This is not a High RF Site. Ham Operator and a Helicopter Relay for a
TV Station (Not TV Transmitter) What Should I measure with the volt
meter? From the APC Ground line to the building ground?
On 3/31/2015 12:26 PM, Jaime Solorza wrote:
Ok. I just asked my two automation engineers to explain ground
bounce. They never the term. They assumed that voltage is getting
injected or introduced into line somewhere. Recommended voltmeter and
checking wires first
Jaime Solorza
On Mar 31, 2015 11:14 AM, "Forrest Christian (List Account)"
<[email protected] <mailto:[email protected]>> wrote:
Is this a higher RF site?
I don't remember is the GIGE-APC high voltage? If this is a low
voltage unit, you may be seeing some sort of ground bounce and/or
RF triggering the surge supressor.
On Tue, Mar 31, 2015 at 10:49 AM, Nate Burke <[email protected]
<mailto:[email protected]>> wrote:
I just changed out an ATOM mikrotik to a CCR, and found that
it is Incrementing FCS Errors exactly every 30 seconds on the
Ethernet line from a Trango LYNX. The lynx is powered via DC,
so the Data line is clean of POE. I am using a GIGE-APC Unit
on the Ethernet line.
What I found through testing, was that the FCS Errors only
happened when the GIGE-APC was plugged into the chassis. They
happened at exact 30 second intervals. Because of this I'm
guessing that there is something introduced via the ground
that is causing them. If I pull the GIGE-APC out of the
Chassis, the errors stopped, if I plugged it back in, the
errors came back, at the exact same clock points (in my CCR
Log, always at 06 and 36 seconds regardless of the timing of
plugging/unplugging). I'm using the 1U APC chassis, and there
are other GIGE-APC, 444APC-HV, and GIGE-POE-APC units in it.
None of the other equipment is plugged into the CCR, so unsure
if it would increment FCS Errors on those. They are all
plugged into RB1100's, and have no errors logged in the mikrotik.
Any place to start troubleshooting something like this? Would
it make sense that something on the ground plane could cause
these Ethernet errors?
I believe that this is causing some very low level packetloss
through the link, about 1 packet every 5 minutes or so, I'm
guessing based on if the ping falls directly on the error frame.
Nate
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