I’ve seen this happen when the puck isn’t horizontal. I think that’s why they made the new ePMP antennas lock that puck in the top so it either doesn’t fall off or the tower climber sticks in to the side of something.
Puck must be horizontal at all times. Andy Trimmell Systems Engineer PDS Connect 317-831-3000 From: Af [mailto:[email protected]] On Behalf Of Eric Muehleisen Sent: Friday, December 01, 2017 9:57 AM To: [email protected] Subject: Re: [AFMUG] GPS visible vs tracked Brand new GPS antenna and coax cable. Also hasn't rained in quite some time at this location. I should have mentioned that to start. Sorry. On Fri, Dec 1, 2017 at 8:55 AM, Wireless Administrator <[email protected]> wrote: I’ve had problems like that caused by water/condensation in the GPS antenna or coax. Steve B. From: Af [mailto:[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?
