I'm going to guess intermod between two nearby high-power transmitters.
We had something like this at one of our sites a few years ago at around
500 MHz. Trouble was, there was no equipment installed that was
operating at that frequency. There were, however, several high power
transmitters, and if you were in the wrong place at the wrong time, you
would see this 500 MHz signal.
bp
<part15sbs{at}gmail{dot}com>
On 2/25/2015 2:07 PM, Jaime Solorza wrote:
We should try our luck here: Let's make a list of possible causes of
this 711MHz noise.
I forgot to ask what kind of cable are you using for data and power to
your radios and what other gear in your mix.
the guy that gets it right will be named Magnus Vir in orbis
terrarum....or mundus is more correct...
Jaime Solorza
Wireless Systems Architect
915-861-1390
On Wed, Feb 25, 2015 at 2:55 PM, Mike Hammett <[email protected]
<mailto:[email protected]>> wrote:
With the UBNT equipment, it's the clock rate of the CPU.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Bill Prince" <[email protected]
<mailto:[email protected]>>
*To: *[email protected] <mailto:[email protected]>
*Sent: *Monday, February 23, 2015 4:59:36 PM
*Subject: *Re: [AFMUG] 711Mhz carrier?
-87 sounds like a big deal to me if your RSSI comes in around -100
or so.
That said, isn't the IF on Dragonwave in the 900 MHz band?�
I would not expect the Redline to have an IF at all.
bp
<part15sbs{at}gmail{dot}com>
On 2/23/2015 2:08 PM, Peter Kranz wrote:
Had an AT&T contractor show up at one of our datacenter sites
today and claim that one of our radio systems was emitting a
carrier at 711Mhz and he pointed at where we have a Dragonwave
Compact 18Ghz system and Redline AN-80i 5Ghz system mounted on
the building.
�
711Mhz doesn�t sound like an IF of either of these systems
to me, but I�ve got tickets in with the equipment manuf. It
looks like they are some 3^rd party AT&T has sweeping
buildings downtown. Anyone dealt with these guys before? He
told me he measured a -87 with his directional antenna 10 feet
away from the equipment and acted like that was a really big
deal, sounds like a pretty low level to me honestly. Anyone
know what the legal limits for spurious emissions are in the
700-800Mhz band?
�
*Peter Kranz
*Founder/CEO - Unwired Ltd
www.UnwiredLtd.com <http://www.unwiredltd.com/>
Desk: 510-868-1614 x100 <tel:510-868-1614%20x100>
Mobile: 510-207-0000 <tel:510-207-0000>
[email protected] <mailto:[email protected]>
�
