Re: [Discuss-gnuradio] AOR 5000 as front end to USRP

[Eric Blossom]

On Sun, Dec 31, 2006 at 01:42:31PM -0500, Eric A. Cottrell wrote:
> Hello,
> 
> Thanks to both of you for the information.  I got the RX PGA gain up all
> the way.  I rewound the isolation transformer to be 1:1 with 14 turns.
> I still have to turn off AGC for good signal levels but I got 20 to 30
> dB SNR on RCI at noon today.
> 
> Doing some simple tests with the PSD display in DReam I can not see the
>   noise floor increase when the receiver connected.  The FFT from the
> USRP data also shows no increase so an amplifier is needed.  What
> amplifier do you use on the AR8600?

I used a Ramsey PR2 broadband preamp (it's probably overkill, but it's
what I had on hand)
http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=PR2

Eric