Re: [Discuss-gnuradio] Failure of sending square wave over USRPs (back-to-back)

[Tom Rondeau]

On Sat, Mar 15, 2014 at 10:46 AM, Activecat <address@hidden> wrote:
> On Sat, Mar 15, 2014 at 5:14 PM, Sylvain Munaut <address@hidden> wrote:
>>> You may refer to previous conversations.  Do you agree with him that a
>>> simple quadrature downconverter doesn't need to care about clock drift
>>> because it just "simply downconverter and nothing more"?
>>
>> Yes ...
>>
>> Cheers,
>>     Sylvain
>
>
> In this case I shall rephrase my question to:
> "How to compensate the error due to clock drift which is not handled
> by a simple quadrature upconverter ?"
>
> Could anyone of gnuradio forum gives me some idea ?
> I hope this is no longer categorized as expecting Ettus to teach me
> the fundamentals of RF.

Activecat,

It was mentioned earlier in this thread, you can use a PLL to lock to
a carrier. Basically,  you need an algorithm that performs carrier
recovery.

This thread is starting to get a little too confrontational, so we all
need to take a bit of a break. Please take a look at the PLL blocks in
GNU Radio; you can find them under the Synchronizers category in the
block tree of GRC. Spend some time understanding these blocks and how
to use them. If you still have questions, please open another email
thread.

Thanks,
Tom