[time-nuts] ZED F9T first look

[Bob kb8tq]

Hi

Not to surprisingly: the same set of tests on the F9P give pretty much identical results. He ran
a bunch of navigation tests. Not at all surprising. It wouldbe nice if *somebody* could get that 
board and compare it to a Cs …. maybe also check it out against a popular piece of software 
as well ….hmmm….

Things may be moving along ( = getting better) as far as sawtooth correction of the F9P PPS 
output.  If something becomes available to look at there should be a pretty good way to check 
it out. 

Another firmware update for the F9P came out in the last week or two. No big or really useful 
improvements. It does appear that the use of the EXT-INT pin as a “measure a pps” (to within
8 ns ….yuck …) has vanished. Not clear at all if that change is temporary or permanent. 

The Digikey C099-F9P kit from uBlox does seem to do all it is supposed to. The puck antenna
that comes with it is nothing fancy, but it does work. The $80 eBay antennas do a better job. It 
the kits ever come back into stock, they are a better deal than the Sparkfun boards. 

Bob

> On Mar 3, 2019, at 6:55 PM, Chris Burford <cburford1 at austin.rr.com> wrote:
> 
> For those that are interested in the soon to be released ZED-F9T receiver here is a quick write up on the RTLExplorer blog:
> 
> https://rtklibexplorer.wordpress.com/
> 
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