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Assorted ramblings from the developer


Release: 3.0.2

Performance

Some of the early V3 code was not as efficient as it should have been - the Windows message pump was working too hard. Messages have been replaced with callacks and high-precision timers, as a result performance and CPU load on lower-powered computers such as the Core2Duo and mobile CPUs has improved, sometimes quite dramatically.

Additions / Fixes

  • Added Favourite Definition Groups. You can now have up to 5 optional sets of Favourite definitions as well as the Default. More below…
  • Added single-tuner RSPduo support.
  • Changing spectrum colours now updates the RX DSP pane if the pane is floating.
  • Latest HF+ library now in use.
  • Issues clicking on main window splitter causing areas of the display to go white (not be painted) resolved.
  • Fixed issues setting recording options via the Program Options.
  • Reduced Airspy / Airspy HF+ latency.
  • Satellite custom name definitions can now be undone.

Outstanding Bugs

  • Restarting doesn’t restore the filter width, this always reverts to the default for the last used mode.

 

Favourite Definition Groups

Select from the Defns panel in the ribbon bar, Defns is only shown if you have enabled one or more definitions groups.

In the Organiser select the Definitions, click … to define groups (top of window, see below).

 




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Recent Posts

  • Lime's Digital Filter Posted last week
    So, revisiting the Lime support and have implemented the digital low-pass filter (LPF) built into the chip. In the screenshot below the sample rate is 40 MS/s (40 MHz bandwidth) with the digital filter set to 55% (22MHz). You now see this filter in action.
  • Release: 3.0.5 Posted 2 weeks ago
    Download here [Link]. Note: 3.0.5 fixes / enhances the support for PlutoSDR. What's new / changed in 3.0.5: General Transmit support enabled for frequencies above 4GHz. Receive support error fixed, now works above 4.2GHz. Transmit NFM now has configurable deviation and maximum frequency: Added Synchronous AM demodulation DC correction. If a radio was Stopped / Started with Tone enabled then subsequent transmission was unreliable – either no output or very low output. This problem resolved by resetting the Tone and Tune options in the transmit window when stopping a radio. Cosmetic: program size now optionally shown in status bar (bottom right), this option is enabled in Program Options (bottom right): Cosmetic: receive DSP Mode selection window […] improved: Cosmetic: Select Identity window optionally shown when program starts now has the title correctly updated: Pluto More sanity checks when connecting to a device. Pluto can now be accessed using the IP address, the default is ip:192.168.2.1 URI (format), the Pluto IP address can be changed as required. Recoded the Pluto transmit thread – now more reliable. Transmit data is correctly buffered ...
  • Satellite Footprints Posted 2 weeks ago
    As part of the fixes / enhancements for 3.0.5 I've added the optional display of footprint for additional satellites, lots of display options now available. Coming soon!
  • Pluto Two-Tone @ 145MHz Posted 2 weeks ago
    145.8 MHz Here's a screenshot of a 'hacked' Pluto transmitting a two-tone signal as received by an Airspy HF+ (probably the best SDR you can buy for reception at 145MHz). As you see, the transmission is nice and clean. Due to the design of the AD9364/AD9363, if both, the TX and RX Local Oscillators (LO) are set to the same frequency or very close to each other  the TX LO may leak into the RX path. Monitoring your own signal with Pluto in full duplex mode is not recommended; use a second receiver instead. If you do monitor with Pluto in full duplex then turn the RX Gain to 0dB to avoid overloading the receiver stages.   Here's the two-tone setting.
  • Release: 3.0.4 Posted 4 months ago
    Download here [Link]. What's new / changed in 3.0.4: SDRs ADALM-PLUTO transmit and receive support added. Airspy HF+ support library upgraded to latest release, CPU usage now much lower. Airspy HF+ supports pre-production units properly, also units with old / original firmware. ANAN code given a lot of attention, working much better. bladeRF2 now checks that the frequency is within the supported range. Lime transmit support added. General New Added Pseudo Stereo (ribbon bar, Receive, Mode..., Pseudo Stereo). Downconverter supports frequencies up to 999.9 GHz. Frequency database supports a Custom CSV layout. Frequency display supports frequencies up to 999.9 GHz. If there are no receivers a warning is displayed. Signal History - added Slower and Very slow. Fixes Audio buffering logic updated (the way I maintain the buffer between demodulation and the playback / VAC device). This is simpler, cleaner and gives me a good base for the future. See the Playback Buffering page for options. Audio recording ...
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