Tag Archives: SDR

HDSDR version 2.76: updates and additions

Many thanks to Light Coder at HDSDR who notes a recent update to HDSDR:

HDSDR bugfix release 2.76 just went online.
There are also some minor additions.
See http://hdsdr.de/wnew.html

Think it’s worth to have a look into the keyboard shortcuts:

Many thanks! HDSDR is a great (free!) SDR app–happy to hear about this recent update including keyboard shortcuts.

Propagation-Triggered Spectrum Recording

Many thanks to Jon Hudon of SDRplay who shared the following on the SDRplay Facebook page:

One of the SDRplay user community, Jukka, has started an interesting discussion on what he has called ‘propagation-triggered recording’ – he outlines the concept, and what he is doing, on our forum – see http://www.sdrplay.com/community/viewtopic.php?f=9&t=1839

The idea is that you monitor signals to determine if conditions are particularly good and can thereby trigger an I/Q recording of a whole band during that particular propagation high point -Jukka welcomes more comments on this idea.

Many thanks, Jon. I would certainly be a fan of this as so many times I’ve missed fantastic band openings while travelling. It would be nothing short of brilliant to come home to automatic SDR spectrum recordings taken during prime propagation. At the moment, propagation is so dismal, rare openings are worth recording!

As Jon points out above, check out the SDRplay forum for more details.

The Icom IC-R8600 shipping early 2017

The Icom IC-R8600 (Image source: Icom)

This morning, while browsing the latest ARRL QST magazine, I noticed an advertisement for the new Icom IC-R8600 wideband receiver.  If you recall, last August, Icom made the announcement that it was introducing two new receivers: The IC-R8600 and the IC-R30 handheld.

The IC-R30 is the successor to the IC-R20 compact handheld receiver, but will have advanced receiving capabilities and be able to decode D-STAR, P25, NXDN and dPMR digital (conventional) modes.

Icom IC-R8600 back panel (Image source: Icom)

The IC-R8600, on the other hand, is more akin to the IC-7300 transceiver in terms of design, but has much more functionality than the IC-7300 and covers a wide range of frequencies (10kHz-3GHz).

The Icom IC-R8600 is essentially a tabletop SDR receiver.

Here are a few features mentioned on the IC-R8600 pre-release brochure:

  • Ultra-wide frequency coverage with RSSI (Received Signal Strength Indication) function
  • Fast moving, real-time spectrum scope and waterfall functions
  • Decodes multiple digital protocols, including D-STAR, NXDNTM, dPMRTM and APCO P25
  • Large 4.3 inch TFT color touch screen display
  • Clear audio quality using FPGA/DSP base architecture with superheterodyne circuitry
  • Optional RS-R8600 PC remote control software allows control of all receiver functions
  • I/Q signal output for use with third-party SDR software and/or external decoding
  • The SD card slot for received log, decode log and voice recording
  • Optional SP-39AD external speaker with integrated power supply

The back panel connections are pretty comprehensive (click to enlarge):

I will plan to review the IC-R8600 once it has become available. I have no clue yet what pricing will be.

I will post all IC-R8600 updates with the tag: IC-R8600

Cloud-SDR: a remote access system for a number of popular SDRs

Many thanks to SWLing Post reader, Sylvain (F4GKR), who writes:

I am Sylvain, from Cloud-SDR, a new company selling software to get remote access to your existing SDR receivers through the Internet.


  • currently supports : SDRPlay, Perseus, BladeRF and AirSpy. LimeSDR to come when received and tested.
  • client software is free (can be used as standard SDR receiving software with locally connected devices),
  • server software starts at 110 Euros, VAT may be added depending on customer location,
    easy to use

From the Cloud-SDR website:

The Cloud-SDR Concept

You need a way to remotely access your existing SDR receiver? To stream your IQ samples to another remote computer over the network?

Cloud-SDR is a commercial software solution to enable real time RF data sharing or processing through the cloud.

Cloud-SDR can collect real-time IQ complex samples from an SDR hardware device connected on one machine, stream the samples to a second machine for demodulation or analysis, then send the resulting stream to third machine for storage.

In standalone mode, Cloud-SDR can execute signal processing tasks described with embedded JavaScript DSP engine.

Because network bandwidth is limited compared to SDR receiving bandwidth, the core concept of Cloud-SDR is to move the processing along the cloud to where it is required or possible : the DSP chain is divided in sub-tasks that are spread between computers interconnected through Internet.

Very cool, Sylvain!

I like the fact your system supports popular affordable SDRs like the SDRplay RSP & AirSpy and that you can stream your IQ samples.

Click here to read more on the Cloud-SDR website.

Build a Raspberry Pi-powered SDR

Many thanks to SWLing Post contributor, Jeremy Clark (VE3PKC), who writes:

I have developed an SDR receiver that may be of interest to your readers. It can be used directly with the Raspberry Pi2B/3B. It comes in several versions DIP/SMD.

Check out this MP4 movie:

I have two eBooks which are basically design manuals for the DIP and SMD version of my SDR receiver. Each eBook has an Internet linked parts list, so that the reader can get their own parts to keep costs down. The DIP eBook is $7.90 CAD and the SMD book is $14.90 CAD.

Click here to view Jeremy’s website.

Thank you, Jeremy–this looks like a fascinating construction project!

Readers: just to be clear, Jeremy is selling eBooks detailing construction–not kits. He did mention if you’re interested in obtaining the PCB, he can sell this as well.