[App_rpt-users] RTCM with GPS

[Bryan Fields]

Also, check that the port it's on is set to 10/half. The RTCM is very unforgiving of network misconfiguration and does not do auto negotiation. 

--
Bryan Fields, W9CR 
(not a CCIE; too busy actually building networks)

On May 1, 2015 7:18:46 PM EDT, Chuck Henderson <rpt2 at chuck.midlandsnetworking.com> wrote:
>I don't think that you said, but I will assume that you are using the
>Garmin GPS and that you have it located where it has a clear view of
>the
>sky and that you have it cabled correctly and with the correct
>settings, up
>to date firmware in the RTCM, etc...  Most likely IMHO, you have a
>network
>problem on your Ethernet or your network between your RTCM and your
>computer.  I have found that if there are lots of errors, collisions,
>re-transmissions and the such on the network, the RTCM just looses
>track of
>the GPS.  Fix the network problem and the GPS will mysteriously start
>working great.
>Chuck Henderson, CCIE2285, WB9UUS
>
>
>On Fri, May 1, 2015 at 5:39 PM, Jeff Carrier <k0jsc.jeff at gmail.com>
>wrote:
>
>> Ok i've had pretty wide variation of replies.  When I see GPS drop
>and
>> restore on the console it always indicates 10 satellites in view. 
>I'm
>> assuming the RTCM is looking for 10.
>>
>> On Fri, May 1, 2015 at 3:06 PM, Mike Tubby <mike at tubby.org> wrote:
>>
>>>
>>> For a 2D fix you need a minimum of 3 satellites
>>> For a 3D fix you need a minimum of 4 satellites
>>>
>>> Beyond this "more is better".
>>>
>>> HTH
>>>
>>> Mike G8TIC
>>>
>>>
>>> On 01/05/2015 20:41, Jeff Carrier wrote:
>>>
>>> Does anyone know how many satellites are required for a good GPS
>lock.  I
>>> keep losing lock which is causing me to lose the system.
>>>
>>>
>>>  K0JSC
>>>
>>>
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