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Airspy HF+ Discovery SDR receiver HF and VHF

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€214.81

new version, even more compact and lighter. LW/MW/SW+VHF version of the well -known compact SDR receiver with exceptional HF properties. {

Airspy HF + Discovery receives from 500 Hz to 31 MHz and from 60 to 260 MHz. Similar to Airspy HF +, the "Discovery" works as a "zero-IF" SDR. Here, the signal received is mixed directly in the low frequency area. This technique avoids many of the problems of classic receivers, but presents new challenges to the developer. Airspy HF + Discovery faces these challenges through the use of three analog tuning. The tuner is preceded by passe-bearing filters and mobile filters. As with "HF +", the mixers are designed as a "harmonious refusal mixer" and guarantees an exceptionally good linearity and ghostly purity of the downmix signal. This is important for sensitivity, since the signal is cleaner, the lower the probability that a weak signal is lost in noise. Very powerful converters are used for digitization. The subsequent decimation phases (DDC) use different methods to reduce (decimate) the speed of data. The result is a very effective anti-aliasing filter that offers a reduction of about 108 DBC. The resulting signal has a resolution of 18 bit, which is then reduced to 16 bits for transmission via the USB 2 interface.

such a concept of receiver requires a very precise AGC to obtain the best possible sensitivity and a high dynamic range. Here the AIRSPY HF + Discovery microcontroller software controls the gain at each stage of the tuner the subsequent filters and amplifiers. The result is a dynamic interval of about 113 dB, practically resulting in 110 dB (on short waves). This is an excellent result for such a compact receiver in this price range.The user benefits from the excellent linearity and the high dynamic range of the spectrum received as this is much cleaner and without artifacts. The manual control of the amplification is not necessary, nor the use of attenuators, preamplifiers, selective pass-umband filters, etc.

In addition to the excellent characteristics of RF, the developers have also obtained the developers. A remarkable reduction in low frequency noise. Here, the disturbing noise in a useful signal is widely eliminated without intelligibility, it is affected and without too many artifacts. See under the example.

another culminating point of Airspy HF + 'Discovery', the free "spyserver" software offers an easy remote server to configure. Here, a small computer (a Pi Raspberry, etc.) can take the function of the server to which Airspy HF + 'Discovery' is connected. Through the network it is therefore possible to access the data received in the usual way and at the same time also with multiple users. The difference compared to other web-based concepts is that the actual IQ data are transmitted, therefore they can be further processed by the normal SDR software with all the plug-ins, without being hindered by the limitations of a web browser.

Software:

airpy hf + discovery 'can be used with many. different programs and on different operating systems. SDR # is probably the most suitable because it comes from the same developer.

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sdr# (Windows) {
sdr-coup (Windows) {
GQRX (Linux, macOS) {
All the software that uses EXTIO.DLL can be used for example (HDSDR, Studio1, Elad FDM-SW2) etc. {

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On this Links you will find in source code for exio . The Same Web Site Also Povides to Compiled Image, but with probably not sufficiently tested. With Wider Proliferation of the Airspy HF+ SDR This Dll Will Become More Stable, or Other Versions Will Become Available.

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Here you will find the le Open Source for different operating systems , also for Linux and MacOS.

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