Re: [Discuss-gnuradio] Synchronization issue with multiple USRPs

On 05/25/2011 10:51 AM, Douglas Geiger wrote:
> On Wed, May 25, 2011 at 10:14 AM, Josh Blum <josh@ettus.com> wrote:
>>
>>
>>
>> 2) Calibrate the setup. After you tune, the daughterboard LOs will have
>> different constant phase offsets. With boards like WBX, its actually
>> possible to sync the LOs using hardware, but this isnt implemented yet.
>> In any case, *no matter what*, you need to calibrate by passing in a
>> common signal and measuring your channels.
>>
>
> What will it take to implement syncing the LOs on the daughterboards
> that do support this - is this on the roadmap for UHD currently?
>

Basically a timed spi command can sync the LOs. Its on the roadmap. That
wont forgo the need for calibration mind you. -josh

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