Receiver SDR Airspy
The Airspy R2 is one of the best-known SDR receivers on the market. It offers continuous coverage from 24 to 1800 MHz, making it suitable for analyzing and receiving a large number of VHF and UHF signals. To receive the entire HF band (plus medium and long waves) there is an up-converter, perfect calibrated to match the receiver.
For applications in limited spaces, the Airspy SDR is also offered as the Airspy Mini, in the traditional USB stick format. The receive parameters remain similar, only some components and some features are removed due to space restrictions.
Airspy is an ideal combination
The real capabilities of an SDR receiver are determined - what a surprise :) - by the software. The designers of the Airspy SDR are the same people who wrote the SDR software (SDR sharp). Thanks to this development perfectly aligned between hardware and software, the result is a system with performance difficult to reach by other manufacturers. For good reason, SDR software is one of the best-known and most widely used programs for SDR applications; It's easy to use and offers many intuitive features for various operations. The "open plugin" architecture allows other programmers to offer additional new features, so that they can be combined by the user as needed. Thanks to the parallel development of hardware and software, the Airspy and SDR are perfectfore touts to work together.
Airspy R2 - Description
The Airspy R2 receiver is built around the widely used R820T2 tuner chip produced by Rafael Electronis. Combined with a powerful 32-bit Cortex ARM processor, and a fast 12-bit AD converter, the Airspy can get much more out of this tuner chip than the classic DVB-T sticks with RTL chipsets. For example, the ARM processor can process much larger data moles, which translates to the user in larger portions of spectrum. The Airspy can show 10 MHz on screen (9 MHz without image frequencies). The Cortex ARM processor is also responsible for the fast data transfer through the USB 2.0 interface.
The SDR uses a special clock generator with very low phase noise and an accuracy of .0.5 ppm. The low phase noise helps to achieve greater sensitivity and dynamic range of the receiver. An interesting feature of the Airspy R2 is the ability to inject an external clock. The latter can come from a Rubidium clock generator or a GPS-disciplined oscillator, to achieve measurements more accurately, or to correlate multiple receivers. Several GPIO ports are available to control external devices. A bias voltage can be provided on the antenna connector to power external amplifiers or special converters (see below) (4.5V, max. 50mA).
Another important feature is the open documentation for software interfaces (APIs). Even if you yourself are not a software developer, you will benefit from this opprtunity because other software engineers can (and do) provide extensions, plugins and their programs for the Airspy. For example, you can find DLLs or ExtIO drivers for other operating systems. The firmware of the Airspy ARM processor is also available in source code and allows to be modified.
For users who do not need the most advanced functions (external clock input, GPIO ports, etc.) of the Airspy R2, or where the space available is reduced, we offer the smaller Airspy Mini. This SDR has the shape of the classic USB stick and contains the same function blocks as the big brother: R820T2, LPS4370 ARM CPU, 12-bit ADC, tCXO low-sounder. The result is a receiver with characteristics really similar to the Airspy R2.
See here for instructions on how to use the Airspy as an ADSB 'Flightradar'.
Being the project based on the TUN2 R820T2, the Airspy begins to receive at 24 MHz. If you want to axe the entire band of long, medium and short waves, you can use the Spyverter R2 converter. This up-converter is perfectly adapted to the Airspy receiver, but can be used with almost any other SDR. The power of the converter can be supplied either through the receiver's antenna connector or through the micro USB connector. These independent feeds make the Spyverter R2 usable with any other receiver. The reception range ranges from 1 kHz to 60 MHz, the converted output ranges from 120 to 180 MHz. The IP3 value of the converter is an excellent .33dBm, additional filter at 60 MHz and 120/180 MHz reduce interference.