[USRP-users] using tune_request_t
sanatgulvadi at gmail.com
Wed Jun 27 08:52:14 EDT 2012
I'm sorry for asking again. But could you please tell me if the following
line will help push out the dc component outside my band.
Here I am trying to tune to 2.44 GHz and my sampling rate is 100e6/64.
Should this work ?
On Tue, Jun 26, 2012 at 7:37 PM, Josh Blum <josh at ettus.com> wrote:
> On 06/26/2012 12:39 AM, Sanat Gulvadi wrote:
> > Hi Josh,
> > I actually read through those pages before I emailed the list. Just want
> > know if lo_offset is the variable that represents the frequency offset by
> > which I have to push the dc or if it's the frequency to which I want to
> > the dc to.
> The constructor with the lo_offset will do exactly this.
> > Also is it necessary to set the policy to manual first ?
> No, the constructor with lo_offset sets this automatically.
> > Regards, Sanat
> > On Jun 26, 2012 8:30 AM, "Josh Blum" <josh at ettus.com> wrote:
> >> On 06/25/2012 11:17 PM, Sanat Gulvadi wrote:
> >>> Greetings,
> >>> I have a question about using the tune_request_t in my application. I
> >> have
> >>> read from previous posts that there is an inherent DC component at the
> >>> receiver which cannot be eliminated but can be pushed so that it occurs
> >>> outside the band of interest.
> >>> When I use
> >> I
> >>> am not sure what lo_offset is. I assume target_freq is the center freq
> >>> which I want the RF to tune to. Is lo_offset the offset by which I want
> >> to *
> >>> push* the DC component so it ends up outside my band of interest ?
> >> You might find helpful notes here:
> >> http://files.ettus.com/uhd_docs/manual/html/general.html#tuning-notes
> >>> So in this case, if I made lo_offset say, once or twice my sampling
> >>> should this be enough to accomplish this? Do I have to additionally set
> >> the
> >>> tuning policy to POLICY_MANUAL ?
> >> That constructor w/ the LO offset is simply a shortcut for doing this.
> >> -josh
> >> _______________________________________________
> >> USRP-users mailing list
> >> USRP-users at lists.ettus.com
> >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the USRP-users