[App_rpt-users] Voter Lost Master Timing Source

Skyler F electricity440 at gmail.com
Mon Jan 9 20:19:47 EST 2017


Yeah bypassing the switch and having both the RTCM and the Server on the
router solved the problem.

Initially I had both the server and the RTCM on the switch. The RTCM didn't
even seem to find the server if I am not mistaken. Second, I moved the RTCM
to the router and left the server on the switch. It seems to work fine
initially, but it kept "loosing host" for a second and then finding it
again.

Now that both the RTCM and server are directly on the router, it seems to
be working OK.

Don't think it's a GPS issue, but we do have to move the GPS outside of the
fan hole of the shack for a better signal eventually.

I am still really confused how 9600 baud works for so many people with the
GPS-18. The yellow GPS light does not activate when I set the RTCM to 9600.
Only 4800.

I am leaving back to college in a week but I might get one more chance to
go out there and try a new switch or have someone else do it, I'll report
back if I do that.

We also noticed a glitch in the RTCM where if you take network out enough
times, it will fail to boot when it reboots on acquisition of network.
We're working on a way to hard reboot in the event that does happen.
Apparently it is a known glitch according to RMHAM.

 We're thinking of leaving the previous repeater controller in just for RX
and using DTMF to control a relay on the logic ports to switch power to the
RTCM. Maybe even enable TX on the controller on a last resort failover to
at least keep the repeater running non-voting.


Skyler kd0whb

On Mon, Jan 9, 2017 at 5:19 PM Sam Skolfield <kj6qfs at gmail.com> wrote:

> Also, try another model Ethernet switch if you can just for kicks.
>
> On Mon, Jan 9, 2017 at 4:18 PM Sam Skolfield <kj6qfs at gmail.com> wrote:
>
> Having rtcms on the same physical switch as the server is the *most* ideal
> scenario you could possibly have. Should present less problems rather than
> more.
>
> Have you watched the RTCM's console during the drops to see if it mentions
> anything about GPS Unlock? If not, does it present any other data of
> interest when the server loses the RTCM?
>
> Also, as I remember, the LVC18 needs to be configured with its windows
> program for different baud rates, not sure if you're already doing that.
>
> On Mon, Jan 9, 2017 at 3:34 PM Skyler F <electricity440 at gmail.com> wrote:
>
> We are using the Garmin GPS 18, and when we switch it to 9600 Baud, the
> GPS light never lights up, it needs to be on 4800 baud to actually get a
> GPS lock.
>
> It looks like it might have to do with the ethernet switch, tried
> connecting directly to the router, and no issues yet, i'll report back if
> it decides to randomly loose connection to LAN server again. Does anybody
> have experience with RTCM's on a network switch?
>
> On Mon, Jan 9, 2017 at 4:12 PM, Joe Moskalski <kc2irv at gmail.com> wrote:
>
> It sounds like the RTCM is losing the connection with the GPS unit. If it
> does, the host connection drops. I had this issue if I was using 4800 baud
> for my NMEA data. I switched it 9600 and the issue went away.
>
> On Jan 9, 2017 6:01 PM, "Skyler F" <electricity440 at gmail.com> wrote:
>
> With the RTCM and the Main server on the same LAN, and the RTCM pointing
> at the LAN IP of the server, 10 minutes or so, the RTCM looses the master
> server and then comes back, it gives offline and says the host connection
> was lost, then quickly goes back to OK.  Has anybody seen this before?
>
>
>
>
>
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> --
> Skyler Fennell
> amsatnet.info
> KDØWHB
> electricity440 at gmail.com
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