There is a 3G/4G Supplementary Downlink allocation at 1492MHz in some countries. Close enough to cause problems.
Andy www.g4jnt.com On Mon, 11 Jul 2022 at 14:40, paul swed via time-nuts < time-nuts@lists.febo.com> wrote: > Skipp > I am aware at least in the US that there is the possibility of 5G > interference along with newer possible bands that 5G can use. I have read > several articles in a publication called GNSS. > > > Thats why I am using wwvb at 60 KHz. Humor intended. > Regards > Paul > WB8TSL > > On Mon, Jul 11, 2022 at 8:49 AM skipp Isaham via time-nuts < > time-nuts@lists.febo.com> wrote: > > > Hello to the Group, > > > > I'd like to get some opinions and war stories regarding GPS reliability > at > > high RF level and elevation locations. > > > > Background: Three different hill-top GPS receivers, all different types, > > using > > different antennas mounted on an outside fixiture, plain view of the open > > sky, > > all stopped working. > > > > Test antennas were brought in and placed on a fixture well away from the > > original antennas, the recevers went back in to capture and lock. > > > > From what I understand, the original antennas are what I would call > > straight > > preamp with no pre-selection / filtering. > > > > The ordered and now inbound replacements are said to contain a SAW filter > > system. It is the intent of the client to just place these "improved > > antennas" in > > to service and get on with life. > > > > I would suspect a GPS antenna (and receiver) could be subject to RF > > overload > > or blocking, however, we're assuming nothing major has changed at the > > site, nor > > any nearby location. One might think there are more GPS receivers being > > pushed > > out of reliable operation by the world around them, I'm just not hearing > > those stories > > from a lot of people using them (GPS receivers). > > > > Any new install GPS receiver antenna ordered will/should contain some > > pre-selection > > to potentially avoid a problem, even some years down the road? Seems like > > that's > > where things are going... no more off the shelf, wide band, (hot) > > preamplified GPS antennas > > in busy locations? > > > > Thank you in advance for any related comments and/or opions ... > > > > cheers, > > > > skipp > > > > skipp025 at jah who dot calm > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-le...@lists.febo.com > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-le...@lists.febo.com > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-le...@lists.febo.com