>Thoughts? Don't buy a CMM4.
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Wed, Jun 3, 2015 at 4:07 PM, Forrest Christian (List Account) < [email protected]> wrote: > On the cambium ask the synchronization experts thing I'm doing someone > pointed out the section in the ePMP manual talking about frequency reuse. I > had to go look since I had somehow missed that section. In case you > haven't seen it, there's a deep discussion about the proper settings when > you have a "mixed" network of internal GPS, CMM3 and CMM4. (See Page 94 > in the current release). I admit my ignorance and I hadn't seen this yet, > but..... > > All I have to say is this: WTF Cambium? > > Ok, I know the dirty little secret that the CMM3 and CMM4 produce > different timing pulses. Obviously different enough that it matters in > the ePMP world. But the difference is easy enough to fix... add a fixed > amount of delay which varies based on the timing source. They already > have to delay the GPS timing signal to match the CMM4. Why not delay the > two sources which are 'early' to match the 'late' source? Or even better, > fix the CMM4 so it matches every other sync source on the planet - I'm > shocked this hasn't already been done. Ok, I get it, it might be a > hardware limitation which prevents one or both of the solutions. But come > on, really? > > For the record the syncinjectors currently produce "CMM3" timing, not > "CMM4". Since it's obvious that the difference matters now, I'm > considering adding a software witch which allows this to be configured so > you don't have to deal with a 'mixed' timing source since it seems like a > CMM4 and internal GPS are identical. This should permit better operation > when you have to switch between an internal GPS and a SyncInjector. > > Thoughts? > > -- > *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> > >
