[time-nuts] No GPS satellites

[Azelio Boriani]

Yes, the TrueTime unit needs its antenna/downconverter to work. Other
GPSDOs, like the Meinberg units GPS-SA used in the Rohde Schwarz
ED167MP have this arrangement.

On Wed, Feb 25, 2015 at 8:35 PM, Doug Ronald <doug at dougronald.com> wrote:
> 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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