A few ideas for what to do with a USB RTL-SDR receiver..
Test 1: Listen to your local radio stations using CubicSDR. I could not get SDRSharp to work with my NOOELEC USB RTL-SDR.
Test 2: Listen at 1090Mhz for aeroplane ADS-B transmissions.
https://en.wikipedia.org/wiki/Automatic_dependent_surveillance_%E2%80%93_broadcast
To decode the transmissions at 1090Mhz I used the Windows application from https://rtl1090.com/
https://www.jetvision.de/manuals/rtl1090imu.zip
RTL1090 is configured by default to use port 31011
Download Virtual Radar from http://www.virtualradarserver.co.uk/download.aspx
Then using Virtual Radar configure your receiver (Options --- Receiver) to use port 31011 to receive the feed from RTL1090
Test 3: Watch DVB-T
The drivers for DVB-T and SDR use are different according to the rtl-sdr website.
https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/
I download the drives that are recommended by the rtl-sdr guide. The link is to an application that includes Blaze media application
which requires a license. But there is also the drivers in the same zip file. So just install the drives from the driver
folder! This installed an "RTL2832UUSB" driver fr DVB-T.
Then using VLC add your local DVB-T frequency and bandwidth. To change channel just use the fast forward button in VLC.
Saorview frequencies
http://www.rtenl.ie/wp-content/uploads/2012/11/SAORVIEW-Frequencies-Rev-2.5.pdf
Test 4: Transmit and receive RTTY messages using an NTX2B transmitter in the unlicensed 434Mhz band.
You need to replace the driver for DVB-T with one suitable for CubicSDR. Rerun the Zadig application.
If you are receiving packets but not tracking any flights in Virtual Radar, you may have to change the format to RAW from the default under options. There is a wizard under options to select SDR rather than RTL1090.
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