Re: [Discuss-gnuradio] Locking USRP2 to external 10MHz reference in the UHD/GRC universe

[Josh Blum]

Swig brings in the clock config struct into python. The python code 
looks like:

>>> from gnuradio import uhd
>>> ccfg = uhd.clock_config_t()
>>> ccfg.ref_source = ccfg.REF_SMA
>>> ccfg.pps_source = ccfg.PPS_SMA
>>> ccfg.pps_polarity = ccfg.PPS_POS

so the the grc xml wrapper you need that bit of code along with

$(id).set_clock_config(ccfg)

-Josh

On 08/22/2010 04:52 PM, Marcus D. Leech wrote:
> How do I arrange to lock the USRP2 to an external 10MHz reference in the
> UHD+GRC world?  Is there an "arg" I can pass when I
>    create the UHD USRP2 simple source in GRC?
>
> This is for some pulsar research, where an external stable reference
> makes life soooo much easier.