ePMP is frustrating to say the least. My favorite story was of a customer who couldn't make ePMP work with a powerinjector. We sent replacement equipment and they had a full tower of spares.
Swapped the entire tower one by one piece. Still wouldn't work. Everything looks fine, lights blinking, etc.... They took the original equipment back to the shop. Hooked it up on the bench, worked perfectly. Mind you this is exactly the gear on the tower which didn't work - no configuration changes, etc, other than using patch cables to make it work. Then they took that equipment back out to the tower, swapped it back in so it was identical to the original and amazingly it all works perfectly. As far as I know it is still working just fine. I've had exactly one time on the bench that I couldn't get an ePMP to sync up. Could reboot it, swapped cables, etc, still no work. Grabbed the cable I use to hook a cable up to the scope.... Plug it in, ePMP immediately starts working. "Fine, it's something which this cable changes". Put the original cable back in place, ePMP *still* receiving sync fine. No matter what I try I can't get it to fail again. So much for being able to reproduce it. Just out of curiosity, did any of the Jumpers in the PowerInjector+Sync get changed? Is this a gigabit powerinjector? -forrest On Tue, Mar 28, 2017 at 9:23 PM, Brandon Yuchasz <[email protected]> wrote: > That’s George and Josh, > > We are running 2.6.2.1. Ill do some more testing on a bench and see what I > can figure out. Certainly is frustrating. I reached out to Forest to see > his thoughts as well. > > > > Brandon > > > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *George Skorup > *Sent:* Tuesday, March 28, 2017 8:37 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] 2.4 epmp and packetflux > > > > I have a PowerInjector+Sync w/ a SyncBox attached running on the bench. > Receiving sync just fine. 48VDC supply on PowerA. New out of the box, no > jumper changes. > > Plugged in a 5GHz GPS radio running 3.2.2. Puck disconnected, radio laying > face down on the table. Set sync source to CMM3. Saved and power-cycled. > CMM sync status is down. On-board GPS status shows n/a lat, long and > height. 2 sats visible, 0 tracked. CMM sync finally comes up after 3 > minutes and 15 seconds or so. If the radio comes up with a good on-board > GPS lock, it will receive CMM sync pretty fast. If I simply reboot the > radio, CMM sync is up a few seconds after it lets me log in. A power-cycle > resets the on-board GPS (obviously), but a soft reboot does not. > > I remember someone from Cambium explained some of this several months ago. > Maybe Sriram or Dan Sullivan? They use the on-board GPS for timing, > regardless if a CMM is in use or not, but if it is, then the > sync-over-power pulse is fed into the on-board GPS. Whereas with Canopy, > this is all done in the FPGA. So I suppose if the on-board GPS locks up, > then perhaps CMM sync won't work either. I don't really know. > > I don't know what to tell you other than ask Cambium for help. > > On 3/28/2017 4:07 PM, Brandon Yuchasz wrote: > > I figured someone had to be doing it. Its not that big of deal until we > have a failure on one of the pucks in bad weather and then we will want to > drop back to the packetflux. I can’t figure out why the 450i works fine and > the epmp wont. Its seems like they should be the same. We started on 24 > volts went to 29.5 volts and then to 48 volts just to match the 450i stuff. > No difference. > > > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Josh Luthman > *Sent:* Tuesday, March 28, 2017 3:33 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] 2.4 epmp and packetflux > > > > 24v Power Injector has worked for ages here. CMM3 on four 2.4 and four 5 > GHz. > > > > > Josh Luthman > Office: 937-552-2340 <(937)%20552-2340> > Direct: 937-552-2343 <(937)%20552-2343> > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > > > On Tue, Mar 28, 2017 at 12:39 PM, Brandon Yuchasz <[email protected]> > wrote: > > Is anyone successfully running epmp 2.4 aps on packetflux as the primary > GPS for them? We have our sites with the onboard GPS puck as the primary > GPS and just recently started powering the newest sites with Packetflux in > order to provide a secondary GPS signal. At one site we has an AP that the > puck GPS was blocked during install and would not receive sync so we turned > on CMM3 and never were able to get GPS. Eventually we just did a climb and > moved the puck and its receiving GPS now. > > > > Last week when installing a new site I decided to try GPS through the > packetflux again and was not able to receive it. If I swap one of the > cables from a 450i into the same port on the packetflux we get GPS no > problem on the 450i AP but no joy on the epmp. I even went out and grabbed > an extra AP off the truck plugged it in with a 2 foot none shielded > Ethernet to the packetflux and still no GPS on CMM3. > > > > We are using power injector plus at the newest sites. No changes using > them out of the box on 48 volts and like I mentioned they provide GPS just > fine to the450i. > > > > > > So I am wondering if anyone is running this setup successfully of if we > are all just using the puck. > > > > Thanks, > > Brandon > > > > > > > -- *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 [email protected] | http://www.packetflux.com <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> <http://twitter.com/@packetflux>
