[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] USRP with Basic_RX
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] USRP with Basic_RX |
Date: |
Tue, 01 Jun 2010 15:32:14 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc12 Thunderbird/3.0.4 |
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 stock FPGA functionality of UHD, using
> VRT to separate the samples into two separate streams.
>
> Johnathan
>
>
Yes, that's precisely what I want. I want to be able to treat the two
inputs of a Basic_RX as
real-sampled data that are largely independant, but they're both tuned
to the same frequency.
This is for precision radiometry, with a "outside world" channel and a
"reference" channel.
There are a couple of approaches--one using a reference channel, and the
other switching the
entire gain chain between "outside world" and "reference". I want to
explore both options.
The switching option would use a single input, with the input switched.
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org