[time-nuts] Lucent RFTG-m-XO GPSDO

paul swed paulswedb at gmail.com
Fri Oct 7 10:23:06 EDT 2011


My comment would be that some gps receivers want to see a particular antenna
current.
Maybe thats low.
Further if the battery backup for the gps unit has failed it can easily take
4-6 hours to figure life out on older receivers. Unless like odetics you can
tell it what sat to look for, not likely since these were intended for
un-attended sites. If you power down it has to start all over again....
Good luck and we will all learn from your effort.
Paul
WB8TSL

On Fri, Oct 7, 2011 at 10:12 AM, Peter Bell <bell.peter at gmail.com> wrote:

> I have been playing with one of these units, and noticed that there
> has been some discussion on them before on this list, so I wondered if
> anyone might have any suggestions.
>
> Basically, the unit powers up correctly, but the "No GPS" LED never
> goes off - this obviously could be because it's broken or doesn't like
> my antenna, but with some of these telecom GPSDOs you have to manually
> trigger a site survey if you move them to another location. Does
> anyone know if this Lucent box is like that?
>
> Everything else seems to be working - once the "OK" light comes on the
> 15MHz output is enbled, the "No GPS" LED goes from solid to blinking
> if you disconnect the antenna - it just doesn't want to get GPS lock.
>
> I suppose I could pull the Oncore board (a UT+ according to the label)
> out of it and test that on it's own - but I thiought I would see if
> maybe it's a known issue first.
>
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