Richard Laager via devel writes:
> Upon further investigation, there is a concern about the GPS antenna
> placement.
What concern(s)?
> Does anyone have recommendations for GPS antenna RF-to-fiber converters
> or other ways to have the GPS antenna a long way (in a building) from
> the GPS receive
> Does anyone have recommendations for GPS antenna RF-to-fiber converters or
> other ways to have the GPS antenna a long way (in a building) from the GPS
> receiver?
How far is "a long way"?
One approach is amplifiers and coax. The most cost effective coax is the good
cable TV stuff. RG-6,
Upon further investigation, there is a concern about the GPS antenna
placement.
Does anyone have recommendations for GPS antenna RF-to-fiber converters
or other ways to have the GPS antenna a long way (in a building) from
the GPS receiver?
--
Richard
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Yo Richard!
On Sat, 23 Nov 2019 02:09:37 -0600
Richard Laager via devel wrote:
> On 11/13/19 1:43 PM, Gary E. Miller via devel wrote:
> > A simple u-blox
> > NEO-M8N for $10 will do. Then $5 for a TTL to RS-232 converter.
> >
> > Get one of these NEO-M8N for $7:
> >
> > https://www.ebay.com/i
Richard Laager via devel writes:
> These aren't actually NEO-M8N. Are you saying that these ATGM336H-5N are
> good enough?
If you want to build up multiple GPS receivers the best deal available
is still this:
http://navspark.mybigcommerce.com/navspark-mini-6pcs-pack/
With the accompanying patch
On 11/13/19 1:43 PM, Gary E. Miller via devel wrote:
> A simple u-blox
> NEO-M8N for $10 will do. Then $5 for a TTL to RS-232 converter.
>
> Get one of these NEO-M8N for $7:
>
> https://www.ebay.com/itm/Replacement-NEO-M8N-GPS-BDS-Dual-mode-Module-Flight-Control-Satellite-ATGM336H/182622902135
On Wed, Nov 13, 2019, at 09:38, Richard Laager via devel wrote:
>
> It'd be nice if we could also replace the dead GPS master clock with a
> directly connected GPS receiver, so we get PPS into the server (e.g. via
> a serial port). That would make them stratum 1. I recently did this on
> my own wi
Richard Laager via devel writes:
> I'm working with a small, Canadian Internet exchange that offers an NTP
> service. They originally had one CDMA and one NTP master clock NTP
> server feeding (via NTP) 3x Ubuntu + NTP Classic servers facing the
> world. This is in a data center. They have one GPS
> It'd be nice if we could also replace the dead GPS master clock with a
> directly connected GPS receiver, so we get PPS into the server (e.g. via a
> serial port). That would make them stratum 1. I recently did this on my own
> with a ublox 6 evaluation kit that I picked up for cheap on eBay. F
Yo Richard!
On Wed, 13 Nov 2019 16:42:37 -0600
Richard Laager via devel wrote:
> On 11/13/19 1:43 PM, Gary E. Miller via devel wrote:
> > Add a GHz power divider for $10 and run all 3 on one antenna.
>
> So basically any splitter that has 3-4 outputs, e.g. SMA connectors,
> and a rating of 1-
On 11/13/19 1:43 PM, Gary E. Miller via devel wrote:
> Add a GHz power divider for $10 and run all 3 on one antenna.
So basically any splitter that has 3-4 outputs, e.g. SMA connectors, and
a rating of 1-2 GHz (to cover the GPS bands)?
Does this assume an unpowered antenna and GPS receivers that
Yo Richard!
On Wed, 13 Nov 2019 11:38:40 -0600
Richard Laager via devel wrote:
> The tentative plan is to upgrade/reinstall Ubuntu, switch to NTPsec,
> and deploy NTS. That's all easy.
Yup.
> It'd be nice if we could also replace the dead GPS master clock with a
> directly connected GPS receiv
This is a bit off-topic, but I'm hoping this list can help.
Context, to avoid the XY problem:
I'm working with a small, Canadian Internet exchange that offers an NTP
service. They originally had one CDMA and one NTP master clock NTP
server feeding (via NTP) 3x Ubuntu + NTP Classic servers facing
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