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DC voltage for active antenna?
Posted: Fri Mar 11, 2016 7:29 pm
Just wondering if the SDRplay antenna connector contains a DC voltage suitable for powering an active antenna. I want to do some GPS experimenting using SDRplay and need to figure out a good antenna -- I already have an active antenna for GPS that requires +5 volts.
Advice much appreciated.
Re: DC voltage for active antenna?
Posted: Sat Mar 12, 2016 3:45 pm
No, unfortunately it doesn't. The antenna connector is simply capacitively coupled to the input circuitry. It shouldn't be too difficult to design a dc filter with rf chokes to isolate the rf from the dc source.