[time-nuts] Ublox F9P multi-band GPS receiver

[Michael Wouters]

If you scroll down to the bottom of the product pages for the zed-f9x
modules, you'll see the 'ANN-MB', a L1/L2/E5b antenna that ublox is
presumably making to go with the ZED-F9. It's still marked 'preorder'

Cheers
Michael




On Tue, 22 Jan 2019 at 6:00 am, Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> To be more precise, what you want is a L1/L2/L5 triple band antenna.
>
> Bob
>
> > On Jan 21, 2019, at 11:32 AM, Bob kb8tq <kb8tq at n1k.org> wrote:
> >
> > Hi
> >
> > Based on the F9P data sheet, you will need an L1 / L2 antenna that is
> wide enough
> > to get the Galileo E5B as well as the Glonass L1OF and L2OF bands. The
> gotcha
> > is that (so far) I have not found a gain number for the target antenna.
> As we have
> > found on other modules, you do want to get the right gain. L1/L2
> antennas range
> > from 50+ db down to below 30 db. Simply tacking a pad on a 50 db antenna
> is not
> > the best way to do things if you are in an urban area.
> >
> > There also is the issue of powering the antenna. It is not clear what
> sort of antenna
> > bias circuit the SparkFun module has on it. If it simply is using the
> module’s bias setup
> > that also could be an issue. Max Vcc on the module is 3.6V. The VCC_RF
> pin can have
> > main Vcc - 0.1V max on it. If that *really* means that 3.3V is about it
> for antenna bias,
> > that eliminates roughly 100% of all the used antennas out there. It also
> eliminates a
> > number of the new ones.
> >
> > If you put in an external bias setup, there are a lot of antennas to
> pick from on eBay.
> > They come and go. The used stuff generally will be 12V powered. It also
> is likely
> > to have a pretty good data sheet on it. The new stuff from China seems
> to be sold
> > by a variety of people who pop up for a while and then go away for a
> while. Making
> > sure of what you are getting is a bit tough as a result. There are
> extensive stories
> > in the archives …..
> >
> > Bob
> >
> >> On Jan 21, 2019, at 10:21 AM, Graham / KE9H <ke9h.graham at gmail.com>
> wrote:
> >>
> >> What kind of antenna is needed to simultaneously hear all of the
> systems at
> >> once?
> >> My PCTel GPS antenna has a filter that limits it to only the US GPS
> system.
> >>
> >> --- Graham
> >>
> >> ==
> >>
> >> On Mon, Jan 21, 2019 at 4:01 AM Dustin Marquess <dmarquess at gmail.com>
> wrote:
> >>
> >>> If DigiKey's pricing is accurate, the ZED-F9T is $13.89 more than a
> >>> ZED-F9P.  I would have gladly paid $14 more for a version of the
> >>> SparkFun board using the T(iming) version instead :(.
> >>>
> >>> On Mon, Jan 21, 2019 at 12:10 AM Bob kb8tq <kb8tq at n1k.org> wrote:
> >>>>
> >>>> Hi
> >>>>
> >>>> From a *very* quick read of the doc’s:
> >>>>
> >>>> 1) The device *does* have a position hold capability
> >>>>
> >>>> 2) There is some level of data on the time pulse. It it only 1 ns
> >>> resolution?
> >>>>
> >>>> 3) It does appear to support Galileo and Glonas in addition to GPS.
> >>>>
> >>>> 4) It is clearly multi-band for GPS. It is unclear from a quick read
> if
> >>> it is multi-band for the other systems.
> >>>>
> >>>> 5) If you get one, make sure you have the RF cable connector it needs.
> >>>>
> >>>> 6) I have not (yet) found a recommendation for the antenna gain.
> >>>>
> >>>> Again, all from a quick read ….
> >>>>
> >>>> Bob
> >>>>
> >>>>> On Jan 20, 2019, at 5:42 PM, Mark Sims <holrum at hotmail.com> wrote:
> >>>>>
> >>>>> Sparkfun is now selling the Ublox F9P L1/L2 GPS receiver module on a
> >>> board ($219).  The F9P supports GPS/Galileo/Glonass/Beidou and tracks
> L1/L2
> >>> data.  It outputs carrier phase data and has survey-in and fixed
> position
> >>> support along with RTK support (10 mm accuracy).   Looks like the F9P
> has 1
> >>> time pulse output.
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