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

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Feeding 12VDC through COAX using DBSRX
Date: Thu, 22 Oct 2009 22:56:32 -0700
User-agent: Thunderbird (X11/20090825)

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.


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