Re: [Discuss-gnuradio] USRP2 PPS and REF

[Eric Blossom]

On Mon, Feb 09, 2009 at 10:50:44AM -0500, Suprin, Charles E. wrote:
> Hello,
> 
> I have hooked up the USRP2 to a PPS and a GPSDO 10MHz reference.
> 
> Is there a way I can tell if the FPGA is seeing these signals and locking 
> onto them?
> 
> Charles

Hi Charles,

You have to tell it to use them.

Take a look in <usrp2/usrp2.h>:

  config_mimo(MC_WE_LOCK_TO_SMA)
  sync_to_pps()

There are python bindings for these.
(Oops, looks like we're missing the python binding for config_mimo...)
Are you using this from Python?  If so, I'll fix this later on today.

Eric