Submitted by RED on Tue, 07/30/2019 - 19:14
Forums:
I tried to get dump1090 to work and it refused to run after the long calibration wait
Purchased from https://www.ebay.com/itm/DVB-T-DAB-FM-RTL2832U-R820T-Tuner-Mini-USB-RTL-...
Is there a special antenna I still need?
Probably a wrong RF Mixer IC front-end
Not all rtlsdr boards are created equal, and some are rather limited in scanning range. The sellers know this, and bait-and-switch with inferior models is a common scam.
I am almost certain if you plug in that dongle, and type into a command terminal:
lsusb
Then search the web for your xxxx:yyyy USB ID model.
You will likely see that it is not a true 820T mixer chip inside. This will mean you will be limited to below whatever range cutoff frequency your hardware can handle.
Note, there are better RTL-SDR Blog R820T2 RTL2832U versions around which even have a bias-t (for external LNA) and 50 ohm built-in (normal RF module support). Also, the more stable 1ppm clock source will actually allow you to use the GHz ranges with some degree of scan repeatability. For $30 it is probably the lowest cost entry level SDR model, and is 1/10 the cost of a limeSDR system.
Cheers,
J
RTL2838
I get this in my list
Bus 003 Device 003: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
which is listed as compatible
http://www.rtlsdr.com/2012/04/rtlsdr-compatibility-list/
Tuner Frequency Ranges depend on the model
Examples of various versions:
Plug in your USB dongle again and run the test program:
rtl_test -t
If it confirms you have a "FC0012", than you cannot scan 1090MHz. However, it should still work for projects like AIS on 168MHz etc.
I would suggest you leave feedback warning other buyers of this obviously lower frequency unit.
73
thank you
It was the FC0012 type :(