[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Help : Is this right that the daughterboard passe

From: ton ph
Subject: Re: [Discuss-gnuradio] Help : Is this right that the daughterboard passes data to the usrp board in the I and Q format.
Date: Mon, 25 Apr 2011 13:15:15 +0530

Thank marcus for the information ,
  Thou it may be a out of track question , is that possible by using any of the daughter board available to process 100 Mhz of bandwidth ... more correctly what can i do, for Exp: if i want to access a bandwidth of range 105 Mhz ... will usrp be able to support, because as i think gnuradio can support only 8Mhz bandwidth at a time , will we be able to make changes in gnuradio ? ....  I highly apologize if any of my question is illogical or out of track.


On Fri, Apr 22, 2011 at 7:14 PM, Marcus D. Leech <address@hidden> wrote:
On 04/22/2011 01:54 AM, ton ph wrote:
> Hi guys ,
>     I am using DBSRX , now i am trying to trace the data flow in the
> usr-gnuradio . I see AD9862 ADC  in the usrp and some of the block
> diagrams , and i think that the daughterboard
> passes the analog signals to the ADC in the I and Q format . Please
> guide me if this is right or wrong ... Thanks .
That is precisely correct, yes.  Most daughterboards use an analog
quadrature mixer to produce
 a complex (I and Q) baseband signal.

The TV_RX is one that *doesn't* -- it's a conventional superheterodyne
receiver, with a final IF
 frequency of (as I recall) 5.75MHz, which is passed to a single ADC
channel, and the FPGA
 mixes it down to a complex baseband digitally using a digital
quadrature mixer.

Principal Investigator
Shirleys Bay Radio Astronomy Consortium

Discuss-gnuradio mailing list

# Life is the most precious phenomenon ever happen ...
# Lets pray and give emotional strength to the innocent brave victims of japan.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]