Re: [AFMUG] RackInjector and SyncPipe

[Forrest Christian (List Account)]

There's this really nice "GPS status" page on the rackinjector which will
show you when the GPS receiver drops a pulse, or detects a misaligned
pulse.As a general rule, only the 'correct' counter should be
incrementing - bearing in mind that GPS timing is not perfect, and you will
get an occasional missing and/or misaligned pulse.  I would be really
interested in knowing if any counters (other than correct) increment around
the same time as you see this issue.

If the GPS is missing an occasional pulse and it's causing this error, I
might be able to patch this in software by telling the GPS to holdover the
pulse for some period.   So far, I haven't been able to determine if this
is a missing pulse issue or not.

We do have a growing, but still very small (2-3), group of operators which
have seen a problem which matches yours.At least 2 of them have
reported that this affects 900 and 2.4 450i products and that 5.7 radios
seem at least mostly immune.   There are also some on the cambium forum
which report similar issues with various other sync products (CTM or CMM)
but again on the 2.4/900 450i's.

One theory is that the radios occasionally will pick up a pulse from a
source they are not using, and will attempt to switch to it for some
reason.As a result, one thing to try is to turn off the unused sync
sources via telnet, specifically one of:

syncpowerport off
syncpowerport off camb
synctimingport off

The first is for traditional canopy sync, the second is cambium sync, and
the final one is timing port sync.These are immedate, and are sticky
after a reboot.  Switching off to on in the command will undo this change.

-forrest

On Sun, Jun 10, 2018 at 12:49 PM, Matt  wrote:

> I have a rackinjector with Cambium Sync. My PMP450i devices seem to keep
> losing sync. I updated the firmware on the RackInjector to the 2018-05-07
> latest. That seemed to help some. I still seem to lose sync on all
> connected devices every 8 hours or less very briefly. I moved syncpipe for
> cleaner sky view. Still dropping.  Some of the devices are halfway up 190
> foot tower and some at top so different cat5 lengths. Seems to affect them
> all. This is newer syncpipe with door on it. Is there anyway to tell in
> logs where the sync loss is coming from etc?
>
>
>


-- 
*Forrest Christian* *CEO**, PacketFlux Technologies, Inc.*
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
forre...@imach.com | http://www.packetflux.com
  

[AFMUG] RackInjector and SyncPipe

[Matt]

I have a rackinjector with Cambium Sync. My PMP450i devices seem to keep
losing sync. I updated the firmware on the RackInjector to the 2018-05-07
latest. That seemed to help some. I still seem to lose sync on all
connected devices every 8 hours or less very briefly. I moved syncpipe for
cleaner sky view. Still dropping.  Some of the devices are halfway up 190
foot tower and some at top so different cat5 lengths. Seems to affect them
all. This is newer syncpipe with door on it. Is there anyway to tell in
logs where the sync loss is coming from etc?