[time-nuts] Datum 9390 issues & spectracom 8195a woes

[Rob Kimberley]

Didier,

The 9390s were supplied with Trimble Bullets and were usually very sensitive
as long as you watch cable length/attenuation. 
It sounds like you Bullet is faulty.
Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Didier Juges
Sent: 09 June 2013 19:42
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Datum 9390 issues & spectracom 8195a woes

My own Trimble Bullet, and others as far as I can tell by reading this list,
is not very sensitive in general. I get much better results with a
Symmetricom than with the Bullet. For that matter, I also see more
satellites with a cheap mag-mount GPS active antenna than with the Bullet.
It is working, but not well.
However, if you don't see any satellite with it and it is mounted reasonably
well, it may be broken.

Didier


On Sun, Jun 9, 2013 at 12:15 PM, Tammy A Wisdom
<tammy-lists at wiztech.biz>wrote:

> Hi all
> I have a datum 9390 that will pick up GPS and get the date etc but 
> will not go into oscillator lock state. Anyone have any suggestions on
this?
>
> Next up is the spectracom 8195a I have. Allegedly it was working when 
> removed from an American tower site. Sadly it doesn't see any GPS 
> satellites. I'm guessing when it was removed someone cut the antenna coax.
> It still has 4.5v dc on the antenna port but never sees any satellites.
> This device uses oncore gps module. Does anyone know if a) if I 
> replace said oncore module will it actually work & b) is there 
> anything goofy they did with the antennas on these units?  & c) is it 
> possible they blew the front end of the oncore?  I'm using a trimble 
> bullet antenna with both devices
>
> That all said. If you have a working 9390 or 819x gps reciever that 
> you would consider parting with please let me know. I'm trying to put 
> together a ntp server for my collocation facility.
>
> Thank you
> Tammy A Wisdom
>
>
> Sent from my iPhone
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