That's interesting. The 900mhz noise floor at this location is very loud. State lottery uses a 900mhz MDS radio that is right across the street. We are planning to relocate the GPS antenna to the opposite side of the building next week.
On Fri, Dec 1, 2017 at 10:15 AM, [email protected] < [email protected]> wrote: > Check 900MHz noise. We have two sites with high 900MHz noise and those are > the ones that have GPS issues. > > On Fri, Dec 1, 2017 at 10:30 AM, Wireless Administrator <[email protected]> > wrote: > >> Ok …… >> I got it now. This was a test.(Tongue-in-cheek)Answer: “It radiation >> from a nearby star”Steve B. >> >> >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *Wireless >> Administrator >> *Sent:* Friday, December 01, 2017 10:26 AM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] GPS visible vs tracked >> >> >> >> Is it possible to place duplicate equipment at the site to see if the >> problem occurs on duplicate? >> >> >> >> Steve >> >> >> >> *From:* Wireless Administrator [mailto:[email protected] >> <[email protected]>] >> *Sent:* Friday, December 01, 2017 9:55 AM >> *To:* '[email protected]' >> *Subject:* RE: [AFMUG] GPS visible vs tracked >> >> >> >> I’ve had problems like that caused by water/condensation in the GPS >> antenna or coax. >> >> >> >> Steve B. >> >> >> >> *From:* Af [mailto:[email protected] <[email protected]>] *On >> Behalf Of *Eric Muehleisen >> *Sent:* Friday, December 01, 2017 9:51 AM >> *To:* [email protected] >> *Subject:* [AFMUG] GPS visible vs tracked >> >> >> >> We have a site where we see unusual GPS issues. I've been graphing the >> CMM4 and it visually sees between 10-15 satellites consistently. However, >> tracked satellites will go from 8-10 and drop to zero for hours at a time, >> then fully recover. This happens randomly a few times a week. It's gotten >> worse over the past month. >> >> >> >> See attached. If you notice, there is an FM antenna right next to our >> equipment. We have occasional ethernet related issue as well. This tends to >> get worse when it rains, but overall hasn't been a major issue. >> >> >> >> Could our GPS issues be related to the FM station? We plan on moving the >> GPS antenna to another location next week. Has anyone seen anything like >> this before? >> > >
