Re: [Discuss-gnuradio] Feeding 12VDC through COAX using DBSRX

[Matt Ettus]

Patrik Tast wrote:
> Hi All,
>  
> At the moment I feed 12 VDC into COAX outside Ettus USRP1 12VDC to power 
> my LNA. I have a DC-Block
> at the receiver to prevent voltage back into the DBSRX-LF REV 2.2.
>  
> Connector J100 say Antenna Bias + and GND 500mA @ 6V.
>  
> My question is, is it possible to feed 12V to the J100 without damaging 
> the unit(s)?


You can feed 12V into pin 1 of J100, with pin 2 as ground.  Don't 
connect anything to J101.  Don't draw more than 200 or 300 mA.

Matt