[USRP-users] Transceiver IC max2829

John Malsbury john.malsbury at ettus.com
Thu Jun 21 03:04:13 EDT 2012


Huldi,

I would recommend looking into the timed features that are available in the
master branch.  If you search for a thread with the subject ""Timed
Commands" feature" in the mailing list archives, you may find some useful
references.

Basically, the time commands to be used to deterministically tune the PLLs,
and you can use these for frequency hopping.  This might be a more straight
forward path vs. the microblaze.

-John



On Wed, Jun 20, 2012 at 11:15 PM, Huldi Michael <huldm1 at bfh.ch> wrote:

> First I will study this file. Yes I try to realize a frequency hopping.
> Thanks.****
>
> ** **
>
> *From:* John Malsbury [mailto:john.malsbury at ettus.com]
> *Sent:* Mittwoch, 20. Juni 2012 01:31
>
> *To:* Huldi Michael
> *Cc:* usrp-users at lists.ettus.com
> *Subject:* Re: [USRP-users] Transceiver IC max2829****
>
> ** **
>
> Huldi,
>
> If you're interested in understanding how to interact with the XCVR2450,
> please look at db_xcvr2450.cpp.  If you wish to reduce the ref input
> frequency you can decrease the output frequency of the AD9510(may have
> other consequences), or by increase the divide value of the AD9515 on the
> daughterboard.  However, it seems that tuning works with the constraints
> currently set in db_xcvr2450.cpp, so I would start with that as a baseline
> for your application.
>
> Just out of curiosity, what are your intentions with the microblaze?  Are
> you trying to produce some sort of frequency hopping capability, or are you
> trying to create a standalone radio with the microblaze?  There may be an
> easier path.
>
> -John
>
>
>
>
> On 06/19/2012 04:30 AM, Huldi Michael wrote: ****
>
> Yes, with USRP N210 and daughterboard xcvr2450.****
>
>  ****
>
> *From:* John Malsbury [mailto:john.malsbury at ettus.com<john.malsbury at ettus.com>]
>
> *Sent:* Dienstag, 19. Juni 2012 13:23
> *To:* Huldi Michael
> *Cc:* usrp-users at lists.ettus.com
> *Subject:* Re: [USRP-users] Transceiver IC max2829****
>
>  ****
>
> Are you developing this on a usrp, with an xcvr2450?
>
> John
>
>
>
> On Tuesday, June 19, 2012, Huldi Michael <huldm1 at bfh.ch> wrote:
> > Hello,
> >
> > In the datasheet of the transceiver IC MAX2829, which is on the
> daughterboard xcvr2450, I read that the reference oscillator input on pin
> 30 need to be 20 – 44 MHz. But I measured a clock of 50 MHz on this pin.
> Does someone have an explanation for that?
> >
> > I have to know this because I write my own driver in C for the
> transceiver IC. The transceiver IC is driven of my microblaze via SPI.
> Perhaps someone has already done similar work?!
> >
> > Huldi Michael
> >
> >
> >
> >   ****
>
> ** **
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20120621/f7ca9343/attachment-0002.html>


More information about the USRP-users mailing list