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

[Eric Blossom]

On Sat, Dec 30, 2006 at 07:23:19PM -0800, Matt Ettus wrote:
> Eric A. Cottrell wrote:
> > Hello,
> >
> > Does anyone use a AOR 5000 as a front end for the USRP?  The docs for
> > the USRP say that it is not very sensitive but I thought the IF Output
> > from a AOR 5000 could drive it.  It seems to work for strong signals but
> > I am getting the impression that a 10 dB or so amplifier would improve
> > the situation.
> 
> Did you turn up the RX PGA gain?  You can get an additional 20dB there. 
> Also, the BasicRX and LFRX inputs are 50 Ohms.  Can the AOR drive that?

On my AR8600, I need to use 10 to 20dB of gain between the output of
the 8600 and the USRP basic rx.  It depends _highly_ on which band
I'm tuned to.  BTW, on the AR8600, there's a slight mod you've got to
make to the board to enable the IF output on all the bands.

Eric