[time-nuts] Looking for advice to get a submillisecond setup

Dave Martindale dave.martindale at gmail.com
Fri Feb 20 13:12:21 EST 2015


Standalone receivers don't have to be expensive.  Take a look at the GPS 
receiver modules at sparkfun.com.  They are under $100 (some way under), 
and some either require or can take an external antenna, and they 
provide 1 PPS output.  Garmin themselves sells receiver boards without 
integrated antennas.

Now, they are navigation not timing receivers, so the 1 PPS accuracy is 
likely only a microsecond or so, not in the nanosecond range. But that's 
plenty for NTP.  And because they are recent receiver designs, they have 
higher sensitivity and faster acquisition than older receivers.  Some 
support WAAS corrections.

-Dave

On 20/02/2015 10:25, Jim Lux wrote:
>
>> And yes, a gps antenna needs a good view of the sky, but the receiver
>> itself can be 100+ meters away from the antenna
>
> I think you're getting into receivers that are well into the hundreds 
> of dollars range, if bought new.



More information about the time-nuts mailing list