Your using the puck that came with the unit? We had a situation where one radio would go in and out. Turned out to be a hawlk that decided where we had it was it's new home and every day when it went to bed on it we lost it. We relocated the puck to a new location to accomidate the new resident.
So try relocating the puck and see if that stops the in and out service.
Hi. We have had no problems with any GPS APs. We've iinstalled them, mounted the pucks to the south leg of the tower or mast, and we've never had a hiccup. I know that's probably not a lot of help... :)
is your puck orented with the radio waves facing up to the sky or are they laying flat? its makes a big diffrence.
we leave them attached to the flat bracket accross the back of the sectors and never have a problem. laying them horizontal will result in 10 to 15 db less SNR on a lot of sats.
No issues noted down this way...we lways make sure the top of our sector antenna has clear LOS ,and the GPS antenna is securedand level. We follow the documented Cambium Networks installation method. ( both ePMP 1000 & ePMP 2000 )
We also have a holdver time set ( greater than the default 30 seconds ) to allow the SM's to remain registered (yes I expect a performance hit during this free run period ) for a set time should we experience a loss of GPS. This may allow us time to resolve the issue if required.
Ok thanks. I 'll try orienting them vertically. They are all inside the gps spot but they all have good snr. All of a sudden I loose sync, look at the snr, and it's either all gone or dropped to less than 3 tracked with really bad snr.
Increasing your holdoff timer may alleviate the situation.
Also, out of curiosity, are you using the old ePMP1000 GPS antenna with the ePMP2000 or are you using the GPS antenna included with the ePMP2000 radio? The new antennas have better filtering/gain than the old one, plus they will allow the GPS chip to also use GLONASS satellites for tracking.
We are having the same issues... It started with one AP, now multiple towers, never had any issues. Now multiple sites drop Sattelites with great signal. From 13+ to 0, drops all clients, and doesn't come back.
Packet flux and cmm units can all be intermixed with the gps pucks to maintain snyc. I’d suggest on the same time source all timing from the same point. From tower to tower it doesn’t matter. By specifications they can be mixed on the same site, but I chose to avoid it. Just another peace of a puzzle if something isn’t working smooth.
Increasing your holdoff timer may alleviate the situation.
Also, out of curiosity, are you using the old ePMP1000 GPS antenna with the ePMP2000 or are you using the GPS antenna included with the ePMP2000 radio? The new antennas have better filtering/gain than the old one, plus they will allow the GPS chip to also use GLONASS satellites for tracking.
Regards
@Luis, do you have a partnumber for that new antenna? google and I aren't getting along so well with this.
Increasing your holdoff timer may alleviate the situation.
Also, out of curiosity, are you using the old ePMP1000 GPS antenna with the ePMP2000 or are you using the GPS antenna included with the ePMP2000 radio? The new antennas have better filtering/gain than the old one, plus they will allow the GPS chip to also use GLONASS satellites for tracking.
Regards
@Luis, do you have a partnumber for that new antenna? google and I aren't getting along so well with this.
Increasing your holdoff timer may alleviate the situation.
Also, out of curiosity, are you using the old ePMP1000 GPS antenna with the ePMP2000 or are you using the GPS antenna included with the ePMP2000 radio? The new antennas have better filtering/gain than the old one, plus they will allow the GPS chip to also use GLONASS satellites for tracking.
Regards
@Luis, do you have a partnumber for that new antenna? google and I aren't getting along so well with this.
yes sir, ATT has been upgrading their gear here which has been causing gps problems for our 1000 gear. going to switch a site out to these antennas to see if it helps. I can't find where to buy these for spares? plenty of the old round GPS pucks around though.
We did(and still have) canopy with packetflux for years and I don't remember ever having problems with GPS sync... really I can't remember a single instance were GPS failed in the last 10 years on a packetflux/canopy, 450 or even Airfiber. Since we already had canopy on most of the towers we put ePMP on we just went ahead and used packetflux to power the ePMP but used the pucks for gps. It seems like once very few months an ePMP radio will lose GPS sync, sometimes even though it showed it could see a 20 sats and was tracking 18 of them it wouldn't have GPS sync. Other times it would lose the sats and of course lose GPS sync. So on the towers were we already had them powered with SyncInjectors I just changed them over to sync over power.
I have 3 towers that never had Canopy on them so I don't have packetflux on those towers. All 3 towers have at least 1 ePMP AP or backhaul that I have had to disable sync on because they kept randomly losing it or it just stopped working period. I am in the process of getting the three towers changed over to packetflux simply so we can get reliable sync on the ePMP stuff. Luckily 5Ghz don't travel as far as 900Mhz and we aren't doing ABAB on any of the affected towers or losing GPS sync on a radio would be a much bigger problem.
All 3 sites are standpipe water tanks , the radios are on the very top and the pucks have no obstruction in any direction, the entire sky is visible. All the radios see 19'ish sats at -19 to -48 and tracking 18 of them. Two of the 3 ePMP radios that have this problem are radios and have the new style GPS puc, only one is the old style GPS puck.
While the old canopy, new 450i and airfiber give me no GPS problems at all the ePMP AP's have always had random GPS problems.
I ordered a sync pipe for this site to try it out. Can’t get the radios to stay at gig connection, that being said we are pushing cable length here, 99 meters according to the netonix switch. I had horrible luck with the packetflux gear getting hit and taking out mysites. In the last 6 years we’ve had 6 major strikes, all of which was a packetflux injected or timed site (also only makes up about 10% of my network. ) they come off as to much of a hazard to my network for me to swallow. When i called support at packetdlux over tge sync problem remaining st this site, the request was to bypass the LPU, not gonna happen. The gps has been stable for us with the epmp until ATT started changing nodes here. Everything with glonass antennas have been fine.
I also have noticed with both antennas, the orientation of the gps puck matters, a lot. Laying flat here takes 10 to 15 db snr from our signal. Upright so the coax is going towards tge ground from the sectors works the best for us.
Ive already pulled the packetflux gear to return… won’t run gear without full protection anymore. Anyone used a cmm4 and compared them to this problem?
The problem is a Chinese satellite out of its orbital position. I understand that they are already interceding for the owner to correct the problems that are causing.
Same issues here. I've contacted support, and I get the same reply that's of no help. "Change your Antenna, go test GPS with your cell phone" When I have 10 APs on the same site, and I colocate their pucks in the same orinatation and we will see random loss of GPS across the sites and it will almost never auto recover. Requires a hard reboot of the AP.
I have noticed our sites that are aginst a hill seem to be impacted the most, but it's never ALL aps at one site. It's only ever one at a time, and they don't recover typically need a hard reboot.
Same issues here. I've contacted support, and I get the same reply that's of no help. "Change your Antenna, go test GPS with your cell phone" When I have 10 APs on the same site, and I colocate their pucks in the same orinatation and we will see random loss of GPS across the sites and it will almost never auto recover. Requires a hard reboot of the AP.
I have noticed our sites that are aginst a hill seem to be impacted the most, but it's never ALL aps at one site. It's only ever one at a time, and they don't recover typically need a hard reboot.
We had am issue a long time ago simular to what you described, i actually traced it down to one specific AP causing interference to the rrst of our APs. Next time you loose sync, hard power cycle the APs that ARE getting sync, wait 5 minutes between cycles to see when your def one starts getting sync. If you can pin it down to one ap, replace that one. I have no idea how or why that happens, but ive found that one time. It progressively got quicker and quicker. The issue the rest of the thread discribes is a interference issue related to being drown out from a carrier, or atleast thats what ive gathered from them. Fighting that problem now myself.