Re: [Discuss-gnuradio] Synchronize USRP using 5Hz pps

[Josh Blum]

Using a 5Hz PPS is not fundamentally different than 1Hz. That should not
be a problem.

Make sure your pulse has the correct levels:
http://www.ettus.com/uhd_docs/manual/html/usrp2.html#pps-pulse-per-second

-Josh

On 01/18/2011 05:36 PM, Sangho Oh wrote:
> Hello,
> 
> I am using Garmin 18 5Hz PPS clock for USRP synchronization.
> 
> This is the GPS: https://buy.garmin.com/shop/shop.do?pID=8631
> 
> However, because it is 5Hz PPS not 1Hz, the synchronization looks not
> working properly.
> 
> I got following message on the time stamp reading after 1 sec.
> 
> "Creating the usrp device with: ...
> Current recv sock buff size: 50000000 bytes
> Synched to PPS: Reading time 1s later: 0.829645"
> 
> As you see, the time reading after 1 sec is smaller than 1 sec.
> 
> I am wondering if I have to buy another GPS for 1 Hz PPS.
> 
> Thanks.
> 
> - Sangho
> 
> 
> 
> 
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