Feeding 12VDC through COAX using DBSRX

GNU Radio
1

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)?

Thanks,
Patrik

2

Patrik T. 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

3

Hi Matt,

Many thanks for your clarification.

Thanks,
Patrik

----- Original Message -----
From: “Matt E.” [email protected]
To: “Patrik T.” [email protected]
Cc: [email protected]
Sent: Friday, October 23, 2009 8:56
Subject: Re: [Discuss-gnuradio] Feeding 12VDC through COAX using DBSRX