rtl-sdr.com

Remember that if you're using it for DOA you'll need to have the antennas arranged in a certain pattern with certain spacing.

Using a whip antenna won't hurt the unit though. Although as you've already seen, WiFi antennas typically use RP-SMA connectors which won't work here.

We don't have a schematic sorry the hardware isn't open source.

The TCXO is 1PPM or better, so that should be good enough for GPS decoding. Same TCXO as used in the V3.

Make sure that you've closed all other programs that are accessing the dongle, otherwise those programs will block Unitrunker from being able to access it.

What do you mean by connecting it to electronics?

If you have a TX capable SDR you can simply restransmit the signal being received, but I don't understand what the point of that would be, unless you're doing some DSP to the signal in software first.

By poll the signal, do you mean that you are actually trying to sample it with the ADC on the micro, and bypass the RTL2832U?

I'm not sure exactly what it is you're doing, but at the moment if you're wanting to do coherent stuff you're going to need to be able to run the GUI.

If you just want to enable the bias tee, you can use the command line software rtl_biast for the V3, explained here www.rtl-sdr.com/V3.

So the LNA i bought is not made by Nooelec, it's by a british company called Uputronics. They work together with Airspy i think. The LNA is placed directly at the antenna, only about two feet of coax away. Ah okay, I know about the Uputronics LNA. This one has the LNA before the SAW filter (so the ...

Sorry it's just not easy to troubleshoot antenna issues. How does the signal look like when you're receiving it? Also what exactly is the Nooelec LNA that you have? AFAIK they haven't actually released a 137 MHz LNA yet. Are you sure that the LNA you have is for 137 MHz? Got a link to the one you ha...

With a our RTL-SDR Blog V3, you don't need an upconverter as you can use direct sampling mode. But an upconverter could get you better RX performance especially if you have strong interfering signals.

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