Step 3: Now, you need to generate your GPS-simulated "BIN" file for GPS spoofing, and for that, you need the coordinates of the location you want to simulate. Open a map app, find the location you want to spoof, and copy its coordinates. Sensitivity - More sensitive radios will be able to hear weaker stations easier, and produce high SNR values. I decide not to use this device as the users may create all kind of input conditions using wires, long antennas, open, short etc. and this device can not handle all that on such a wide range of frequencies. SNR - When receiving a signal the main metric we want to measure is the "Signal to Noise" (SNR) ratio. This is the peak signal strength minus the noise floor strength.

As the video below shows, receiving downlink signals from Coriolis with the rig wasn’t all that difficult. Even with manually steering the dish, [dereksgc] was able to record a couple of decent passes with SDR#. Making sense of the data from WINDSAT, a passive microwave polarimetric radiometer that’s the main instrument that’s still working on the satellite, was another matter. Decoded with SatDump and massaged with Gimp, the microwave images of Europe are at least recognizable, mostly due to Italy’s distinctive shape. Software Defined Radio ushered in a new era: where raw processing power could perform tasks previously restricted to hardware, and thus allowing anyone with a computer and a modest budget to dissect RF. Also has unofficially developed ExtIO interface allowing it to work with any app supporting ExtIO. For example: Connect your Android phone to your computer and launch the Dr.Fone app. Next, tap on "Virtual Location" and press "Get Started" on the next screen to initiate the process. Now, find your location on the map by pressing the "Center On" icon. We also note that the Airspy sends raw ADC samples to the PC and then must do the IQ conversion on the PC. In low IF mode the RSP does the same, but in Zero IF mode it sends IQ data. Physical Appearance and External Design

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From online reports it seems to run fine on older PC's like Core2Duos, though the maximum sample rate may be restricted. Minicircuits have quite strong PGA-103 advertising campaign what can be seen reading the various uW magazines. The technical note regarding the stabilization patch was upgraded several times. Driven by the fact that most of the buyers are probably not reading that papers they now include the patch in the datasheet too, at the very end of PDF file. Frequency Stability - We should expect the receiver to stay on frequency and not drift when the temperature changes. To achieve this a TCXO or similar stable oscillator should be used. Images/Aliasing - Bad SDRs are more likely to overload and show images of strong signals at frequencies that they should not be at. This can be fixed with filtering or by using a higher dynamic range/higher bit receiver. Step 4: Once you have copied the coordinates, execute the following command to create your GPS-simulated BIN file:

Adam describes the situation very well and believe me it is not a coincidence that a lot of preamps, e.g. for active ADS-B antennas that need a very low noise figure while having a great dynamic range magically are all being distributed with the same MMIC as the LNA4ALL and not the PGA-103+ which just looks much better on the paper. You can be sure that Adam would use the chip if it would be stable, since it is cheaper than the PSA4-5043+ and as mentioned offers less noise while having more dynamic range. I can offer the following figures for SDRPlay using API 1.8.1 which has in built I/Q balancing. Zero IF image rejection around 60 dB and low IF image rejection with 2.048 Mbps sample rate wasabout 40 dB – the image appearing 4.096 MHz below. This on the FM broadcast band – FM DXing is my main interest and images falling on a weak DX signal is the last thing that we want. These are ballpark figures merely arrived at by reading off the peak signal strength for the main signal and comparing it top the peak signal strength of the image as shown on the SDR#. For the SDRplay we used a beta version of their SDR# 1400+ plugin for their latest API which fixed most of the RSP's imaging problems. It was a beta released just to us to do this review sooner so it was a little buggy in terms of crashes, but we stress that this is not the case for the officially released plugins. SDRplay recommend using their ExtIO plugin instead, but to get fair comparison screenshots we wanted to use the same SDR# version on both Airspy and RSP tests. To be sure the plugin wasn't affecting RX results we compared it to their officially released ExtIO plugin for older versions of SDR# and HDSDR and we saw no changes in terms of signal performance. There is also the option to toggle on or off the internal Mirics chip LNA. This is the LNA in the tuner chip, and not the front end LNA which is always on for VHF+ frequencies. Turning this LNA on can help to reduce the noise floor, but also may cause additional imaging problems.The SDRplay RSP can achieve a similar effect by reducing the bandwidth displayed, however this means that a lower sample rate is used, and thus less decimation occurs. I think getting lower power consumption than Bluetooth is totally possible, if you have a huge RX bandwidth and don’t need a sync to use FHSS.