From mark.g0mgx at gmail.com  Fri Aug 28 11:39:10 2015
From: mark.g0mgx at gmail.com (Mark G0MGX)
Date: Fri, 28 Aug 2015 16:39:10 +0100
Subject: [GPS_Standard] Occasional drops to Unloked
In-Reply-To: <55DC7CA5.9050503@gmail.com>
References: <55DC7CA5.9050503@gmail.com>
Message-ID: <55E0809E.10509@gmail.com>

This is a resend as it seems I wasn't subscribed to the list when I sent 
the original!

Mark
G0MGX

On 25/08/2015 15:33, Mark G0MGX wrote:
> Hi
>
> Not sure if there is any activity on this list but I built my GPS 
> referenced OCXO around two years ago:
>
> http://g0mgx.blogspot.co.uk/2013/11/gps-disciplined-really.html
>
> but ever since I have had two problems:
>
> 1. Occasionally the unit drops out of locked mode into the unlocked 
> state. I've captured the kind of thing thats going on when this 
> happens and wondered if this was symptomatic of a OCXO issue or GPS? 
> The attached shows the device output with highlighted areas of 
> interest plus the parameter set I am using.
>
> 2. Often when I connect a cable to the units 10MHz output the unit 
> will immediately enter holdover as if an earth or power glitch?
>
>  I have another 10MHz OCXO but the startup current is nearly 2A when 
> the device is cold and that has always deterred me from trying it in 
> this GPS unit as the PSU isn't up to the job.
>
> Any pointers or suggestions very much appreciated.
>
> Thank you,
>
> Mark
> G0MGX
>
>
>


From mike at pencoys.org.uk  Sun Aug 30 01:33:55 2015
From: mike at pencoys.org.uk (Mike W)
Date: Sun, 30 Aug 2015 06:33:55 +0100
Subject: [GPS_Standard] Parameter corruption - cause?
Message-ID: <55E295C3.31571.24031D@mike.pencoys.org.uk>

good morn folks, I'm experiencing intermittant and random parameter corruption 
on both of my VE2ZAZ boards, they are running 24/7and don't corrupt at the 
same time. Driven from different 1pps sources and different psu's, they are 
both running the latest software. This has only started after upgrading the 
software. Niether have shown this behaviour on the initial version of the 
software.
Any ideas appreciated, thans, Mike G8NXD