[GPS_Standard] Occasional drops to Unloked

[Mark G0MGX]

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
>
>
>