The world is full of software-defined radio (SDR), but HackRF One has a rather unique position – thanks to its vast maximum bandwidth of 20 MHz. With an up-converter, this combination covers more than 70 percent of the whole HF range from 3 to 30 MHz. Even better: with proper software you can record and play this enormous band!
However, this stunning bandwidth is achieved by a moderate resolution of 8 bit, resulting in a dynamic range of just nearly 50 dB. Or the half of SDRs like Elad’s FDM-S2.
Anyway. I wanted to know in practice what you can actually do with such a set at a budget price plus mostly free software. The results surprised even me: Properly used, this combination convinced as a quite decent performer on HF! The world map above shows some of the stations received with the set (see insert bottom left) to test its performance.
I laid down my experiences and recommendations for best reception in a paper of 17 multi-media pages full of examples – including 55 screenshots, 21 audio clips and one video. The PDF shows how to optimize reception of broadcast, utility and amateur radio stations. It covers many examples on how to analyze recordings, to decode data transmission with free software plus live decoding of 14 channels in parallel. It also gives some examples of combining HF reception with the internet, e.g. regarding the reception of signals from airplanes (ARINC, HFDL) and vessels (GMDSS).
My experiences really left me enthusiastic about this set.
You may share this enthusiasm and download the PDF of 43 MB here. Save it on your hard disk or USB stick, and open it with a most recent Adobe Reader. Otherwise, the multimedia content will not work.
[Einen deutschsprachigen Test habe ich jeweils als Titelgeschichte in der April- Ausgabe 2017 der Fachzeitschrift Radio-Kurier – weltweit hören und in der Mai-Ausgabe der Fachzeitschrift Funktelegramm veröffentlicht.]
The video shows how to combine some software to get and visualize more information from your HFDL monitoring.
HFDL is a data mode, intensively used between air and ground. You can receive these data and decode it with e.g. PC-HFDL software. These data maybe automatically streamed to software PC-HFDL-Display. It takes up to six sources and displays all information neatly in a spread-sheet style.
If you click on the Flight Number in the resulting spread-sheet, website flightradar24 opens up and shows the complete route of this flight, together with many other data.
Note, that not each and every Flight Number is listed on the flightradar24 page. This page relies mainly on position reports on the ADS-B network, transmitted on 1,090 GHz with a range of rarely more than 400 km. Out of this range, HFDL steps in. ADS-B plus HFDL is a charming combination as is the two software and the web service presented in the above video. Click HD button at bottom right there (“Enable HD Quality”) to get the best quality.
HOKA’s Code3-32P is a truly professional decoder in a price class which will fit into most hobby budgets. Together with Roland Proesch’s Frequency Manager it makes an even stronger companion (with your Perseus SDR) in decoding and analyzing many digimodes.
This paper is an introduction into this decoder. It’s written in German, but 17 illustrations plus Google’s Translator will help you.
Nach wie vor ist der Code3-32P von HOKA ein starker Decoder und ein zuverlässiges Analysewerkzeug für Digimodes zu einem verhältnismäßig kleinen Preis. Zusammen mit dem Frequency Manager von Roland Proesch bildet er ein nochmals stärkeres Gespann (dann gemeinsam mit dem Perseus SDR).
Dieses deutschsprachige PDF bietet auf 18 Seiten eine reich illustrierte Einführung in den Code3-32P – mit Beispielen aus der wirklichen Welt, jenseits des Deutschen Wetterdienstes …
ELAD’s FDM-S2 provides the output of three different channels within a given HF bandwidth of up to nearly 5 MHz. Hence, you may decode these channels in parallel. ARINC’s reporting system of ground and airborne stations is an excellent candidate to show this feature.
This paper is a step-by-step introduction in how to set up the receiver, the virtual audio cables (VAC), decoder, documenting software and Google Earth to show the results on the globe.
You may then easily configure hard&soft for other applications, e.g. the monitoring of GMDSS channels with communications from ship and shore.
With “Signals Analyzer”, the late Russian expert Sergey developed an excellent software to analyze digital signals. There still is no better software around to do this job at a budget price.
Signals Analyzer – Step by Step provides a short introduction in using this software with audio recordings.
It is a basic version of a German paper of 28 pages which you will find here. Thanks to its 65 and mostly self-explaining screenshots, it will make an interesting reading also for people who don’t speak “The Awful German Language” (Mark Twain, 1880). Click here to download this enlarged Version.
Google Translate also offers a great help in reading it.
[Deutschsprachige Leser finden eine mit 28 Seiten und 65 Abbildungen ausführlichere Version dieser Einführung in die Analyse-Software “Signals Analyzer” hier.]
Here you find a link to the software and to additional information.
Antonio is one of the most avid users of this software and provides many examples on how to use it on this page.