[time-nuts] No GPS satellites

[Tom Van Baak]

Mike,

That's the same card I used for the 40-day run: 
http://leapsecond.com/pages/mains/

It's robust and professional (used in the electric grid industry) and nice if you already have a working XL-DC but most of us now use a $1 microcontroller or DCD pin and NTP to track mains phase & frequency. 

/tvb

> On Feb 26, 2015, at 2:27 AM, Mike Cook <michael.cook at sfr.fr> wrote:
> 
> Just a heads up as I stumbled on an interesting XL-DC plugin module for sale on ebay  while looking for info for Doug.
> TrueTime Symmetricom XL-DC FTM-III AC Line Frequency Measurement & Time Monitor
> 
> Unfortunately I don’t have an XL-DC, but it looks just just the tick for a time nut who has. 
> 
> 
> "Ceux qui sont prêts à abandonner une liberté essentielle pour obtenir une petite et provisoire sécurité, ne méritent ni liberté ni sécurité."
> Benjimin Franklin
> 
>> Le 25 févr. 2015 à 20:35, Doug Ronald <doug at dougronald.com> a écrit :
>> 
>> I'm hoping someone can shed some light on my problem receiving any GPS satellites.
>> 
>> I have two TrueTime GPS Time & Frequency Receivers, Model XL-DC. One has a regular crystal oscillator, and the other one has a rubidium oscillator. I have two outdoor GPS antennas with internal LNAs, one a 28 dB gain unit, and the other a 40 dB unit. When either antenna is connected to my Lucent KS-24361, it locks right up and tracks up to 8 satellites. When either of the antennas is connected to the XL-DCs, they just sit there and status : "Looking for GPS satellites".
>> 
>> In the Alarm menu of either XL-DC there is an alarm for Antenna. Both units say "OK" and if I disconnect the antenna they both logically say "Open". So, what is the problem? I can't believe I don't have enough signal, after the Lucent locks-up right away. Is it possible the TrueTime sanctioned antenna has a down converter in it, perhaps placing the GPS signal from L-band to some lower frequency? I would appreciate any info the group might have...
>> 
>> -Doug Ronald
>> W6DSR
>> 
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