On 07/10/2018 01:40 PM, Marcus D. Leech wrote:
>> It seems to work properly. I get indications during start up that the
>> E310 is selecting the clock_rate per my settings, and it's also not
>> throwing any decimation error when I deliberately mismanage the
>> clock-sample rate ratio.
>>
>> So, does anyone see a problem with what I've done or how?
>> Is there a doc with these settings spelled out?  I recall digging hard
>> even for samp_rate and center_freq.
>>
>> Thanks!
>>
>> Mike
>>
> Actually, normally, the master_clock_rate is set in a device argument:

The AD9361-based devices allow modifying the sample rate at runtime, and
the E310 is one of those devices.

-- M


> 
> https://files.ettus.com/manual/page_configuration.html
> 
> Although gr-uhd exposes a set_clock_rate() method, GRC doesn't
> necessarily make use of that.
> 
> The UHD USRP source block, at least in GRC, already includes Sample Rate
> and Tuning parameters, so I'm not sure where the
>   "digging hard" would be, and the documentation for g-uhd, if you're
> not using GRC, is relatively easy to find:
> 
> https://www.gnuradio.org/doc/doxygen/group__uhd__blk.html
> 
> There's nothing AT ALL special about the "samp_rate" variable, other
> than many blocks, by default, use it.  There's no *requirement* to
>   use that variable.
> 
> 
> 
> 
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> Discuss-gnuradio@gnu.org
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