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 <d...@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 > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
