribbon bar entrry added. ...
  • Transparent S Meter Posted 2 weeks ago
    Version 3.0.13 introduced analog S meters and resulted in requests for transparency. One of the big features of SDR Console is the use of Direct2D graphics which is a lot more complicated than the GDI/GDI+ used in many other ham radio programs such as Ham Radio Deluxe. Working out transparency wasn't easy, finally a Microsoft example showed me how to do this. A day when you don't learn something is a day wasted. Here's an example of transparency. This will be part of 3.0.14.
  • Release: 3.0.13 Posted 3 weeks ago
    Download here [Link]. What's new / changed in 3.0.13: General Fixed frequency display problem in the RDS display. 100.05 was displayed as 100.5. Minor change to logic when closing the Matrix window, linked to a memory leak. Reduced background thread start-up time. Added Equaliser… option to the Playback device selection.   The Radio Selection windows displays Connect when a V3 Server is selected, otherwise Start. New option to replace 0 with O in the main frequency display.   Added Google Turbo and Inferno colour schemes.   Markers Memory definitions can now be shown as markers: new option in Markers dropdown and on the memories pane of the ribbon bar. Display of markers more efficient. Enhanced the marker display logic, allowed more room when markers overlap. Recordings Audio recordings made while playing an IQ recording are now timestamped with the time from the playback, not the current time. Added Status option to Playback pane in the ribbon bar. When selected the playback status is shown in the waterfall (the default). If not selected then playback status is not ...
  • Google Turbo Posted 3 weeks ago
    Turbo, An Improved Rainbow Colormap for Visualization  https://ai.googleblog.com/2019/08/turbo-improved-rainbow-colormap-for.html On Tuesday, August 20, 2019 Google posted an interesting colour scheme which they named 'Turbo'. Read more about this in the blog entry (link is above). Below is the colour map in action on the 25m shortwave broadcast band. As of 3.0.13 this is a standard colourmap[ in SDR Console. Also of interest is the use of a SNR (Signam to Noise) S Meter option.
  • S-Meters Posted 3 weeks ago
    After much pestering by users, I finally added an Analog S-meter to SDR Console. These will be available in 3.0.13, coming to a desktop near you soon. Background A few weeks previously a reasonable logic was implemented for measuring the noise floor. Purists will not be happy, but they rarely are, but it works for me. Take the output from the SDR radio, ignore 15% of the bandwidth at the high and low end of the output to avoid the ant-alias filtering, and we're left with a healthy 70% of the signal. Now sort the FFT bins by value, take the mean of the lowest 10% and that's the noise floor. Digital Starting with the standard digital metere: Analog Here are a few screenshots of the Analog S Meter. First a tradition meter in S units. Red = peak signal Yellow = current signal Grey = noise floor   Here's a dBm meter, same colours as above.   And here.s a Signal to Noise (SNR) meter.
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