> From: Marcus D. Leech
> Subject: Re: [Discuss-gnuradio] USRP with Basic_RX
> To: "Johnathan Corgan" ,
> Discuss-gnuradio@gnu.org
> Date: Tuesday, June 1, 2010, 2:32 PM
> On 06/01/2010 03:15 PM, Johnathan
> Corgan wrote:
> >
> > I think he's us
On 06/01/2010 03:15 PM, Johnathan Corgan wrote:
>
> I think he's using a USRP2. Isn't the dual source USRP1 only?
>
> What he's asking for is a dual, coherent DDC for the I and Q inputs of
> a BasicRX in a USRP2. This is a common enough request that I think it
> would be useful to put into the st
On Tue, Jun 1, 2010 at 11:47, Josh Blum wrote:
> go with the dual usrp source in grc, setup the antennas and sides correctly
> and it should work :-)
I think he's using a USRP2. Isn't the dual source USRP1 only?
What he's asking for is a dual, coherent DDC for the I and Q inputs of
a BasicRX i
On 06/01/2010 02:47 PM, Josh Blum wrote:
> go with the dual usrp source in grc, setup the antennas and sides
> correctly and it should work :-)
>
> -josh
H, OK. But this is a *single* BASIC_RX card. Is that still going
to work?
--
Principal Investigator
Shirleys Bay Radio Astronomy Consort
go with the dual usrp source in grc, setup the antennas and sides
correctly and it should work :-)
-josh
On 06/01/2010 11:12 AM, Marcus D. Leech wrote:
On 06/01/2010 11:38 AM, Josh Blum wrote:
You are seeing the lower bound clipping in the nlog10 block. Try
looking at it with the scope sink,
On 06/01/2010 11:38 AM, Josh Blum wrote:
> You are seeing the lower bound clipping in the nlog10 block. Try
> looking at it with the scope sink, you should see some bits twiddle in
> the wind. -Josh
II puut 40dB of 50MHz-low-pass-filtered gain in front of the Basic_RX,
and now it's "rational". :-)
You are seeing the lower bound clipping in the nlog10 block. Try looking
at it with the scope sink, you should see some bits twiddle in the wind.
-Josh
On 05/31/2010 03:03 PM, Marcus D. Leech wrote:
I'm trying to "carve off" about 250Khz of bandwidth around 38.5MHz,
(actually any frequency
On Mon, May 31, 2010 at 15:03, Marcus D. Leech wrote:
> I set the tuning parameter of the source to 38.5MHz, and what I get on
> the FFT is a flat-line at -410dB! Now, granted, I don't have the inputs
> connected to anything
> yet, but I would expect there to be *some* noise, and -410dB seems
I'm trying to "carve off" about 250Khz of bandwidth around 38.5MHz,
(actually any frequency
between about 25MHz and 40MHz) using a Basic_RX and a USRP2.
In GRC, I created a simple flow-graph with a USRP2 source, and an FFT sink.
I set the tuning parameter of the source to 38.5MHz, and what I ge
